#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
-#include <limits.h>
#include "cache.h"
+#include "quote.h"
#include "diff.h"
+#include "diffcore.h"
#include "delta.h"
+#include "xdiff-interface.h"
+#include "color.h"
+
+static int use_size_cache;
+
+static int diff_detect_rename_default;
+static int diff_rename_limit_default = -1;
+static int diff_use_color_default;
+
+static char diff_colors[][COLOR_MAXLEN] = {
+ "\033[m", /* reset */
+ "", /* PLAIN (normal) */
+ "\033[1m", /* METAINFO (bold) */
+ "\033[36m", /* FRAGINFO (cyan) */
+ "\033[31m", /* OLD (red) */
+ "\033[32m", /* NEW (green) */
+ "\033[33m", /* COMMIT (yellow) */
+ "\033[41m", /* WHITESPACE (red background) */
+};
+
+static int parse_diff_color_slot(const char *var, int ofs)
+{
+ if (!strcasecmp(var+ofs, "plain"))
+ return DIFF_PLAIN;
+ if (!strcasecmp(var+ofs, "meta"))
+ return DIFF_METAINFO;
+ if (!strcasecmp(var+ofs, "frag"))
+ return DIFF_FRAGINFO;
+ if (!strcasecmp(var+ofs, "old"))
+ return DIFF_FILE_OLD;
+ if (!strcasecmp(var+ofs, "new"))
+ return DIFF_FILE_NEW;
+ if (!strcasecmp(var+ofs, "commit"))
+ return DIFF_COMMIT;
+ if (!strcasecmp(var+ofs, "whitespace"))
+ return DIFF_WHITESPACE;
+ die("bad config variable '%s'", var);
+}
+
+/*
+ * These are to give UI layer defaults.
+ * The core-level commands such as git-diff-files should
+ * never be affected by the setting of diff.renames
+ * the user happens to have in the configuration file.
+ */
+int git_diff_ui_config(const char *var, const char *value)
+{
+ if (!strcmp(var, "diff.renamelimit")) {
+ diff_rename_limit_default = git_config_int(var, value);
+ return 0;
+ }
+ if (!strcmp(var, "diff.color")) {
+ diff_use_color_default = git_config_colorbool(var, value);
+ return 0;
+ }
+ if (!strcmp(var, "diff.renames")) {
+ if (!value)
+ diff_detect_rename_default = DIFF_DETECT_RENAME;
+ else if (!strcasecmp(value, "copies") ||
+ !strcasecmp(value, "copy"))
+ diff_detect_rename_default = DIFF_DETECT_COPY;
+ else if (git_config_bool(var,value))
+ diff_detect_rename_default = DIFF_DETECT_RENAME;
+ return 0;
+ }
+ if (!strncmp(var, "diff.color.", 11)) {
+ int slot = parse_diff_color_slot(var, 11);
+ color_parse(value, var, diff_colors[slot]);
+ return 0;
+ }
+ return git_default_config(var, value);
+}
+
+static char *quote_one(const char *str)
+{
+ int needlen;
+ char *xp;
+
+ if (!str)
+ return NULL;
+ needlen = quote_c_style(str, NULL, NULL, 0);
+ if (!needlen)
+ return xstrdup(str);
+ xp = xmalloc(needlen + 1);
+ quote_c_style(str, xp, NULL, 0);
+ return xp;
+}
-static const char *diff_opts = "-pu";
-static unsigned char null_sha1[20] = { 0, };
-#define MAX_SCORE 10000
-#define DEFAULT_MINIMUM_SCORE 5000
+static char *quote_two(const char *one, const char *two)
+{
+ int need_one = quote_c_style(one, NULL, NULL, 1);
+ int need_two = quote_c_style(two, NULL, NULL, 1);
+ char *xp;
+
+ if (need_one + need_two) {
+ if (!need_one) need_one = strlen(one);
+ if (!need_two) need_one = strlen(two);
+
+ xp = xmalloc(need_one + need_two + 3);
+ xp[0] = '"';
+ quote_c_style(one, xp + 1, NULL, 1);
+ quote_c_style(two, xp + need_one + 1, NULL, 1);
+ strcpy(xp + need_one + need_two + 1, "\"");
+ return xp;
+ }
+ need_one = strlen(one);
+ need_two = strlen(two);
+ xp = xmalloc(need_one + need_two + 1);
+ strcpy(xp, one);
+ strcpy(xp + need_one, two);
+ return xp;
+}
static const char *external_diff(void)
{
if (done_preparing)
return external_diff_cmd;
+ external_diff_cmd = getenv("GIT_EXTERNAL_DIFF");
+ done_preparing = 1;
+ return external_diff_cmd;
+}
+
+#define TEMPFILE_PATH_LEN 50
+
+static struct diff_tempfile {
+ const char *name; /* filename external diff should read from */
+ char hex[41];
+ char mode[10];
+ char tmp_path[TEMPFILE_PATH_LEN];
+} diff_temp[2];
+
+static int count_lines(const char *data, int size)
+{
+ int count, ch, completely_empty = 1, nl_just_seen = 0;
+ count = 0;
+ while (0 < size--) {
+ ch = *data++;
+ if (ch == '\n') {
+ count++;
+ nl_just_seen = 1;
+ completely_empty = 0;
+ }
+ else {
+ nl_just_seen = 0;
+ completely_empty = 0;
+ }
+ }
+ if (completely_empty)
+ return 0;
+ if (!nl_just_seen)
+ count++; /* no trailing newline */
+ return count;
+}
+
+static void print_line_count(int count)
+{
+ switch (count) {
+ case 0:
+ printf("0,0");
+ break;
+ case 1:
+ printf("1");
+ break;
+ default:
+ printf("1,%d", count);
+ break;
+ }
+}
+
+static void copy_file(int prefix, const char *data, int size)
+{
+ int ch, nl_just_seen = 1;
+ while (0 < size--) {
+ ch = *data++;
+ if (nl_just_seen)
+ putchar(prefix);
+ putchar(ch);
+ if (ch == '\n')
+ nl_just_seen = 1;
+ else
+ nl_just_seen = 0;
+ }
+ if (!nl_just_seen)
+ printf("\n\\ No newline at end of file\n");
+}
+
+static void emit_rewrite_diff(const char *name_a,
+ const char *name_b,
+ struct diff_filespec *one,
+ struct diff_filespec *two)
+{
+ int lc_a, lc_b;
+ diff_populate_filespec(one, 0);
+ diff_populate_filespec(two, 0);
+ lc_a = count_lines(one->data, one->size);
+ lc_b = count_lines(two->data, two->size);
+ printf("--- a/%s\n+++ b/%s\n@@ -", name_a, name_b);
+ print_line_count(lc_a);
+ printf(" +");
+ print_line_count(lc_b);
+ printf(" @@\n");
+ if (lc_a)
+ copy_file('-', one->data, one->size);
+ if (lc_b)
+ copy_file('+', two->data, two->size);
+}
+
+static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one)
+{
+ if (!DIFF_FILE_VALID(one)) {
+ mf->ptr = (char *)""; /* does not matter */
+ mf->size = 0;
+ return 0;
+ }
+ else if (diff_populate_filespec(one, 0))
+ return -1;
+ mf->ptr = one->data;
+ mf->size = one->size;
+ return 0;
+}
+
+struct diff_words_buffer {
+ mmfile_t text;
+ long alloc;
+ long current; /* output pointer */
+ int suppressed_newline;
+};
+
+static void diff_words_append(char *line, unsigned long len,
+ struct diff_words_buffer *buffer)
+{
+ if (buffer->text.size + len > buffer->alloc) {
+ buffer->alloc = (buffer->text.size + len) * 3 / 2;
+ buffer->text.ptr = xrealloc(buffer->text.ptr, buffer->alloc);
+ }
+ line++;
+ len--;
+ memcpy(buffer->text.ptr + buffer->text.size, line, len);
+ buffer->text.size += len;
+}
+
+struct diff_words_data {
+ struct xdiff_emit_state xm;
+ struct diff_words_buffer minus, plus;
+};
+
+static void print_word(struct diff_words_buffer *buffer, int len, int color,
+ int suppress_newline)
+{
+ const char *ptr;
+ int eol = 0;
+
+ if (len == 0)
+ return;
+
+ ptr = buffer->text.ptr + buffer->current;
+ buffer->current += len;
+ if (ptr[len - 1] == '\n') {
+ eol = 1;
+ len--;
+ }
+
+ fputs(diff_get_color(1, color), stdout);
+ fwrite(ptr, len, 1, stdout);
+ fputs(diff_get_color(1, DIFF_RESET), stdout);
+
+ if (eol) {
+ if (suppress_newline)
+ buffer->suppressed_newline = 1;
+ else
+ putchar('\n');
+ }
+}
+
+static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len)
+{
+ struct diff_words_data *diff_words = priv;
+
+ if (diff_words->minus.suppressed_newline) {
+ if (line[0] != '+')
+ putchar('\n');
+ diff_words->minus.suppressed_newline = 0;
+ }
+
+ len--;
+ switch (line[0]) {
+ case '-':
+ print_word(&diff_words->minus, len, DIFF_FILE_OLD, 1);
+ break;
+ case '+':
+ print_word(&diff_words->plus, len, DIFF_FILE_NEW, 0);
+ break;
+ case ' ':
+ print_word(&diff_words->plus, len, DIFF_PLAIN, 0);
+ diff_words->minus.current += len;
+ break;
+ }
+}
+
+/* this executes the word diff on the accumulated buffers */
+static void diff_words_show(struct diff_words_data *diff_words)
+{
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+ xdemitcb_t ecb;
+ mmfile_t minus, plus;
+ int i;
+
+ minus.size = diff_words->minus.text.size;
+ minus.ptr = xmalloc(minus.size);
+ memcpy(minus.ptr, diff_words->minus.text.ptr, minus.size);
+ for (i = 0; i < minus.size; i++)
+ if (isspace(minus.ptr[i]))
+ minus.ptr[i] = '\n';
+ diff_words->minus.current = 0;
+
+ plus.size = diff_words->plus.text.size;
+ plus.ptr = xmalloc(plus.size);
+ memcpy(plus.ptr, diff_words->plus.text.ptr, plus.size);
+ for (i = 0; i < plus.size; i++)
+ if (isspace(plus.ptr[i]))
+ plus.ptr[i] = '\n';
+ diff_words->plus.current = 0;
+
+ xpp.flags = XDF_NEED_MINIMAL;
+ xecfg.ctxlen = diff_words->minus.alloc + diff_words->plus.alloc;
+ xecfg.flags = 0;
+ ecb.outf = xdiff_outf;
+ ecb.priv = diff_words;
+ diff_words->xm.consume = fn_out_diff_words_aux;
+ xdl_diff(&minus, &plus, &xpp, &xecfg, &ecb);
+
+ free(minus.ptr);
+ free(plus.ptr);
+ diff_words->minus.text.size = diff_words->plus.text.size = 0;
+
+ if (diff_words->minus.suppressed_newline) {
+ putchar('\n');
+ diff_words->minus.suppressed_newline = 0;
+ }
+}
+
+struct emit_callback {
+ struct xdiff_emit_state xm;
+ int nparents, color_diff;
+ const char **label_path;
+ struct diff_words_data *diff_words;
+};
+
+static void free_diff_words_data(struct emit_callback *ecbdata)
+{
+ if (ecbdata->diff_words) {
+ /* flush buffers */
+ if (ecbdata->diff_words->minus.text.size ||
+ ecbdata->diff_words->plus.text.size)
+ diff_words_show(ecbdata->diff_words);
+
+ if (ecbdata->diff_words->minus.text.ptr)
+ free (ecbdata->diff_words->minus.text.ptr);
+ if (ecbdata->diff_words->plus.text.ptr)
+ free (ecbdata->diff_words->plus.text.ptr);
+ free(ecbdata->diff_words);
+ ecbdata->diff_words = NULL;
+ }
+}
+
+const char *diff_get_color(int diff_use_color, enum color_diff ix)
+{
+ if (diff_use_color)
+ return diff_colors[ix];
+ return "";
+}
+
+static void emit_line(const char *set, const char *reset, const char *line, int len)
+{
+ if (len > 0 && line[len-1] == '\n')
+ len--;
+ fputs(set, stdout);
+ fwrite(line, len, 1, stdout);
+ puts(reset);
+}
+
+static void emit_add_line(const char *reset, struct emit_callback *ecbdata, const char *line, int len)
+{
+ int col0 = ecbdata->nparents;
+ int last_tab_in_indent = -1;
+ int last_space_in_indent = -1;
+ int i;
+ int tail = len;
+ int need_highlight_leading_space = 0;
+ const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE);
+ const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW);
+
+ if (!*ws) {
+ emit_line(set, reset, line, len);
+ return;
+ }
+
+ /* The line is a newly added line. Does it have funny leading
+ * whitespaces? In indent, SP should never precede a TAB.
