#include <sys/wait.h>
#include <signal.h>
#include "cache.h"
+#include "quote.h"
#include "diff.h"
#include "diffcore.h"
static const char *diff_opts = "-pu";
-static unsigned char null_sha1[20] = { 0, };
-static int reverse_diff;
-static int generate_patch;
-static int line_termination = '\n';
-static int inter_name_termination = '\t';
+static int use_size_cache;
static const char *external_diff(void)
{
static const char *external_diff_cmd = NULL;
static int done_preparing = 0;
+ const char *env_diff_opts;
if (done_preparing)
return external_diff_cmd;
*
* GIT_DIFF_OPTS="-c";
*/
- if (gitenv("GIT_EXTERNAL_DIFF"))
- external_diff_cmd = gitenv("GIT_EXTERNAL_DIFF");
+ external_diff_cmd = getenv("GIT_EXTERNAL_DIFF");
/* In case external diff fails... */
- diff_opts = gitenv("GIT_DIFF_OPTS") ? : diff_opts;
+ env_diff_opts = getenv("GIT_DIFF_OPTS");
+ if (env_diff_opts) diff_opts = env_diff_opts;
done_preparing = 1;
return external_diff_cmd;
}
-/* 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;
- }
- }
- *bp = 0;
- return buf;
-}
+#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[50];
+ char tmp_path[TEMPFILE_PATH_LEN];
} diff_temp[2];
+static int count_lines(const char *filename)
+{
+ FILE *in;
+ int count, ch, completely_empty = 1, nl_just_seen = 0;
+ in = fopen(filename, "r");
+ count = 0;
+ while ((ch = fgetc(in)) != EOF)
+ if (ch == '\n') {
+ count++;
+ nl_just_seen = 1;
+ completely_empty = 0;
+ }
+ else {
+ nl_just_seen = 0;
+ completely_empty = 0;
+ }
+ fclose(in);
+ 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 *filename)
+{
+ FILE *in;
+ int ch, nl_just_seen = 1;
+ in = fopen(filename, "r");
+ while ((ch = fgetc(in)) != EOF) {
+ if (nl_just_seen)
+ putchar(prefix);
+ putchar(ch);
+ if (ch == '\n')
+ nl_just_seen = 1;
+ else
+ nl_just_seen = 0;
+ }
+ fclose(in);
+ 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_tempfile *temp)
+{
+ /* Use temp[i].name as input, name_a and name_b as labels */
+ int lc_a, lc_b;
+ lc_a = count_lines(temp[0].name);
+ lc_b = count_lines(temp[1].name);
+ printf("--- %s\n+++ %s\n@@ -", name_a, name_b);
+ print_line_count(lc_a);
+ printf(" +");
+ print_line_count(lc_b);
+ printf(" @@\n");
+ if (lc_a)
+ copy_file('-', temp[0].name);
+ if (lc_b)
+ copy_file('+', temp[1].name);
+}
+
static void builtin_diff(const char *name_a,
const char *name_b,
struct diff_tempfile *temp,
- const char *xfrm_msg)
+ const char *xfrm_msg,
+ int complete_rewrite)
{
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 *const diff_cmd = "diff -L%s%s -L%s%s";
+ const char *const 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);
+ name_sq[0] = sq_quote(name_a);
+ name_sq[1] = sq_quote(name_b);
/* diff_cmd and diff_arg have 6 %s in total which makes
* the sum of these strings 12 bytes larger than required.
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);
+ input_name_sq[i] = sq_quote(temp[i].name);
if (!strcmp(temp[i].name, "/dev/null")) {
path0[i] = "/dev/null";
path1[i] = "";
diff_arg, input_name_sq[0], input_name_sq[1]);
printf("diff --git a/%s b/%s\n", name_a, name_b);
- if (!path1[0][0])
+ if (!path1[0][0]) {
printf("new file mode %s\n", temp[1].mode);
- else if (!path1[1][0])
+ if (xfrm_msg && xfrm_msg[0])
+ puts(xfrm_msg);
+ }
+ else if (!path1[1][0]) {
printf("deleted file mode %s\n", temp[0].mode);
+ if (xfrm_msg && xfrm_msg[0])
+ puts(xfrm_msg);
+ }
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 (xfrm_msg && xfrm_msg[0])
- fputs(xfrm_msg, stdout);
-
+ puts(xfrm_msg);
if (strncmp(temp[0].mode, temp[1].mode, 3))
/* we do not run diff between different kind
* of objects.