+ */
+ for (i = col0; i < len; i++) {
+ if (line[i] == '\t') {
+ last_tab_in_indent = i;
+ if (0 <= last_space_in_indent)
+ need_highlight_leading_space = 1;
+ }
+ else if (line[i] == ' ')
+ last_space_in_indent = i;
+ else
+ break;
+ }
+ fputs(set, stdout);
+ fwrite(line, col0, 1, stdout);
+ fputs(reset, stdout);
+ if (((i == len) || line[i] == '\n') && i != col0) {
+ /* The whole line was indent */
+ emit_line(ws, reset, line + col0, len - col0);
+ return;
+ }
+ i = col0;
+ if (need_highlight_leading_space) {
+ while (i < last_tab_in_indent) {
+ if (line[i] == ' ') {
+ fputs(ws, stdout);
+ putchar(' ');
+ fputs(reset, stdout);
+ }
+ else
+ putchar(line[i]);
+ i++;
+ }
+ }
+ tail = len - 1;
+ if (line[tail] == '\n' && i < tail)
+ tail--;
+ while (i < tail) {
+ if (!isspace(line[tail]))
+ break;
+ tail--;
+ }
+ if ((i < tail && line[tail + 1] != '\n')) {
+ /* This has whitespace between tail+1..len */
+ fputs(set, stdout);
+ fwrite(line + i, tail - i + 1, 1, stdout);
+ fputs(reset, stdout);
+ emit_line(ws, reset, line + tail + 1, len - tail - 1);
+ }
+ else
+ emit_line(set, reset, line + i, len - i);
+}
+
+static void fn_out_consume(void *priv, char *line, unsigned long len)
+{
+ int i;
+ int color;
+ struct emit_callback *ecbdata = priv;
+ const char *set = diff_get_color(ecbdata->color_diff, DIFF_METAINFO);
+ const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET);
+
+ if (ecbdata->label_path[0]) {
+ printf("%s--- %s%s\n", set, ecbdata->label_path[0], reset);
+ printf("%s+++ %s%s\n", set, ecbdata->label_path[1], reset);
+ ecbdata->label_path[0] = ecbdata->label_path[1] = NULL;
+ }
+
+ /* This is not really necessary for now because
+ * this codepath only deals with two-way diffs.
+ */
+ for (i = 0; i < len && line[i] == '@'; i++)
+ ;
+ if (2 <= i && i < len && line[i] == ' ') {
+ ecbdata->nparents = i - 1;
+ emit_line(diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO),
+ reset, line, len);
+ return;
+ }
+
+ if (len < ecbdata->nparents) {
+ set = reset;
+ emit_line(reset, reset, line, len);
+ return;
+ }
+
+ color = DIFF_PLAIN;
+ if (ecbdata->diff_words && ecbdata->nparents != 1)
+ /* fall back to normal diff */
+ free_diff_words_data(ecbdata);
+ if (ecbdata->diff_words) {
+ if (line[0] == '-') {
+ diff_words_append(line, len,
+ &ecbdata->diff_words->minus);
+ return;
+ } else if (line[0] == '+') {
+ diff_words_append(line, len,
+ &ecbdata->diff_words->plus);
+ return;
+ }
+ if (ecbdata->diff_words->minus.text.size ||
+ ecbdata->diff_words->plus.text.size)
+ diff_words_show(ecbdata->diff_words);
+ line++;
+ len--;
+ emit_line(set, reset, line, len);
+ return;
+ }
+ for (i = 0; i < ecbdata->nparents && len; i++) {
+ if (line[i] == '-')
+ color = DIFF_FILE_OLD;
+ else if (line[i] == '+')
+ color = DIFF_FILE_NEW;
+ }
+
+ if (color != DIFF_FILE_NEW) {
+ emit_line(diff_get_color(ecbdata->color_diff, color),
+ reset, line, len);
+ return;
+ }
+ emit_add_line(reset, ecbdata, line, len);
+}
+
+static char *pprint_rename(const char *a, const char *b)
+{
+ const char *old = a;
+ const char *new = b;
+ char *name = NULL;
+ int pfx_length, sfx_length;
+ int len_a = strlen(a);
+ int len_b = strlen(b);
+
+ /* Find common prefix */
+ pfx_length = 0;
+ while (*old && *new && *old == *new) {
+ if (*old == '/')
+ pfx_length = old - a + 1;
+ old++;
+ new++;
+ }
+
+ /* Find common suffix */
+ old = a + len_a;
+ new = b + len_b;
+ sfx_length = 0;
+ while (a <= old && b <= new && *old == *new) {
+ if (*old == '/')
+ sfx_length = len_a - (old - a);
+ old--;
+ new--;
+ }
+
+ /*
+ * pfx{mid-a => mid-b}sfx
+ * {pfx-a => pfx-b}sfx
+ * pfx{sfx-a => sfx-b}
+ * name-a => name-b
+ */
+ if (pfx_length + sfx_length) {
+ int a_midlen = len_a - pfx_length - sfx_length;
+ int b_midlen = len_b - pfx_length - sfx_length;
+ if (a_midlen < 0) a_midlen = 0;
+ if (b_midlen < 0) b_midlen = 0;
+
+ name = xmalloc(pfx_length + a_midlen + b_midlen + sfx_length + 7);
+ sprintf(name, "%.*s{%.*s => %.*s}%s",
+ pfx_length, a,
+ a_midlen, a + pfx_length,
+ b_midlen, b + pfx_length,
+ a + len_a - sfx_length);
+ }
+ else {
+ name = xmalloc(len_a + len_b + 5);
+ sprintf(name, "%s => %s", a, b);
+ }
+ return name;
+}
+
+struct diffstat_t {
+ struct xdiff_emit_state xm;
+
+ int nr;
+ int alloc;
+ struct diffstat_file {
+ char *name;
+ unsigned is_unmerged:1;
+ unsigned is_binary:1;
+ unsigned is_renamed:1;
+ unsigned int added, deleted;
+ } **files;
+};
+
+static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat,
+ const char *name_a,
+ const char *name_b)
+{
+ struct diffstat_file *x;
+ x = xcalloc(sizeof (*x), 1);
+ if (diffstat->nr == diffstat->alloc) {
+ diffstat->alloc = alloc_nr(diffstat->alloc);
+ diffstat->files = xrealloc(diffstat->files,
+ diffstat->alloc * sizeof(x));
+ }
+ diffstat->files[diffstat->nr++] = x;
+ if (name_b) {
+ x->name = pprint_rename(name_a, name_b);
+ x->is_renamed = 1;
+ }
+ else
+ x->name = xstrdup(name_a);
+ return x;
+}
+
+static void diffstat_consume(void *priv, char *line, unsigned long len)
+{
+ struct diffstat_t *diffstat = priv;
+ struct diffstat_file *x = diffstat->files[diffstat->nr - 1];
+
+ if (line[0] == '+')
+ x->added++;
+ else if (line[0] == '-')
+ x->deleted++;
+}
+
+const char mime_boundary_leader[] = "------------";
+
+static int scale_linear(int it, int width, int max_change)
+{
/*
- * Default values above are meant to match the
- * Linux kernel development style. Examples of
- * alternative styles you can specify via environment
- * variables are:
+ * make sure that at least one '-' is printed if there were deletions,
+ * and likewise for '+'.
+ */
+ if (max_change < 2)
+ return it;
+ return ((it - 1) * (width - 1) + max_change - 1) / (max_change - 1);
+}
+
+static void show_name(const char *prefix, const char *name, int len,
+ const char *reset, const char *set)
+{
+ printf(" %s%s%-*s%s |", set, prefix, len, name, reset);
+}
+
+static void show_graph(char ch, int cnt, const char *set, const char *reset)
+{
+ if (cnt <= 0)
+ return;
+ printf("%s", set);
+ while (cnt--)
+ putchar(ch);
+ printf("%s", reset);
+}
+
+static void show_stats(struct diffstat_t* data, struct diff_options *options)
+{
+ int i, len, add, del, total, adds = 0, dels = 0;
+ int max_change = 0, max_len = 0;
+ int total_files = data->nr;
+ int width, name_width;
+ const char *reset, *set, *add_c, *del_c;
+
+ if (data->nr == 0)
+ return;
+
+ width = options->stat_width ? options->stat_width : 80;
+ name_width = options->stat_name_width ? options->stat_name_width : 50;
+
+ /* Sanity: give at least 5 columns to the graph,
+ * but leave at least 10 columns for the name.
+ */
+ if (width < name_width + 15) {
+ if (name_width <= 25)
+ width = name_width + 15;
+ else
+ name_width = width - 15;
+ }
+
+ /* Find the longest filename and max number of changes */
+ reset = diff_get_color(options->color_diff, DIFF_RESET);
+ set = diff_get_color(options->color_diff, DIFF_PLAIN);
+ add_c = diff_get_color(options->color_diff, DIFF_FILE_NEW);
+ del_c = diff_get_color(options->color_diff, DIFF_FILE_OLD);
+
+ for (i = 0; i < data->nr; i++) {
+ struct diffstat_file *file = data->files[i];
+ int change = file->added + file->deleted;
+
+ len = quote_c_style(file->name, NULL, NULL, 0);
+ if (len) {
+ char *qname = xmalloc(len + 1);
+ quote_c_style(file->name, qname, NULL, 0);
+ free(file->name);
+ file->name = qname;
+ }
+
+ len = strlen(file->name);
+ if (max_len < len)
+ max_len = len;
+
+ if (file->is_binary || file->is_unmerged)
+ continue;
+ if (max_change < change)
+ max_change = change;
+ }
+
+ /* Compute the width of the graph part;
+ * 10 is for one blank at the beginning of the line plus
+ * " | count " between the name and the graph.
*
- * GIT_DIFF_OPTS="-c";
+ * From here on, name_width is the width of the name area,
+ * and width is the width of the graph area.
*/
- if (gitenv("GIT_EXTERNAL_DIFF"))
- external_diff_cmd = gitenv("GIT_EXTERNAL_DIFF");
+ name_width = (name_width < max_len) ? name_width : max_len;
+ if (width < (name_width + 10) + max_change)
+ width = width - (name_width + 10);
+ else
+ width = max_change;
+
+ for (i = 0; i < data->nr; i++) {
+ const char *prefix = "";
+ char *name = data->files[i]->name;
+ int added = data->files[i]->added;
+ int deleted = data->files[i]->deleted;
+ int name_len;
- /* In case external diff fails... */
- diff_opts = gitenv("GIT_DIFF_OPTS") ? : diff_opts;
+ /*
+ * "scale" the filename
+ */
+ len = name_width;
+ name_len = strlen(name);
+ if (name_width < name_len) {
+ char *slash;
+ prefix = "...";
+ len -= 3;
+ name += name_len - len;
+ slash = strchr(name, '/');
+ if (slash)
+ name = slash;
+ }
- done_preparing = 1;
- return external_diff_cmd;
+ if (data->files[i]->is_binary) {
+ show_name(prefix, name, len, reset, set);
+ printf(" Bin\n");
+ goto free_diffstat_file;
+ }
+ else if (data->files[i]->is_unmerged) {
+ show_name(prefix, name, len, reset, set);
+ printf(" Unmerged\n");
+ goto free_diffstat_file;
+ }
+ else if (!data->files[i]->is_renamed &&
+ (added + deleted == 0)) {
+ total_files--;
+ goto free_diffstat_file;
+ }
+
+ /*
+ * scale the add/delete
+ */
+ add = added;
+ del = deleted;
+ total = add + del;
+ adds += add;
+ dels += del;
+
+ if (width <= max_change) {
+ add = scale_linear(add, width, max_change);
+ del = scale_linear(del, width, max_change);
+ total = add + del;
+ }
+ show_name(prefix, name, len, reset, set);
+ printf("%5d ", added + deleted);
+ show_graph('+', add, add_c, reset);
+ show_graph('-', del, del_c, reset);
+ putchar('\n');
+ free_diffstat_file:
+ free(data->files[i]->name);
+ free(data->files[i]);
+ }
+ free(data->files);
+ printf("%s %d files changed, %d insertions(+), %d deletions(-)%s\n",
+ set, total_files, adds, dels, reset);
}
-/* Help to copy the thing properly quoted for the shell safety.
- * any single quote is replaced with '\'', and the caller is
- * expected to enclose the result within a single quote pair.
- *
- * E.g.
- * original sq_expand result
- * name ==> name ==> 'name'
- * a b ==> a b ==> 'a b'
- * a'b ==> a'\''b ==> 'a'\''b'
- */
-static char *sq_expand(const char *src)
-{
- static char *buf = NULL;
- int cnt, c;
- const char *cp;
- char *bp;
-
- /* count bytes needed to store the quoted string. */
- for (cnt = 1, cp = src; *cp; cnt++, cp++)
- if (*cp == '\'')
- cnt += 3;
-
- buf = xmalloc(cnt);
- bp = buf;
- while ((c = *src++)) {
- if (c != '\'')
- *bp++ = c;
- else {
- bp = strcpy(bp, "'\\''");
- bp += 4;
+struct checkdiff_t {
+ struct xdiff_emit_state xm;
+ const char *filename;
+ int lineno;
+};
+
+static void checkdiff_consume(void *priv, char *line, unsigned long len)
+{
+ struct checkdiff_t *data = priv;
+
+ if (line[0] == '+') {
+ int i, spaces = 0;
+
+ data->lineno++;
+
+ /* check space before tab */
+ for (i = 1; i < len && (line[i] == ' ' || line[i] == '\t'); i++)
+ if (line[i] == ' ')
+ spaces++;
+ if (line[i - 1] == '\t' && spaces)
+ printf("%s:%d: space before tab:%.*s\n",
+ data->filename, data->lineno, (int)len, line);
+
+ /* check white space at line end */
+ if (line[len - 1] == '\n')
+ len--;
+ if (isspace(line[len - 1]))
+ printf("%s:%d: white space at end: %.*s\n",
+ data->filename, data->lineno, (int)len, line);
+ } else if (line[0] == ' ')
+ data->lineno++;
+ else if (line[0] == '@') {
+ char *plus = strchr(line, '+');
+ if (plus)
+ data->lineno = strtol(plus, NULL, 10);
+ else
+ die("invalid diff");
+ }
+}
+
+static unsigned char *deflate_it(char *data,
+ unsigned long size,
+ unsigned long *result_size)
+{
+ int bound;
+ unsigned char *deflated;
+ z_stream stream;
+
+ memset(&stream, 0, sizeof(stream));
+ deflateInit(&stream, zlib_compression_level);
+ bound = deflateBound(&stream, size);
+ deflated = xmalloc(bound);
+ stream.next_out = deflated;
+ stream.avail_out = bound;
+
+ stream.next_in = (unsigned char *)data;
+ stream.avail_in = size;
+ while (deflate(&stream, Z_FINISH) == Z_OK)
+ ; /* nothing */
+ deflateEnd(&stream);
+ *result_size = stream.total_out;
+ return deflated;
+}
+
+static void emit_binary_diff_body(mmfile_t *one, mmfile_t *two)
+{
+ void *cp;
+ void *delta;
+ void *deflated;
+ void *data;
+ unsigned long orig_size;
+ unsigned long delta_size;
+ unsigned long deflate_size;
+ unsigned long data_size;
+
+ /* We could do deflated delta, or we could do just deflated two,
+ * whichever is smaller.
+ */
+ delta = NULL;
+ deflated = deflate_it(two->ptr, two->size, &deflate_size);
+ if (one->size && two->size) {
+ delta = diff_delta(one->ptr, one->size,
+ two->ptr, two->size,
+ &delta_size, deflate_size);
+ if (delta) {
+ void *to_free = delta;
+ orig_size = delta_size;
+ delta = deflate_it(delta, delta_size, &delta_size);
+ free(to_free);
}
}
- *bp = 0;
- return buf;
+
+ if (delta && delta_size < deflate_size) {
+ printf("delta %lu\n", orig_size);
+ free(deflated);
+ data = delta;
+ data_size = delta_size;
+ }
+ else {
+ printf("literal %lu\n", two->size);
+ free(delta);
+ data = deflated;
+ data_size = deflate_size;
+ }
+
+ /* emit data encoded in base85 */
+ cp = data;
+ while (data_size) {
+ int bytes = (52 < data_size) ? 52 : data_size;
+ char line[70];
+ data_size -= bytes;
+ if (bytes <= 26)
+ line[0] = bytes + 'A' - 1;
+ else
+ line[0] = bytes - 26 + 'a' - 1;
+ encode_85(line + 1, cp, bytes);
+ cp = (char *) cp + bytes;
+ puts(line);
+ }
+ printf("\n");
+ free(data);
}
-static struct diff_tempfile {
- const char *name;
- char hex[41];
- char mode[10];
- char tmp_path[50];
-} diff_temp[2];
+static void emit_binary_diff(mmfile_t *one, mmfile_t *two)
+{
+ printf("GIT binary patch\n");
+ emit_binary_diff_body(one, two);
+ emit_binary_diff_body(two, one);
+}
+
+#define FIRST_FEW_BYTES 8000
+static int mmfile_is_binary(mmfile_t *mf)
+{
+ long sz = mf->size;
+ if (FIRST_FEW_BYTES < sz)
+ sz = FIRST_FEW_BYTES;
+ return !!memchr(mf->ptr, 0, sz);
+}
+
+static void builtin_diff(const char *name_a,
+ const char *name_b,
+ struct diff_filespec *one,
+ struct diff_filespec *two,
+ const char *xfrm_msg,
+ struct diff_options *o,
+ int complete_rewrite)
+{
+ mmfile_t mf1, mf2;
+ const char *lbl[2];
+ char *a_one, *b_two;
+ const char *set = diff_get_color(o->color_diff, DIFF_METAINFO);
+ const char *reset = diff_get_color(o->color_diff, DIFF_RESET);
+
+ a_one = quote_two("a/", name_a);
+ b_two = quote_two("b/", name_b);
+ lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null";
+ lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null";
+ printf("%sdiff --git %s %s%s\n", set, a_one, b_two, reset);
+ if (lbl[0][0] == '/') {
+ /* /dev/null */
+ printf("%snew file mode %06o%s\n", set, two->mode, reset);
+ if (xfrm_msg && xfrm_msg[0])
+ printf("%s%s%s\n", set, xfrm_msg, reset);
+ }
+ else if (lbl[1][0] == '/') {
+ printf("%sdeleted file mode %06o%s\n", set, one->mode, reset);
+ if (xfrm_msg && xfrm_msg[0])
+ printf("%s%s%s\n", set, xfrm_msg, reset);
+ }
+ else {
+ if (one->mode != two->mode) {
+ printf("%sold mode %06o%s\n", set, one->mode, reset);
+ printf("%snew mode %06o%s\n", set, two->mode, reset);
+ }
+ if (xfrm_msg && xfrm_msg[0])
+ printf("%s%s%s\n", set, xfrm_msg, reset);
+ /*
+ * we do not run diff between different kind
+ * of objects.
+ */
+ if ((one->mode ^ two->mode) & S_IFMT)
+ goto free_ab_and_return;
+ if (complete_rewrite) {
+ emit_rewrite_diff(name_a, name_b, one, two);
+ goto free_ab_and_return;
+ }
+ }
+
+ if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
+ die("unable to read files to diff");
+
+ if (!o->text && (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2))) {
+ /* Quite common confusing case */
+ if (mf1.size == mf2.size &&
+ !memcmp(mf1.ptr, mf2.ptr, mf1.size))
+ goto free_ab_and_return;
+ if (o->binary)
+ emit_binary_diff(&mf1, &mf2);
+ else
+ printf("Binary files %s and %s differ\n",
+ lbl[0], lbl[1]);
+ }
+ else {
+ /* Crazy xdl interfaces.. */
+ const char *diffopts = getenv("GIT_DIFF_OPTS");
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+ xdemitcb_t ecb;
+ struct emit_callback ecbdata;
+
+ memset(&ecbdata, 0, sizeof(ecbdata));
+ ecbdata.label_path = lbl;
+ ecbdata.color_diff = o->color_diff;
+ xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts;
+ xecfg.ctxlen = o->context;
+ xecfg.flags = XDL_EMIT_FUNCNAMES;
+ if (!diffopts)
+ ;
+ else if (!strncmp(diffopts, "--unified=", 10))
+ xecfg.ctxlen = strtoul(diffopts + 10, NULL, 10);
+ else if (!strncmp(diffopts, "-u", 2))
+ xecfg.ctxlen = strtoul(diffopts + 2, NULL, 10);
+ ecb.outf = xdiff_outf;
+ ecb.priv = &ecbdata;
+ ecbdata.xm.consume = fn_out_consume;
+ if (o->color_diff_words)
+ ecbdata.diff_words =
+ xcalloc(1, sizeof(struct diff_words_data));
+ xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+ if (o->color_diff_words)
+ free_diff_words_data(&ecbdata);
+ }
+
+ free_ab_and_return:
+ free(a_one);
+ free(b_two);
+ return;
+}
+
+static void builtin_diffstat(const char *name_a, const char *name_b,
+ struct diff_filespec *one,
+ struct diff_filespec *two,
+ struct diffstat_t *diffstat,
+ struct diff_options *o,
+ int complete_rewrite)
+{
+ mmfile_t mf1, mf2;
+ struct diffstat_file *data;
+
+ data = diffstat_add(diffstat, name_a, name_b);
+
+ if (!one || !two) {
+ data->is_unmerged = 1;
+ return;
+ }
+ if (complete_rewrite) {
+ diff_populate_filespec(one, 0);
+ diff_populate_filespec(two, 0);
+ data->deleted = count_lines(one->data, one->size);
+ data->added = count_lines(two->data, two->size);
+ return;
+ }
+ if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
+ die("unable to read files to diff");
+
+ if (mmfile_is_binary(&mf1) || mmfile_is_binary(&mf2))
+ data->is_binary = 1;
+ else {
+ /* Crazy xdl interfaces.. */
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+ xdemitcb_t ecb;
+
+ xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts;
+ xecfg.ctxlen = 0;
+ xecfg.flags = 0;
+ ecb.outf = xdiff_outf;
+ ecb.priv = diffstat;
+ xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
+ }
+}
+
+static void builtin_checkdiff(const char *name_a, const char *name_b,
+ struct diff_filespec *one,
+ struct diff_filespec *two)
+{
+ mmfile_t mf1, mf2;
+ struct checkdiff_t data;
+
+ if (!two)
+ return;
-struct diff_spec {
- unsigned char blob_sha1[20];
- unsigned short mode; /* file mode */
- unsigned sha1_valid : 1; /* if true, use blob_sha1 and trust mode;
- * if false, use the name and read from
- * the filesystem.
- */
- unsigned file_valid : 1; /* if false the file does not exist */
-};
+ memset(&data, 0, sizeof(data));
+ data.xm.consume = checkdiff_consume;
+ data.filename = name_b ? name_b : name_a;
+ data.lineno = 0;
-static void builtin_diff(const char *name_a,
- const char *name_b,
- struct diff_tempfile *temp,
- int rename_score)
-{
- int i, next_at, cmd_size;
- const char *diff_cmd = "diff -L'%s%s' -L'%s%s'";
- const char *diff_arg = "'%s' '%s'||:"; /* "||:" is to return 0 */
- const char *input_name_sq[2];
- const char *path0[2];
- const char *path1[2];
- const char *name_sq[2];
- char *cmd;
-
- name_sq[0] = sq_expand(name_a);
- name_sq[1] = sq_expand(name_b);
-
- /* diff_cmd and diff_arg have 6 %s in total which makes
- * the sum of these strings 12 bytes larger than required.
- * we use 2 spaces around diff-opts, and we need to count
- * terminating NUL, so we subtract 9 here.
- */
- cmd_size = (strlen(diff_cmd) + strlen(diff_opts) +
- strlen(diff_arg) - 9);
- for (i = 0; i < 2; i++) {
- input_name_sq[i] = sq_expand(temp[i].name);
- if (!strcmp(temp[i].name, "/dev/null")) {
- path0[i] = "/dev/null";
- path1[i] = "";
- } else {
- path0[i] = i ? "b/" : "a/";
- path1[i] = name_sq[i];
- }
- cmd_size += (strlen(path0[i]) + strlen(path1[i]) +
- strlen(input_name_sq[i]));
+ if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0)
+ die("unable to read files to diff");
+
+ if (mmfile_is_binary(&mf2))
+ return;
+ else {
+ /* Crazy xdl interfaces.. */
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+ xdemitcb_t ecb;
+
+ xpp.flags = XDF_NEED_MINIMAL;
+ xecfg.ctxlen = 0;
+ xecfg.flags = 0;
+ ecb.outf = xdiff_outf;
+ ecb.priv = &data;
+ xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
}
+}
- cmd = xmalloc(cmd_size);
+struct diff_filespec *alloc_filespec(const char *path)
+{
+ int namelen = strlen(path);
+ struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1);
- next_at = 0;
- next_at += snprintf(cmd+next_at, cmd_size-next_at,
- diff_cmd,
- path0[0], path1[0], path0[1], path1[1]);
- next_at += snprintf(cmd+next_at, cmd_size-next_at,
- " %s ", diff_opts);
- next_at += snprintf(cmd+next_at, cmd_size-next_at,
- diff_arg, input_name_sq[0], input_name_sq[1]);
+ memset(spec, 0, sizeof(*spec));
+ spec->path = (char *)(spec + 1);
+ memcpy(spec->path, path, namelen+1);
+ return spec;
+}
- printf("diff --git a/%s b/%s\n", name_a, name_b);
- if (!path1[0][0])
- printf("new file mode %s\n", temp[1].mode);
- else if (!path1[1][0])
- printf("deleted file mode %s\n", temp[0].mode);
- else {
- if (strcmp(temp[0].mode, temp[1].mode)) {
- printf("old mode %s\n", temp[0].mode);
- printf("new mode %s\n", temp[1].mode);
- }
- if (strcmp(name_a, name_b)) {
- if (0 < rename_score)
- printf("rename similarity index %d%%\n",
- (int)(0.5+
- rename_score*100.0/MAX_SCORE));
- printf("rename old %s\n", name_a);
- printf("rename new %s\n", name_b);
- }
- if (strncmp(temp[0].mode, temp[1].mode, 3))
- /* we do not run diff between different kind
- * of objects.
- */
- exit(0);
+void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1,
+ unsigned short mode)
+{
+ if (mode) {
+ spec->mode = canon_mode(mode);
+ hashcpy(spec->sha1, sha1);
+ spec->sha1_valid = !is_null_sha1(sha1);
}
- fflush(NULL);
- execlp("/bin/sh","sh", "-c", cmd, NULL);
}
/*
return 0;
ce = active_cache[pos];
if ((lstat(name, &st) < 0) ||
- !S_ISREG(st.st_mode) ||
- ce_match_stat(ce, &st) ||
- memcmp(sha1, ce->sha1, 20))
+ !S_ISREG(st.st_mode) || /* careful! */
+ ce_match_stat(ce, &st, 0) ||
+ hashcmp(sha1, ce->sha1))
return 0;
+ /* we return 1 only when we can stat, it is a regular file,
+ * stat information matches, and sha1 recorded in the cache
+ * matches. I.e. we know the file in the work tree really is
+ * the same as the <name, sha1> pair.