*/
exit(0);
+ if (complete_rewrite) {
+ fflush(NULL);
+ emit_rewrite_diff(name_a, name_b, temp);
+ exit(0);
+ }
}
fflush(NULL);
execlp("/bin/sh","sh", "-c", cmd, NULL);
{
int namelen = strlen(path);
struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1);
+
+ memset(spec, 0, sizeof(*spec));
spec->path = (char *)(spec + 1);
- strcpy(spec->path, path);
- spec->should_free = spec->should_munmap = 0;
- spec->xfrm_flags = 0;
- spec->size = 0;
- spec->data = NULL;
- spec->mode = 0;
- memset(spec->sha1, 0, 20);
+ memcpy(spec->path, path, namelen+1);
return spec;
}
void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1,
unsigned short mode)
{
- if (mode) { /* just playing defensive */
- spec->mode = mode;
+ if (mode) {
+ spec->mode = DIFF_FILE_CANON_MODE(mode);
memcpy(spec->sha1, sha1, 20);
spec->sha1_valid = !!memcmp(sha1, null_sha1, 20);
}
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 = memcmp(e->sha1, sha1, 20);
+ 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;
+ memcpy(e->sha1, sha1, 20);
+ 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 diff_populate_filespec(struct diff_filespec *s, int size_only)
{
int err = 0;
if (!DIFF_FILE_VALID(s))
if (S_ISDIR(s->mode))
return -1;
+ if (!use_size_cache)
+ size_only = 0;
+
if (s->data)
return err;
if (!s->sha1_valid ||
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);
if (fd < 0)
goto err_empty;
s->data = mmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0);
- s->should_munmap = 1;
close(fd);
+ if (s->data == MAP_FAILED)
+ goto err_empty;
+ s->should_munmap = 1;
}
else {
char type[20];
- s->data = read_sha1_file(s->sha1, type, &s->size);
- s->should_free = 1;
+ 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_filepair(struct diff_filepair *p)
-{
- free(p->xfrm_msg);
- free(p);
-}
-
void diff_free_filespec_data(struct diff_filespec *s)
{
if (s->should_free)
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)
strcpy(temp->hex, sha1_to_hex(null_sha1));
else
strcpy(temp->hex, sha1_to_hex(one->sha1));
- sprintf(temp->mode, "%06o",
- S_IFREG |ce_permissions(st.st_mode));
+ /* 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))
+ 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);
* infile2 infile2-sha1 infile2-mode [ rename-to ]
*
*/
-static void run_external_diff(const char *name,
+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)
+ const char *xfrm_msg,
+ int complete_rewrite)
{
struct diff_tempfile *temp = diff_temp;
pid_t pid;
int status;
static int atexit_asked = 0;
+ const char *othername;
+ othername = (other? other : name);
if (one && two) {
prepare_temp_file(name, &temp[0], one);
- prepare_temp_file(other ? : name, &temp[1], two);
+ prepare_temp_file(othername, &temp[1], two);
if (! atexit_asked &&
(temp[0].name == temp[0].tmp_path ||
temp[1].name == temp[1].tmp_path)) {
if (pid < 0)
die("unable to fork");
if (!pid) {
- const char *pgm = external_diff();
if (pgm) {
if (one && two) {
const char *exec_arg[10];
* otherwise we use the built-in one.
*/
if (one && two)
- builtin_diff(name, other ? : name, temp, xfrm_msg);
+ builtin_diff(name, othername, temp, xfrm_msg,
+ complete_rewrite);
else
printf("* Unmerged path %s\n", name);
exit(0);
remove_tempfile();
}
-void diff_setup(int reverse_diff_)
+static void run_diff(struct diff_filepair *p)
+{
+ const char *pgm = external_diff();
+ char msg_[PATH_MAX*2+200], *xfrm_msg;
+ struct diff_filespec *one;
+ struct diff_filespec *two;
+ const char *name;
+ const char *other;
+ int complete_rewrite = 0;
+
+ if (DIFF_PAIR_UNMERGED(p)) {
+ /* unmerged */
+ run_external_diff(pgm, p->one->path, NULL, NULL, NULL, NULL,
+ 0);
+ return;
+ }
+
+ name = p->one->path;
+ other = (strcmp(name, p->two->path) ? p->two->path : NULL);
+ one = p->one; two = p->two;
+ switch (p->status) {
+ case DIFF_STATUS_COPIED:
+ sprintf(msg_,
+ "similarity index %d%%\n"
+ "copy from %s\n"
+ "copy to %s",
+ (int)(0.5 + p->score * 100.0/MAX_SCORE),
+ name, other);
+ xfrm_msg = msg_;
+ break;
+ case DIFF_STATUS_RENAMED:
+ sprintf(msg_,
+ "similarity index %d%%\n"
+ "rename from %s\n"
+ "rename to %s",
+ (int)(0.5 + p->score * 100.0/MAX_SCORE),
+ name, other);
+ xfrm_msg = msg_;
+ break;
+ case DIFF_STATUS_MODIFIED:
+ if (p->score) {
+ sprintf(msg_,
+ "dissimilarity index %d%%",
+ (int)(0.5 + p->score * 100.0/MAX_SCORE));
+ xfrm_msg = msg_;
+ complete_rewrite = 1;
+ break;
+ }
+ /* fallthru */
+ default:
+ xfrm_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_external_diff(NULL, name, other, one, null, xfrm_msg, 0);
+ free(null);
+ null = alloc_filespec(one->path);
+ run_external_diff(NULL, name, other, null, two, xfrm_msg, 0);
+ free(null);
+ }
+ else
+ run_external_diff(pgm, name, other, one, two, xfrm_msg,
+ complete_rewrite);
+}
+
+void diff_setup(struct diff_options *options)
+{
+ memset(options, 0, sizeof(*options));
+ options->output_format = DIFF_FORMAT_RAW;
+ options->line_termination = '\n';
+ options->break_opt = -1;
+ options->rename_limit = -1;
+}
+
+int diff_setup_done(struct diff_options *options)
+{
+ if ((options->find_copies_harder || 0 <= options->rename_limit) &&
+ options->detect_rename != DIFF_DETECT_COPY)
+ return -1;
+ 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 oufselves either.