+ */
return 1;
}
+static struct sha1_size_cache {
+ unsigned char sha1[20];
+ unsigned long size;
+} **sha1_size_cache;
+static int sha1_size_cache_nr, sha1_size_cache_alloc;
+
+static struct sha1_size_cache *locate_size_cache(unsigned char *sha1,
+ int find_only,
+ unsigned long size)
+{
+ int first, last;
+ struct sha1_size_cache *e;
+
+ first = 0;
+ last = sha1_size_cache_nr;
+ while (last > first) {
+ int cmp, next = (last + first) >> 1;
+ e = sha1_size_cache[next];
+ cmp = hashcmp(e->sha1, sha1);
+ if (!cmp)
+ return e;
+ if (cmp < 0) {
+ last = next;
+ continue;
+ }
+ first = next+1;
+ }
+ /* not found */
+ if (find_only)
+ return NULL;
+ /* insert to make it at "first" */
+ if (sha1_size_cache_alloc <= sha1_size_cache_nr) {
+ sha1_size_cache_alloc = alloc_nr(sha1_size_cache_alloc);
+ sha1_size_cache = xrealloc(sha1_size_cache,
+ sha1_size_cache_alloc *
+ sizeof(*sha1_size_cache));
+ }
+ sha1_size_cache_nr++;
+ if (first < sha1_size_cache_nr)
+ memmove(sha1_size_cache + first + 1, sha1_size_cache + first,
+ (sha1_size_cache_nr - first - 1) *
+ sizeof(*sha1_size_cache));
+ e = xmalloc(sizeof(struct sha1_size_cache));
+ sha1_size_cache[first] = e;
+ hashcpy(e->sha1, sha1);
+ e->size = size;
+ return e;
+}
+
+/*
+ * While doing rename detection and pickaxe operation, we may need to
+ * grab the data for the blob (or file) for our own in-core comparison.
+ * diff_filespec has data and size fields for this purpose.
+ */
+int diff_populate_filespec(struct diff_filespec *s, int size_only)
+{
+ int err = 0;
+ if (!DIFF_FILE_VALID(s))
+ die("internal error: asking to populate invalid file.");
+ if (S_ISDIR(s->mode))
+ return -1;
+
+ if (!use_size_cache)
+ size_only = 0;
+
+ if (s->data)
+ return err;
+ if (!s->sha1_valid ||
+ work_tree_matches(s->path, s->sha1)) {
+ struct stat st;
+ int fd;
+ if (lstat(s->path, &st) < 0) {
+ if (errno == ENOENT) {
+ err_empty:
+ err = -1;
+ empty:
+ s->data = (char *)"";
+ s->size = 0;
+ return err;
+ }
+ }
+ s->size = st.st_size;
+ if (!s->size)
+ goto empty;
+ if (size_only)
+ return 0;
+ if (S_ISLNK(st.st_mode)) {
+ int ret;
+ s->data = xmalloc(s->size);
+ s->should_free = 1;
+ ret = readlink(s->path, s->data, s->size);
+ if (ret < 0) {
+ free(s->data);
+ goto err_empty;
+ }
+ return 0;
+ }
+ fd = open(s->path, O_RDONLY);
+ if (fd < 0)
+ goto err_empty;
+ s->data = mmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0);
+ close(fd);
+ if (s->data == MAP_FAILED)
+ goto err_empty;
+ s->should_munmap = 1;
+ }
+ else {
+ char type[20];
+ struct sha1_size_cache *e;
+
+ if (size_only) {
+ e = locate_size_cache(s->sha1, 1, 0);
+ if (e) {
+ s->size = e->size;
+ return 0;
+ }
+ if (!sha1_object_info(s->sha1, type, &s->size))
+ locate_size_cache(s->sha1, 0, s->size);
+ }
+ else {
+ s->data = read_sha1_file(s->sha1, type, &s->size);
+ s->should_free = 1;
+ }
+ }
+ return 0;
+}
+
+void diff_free_filespec_data(struct diff_filespec *s)
+{
+ if (s->should_free)
+ free(s->data);
+ else if (s->should_munmap)
+ munmap(s->data, s->size);
+ s->should_free = s->should_munmap = 0;
+ s->data = NULL;
+ free(s->cnt_data);
+ s->cnt_data = NULL;
+}
+
static void prep_temp_blob(struct diff_tempfile *temp,
void *blob,
unsigned long size,
- unsigned char *sha1,
+ const unsigned char *sha1,
int mode)
{
int fd;
- strcpy(temp->tmp_path, ".diff_XXXXXX");
- fd = mkstemp(temp->tmp_path);
+ fd = git_mkstemp(temp->tmp_path, TEMPFILE_PATH_LEN, ".diff_XXXXXX");
if (fd < 0)
die("unable to create temp-file");
if (write(fd, blob, size) != size)
static void prepare_temp_file(const char *name,
struct diff_tempfile *temp,
- struct diff_spec *one)
+ struct diff_filespec *one)
{
- if (!one->file_valid) {
+ if (!DIFF_FILE_VALID(one)) {
not_a_valid_file:
/* A '-' entry produces this for file-2, and
* a '+' entry produces this for file-1.
}
if (!one->sha1_valid ||
- work_tree_matches(name, one->blob_sha1)) {
+ work_tree_matches(name, one->sha1)) {
struct stat st;
- temp->name = name;
- if (lstat(temp->name, &st) < 0) {
+ if (lstat(name, &st) < 0) {
if (errno == ENOENT)
goto not_a_valid_file;
- die("stat(%s): %s", temp->name, strerror(errno));
+ die("stat(%s): %s", name, strerror(errno));
}
if (S_ISLNK(st.st_mode)) {
int ret;
- char *buf, buf_[1024];
- buf = ((sizeof(buf_) < st.st_size) ?
- xmalloc(st.st_size) : buf_);
+ char buf[PATH_MAX + 1]; /* ought to be SYMLINK_MAX */
+ if (sizeof(buf) <= st.st_size)
+ die("symlink too long: %s", name);
ret = readlink(name, buf, st.st_size);
if (ret < 0)
die("readlink(%s)", name);
prep_temp_blob(temp, buf, st.st_size,
(one->sha1_valid ?
- one->blob_sha1 : null_sha1),
+ one->sha1 : null_sha1),
(one->sha1_valid ?
one->mode : S_IFLNK));
}
else {
- if (!one->sha1_valid)
- strcpy(temp->hex, sha1_to_hex(null_sha1));
- else
- strcpy(temp->hex, sha1_to_hex(one->blob_sha1));
- sprintf(temp->mode, "%06o",
- S_IFREG |ce_permissions(st.st_mode));
+ /* we can borrow from the file in the work tree */
+ temp->name = name;
+ if (!one->sha1_valid)
+ strcpy(temp->hex, sha1_to_hex(null_sha1));
+ else
+ strcpy(temp->hex, sha1_to_hex(one->sha1));
+ /* Even though we may sometimes borrow the
+ * contents from the work tree, we always want
+ * one->mode. mode is trustworthy even when
+ * !(one->sha1_valid), as long as
+ * DIFF_FILE_VALID(one).
+ */
+ sprintf(temp->mode, "%06o", one->mode);
+ }
+ return;
+ }
+ else {
+ if (diff_populate_filespec(one, 0))
+ die("cannot read data blob for %s", one->path);
+ prep_temp_blob(temp, one->data, one->size,
+ one->sha1, one->mode);
+ }
+}
+
+static void remove_tempfile(void)
+{
+ int i;
+
+ for (i = 0; i < 2; i++)
+ if (diff_temp[i].name == diff_temp[i].tmp_path) {
+ unlink(diff_temp[i].name);
+ diff_temp[i].name = NULL;
+ }
+}
+
+static void remove_tempfile_on_signal(int signo)
+{
+ remove_tempfile();
+ signal(SIGINT, SIG_DFL);
+ raise(signo);
+}
+
+static int spawn_prog(const char *pgm, const char **arg)
+{
+ pid_t pid;
+ int status;
+
+ fflush(NULL);
+ pid = fork();
+ if (pid < 0)
+ die("unable to fork");
+ if (!pid) {
+ execvp(pgm, (char *const*) arg);
+ exit(255);
+ }
+
+ while (waitpid(pid, &status, 0) < 0) {
+ if (errno == EINTR)
+ continue;
+ return -1;
+ }
+
+ /* Earlier we did not check the exit status because
+ * diff exits non-zero if files are different, and
+ * we are not interested in knowing that. It was a
+ * mistake which made it harder to quit a diff-*
+ * session that uses the git-apply-patch-script as
+ * the GIT_EXTERNAL_DIFF. A custom GIT_EXTERNAL_DIFF
+ * should also exit non-zero only when it wants to
+ * abort the entire diff-* session.
+ */
+ if (WIFEXITED(status) && !WEXITSTATUS(status))
+ return 0;
+ return -1;
+}
+
+/* An external diff command takes:
+ *
+ * diff-cmd name infile1 infile1-sha1 infile1-mode \
+ * infile2 infile2-sha1 infile2-mode [ rename-to ]
+ *
+ */
+static void run_external_diff(const char *pgm,
+ const char *name,
+ const char *other,
+ struct diff_filespec *one,
+ struct diff_filespec *two,
+ const char *xfrm_msg,
+ int complete_rewrite)
+{
+ const char *spawn_arg[10];
+ struct diff_tempfile *temp = diff_temp;
+ int retval;
+ static int atexit_asked = 0;
+ const char *othername;
+ const char **arg = &spawn_arg[0];
+
+ othername = (other? other : name);
+ if (one && two) {
+ prepare_temp_file(name, &temp[0], one);
+ prepare_temp_file(othername, &temp[1], two);
+ if (! atexit_asked &&
+ (temp[0].name == temp[0].tmp_path ||
+ temp[1].name == temp[1].tmp_path)) {
+ atexit_asked = 1;
+ atexit(remove_tempfile);
+ }
+ signal(SIGINT, remove_tempfile_on_signal);
+ }
+
+ if (one && two) {
+ *arg++ = pgm;
+ *arg++ = name;
+ *arg++ = temp[0].name;
+ *arg++ = temp[0].hex;
+ *arg++ = temp[0].mode;
+ *arg++ = temp[1].name;
+ *arg++ = temp[1].hex;
+ *arg++ = temp[1].mode;
+ if (other) {
+ *arg++ = other;
+ *arg++ = xfrm_msg;
+ }
+ } else {
+ *arg++ = pgm;
+ *arg++ = name;
+ }
+ *arg = NULL;
+ retval = spawn_prog(pgm, spawn_arg);
+ remove_tempfile();
+ if (retval) {
+ fprintf(stderr, "external diff died, stopping at %s.\n", name);
+ exit(1);
+ }
+}
+
+static void run_diff_cmd(const char *pgm,
+ const char *name,
+ const char *other,
+ struct diff_filespec *one,
+ struct diff_filespec *two,
+ const char *xfrm_msg,
+ struct diff_options *o,
+ int complete_rewrite)
+{
+ if (pgm) {
+ run_external_diff(pgm, name, other, one, two, xfrm_msg,
+ complete_rewrite);
+ return;
+ }
+ if (one && two)
+ builtin_diff(name, other ? other : name,
+ one, two, xfrm_msg, o, complete_rewrite);
+ else
+ printf("* Unmerged path %s\n", name);
+}
+
+static void diff_fill_sha1_info(struct diff_filespec *one)
+{
+ if (DIFF_FILE_VALID(one)) {
+ if (!one->sha1_valid) {
+ struct stat st;
+ if (lstat(one->path, &st) < 0)
+ die("stat %s", one->path);
+ if (index_path(one->sha1, one->path, &st, 0))
+ die("cannot hash %s\n", one->path);
+ }
+ }
+ else
+ hashclr(one->sha1);
+}
+
+static void run_diff(struct diff_filepair *p, struct diff_options *o)
+{
+ const char *pgm = external_diff();
+ char msg[PATH_MAX*2+300], *xfrm_msg;
+ struct diff_filespec *one;
+ struct diff_filespec *two;
+ const char *name;
+ const char *other;
+ char *name_munged, *other_munged;
+ int complete_rewrite = 0;
+ int len;
+
+ if (DIFF_PAIR_UNMERGED(p)) {
+ /* unmerged */
+ run_diff_cmd(pgm, p->one->path, NULL, NULL, NULL, NULL, o, 0);
+ return;
+ }
+
+ name = p->one->path;
+ other = (strcmp(name, p->two->path) ? p->two->path : NULL);
+ name_munged = quote_one(name);
+ other_munged = quote_one(other);
+ one = p->one; two = p->two;
+
+ diff_fill_sha1_info(one);
+ diff_fill_sha1_info(two);
+
+ len = 0;
+ switch (p->status) {
+ case DIFF_STATUS_COPIED:
+ len += snprintf(msg + len, sizeof(msg) - len,
+ "similarity index %d%%\n"
+ "copy from %s\n"
+ "copy to %s\n",
+ (int)(0.5 + p->score * 100.0/MAX_SCORE),
+ name_munged, other_munged);
+ break;
+ case DIFF_STATUS_RENAMED:
+ len += snprintf(msg + len, sizeof(msg) - len,
+ "similarity index %d%%\n"
+ "rename from %s\n"
+ "rename to %s\n",
+ (int)(0.5 + p->score * 100.0/MAX_SCORE),
+ name_munged, other_munged);
+ break;
+ case DIFF_STATUS_MODIFIED:
+ if (p->score) {
+ len += snprintf(msg + len, sizeof(msg) - len,
+ "dissimilarity index %d%%\n",
+ (int)(0.5 + p->score *
+ 100.0/MAX_SCORE));
+ complete_rewrite = 1;
+ break;
+ }
+ /* fallthru */
+ default:
+ /* nothing */
+ ;
+ }
+
+ if (hashcmp(one->sha1, two->sha1)) {
+ int abbrev = o->full_index ? 40 : DEFAULT_ABBREV;
+
+ if (o->binary) {
+ mmfile_t mf;
+ if ((!fill_mmfile(&mf, one) && mmfile_is_binary(&mf)) ||
+ (!fill_mmfile(&mf, two) && mmfile_is_binary(&mf)))
+ abbrev = 40;
+ }
+ len += snprintf(msg + len, sizeof(msg) - len,
+ "index %.*s..%.*s",
+ abbrev, sha1_to_hex(one->sha1),
+ abbrev, sha1_to_hex(two->sha1));
+ if (one->mode == two->mode)
+ len += snprintf(msg + len, sizeof(msg) - len,
+ " %06o", one->mode);
+ len += snprintf(msg + len, sizeof(msg) - len, "\n");
+ }
+
+ if (len)
+ msg[--len] = 0;
+ xfrm_msg = len ? msg : NULL;
+
+ if (!pgm &&
+ DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) &&
+ (S_IFMT & one->mode) != (S_IFMT & two->mode)) {
+ /* a filepair that changes between file and symlink
+ * needs to be split into deletion and creation.
+ */
+ struct diff_filespec *null = alloc_filespec(two->path);
+ run_diff_cmd(NULL, name, other, one, null, xfrm_msg, o, 0);
+ free(null);
+ null = alloc_filespec(one->path);
+ run_diff_cmd(NULL, name, other, null, two, xfrm_msg, o, 0);
+ free(null);
+ }
+ else
+ run_diff_cmd(pgm, name, other, one, two, xfrm_msg, o,
+ complete_rewrite);
+
+ free(name_munged);
+ free(other_munged);
+}
+
+static void run_diffstat(struct diff_filepair *p, struct diff_options *o,
+ struct diffstat_t *diffstat)
+{
+ const char *name;
+ const char *other;
+ int complete_rewrite = 0;
+
+ if (DIFF_PAIR_UNMERGED(p)) {
+ /* unmerged */
+ builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, 0);
+ return;
+ }
+
+ name = p->one->path;
+ other = (strcmp(name, p->two->path) ? p->two->path : NULL);
+
+ diff_fill_sha1_info(p->one);
+ diff_fill_sha1_info(p->two);
+
+ if (p->status == DIFF_STATUS_MODIFIED && p->score)
+ complete_rewrite = 1;
+ builtin_diffstat(name, other, p->one, p->two, diffstat, o, complete_rewrite);
+}
+
+static void run_checkdiff(struct diff_filepair *p, struct diff_options *o)
+{
+ const char *name;
+ const char *other;
+
+ if (DIFF_PAIR_UNMERGED(p)) {
+ /* unmerged */
+ return;
+ }
+
+ name = p->one->path;
+ other = (strcmp(name, p->two->path) ? p->two->path : NULL);
+
+ diff_fill_sha1_info(p->one);
+ diff_fill_sha1_info(p->two);
+
+ builtin_checkdiff(name, other, p->one, p->two);
+}
+
+void diff_setup(struct diff_options *options)
+{
+ memset(options, 0, sizeof(*options));
+ options->line_termination = '\n';
+ options->break_opt = -1;
+ options->rename_limit = -1;
+ options->context = 3;
+ options->msg_sep = "";
+
+ options->change = diff_change;
+ options->add_remove = diff_addremove;
+ options->color_diff = diff_use_color_default;
+ options->detect_rename = diff_detect_rename_default;
+}
+
+int diff_setup_done(struct diff_options *options)
+{
+ int count = 0;
+
+ if (options->output_format & DIFF_FORMAT_NAME)
+ count++;
+ if (options->output_format & DIFF_FORMAT_NAME_STATUS)
+ count++;
+ if (options->output_format & DIFF_FORMAT_CHECKDIFF)
+ count++;
+ if (options->output_format & DIFF_FORMAT_NO_OUTPUT)
+ count++;
+ if (count > 1)
+ die("--name-only, --name-status, --check and -s are mutually exclusive");
+
+ if (options->find_copies_harder)
+ options->detect_rename = DIFF_DETECT_COPY;
+
+ if (options->output_format & (DIFF_FORMAT_NAME |
+ DIFF_FORMAT_NAME_STATUS |
+ DIFF_FORMAT_CHECKDIFF |
+ DIFF_FORMAT_NO_OUTPUT))
+ options->output_format &= ~(DIFF_FORMAT_RAW |
+ DIFF_FORMAT_DIFFSTAT |
+ DIFF_FORMAT_SUMMARY |
+ DIFF_FORMAT_PATCH);
+
+ /*
+ * These cases always need recursive; we do not drop caller-supplied
+ * recursive bits for other formats here.
+ */
+ if (options->output_format & (DIFF_FORMAT_PATCH |
+ DIFF_FORMAT_DIFFSTAT |
+ DIFF_FORMAT_CHECKDIFF))
+ options->recursive = 1;
+ /*
+ * Also pickaxe would not work very well if you do not say recursive
+ */
+ if (options->pickaxe)
+ options->recursive = 1;
+
+ if (options->detect_rename && options->rename_limit < 0)
+ options->rename_limit = diff_rename_limit_default;
+ if (options->setup & DIFF_SETUP_USE_CACHE) {
+ if (!active_cache)
+ /* read-cache does not die even when it fails
+ * so it is safe for us to do this here. Also
+ * it does not smudge active_cache or active_nr
+ * when it fails, so we do not have to worry about
+ * cleaning it up ourselves either.
+ */
+ read_cache();
+ }
+ if (options->setup & DIFF_SETUP_USE_SIZE_CACHE)
+ use_size_cache = 1;
+ if (options->abbrev <= 0 || 40 < options->abbrev)
+ options->abbrev = 40; /* full */
+
+ return 0;
+}
+
+static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val)
+{
+ char c, *eq;
+ int len;
+
+ if (*arg != '-')
+ return 0;
+ c = *++arg;
+ if (!c)
+ return 0;
+ if (c == arg_short) {
+ c = *++arg;
+ if (!c)
+ return 1;
+ if (val && isdigit(c)) {
+ char *end;
+ int n = strtoul(arg, &end, 10);
+ if (*end)
+ return 0;
+ *val = n;
+ return 1;
+ }
+ return 0;
+ }
+ if (c != '-')
+ return 0;
+ arg++;
+ eq = strchr(arg, '=');
+ if (eq)
+ len = eq - arg;
+ else
+ len = strlen(arg);
+ if (!len || strncmp(arg, arg_long, len))
+ return 0;
+ if (eq) {
+ int n;
+ char *end;
+ if (!isdigit(*++eq))
+ return 0;
+ n = strtoul(eq, &end, 10);
+ if (*end)
+ return 0;
+ *val = n;
+ }
+ return 1;
+}
+
+int diff_opt_parse(struct diff_options *options, const char **av, int ac)
+{
+ const char *arg = av[0];
+ if (!strcmp(arg, "-p") || !strcmp(arg, "-u"))
+ options->output_format |= DIFF_FORMAT_PATCH;
+ else if (opt_arg(arg, 'U', "unified", &options->context))
+ options->output_format |= DIFF_FORMAT_PATCH;
+ else if (!strcmp(arg, "--raw"))
+ options->output_format |= DIFF_FORMAT_RAW;
+ else if (!strcmp(arg, "--patch-with-raw")) {
+ options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_RAW;
+ }
+ else if (!strncmp(arg, "--stat", 6)) {
+ char *end;
+ int width = options->stat_width;
+ int name_width = options->stat_name_width;
+ arg += 6;
+ end = (char *)arg;
+
+ switch (*arg) {
+ case '-':
+ if (!strncmp(arg, "-width=", 7))
+ width = strtoul(arg + 7, &end, 10);
+ else if (!strncmp(arg, "-name-width=", 12))
+ name_width = strtoul(arg + 12, &end, 10);
+ break;
+ case '=':
+ width = strtoul(arg+1, &end, 10);
+ if (*end == ',')
+ name_width = strtoul(end+1, &end, 10);
+ }
+
+ /* Important! This checks all the error cases! */
+ if (*end)
+ return 0;
+ options->output_format |= DIFF_FORMAT_DIFFSTAT;
+ options->stat_name_width = name_width;
+ options->stat_width = width;
+ }
+ else if (!strcmp(arg, "--check"))
+ options->output_format |= DIFF_FORMAT_CHECKDIFF;
+ else if (!strcmp(arg, "--summary"))
+ options->output_format |= DIFF_FORMAT_SUMMARY;
+ else if (!strcmp(arg, "--patch-with-stat")) {
+ options->output_format |= DIFF_FORMAT_PATCH | DIFF_FORMAT_DIFFSTAT;
+ }
+ else if (!strcmp(arg, "-z"))
+ options->line_termination = 0;
+ else if (!strncmp(arg, "-l", 2))
+ options->rename_limit = strtoul(arg+2, NULL, 10);
+ else if (!strcmp(arg, "--full-index"))
+ options->full_index = 1;
+ else if (!strcmp(arg, "--binary")) {
+ options->output_format |= DIFF_FORMAT_PATCH;
+ options->binary = 1;
+ }
+ else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) {
+ options->text = 1;
+ }
+ else if (!strcmp(arg, "--name-only"))
+ options->output_format |= DIFF_FORMAT_NAME;
+ else if (!strcmp(arg, "--name-status"))
+ options->output_format |= DIFF_FORMAT_NAME_STATUS;
+ else if (!strcmp(arg, "-R"))
+ options->reverse_diff = 1;
+ else if (!strncmp(arg, "-S", 2))
+ options->pickaxe = arg + 2;
+ else if (!strcmp(arg, "-s")) {
+ options->output_format |= DIFF_FORMAT_NO_OUTPUT;
+ }
+ else if (!strncmp(arg, "-O", 2))
+ options->orderfile = arg + 2;
+ else if (!strncmp(arg, "--diff-filter=", 14))
+ options->filter = arg + 14;
+ else if (!strcmp(arg, "--pickaxe-all"))
+ options->pickaxe_opts = DIFF_PICKAXE_ALL;
+ else if (!strcmp(arg, "--pickaxe-regex"))
+ options->pickaxe_opts = DIFF_PICKAXE_REGEX;
+ else if (!strncmp(arg, "-B", 2)) {
+ if ((options->break_opt =
+ diff_scoreopt_parse(arg)) == -1)
+ return -1;
+ }
+ else if (!strncmp(arg, "-M", 2)) {
+ if ((options->rename_score =
+ diff_scoreopt_parse(arg)) == -1)
+ return -1;
+ options->detect_rename = DIFF_DETECT_RENAME;
+ }
+ else if (!strncmp(arg, "-C", 2)) {
+ if ((options->rename_score =
+ diff_scoreopt_parse(arg)) == -1)
+ return -1;
+ options->detect_rename = DIFF_DETECT_COPY;
+ }
+ else if (!strcmp(arg, "--find-copies-harder"))
+ options->find_copies_harder = 1;
+ else if (!strcmp(arg, "--abbrev"))
+ options->abbrev = DEFAULT_ABBREV;
+ else if (!strncmp(arg, "--abbrev=", 9)) {
+ options->abbrev = strtoul(arg + 9, NULL, 10);
+ if (options->abbrev < MINIMUM_ABBREV)
+ options->abbrev = MINIMUM_ABBREV;
+ else if (40 < options->abbrev)
+ options->abbrev = 40;
+ }
+ else if (!strcmp(arg, "--color"))
+ options->color_diff = 1;
+ else if (!strcmp(arg, "--no-color"))
+ options->color_diff = 0;
+ else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space"))
+ options->xdl_opts |= XDF_IGNORE_WHITESPACE;
+ else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change"))
+ options->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE;
+ else if (!strcmp(arg, "--color-words"))
+ options->color_diff = options->color_diff_words = 1;
+ else if (!strcmp(arg, "--no-renames"))
+ options->detect_rename = 0;
+ else
+ return 0;
+ return 1;
+}
+
+static int parse_num(const char **cp_p)
+{
+ unsigned long num, scale;
+ int ch, dot;
+ const char *cp = *cp_p;
+
+ num = 0;
+ scale = 1;
+ dot = 0;
+ for(;;) {
+ ch = *cp;
+ if ( !dot && ch == '.' ) {
+ scale = 1;
+ dot = 1;
+ } else if ( ch == '%' ) {
+ scale = dot ? scale*100 : 100;
+ cp++; /* % is always at the end */
+ break;
+ } else if ( ch >= '0' && ch <= '9' ) {
+ if ( scale < 100000 ) {
+ scale *= 10;
+ num = (num*10) + (ch-'0');
+ }
+ } else {
+ break;
+ }
+ cp++;
+ }
+ *cp_p = cp;
+
+ /* user says num divided by scale and we say internally that
+ * is MAX_SCORE * num / scale.