+ */
+ read_cache();
+ }
+ if (options->setup & DIFF_SETUP_USE_SIZE_CACHE)
+ use_size_cache = 1;
+
+ return 0;
+}
+
+int diff_opt_parse(struct diff_options *options, const char **av, int ac)
{
- reverse_diff = reverse_diff_;
+ const char *arg = av[0];
+ if (!strcmp(arg, "-p") || !strcmp(arg, "-u"))
+ options->output_format = DIFF_FORMAT_PATCH;
+ 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, "--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 (!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
+ return 0;
+ return 1;
+}
+
+static int parse_num(const char **cp_p)
+{
+ int num, scale, ch, cnt;
+ const char *cp = *cp_p;
+
+ cnt = num = 0;
+ scale = 1;
+ while ('0' <= (ch = *cp) && ch <= '9') {
+ if (cnt++ < 5) {
+ /* We simply ignore more than 5 digits precision. */
+ scale *= 10;
+ num = num * 10 + ch - '0';
+ }
+ cp++;
+ }
+ *cp_p = cp;
+
+ /* user says num divided by scale and we say internally that
+ * is MAX_SCORE * num / scale.
+ */
+ return (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);
+ }
+ }
+ if (*opt != 0)
+ return -1;
+ return opt1 | (opt2 << 16);
}
struct diff_queue_struct diff_queued_diff;
struct diff_filepair *dp = xmalloc(sizeof(*dp));
dp->one = one;
dp->two = two;
- dp->xfrm_msg = NULL;
- dp->orig_order = queue->nr;
- dp->xfrm_work = 0;
- diff_q(queue, dp);
+ dp->score = 0;
+ dp->status = 0;
+ dp->source_stays = 0;
+ dp->broken_pair = 0;
+ if (queue)
+ diff_q(queue, dp);
return dp;
}
-static void diff_flush_raw(struct diff_filepair *p)
+void diff_free_filepair(struct diff_filepair *p)
{
- if (DIFF_PAIR_UNMERGED(p)) {
- printf("U %s%c", p->one->path, line_termination);
- return;
- }
- printf(":%06o %06o %s ",
- p->one->mode, p->two->mode, sha1_to_hex(p->one->sha1));
- printf("%s%c%s%c%s%c",
- sha1_to_hex(p->two->sha1), inter_name_termination,
- p->one->path, inter_name_termination,
- p->two->path, line_termination);
+ diff_free_filespec_data(p->one);
+ diff_free_filespec_data(p->two);
+ free(p->one);
+ free(p->two);
+ free(p);
}
-static void diff_flush_patch(struct diff_filepair *p)
+static void diff_flush_raw(struct diff_filepair *p,
+ int line_termination,
+ int inter_name_termination,
+ int output_format)
{
- const char *name, *other;
+ int two_paths;
+ char status[10];
+
+ if (line_termination) {
+ const char *const err =
+ "path %s cannot be expressed without -z";
+ if (strchr(p->one->path, line_termination) ||
+ strchr(p->one->path, inter_name_termination))
+ die(err, p->one->path);
+ if (strchr(p->two->path, line_termination) ||
+ strchr(p->two->path, inter_name_termination))
+ die(err, p->two->path);
+ }
- name = p->one->path;
- other = (strcmp(name, p->two->path) ? p->two->path : NULL);
- 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 (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;
+ }
+ 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 (output_format != DIFF_FORMAT_NAME_STATUS) {
+ printf(":%06o %06o %s ",
+ p->one->mode, p->two->mode, sha1_to_hex(p->one->sha1));
+ printf("%s ", sha1_to_hex(p->two->sha1));
+ }
+ printf("%s%c%s",status, inter_name_termination, p->one->path);
+ if (two_paths)
+ printf("%c%s", inter_name_termination, p->two->path);
+ putchar(line_termination);
+}
- if (DIFF_PAIR_UNMERGED(p))
- run_external_diff(name, NULL, NULL, NULL, NULL);
- else
- run_external_diff(name, other, p->one, p->two, p->xfrm_msg);
+static void diff_flush_name(struct diff_filepair *p,
+ int line_termination)
+{
+ printf("%s%c", p->two->path, line_termination);
}
-static int uninteresting(struct diff_filepair *p)
+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
one = p->one;
two = p->two;
- /* deletion, addition, mode change and renames are all interesting. */
+ /* deletion, addition, mode or type change
+ * and rename are all interesting.