+ */
+ return (num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale);
+}
+
+int diff_scoreopt_parse(const char *opt)
+{
+ int opt1, opt2, cmd;
+
+ if (*opt++ != '-')
+ return -1;
+ cmd = *opt++;
+ if (cmd != 'M' && cmd != 'C' && cmd != 'B')
+ return -1; /* that is not a -M, -C nor -B option */
+
+ opt1 = parse_num(&opt);
+ if (cmd != 'B')
+ opt2 = 0;
+ else {
+ if (*opt == 0)
+ opt2 = 0;
+ else if (*opt != '/')
+ return -1; /* we expect -B80/99 or -B80 */
+ else {
+ opt++;
+ opt2 = parse_num(&opt);
}
- return;
}
- else {
- void *blob;
- char type[20];
- unsigned long size;
+ if (*opt != 0)
+ return -1;
+ return opt1 | (opt2 << 16);
+}
+
+struct diff_queue_struct diff_queued_diff;
- blob = read_sha1_file(one->blob_sha1, type, &size);
- if (!blob || strcmp(type, "blob"))
- die("unable to read blob object for %s (%s)",
- name, sha1_to_hex(one->blob_sha1));
- prep_temp_blob(temp, blob, size, one->blob_sha1, one->mode);
- free(blob);
+void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp)
+{
+ if (queue->alloc <= queue->nr) {
+ queue->alloc = alloc_nr(queue->alloc);
+ queue->queue = xrealloc(queue->queue,
+ sizeof(dp) * queue->alloc);
}
+ queue->queue[queue->nr++] = dp;
}
-static void remove_tempfile(void)
+struct diff_filepair *diff_queue(struct diff_queue_struct *queue,
+ struct diff_filespec *one,
+ struct diff_filespec *two)
{
- int i;
-
- for (i = 0; i < 2; i++)
- if (diff_temp[i].name == diff_temp[i].tmp_path) {
- unlink(diff_temp[i].name);
- diff_temp[i].name = NULL;
- }
+ struct diff_filepair *dp = xcalloc(1, sizeof(*dp));
+ dp->one = one;
+ dp->two = two;
+ if (queue)
+ diff_q(queue, dp);
+ return dp;
}
-static void remove_tempfile_on_signal(int signo)
+void diff_free_filepair(struct diff_filepair *p)
{
- remove_tempfile();
+ diff_free_filespec_data(p->one);
+ diff_free_filespec_data(p->two);
+ free(p->one);
+ free(p->two);
+ free(p);
}
-static int detect_rename;
-static int reverse_diff;
-static int diff_raw_output = -1;
-static const char **pathspec;
-static int speccnt;
-static int minimum_score;
-
-static int matches_pathspec(const char *name)
+/* This is different from find_unique_abbrev() in that
+ * it stuffs the result with dots for alignment.
+ */
+const char *diff_unique_abbrev(const unsigned char *sha1, int len)
{
- int i;
- int namelen;
+ int abblen;
+ const char *abbrev;
+ if (len == 40)
+ return sha1_to_hex(sha1);
+
+ abbrev = find_unique_abbrev(sha1, len);
+ if (!abbrev)
+ return sha1_to_hex(sha1);
+ abblen = strlen(abbrev);
+ if (abblen < 37) {
+ static char hex[41];
+ if (len < abblen && abblen <= len + 2)
+ sprintf(hex, "%s%.*s", abbrev, len+3-abblen, "..");
+ else
+ sprintf(hex, "%s...", abbrev);
+ return hex;
+ }
+ return sha1_to_hex(sha1);
+}
- if (speccnt == 0)
- return 1;
+static void diff_flush_raw(struct diff_filepair *p,
+ struct diff_options *options)
+{
+ int two_paths;
+ char status[10];
+ int abbrev = options->abbrev;
+ const char *path_one, *path_two;
+ int inter_name_termination = '\t';
+ int line_termination = options->line_termination;
+
+ if (!line_termination)
+ inter_name_termination = 0;
+
+ path_one = p->one->path;
+ path_two = p->two->path;
+ if (line_termination) {
+ path_one = quote_one(path_one);
+ path_two = quote_one(path_two);
+ }
- namelen = strlen(name);
- for (i = 0; i < speccnt; i++) {
- int speclen = strlen(pathspec[i]);
- if (! strncmp(pathspec[i], name, speclen) &&
- speclen <= namelen &&
- (name[speclen] == 0 || name[speclen] == '/'))
- return 1;
+ if (p->score)
+ sprintf(status, "%c%03d", p->status,
+ (int)(0.5 + p->score * 100.0/MAX_SCORE));
+ else {
+ status[0] = p->status;
+ status[1] = 0;
}
- return 0;
+ switch (p->status) {
+ case DIFF_STATUS_COPIED:
+ case DIFF_STATUS_RENAMED:
+ two_paths = 1;
+ break;
+ case DIFF_STATUS_ADDED:
+ case DIFF_STATUS_DELETED:
+ two_paths = 0;
+ break;
+ default:
+ two_paths = 0;
+ break;
+ }
+ if (!(options->output_format & DIFF_FORMAT_NAME_STATUS)) {
+ printf(":%06o %06o %s ",
+ p->one->mode, p->two->mode,
+ diff_unique_abbrev(p->one->sha1, abbrev));
+ printf("%s ",
+ diff_unique_abbrev(p->two->sha1, abbrev));
+ }
+ printf("%s%c%s", status, inter_name_termination, path_one);
+ if (two_paths)
+ printf("%c%s", inter_name_termination, path_two);
+ putchar(line_termination);
+ if (path_one != p->one->path)
+ free((void*)path_one);
+ if (path_two != p->two->path)
+ free((void*)path_two);
}
-/* An external diff command takes:
- *
- * diff-cmd name infile1 infile1-sha1 infile1-mode \
- * infile2 infile2-sha1 infile2-mode [ rename-to ]
- *
- */
-static void run_external_diff(const char *name,
- const char *other,
- struct diff_spec *one,
- struct diff_spec *two,
- int rename_score)
+static void diff_flush_name(struct diff_filepair *p, int line_termination)
{
- struct diff_tempfile *temp = diff_temp;
- pid_t pid;
- int status;
- static int atexit_asked = 0;
+ char *path = p->two->path;
- if (reverse_diff) {
- struct diff_spec *tmp_spec;
- tmp_spec = one; one = two; two = tmp_spec;
- if (other) {
- const char *tmp;
- tmp = name; name = other; other = tmp;
- }
- }
+ if (line_termination)
+ path = quote_one(p->two->path);
+ printf("%s%c", path, line_termination);
+ if (p->two->path != path)
+ free(path);
+}
- if (!matches_pathspec(name) && (!other || !matches_pathspec(other)))
- return;
+int diff_unmodified_pair(struct diff_filepair *p)
+{
+ /* This function is written stricter than necessary to support
+ * the currently implemented transformers, but the idea is to
+ * let transformers to produce diff_filepairs any way they want,
+ * and filter and clean them up here before producing the output.
+ */
+ struct diff_filespec *one, *two;
- if (one && two) {
- prepare_temp_file(name, &temp[0], one);
- prepare_temp_file(other ? : name, &temp[1], two);
- if (! atexit_asked &&
- (temp[0].name == temp[0].tmp_path ||
- temp[1].name == temp[1].tmp_path)) {
- atexit_asked = 1;
- atexit(remove_tempfile);
- }
- signal(SIGINT, remove_tempfile_on_signal);
- }
+ if (DIFF_PAIR_UNMERGED(p))
+ return 0; /* unmerged is interesting */
- fflush(NULL);
- pid = fork();
- if (pid < 0)
- die("unable to fork");
- if (!pid) {
- const char *pgm = external_diff();
- if (pgm) {
- if (one && two) {
- const char *exec_arg[9];
- const char **arg = &exec_arg[0];
- *arg++ = pgm;
- *arg++ = name;
- *arg++ = temp[0].name;
- *arg++ = temp[0].hex;
- *arg++ = temp[0].mode;
- *arg++ = temp[1].name;
- *arg++ = temp[1].hex;
- *arg++ = temp[1].mode;
- if (other)
- *arg++ = other;
- *arg = 0;
- execvp(pgm, (char *const*) exec_arg);
- }
- else
- execlp(pgm, pgm, name, NULL);
- }
- /*
- * otherwise we use the built-in one.
- */
- if (one && two)
- builtin_diff(name, other ? : name, temp, rename_score);
- else
- printf("* Unmerged path %s\n", name);
- exit(0);
- }
- if (waitpid(pid, &status, 0) < 0 ||
- !WIFEXITED(status) || WEXITSTATUS(status)) {
- /* Earlier we did not check the exit status because
- * diff exits non-zero if files are different, and
- * we are not interested in knowing that. It was a
- * mistake which made it harder to quit a diff-*
- * session that uses the git-apply-patch-script as
- * the GIT_EXTERNAL_DIFF. A custom GIT_EXTERNAL_DIFF
- * should also exit non-zero only when it wants to
- * abort the entire diff-* session.
- */
- remove_tempfile();
- fprintf(stderr, "external diff died, stopping at %s.\n", name);
- exit(1);
- }
- remove_tempfile();
+ one = p->one;
+ two = p->two;
+
+ /* deletion, addition, mode or type change
+ * and rename are all interesting.
+ */
+ if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) ||
+ DIFF_PAIR_MODE_CHANGED(p) ||
+ strcmp(one->path, two->path))
+ return 0;
+
+ /* both are valid and point at the same path. that is, we are
+ * dealing with a change.
+ */
+ if (one->sha1_valid && two->sha1_valid &&
+ !hashcmp(one->sha1, two->sha1))
+ return 1; /* no change */
+ if (!one->sha1_valid && !two->sha1_valid)
+ return 1; /* both look at the same file on the filesystem. */
+ return 0;
}
-/*
- * We do not detect circular renames. Just hold created and deleted
- * entries and later attempt to match them up. If they do not match,
- * then spit them out as deletes or creates as original.
- */
+static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o)
+{
+ if (diff_unmodified_pair(p))
+ return;
-static struct diff_spec_hold {
- struct diff_spec_hold *next;
- struct diff_spec it;
- unsigned long size;
- int flags;
-#define MATCHED 1
-#define SHOULD_FREE 2
-#define SHOULD_MUNMAP 4
- void *data;
- char path[1];
-} *createdfile, *deletedfile;
+ if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
+ (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
+ return; /* no tree diffs in patch format */
+
+ run_diff(p, o);
+}
-static void hold_diff(const char *name,
- struct diff_spec *one,
- struct diff_spec *two)
+static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o,
+ struct diffstat_t *diffstat)
{
- struct diff_spec_hold **list, *elem;
+ if (diff_unmodified_pair(p))
+ return;
- if (one->file_valid && two->file_valid)
- die("internal error");
+ if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
+ (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
+ return; /* no tree diffs in patch format */
- if (!detect_rename) {
- run_external_diff(name, NULL, one, two, -1);
+ run_diffstat(p, o, diffstat);
+}
+
+static void diff_flush_checkdiff(struct diff_filepair *p,
+ struct diff_options *o)
+{
+ if (diff_unmodified_pair(p))
return;
- }
- elem = xmalloc(sizeof(*elem) + strlen(name));
- strcpy(elem->path, name);
- elem->size = 0;
- elem->data = NULL;
- elem->flags = 0;
- if (one->file_valid) {
- list = &deletedfile;
- elem->it = *one;
- }
- else {
- list = &createdfile;
- elem->it = *two;
- }
- elem->next = *list;
- *list = elem;
+
+ if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
+ (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
+ return; /* no tree diffs in patch format */
+
+ run_checkdiff(p, o);
}
-static int populate_data(struct diff_spec_hold *s)
+int diff_queue_is_empty(void)
{
- char type[20];
+ struct diff_queue_struct *q = &diff_queued_diff;
+ int i;
+ for (i = 0; i < q->nr; i++)
+ if (!diff_unmodified_pair(q->queue[i]))
+ return 0;
+ return 1;
+}
- if (s->data)
- return 0;
- if (s->it.sha1_valid) {
- s->data = read_sha1_file(s->it.blob_sha1, type, &s->size);
- s->flags |= SHOULD_FREE;
- }
- else {
- struct stat st;
- int fd;
- fd = open(s->path, O_RDONLY);
- if (fd < 0)
- return -1;
- if (fstat(fd, &st)) {
- close(fd);
- return -1;
- }
- s->size = st.st_size;
- s->data = mmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0);
- close(fd);
- if (!s->size)
- s->data = "";
- else
- s->flags |= SHOULD_MUNMAP;
- }
- return 0;
+#if DIFF_DEBUG
+void diff_debug_filespec(struct diff_filespec *s, int x, const char *one)
+{
+ fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n",
+ x, one ? one : "",
+ s->path,
+ DIFF_FILE_VALID(s) ? "valid" : "invalid",
+ s->mode,
+ s->sha1_valid ? sha1_to_hex(s->sha1) : "");
+ fprintf(stderr, "queue[%d] %s size %lu flags %d\n",
+ x, one ? one : "",
+ s->size, s->xfrm_flags);
}
-static void free_data(struct diff_spec_hold *s)
+void diff_debug_filepair(const struct diff_filepair *p, int i)
{
- if (s->flags & SHOULD_FREE)
- free(s->data);
- else if (s->flags & SHOULD_MUNMAP)
- munmap(s->data, s->size);
- s->flags &= ~(SHOULD_FREE|SHOULD_MUNMAP);
- s->data = 0;
+ diff_debug_filespec(p->one, i, "one");
+ diff_debug_filespec(p->two, i, "two");
+ fprintf(stderr, "score %d, status %c stays %d broken %d\n",
+ p->score, p->status ? p->status : '?',
+ p->source_stays, p->broken_pair);
}
-static void flush_remaining_diff(struct diff_spec_hold *elem,
- int on_created_list)
+void diff_debug_queue(const char *msg, struct diff_queue_struct *q)
{
- static struct diff_spec null_file_spec;
+ int i;
+ if (msg)
+ fprintf(stderr, "%s\n", msg);
+ fprintf(stderr, "q->nr = %d\n", q->nr);
+ for (i = 0; i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+ diff_debug_filepair(p, i);
+ }
+}
+#endif
- null_file_spec.file_valid = 0;
- for ( ; elem ; elem = elem->next) {
- free_data(elem);
- if (elem->flags & MATCHED)
- continue;
- if (on_created_list)
- run_external_diff(elem->path, NULL,
- &null_file_spec, &elem->it, -1);
- else
- run_external_diff(elem->path, NULL,
- &elem->it, &null_file_spec, -1);
+static void diff_resolve_rename_copy(void)
+{
+ int i, j;
+ struct diff_filepair *p, *pp;
+ struct diff_queue_struct *q = &diff_queued_diff;
+
+ diff_debug_queue("resolve-rename-copy", q);
+
+ for (i = 0; i < q->nr; i++) {
+ p = q->queue[i];
+ p->status = 0; /* undecided */
+ if (DIFF_PAIR_UNMERGED(p))
+ p->status = DIFF_STATUS_UNMERGED;
+ else if (!DIFF_FILE_VALID(p->one))
+ p->status = DIFF_STATUS_ADDED;
+ else if (!DIFF_FILE_VALID(p->two))
+ p->status = DIFF_STATUS_DELETED;
+ else if (DIFF_PAIR_TYPE_CHANGED(p))
+ p->status = DIFF_STATUS_TYPE_CHANGED;
+
+ /* from this point on, we are dealing with a pair
+ * whose both sides are valid and of the same type, i.e.
+ * either in-place edit or rename/copy edit.
+ */
+ else if (DIFF_PAIR_RENAME(p)) {
+ if (p->source_stays) {
+ p->status = DIFF_STATUS_COPIED;
+ continue;
+ }
+ /* See if there is some other filepair that
+ * copies from the same source as us. If so
+ * we are a copy. Otherwise we are either a
+ * copy if the path stays, or a rename if it
+ * does not, but we already handled "stays" case.
+ */
+ for (j = i + 1; j < q->nr; j++) {
+ pp = q->queue[j];
+ if (strcmp(pp->one->path, p->one->path))
+ continue; /* not us */
+ if (!DIFF_PAIR_RENAME(pp))
+ continue; /* not a rename/copy */
+ /* pp is a rename/copy from the same source */
+ p->status = DIFF_STATUS_COPIED;
+ break;
+ }
+ if (!p->status)
+ p->status = DIFF_STATUS_RENAMED;
+ }
+ else if (hashcmp(p->one->sha1, p->two->sha1) ||
+ p->one->mode != p->two->mode)
+ p->status = DIFF_STATUS_MODIFIED;
+ else {
+ /* This is a "no-change" entry and should not
+ * happen anymore, but prepare for broken callers.
+ */
+ error("feeding unmodified %s to diffcore",
+ p->one->path);
+ p->status = DIFF_STATUS_UNKNOWN;
+ }
}
+ diff_debug_queue("resolve-rename-copy done", q);
}
-static int is_exact_match(struct diff_spec_hold *src,
- struct diff_spec_hold *dst)
+static int check_pair_status(struct diff_filepair *p)
{
- if (src->it.sha1_valid && dst->it.sha1_valid &&
- !memcmp(src->it.blob_sha1, dst->it.blob_sha1, 20))
- return 1;
- if (populate_data(src) || populate_data(dst))
- /* this is an error but will be caught downstream */
+ switch (p->status) {
+ case DIFF_STATUS_UNKNOWN:
return 0;
- if (src->size == dst->size &&
- !memcmp(src->data, dst->data, src->size))
+ case 0:
+ die("internal error in diff-resolve-rename-copy");
+ default:
return 1;
- return 0;
+ }
}
-int estimate_similarity(struct diff_spec_hold *src, struct diff_spec_hold *dst)
+static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt)
{
- /* src points at a deleted file and dst points at a created
- * file. They may be quite similar, in which case we want to
- * say src is renamed to dst.
- *
- * Compare them and return how similar they are, representing
- * the score as an integer between 0 and 10000, except
- * where they match exactly it is considered better than anything
- * else.
- */
- void *delta;
- unsigned long delta_size;
- int score;
-
- delta_size = ((src->size < dst->size) ?
- (dst->size - src->size) : (src->size - dst->size));
+ int fmt = opt->output_format;
+
+ if (fmt & DIFF_FORMAT_CHECKDIFF)
+ diff_flush_checkdiff(p, opt);
+ else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS))
+ diff_flush_raw(p, opt);
+ else if (fmt & DIFF_FORMAT_NAME)
+ diff_flush_name(p, opt->line_termination);
+}
- /* We would not consider rename followed by more than
- * minimum_score/MAX_SCORE edits; that is, delta_size must be smaller
- * than (src->size + dst->size)/2 * minimum_score/MAX_SCORE,
- * which means...
- */
+static void show_file_mode_name(const char *newdelete, struct diff_filespec *fs)
+{
+ if (fs->mode)
+ printf(" %s mode %06o %s\n", newdelete, fs->mode, fs->path);
+ else
+ printf(" %s %s\n", newdelete, fs->path);
+}
- if ((src->size+dst->size)*minimum_score < delta_size*MAX_SCORE*2)
- return 0;
- delta = diff_delta(src->data, src->size,
- dst->data, dst->size,
- &delta_size);
- free(delta);
+static void show_mode_change(struct diff_filepair *p, int show_name)
+{
+ if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) {
+ if (show_name)
+ printf(" mode change %06o => %06o %s\n",
+ p->one->mode, p->two->mode, p->two->path);
+ else
+ printf(" mode change %06o => %06o\n",
+ p->one->mode, p->two->mode);
+ }
+}
- /* This "delta" is really xdiff with adler32 and all the
- * overheads but it is a quick and dirty approximation.
- *
- * Now we will give some score to it. 100% edit gets
- * 0 points and 0% edit gets MAX_SCORE points. That is, every
- * 1/MAX_SCORE edit gets 1 point penalty. The amount of penalty is:
- *
- * (delta_size * 2 / (src->size + dst->size)) * MAX_SCORE
- *
+static void show_rename_copy(const char *renamecopy, struct diff_filepair *p)
+{
+ const char *old, *new;
+
+ /* Find common prefix */
+ old = p->one->path;
+ new = p->two->path;
+ while (1) {
+ const char *slash_old, *slash_new;
+ slash_old = strchr(old, '/');
+ slash_new = strchr(new, '/');
+ if (!slash_old ||
+ !slash_new ||
+ slash_old - old != slash_new - new ||
+ memcmp(old, new, slash_new - new))
+ break;
+ old = slash_old + 1;
+ new = slash_new + 1;
+ }
+ /* p->one->path thru old is the common prefix, and old and new
+ * through the end of names are renames
*/
- score = MAX_SCORE-(MAX_SCORE*2*delta_size/(src->size+dst->size));
- if (score < 0) return 0;
- if (MAX_SCORE < score) return MAX_SCORE;
- return score;
+ if (old != p->one->path)
+ printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
+ (int)(old - p->one->path), p->one->path,
+ old, new, (int)(0.5 + p->score * 100.0/MAX_SCORE));
+ else
+ printf(" %s %s => %s (%d%%)\n", renamecopy,
+ p->one->path, p->two->path,
+ (int)(0.5 + p->score * 100.0/MAX_SCORE));
+ show_mode_change(p, 0);
}
-struct diff_score {
- struct diff_spec_hold *src;
- struct diff_spec_hold *dst;
- int score;
+static void diff_summary(struct diff_filepair *p)
+{
+ switch(p->status) {
+ case DIFF_STATUS_DELETED:
+ show_file_mode_name("delete", p->one);
+ break;
+ case DIFF_STATUS_ADDED:
+ show_file_mode_name("create", p->two);
+ break;
+ case DIFF_STATUS_COPIED:
+ show_rename_copy("copy", p);
+ break;
+ case DIFF_STATUS_RENAMED:
+ show_rename_copy("rename", p);
+ break;
+ default:
+ if (p->score) {
+ printf(" rewrite %s (%d%%)\n", p->two->path,
+ (int)(0.5 + p->score * 100.0/MAX_SCORE));
+ show_mode_change(p, 0);
+ } else show_mode_change(p, 1);
+ break;
+ }
+}
+
+struct patch_id_t {
+ struct xdiff_emit_state xm;
+ SHA_CTX *ctx;
+ int patchlen;
};
-static int score_compare(const void *a_, const void *b_)
+static int remove_space(char *line, int len)
{
- const struct diff_score *a = a_, *b = b_;
- return b->score - a->score;
+ int i;
+ char *dst = line;
+ unsigned char c;
+
+ for (i = 0; i < len; i++)
+ if (!isspace((c = line[i])))
+ *dst++ = c;
+
+ return dst - line;
}
-static void flush_rename_pair(struct diff_spec_hold *src,
- struct diff_spec_hold *dst,
- int rename_score)
+static void patch_id_consume(void *priv, char *line, unsigned long len)
{
- src->flags |= MATCHED;
- dst->flags |= MATCHED;
- free_data(src);
- free_data(dst);
- run_external_diff(src->path, dst->path,
- &src->it, &dst->it, rename_score);
+ struct patch_id_t *data = priv;
+ int new_len;
+
+ /* Ignore line numbers when computing the SHA1 of the patch */
+ if (!strncmp(line, "@@ -", 4))
+ return;
+
+ new_len = remove_space(line, len);
+
+ SHA1_Update(data->ctx, line, new_len);
+ data->patchlen += new_len;
}
-static void free_held_diff(struct diff_spec_hold *list)
+/* returns 0 upon success, and writes result into sha1 */
+static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1)
{
- struct diff_spec_hold *h;
- for (h = list; list; list = h) {
- h = list->next;
- free_data(list);
- free(list);
+ struct diff_queue_struct *q = &diff_queued_diff;
+ int i;
+ SHA_CTX ctx;
+ struct patch_id_t data;
+ char buffer[PATH_MAX * 4 + 20];
+
+ SHA1_Init(&ctx);
+ memset(&data, 0, sizeof(struct patch_id_t));
+ data.ctx = &ctx;
+ data.xm.consume = patch_id_consume;
+
+ for (i = 0; i < q->nr; i++) {
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+ xdemitcb_t ecb;
+ mmfile_t mf1, mf2;
+ struct diff_filepair *p = q->queue[i];
+ int len1, len2;
+
+ if (p->status == 0)
+ return error("internal diff status error");
+ if (p->status == DIFF_STATUS_UNKNOWN)
+ continue;
+ if (diff_unmodified_pair(p))
+ continue;
+ if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) ||
+ (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
+ continue;
+ if (DIFF_PAIR_UNMERGED(p))
+ continue;
+
+ diff_fill_sha1_info(p->one);
+ diff_fill_sha1_info(p->two);
+ if (fill_mmfile(&mf1, p->one) < 0 ||
+ fill_mmfile(&mf2, p->two) < 0)
+ return error("unable to read files to diff");
+
+ /* Maybe hash p->two? into the patch id? */
+ if (mmfile_is_binary(&mf2))
+ continue;
+
+ len1 = remove_space(p->one->path, strlen(p->one->path));
+ len2 = remove_space(p->two->path, strlen(p->two->path));
+ if (p->one->mode == 0)
+ len1 = snprintf(buffer, sizeof(buffer),
+ "diff--gita/%.*sb/%.*s"
+ "newfilemode%06o"
+ "---/dev/null"
+ "+++b/%.*s",
+ len1, p->one->path,
+ len2, p->two->path,
+ p->two->mode,
+ len2, p->two->path);
+ else if (p->two->mode == 0)
+ len1 = snprintf(buffer, sizeof(buffer),
+ "diff--gita/%.*sb/%.*s"
+ "deletedfilemode%06o"
+ "---a/%.*s"
+ "+++/dev/null",
+ len1, p->one->path,
+ len2, p->two->path,
+ p->one->mode,
+ len1, p->one->path);
+ else
+ len1 = snprintf(buffer, sizeof(buffer),
+ "diff--gita/%.*sb/%.*s"
+ "---a/%.*s"
+ "+++b/%.*s",
+ len1, p->one->path,
+ len2, p->two->path,
+ len1, p->one->path,
+ len2, p->two->path);
+ SHA1_Update(&ctx, buffer, len1);
+
+ xpp.flags = XDF_NEED_MINIMAL;
+ xecfg.ctxlen = 3;
+ xecfg.flags = XDL_EMIT_FUNCNAMES;
+ ecb.outf = xdiff_outf;
+ ecb.priv = &data;
+ xdl_diff(&mf1, &mf2, &xpp, &xecfg, &ecb);
}
+
+ SHA1_Final(sha1, &ctx);
+ return 0;
+}
+
+int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1)
+{
+ struct diff_queue_struct *q = &diff_queued_diff;
+ int i;
+ int result = diff_get_patch_id(options, sha1);
+
+ for (i = 0; i < q->nr; i++)
+ diff_free_filepair(q->queue[i]);
+
+ free(q->queue);
+ q->queue = NULL;
+ q->nr = q->alloc = 0;
+
+ return result;
}
-void diff_flush(void)
+static int is_summary_empty(const struct diff_queue_struct *q)
{
- int num_create, num_delete, c, d;
- struct diff_spec_hold *elem, *src, *dst;
- struct diff_score *mx;
+ int i;
- /* We really want to cull the candidates list early
- * with cheap tests in order to avoid doing deltas.
- *
- * With the current callers, we should not have already
- * matched entries at this point, but it is nonetheless
- * checked for sanity.
- */
- for (dst = createdfile; dst; dst = dst->next) {
- if (dst->flags & MATCHED)
- continue;
- for (src = deletedfile; src; src = src->next) {
- if (src->flags & MATCHED)
- continue;
- if (! is_exact_match(src, dst))
- continue;
- flush_rename_pair(src, dst, MAX_SCORE);
+ for (i = 0; i < q->nr; i++) {
+ const struct diff_filepair *p = q->queue[i];
+
+ switch (p->status) {
+ case DIFF_STATUS_DELETED:
+ case DIFF_STATUS_ADDED:
+ case DIFF_STATUS_COPIED:
+ case DIFF_STATUS_RENAMED:
+ return 0;
+ default:
+ if (p->score)
+ return 0;
+ if (p->one->mode && p->two->mode &&
+ p->one->mode != p->two->mode)
+ return 0;
break;
}
}
+ return 1;
+}
- /* Count surviving candidates */
- for (num_create = 0, elem = createdfile; elem; elem = elem->next)
- if (!(elem->flags & MATCHED))
- num_create++;
+void diff_flush(struct diff_options *options)
+{
+ struct diff_queue_struct *q = &diff_queued_diff;
+ int i, output_format = options->output_format;
+ int separator = 0;
- for (num_delete = 0, elem = deletedfile; elem; elem = elem->next)
- if (!(elem->flags & MATCHED))
- num_delete++;
+ /*
+ * Order: raw, stat, summary, patch
+ * or: name/name-status/checkdiff (other bits clear)
+ */
+ if (!q->nr)
+ goto free_queue;
+
+ if (output_format & (DIFF_FORMAT_RAW |
+ DIFF_FORMAT_NAME |
+ DIFF_FORMAT_NAME_STATUS |
+ DIFF_FORMAT_CHECKDIFF)) {
+ for (i = 0; i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+ if (check_pair_status(p))
+ flush_one_pair(p, options);
+ }
+ separator++;
+ }
- if (num_create == 0 || num_delete == 0)
- goto exit_path;
+ if (output_format & DIFF_FORMAT_DIFFSTAT) {
+ struct diffstat_t diffstat;
- mx = xmalloc(sizeof(*mx) * num_create * num_delete);
- for (c = 0, dst = createdfile; dst; dst = dst->next) {
- int base = c * num_delete;
- if (dst->flags & MATCHED)
- continue;
- for (d = 0, src = deletedfile; src; src = src->next) {
- struct diff_score *m = &mx[base+d];
- if (src->flags & MATCHED)
- continue;
- m->src = src;
- m->dst = dst;
- m->score = estimate_similarity(src, dst);
- d++;
+ memset(&diffstat, 0, sizeof(struct diffstat_t));
+ diffstat.xm.consume = diffstat_consume;
+ for (i = 0; i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+ if (check_pair_status(p))
+ diff_flush_stat(p, options, &diffstat);
}
- c++;
+ show_stats(&diffstat, options);
+ separator++;
}
- qsort(mx, num_create*num_delete, sizeof(*mx), score_compare);
-#if 0
- for (c = 0; c < num_create * num_delete; c++) {
- src = mx[c].src;
- dst = mx[c].dst;
- if ((src->flags & MATCHED) || (dst->flags & MATCHED))
- continue;
- fprintf(stderr,
- "**score ** %d %s %s\n",
- mx[c].score, src->path, dst->path);
+ if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) {
+ for (i = 0; i < q->nr; i++)
+ diff_summary(q->queue[i]);
+ separator++;
}
-#endif
- for (c = 0; c < num_create * num_delete; c++) {
- src = mx[c].src;
- dst = mx[c].dst;
- if ((src->flags & MATCHED) || (dst->flags & MATCHED))
- continue;
- if (mx[c].score < minimum_score)
- break;
- flush_rename_pair(src, dst, mx[c].score);
+ if (output_format & DIFF_FORMAT_PATCH) {
+ if (separator) {
+ if (options->stat_sep) {
+ /* attach patch instead of inline */
+ fputs(options->stat_sep, stdout);
+ } else {
+ putchar(options->line_termination);
+ }
+ }
+
+ for (i = 0; i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+ if (check_pair_status(p))
+ diff_flush_patch(p, options);
+ }
}
- free(mx);
- exit_path:
- flush_remaining_diff(createdfile, 1);
- flush_remaining_diff(deletedfile, 0);
- free_held_diff(createdfile);
- free_held_diff(deletedfile);
- createdfile = deletedfile = NULL;
+ if (output_format & DIFF_FORMAT_CALLBACK)
+ options->format_callback(q, options, options->format_callback_data);
+
+ for (i = 0; i < q->nr; i++)
+ diff_free_filepair(q->queue[i]);
+free_queue:
+ free(q->queue);
+ q->queue = NULL;
+ q->nr = q->alloc = 0;
}
-int diff_scoreopt_parse(const char *opt)
+static void diffcore_apply_filter(const char *filter)
{
- int diglen, num, scale, i;
- if (opt[0] != '-' || opt[1] != 'M')
- return -1; /* that is not -M option */
- diglen = strspn(opt+2, "0123456789");
- if (diglen == 0 || strlen(opt+2) != diglen)
- return 0; /* use default */
- sscanf(opt+2, "%d", &num);
- for (i = 0, scale = 1; i < diglen; i++)
- scale *= 10;
+ int i;
+ struct diff_queue_struct *q = &diff_queued_diff;
+ struct diff_queue_struct outq;
+ outq.queue = NULL;
+ outq.nr = outq.alloc = 0;
- /* user says num divided by scale and we say internally that
- * is MAX_SCORE * num / scale.
- */
- return MAX_SCORE * num / scale;
+ if (!filter)
+ return;
+
+ if (strchr(filter, DIFF_STATUS_FILTER_AON)) {
+ int found;
+ for (i = found = 0; !found && i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+ if (((p->status == DIFF_STATUS_MODIFIED) &&
+ ((p->score &&
+ strchr(filter, DIFF_STATUS_FILTER_BROKEN)) ||
+ (!p->score &&
+ strchr(filter, DIFF_STATUS_MODIFIED)))) ||
+ ((p->status != DIFF_STATUS_MODIFIED) &&
+ strchr(filter, p->status)))
+ found++;
+ }
+ if (found)
+ return;
+
+ /* otherwise we will clear the whole queue
+ * by copying the empty outq at the end of this
+ * function, but first clear the current entries
+ * in the queue.
+ */
+ for (i = 0; i < q->nr; i++)
+ diff_free_filepair(q->queue[i]);
+ }
+ else {
+ /* Only the matching ones */
+ for (i = 0; i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+
+ if (((p->status == DIFF_STATUS_MODIFIED) &&
+ ((p->score &&
+ strchr(filter, DIFF_STATUS_FILTER_BROKEN)) ||
+ (!p->score &&
+ strchr(filter, DIFF_STATUS_MODIFIED)))) ||
+ ((p->status != DIFF_STATUS_MODIFIED) &&
+ strchr(filter, p->status)))
+ diff_q(&outq, p);
+ else
+ diff_free_filepair(p);
+ }
+ }
+ free(q->queue);
+ *q = outq;
}
-void diff_setup(int detect_rename_, int minimum_score_, int reverse_diff_,
- int diff_raw_output_,
- const char **pathspec_, int speccnt_)
+void diffcore_std(struct diff_options *options)
{
- free_held_diff(createdfile);
- free_held_diff(deletedfile);
- createdfile = deletedfile = NULL;
-
- detect_rename = detect_rename_;
- reverse_diff = reverse_diff_;
- pathspec = pathspec_;
- diff_raw_output = diff_raw_output_;
- speccnt = speccnt_;
- minimum_score = minimum_score_ ? : DEFAULT_MINIMUM_SCORE;
+ if (options->break_opt != -1)
+ diffcore_break(options->break_opt);
+ if (options->detect_rename)
+ diffcore_rename(options);
+ if (options->break_opt != -1)
+ diffcore_merge_broken();
+ if (options->pickaxe)
+ diffcore_pickaxe(options->pickaxe, options->pickaxe_opts);
+ if (options->orderfile)
+ diffcore_order(options->orderfile);
+ diff_resolve_rename_copy();
+ diffcore_apply_filter(options->filter);
}
-static const char *git_object_type(unsigned mode)
+
+void diffcore_std_no_resolve(struct diff_options *options)
{
- return S_ISDIR(mode) ? "tree" : "blob";
+ if (options->pickaxe)
+ diffcore_pickaxe(options->pickaxe, options->pickaxe_opts);
+ if (options->orderfile)
+ diffcore_order(options->orderfile);
+ diffcore_apply_filter(options->filter);
}
-void diff_addremove(int addremove, unsigned mode,
+void diff_addremove(struct diff_options *options,
+ int addremove, unsigned mode,
const unsigned char *sha1,
const char *base, const char *path)
{
char concatpath[PATH_MAX];
- struct diff_spec spec[2], *one, *two;
-
- if (0 <= diff_raw_output) {
- if (!path)
- path = "";
- if (reverse_diff)
- addremove = (addremove == '+' ? '-' : '+');
- printf("%c%06o %s %s %s%s%c",
- addremove,
- mode,
- git_object_type(mode), sha1_to_hex(sha1),
- base, path, diff_raw_output);
- return;
- }
- if (S_ISDIR(mode))
- return;
+ struct diff_filespec *one, *two;
+
+ /* This may look odd, but it is a preparation for
+ * feeding "there are unchanged files which should
+ * not produce diffs, but when you are doing copy
+ * detection you would need them, so here they are"
+ * entries to the diff-core. They will be prefixed
+ * with something like '=' or '*' (I haven't decided
+ * which but should not make any difference).
+ * Feeding the same new and old to diff_change()
+ * also has the same effect.
+ * Before the final output happens, they are pruned after
+ * merged into rename/copy pairs as appropriate.
+ */
+ if (options->reverse_diff)
+ addremove = (addremove == '+' ? '-' :
+ addremove == '-' ? '+' : addremove);
- memcpy(spec[0].blob_sha1, sha1, 20);
- spec[0].mode = mode;
- spec[0].sha1_valid = !!memcmp(sha1, null_sha1, 20);
- spec[0].file_valid = 1;
- spec[1].file_valid = 0;
+ if (!path) path = "";
+ sprintf(concatpath, "%s%s", base, path);
+ one = alloc_filespec(concatpath);
+ two = alloc_filespec(concatpath);
- if (addremove == '+') {
- one = spec + 1; two = spec;
- } else {
- one = spec; two = one + 1;
- }
+ if (addremove != '+')
+ fill_filespec(one, sha1, mode);
+ if (addremove != '-')
+ fill_filespec(two, sha1, mode);
- if (path) {
- strcpy(concatpath, base);
- strcat(concatpath, path);
- }
- hold_diff(path ? concatpath : base, one, two);
+ diff_queue(&diff_queued_diff, one, two);
}
-void diff_change(unsigned old_mode, unsigned new_mode,
+void diff_change(struct diff_options *options,
+ unsigned old_mode, unsigned new_mode,
const unsigned char *old_sha1,
const unsigned char *new_sha1,
- const char *base, const char *path) {
+ const char *base, const char *path)
+{
char concatpath[PATH_MAX];
- struct diff_spec spec[2];
-
- if (0 <= diff_raw_output) {
- char old_hex[41];
- strcpy(old_hex, sha1_to_hex(old_sha1));
-
- if (!path)
- path = "";
- if (reverse_diff)
- printf("*%06o->%06o %s %s->%s %s%s%c",
- new_mode, old_mode,
- git_object_type(new_mode),
- sha1_to_hex(new_sha1), old_hex,
- base, path, diff_raw_output);
- else
- printf("*%06o->%06o %s %s->%s %s%s%c",
- old_mode, new_mode,
- git_object_type(new_mode),
- old_hex, sha1_to_hex(new_sha1),
- base, path, diff_raw_output);
- return;
- }
- if (S_ISDIR(new_mode))
- return;
+ struct diff_filespec *one, *two;
- if (path) {
- strcpy(concatpath, base);
- strcat(concatpath, path);
+ if (options->reverse_diff) {
+ unsigned tmp;
+ const unsigned char *tmp_c;
+ tmp = old_mode; old_mode = new_mode; new_mode = tmp;
+ tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c;
}
-
- memcpy(spec[0].blob_sha1, old_sha1, 20);
- spec[0].mode = old_mode;
- memcpy(spec[1].blob_sha1, new_sha1, 20);
- spec[1].mode = new_mode;
- spec[0].sha1_valid = !!memcmp(old_sha1, null_sha1, 20);
- spec[1].sha1_valid = !!memcmp(new_sha1, null_sha1, 20);
- spec[1].file_valid = spec[0].file_valid = 1;
-
- /* We do not look at changed files as candidate for
- * rename detection ever.
- */
- run_external_diff(path ? concatpath : base, NULL,
- &spec[0], &spec[1], -1);
+ if (!path) path = "";
+ sprintf(concatpath, "%s%s", base, path);
+ one = alloc_filespec(concatpath);
+ two = alloc_filespec(concatpath);
+ fill_filespec(one, old_sha1, old_mode);
+ fill_filespec(two, new_sha1, new_mode);
+
+ diff_queue(&diff_queued_diff, one, two);
}
-void diff_unmerge(const char *path)
+void diff_unmerge(struct diff_options *options,
+ const char *path)
{
- if (0 <= diff_raw_output) {
- printf("U %s%c", path, diff_raw_output);
- return;
- }
- run_external_diff(path, NULL, NULL, NULL, -1);
+ struct diff_filespec *one, *two;
+ one = alloc_filespec(path);
+ two = alloc_filespec(path);
+ diff_queue(&diff_queued_diff, one, two);
}