+ */
if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) ||
- (one->mode != two->mode) ||
+ DIFF_PAIR_MODE_CHANGED(p) ||
strcmp(one->path, two->path))
return 0;
return 0;
}
-void diffcore_prune(void)
+static void diff_flush_patch(struct diff_filepair *p)
+{
+ if (diff_unmodified_pair(p))
+ return;
+
+ 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);
+}
+
+int diff_queue_is_empty(void)
{
- /*
- * Although rename/copy detection wants to have "no-change"
- * entries fed into them, the downstream do not need to see
- * them. This function removes such entries.
- *
- * The applications that use rename/copy should:
- *
- * (1) feed change and "no-change" entries via diff_queue().
- * (2) call diffcore_rename, and any other future diffcore_xxx
- * that would benefit by still having "no-change" entries.
- * (3) call diffcore_prune
- * (4) call other diffcore_xxx that do not need to see
- * "no-change" entries.
- */
struct diff_queue_struct *q = &diff_queued_diff;
- struct diff_queue_struct outq;
int i;
+ for (i = 0; i < q->nr; i++)
+ if (!diff_unmodified_pair(q->queue[i]))
+ return 0;
+ return 1;
+}
- outq.queue = NULL;
- outq.nr = outq.alloc = 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);
+}
+
+void diff_debug_filepair(const struct diff_filepair *p, int i)
+{
+ 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);
+}
+void diff_debug_queue(const char *msg, struct diff_queue_struct *q)
+{
+ 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];
- if (!uninteresting(p))
- diff_q(&outq, p);
- else
- diff_free_filepair(p);
+ diff_debug_filepair(p, i);
}
- free(q->queue);
- *q = outq;
- return;
}
+#endif
-static void diff_flush_one(struct diff_filepair *p)
+static void diff_resolve_rename_copy(void)
{
- if (uninteresting(p))
- return;
- if (generate_patch)
- diff_flush_patch(p);
- else
- diff_flush_raw(p);
+ 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 (memcmp(p->one->sha1, p->two->sha1, 20) ||
+ 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);
}
-int diff_queue_is_empty(void)
+void diff_flush(struct diff_options *options)
{
struct diff_queue_struct *q = &diff_queued_diff;
int i;
+ int inter_name_termination = '\t';
+ int diff_output_format = options->output_format;
+ int line_termination = options->line_termination;
+
+ if (!line_termination)
+ inter_name_termination = 0;
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
- if (!uninteresting(p))
- return 0;
+ if ((diff_output_format == DIFF_FORMAT_NO_OUTPUT) ||
+ (p->status == DIFF_STATUS_UNKNOWN))
+ continue;
+ if (p->status == 0)
+ die("internal error in diff-resolve-rename-copy");
+ switch (diff_output_format) {
+ case DIFF_FORMAT_PATCH:
+ diff_flush_patch(p);
+ break;
+ case DIFF_FORMAT_RAW:
+ case DIFF_FORMAT_NAME_STATUS:
+ diff_flush_raw(p, line_termination,
+ inter_name_termination,
+ diff_output_format);
+ break;
+ case DIFF_FORMAT_NAME:
+ diff_flush_name(p, line_termination);
+ break;
+ }
+ diff_free_filepair(q->queue[i]);
}
- return 1;
+ free(q->queue);
+ q->queue = NULL;
+ q->nr = q->alloc = 0;
}
-void diff_flush(int diff_output_style)
+static void diffcore_apply_filter(const char *filter)
{
- struct diff_queue_struct *q = &diff_queued_diff;
int i;
+ struct diff_queue_struct *q = &diff_queued_diff;
+ struct diff_queue_struct outq;
+ outq.queue = NULL;
+ outq.nr = outq.alloc = 0;
- generate_patch = 0;
- switch (diff_output_style) {
- case DIFF_FORMAT_HUMAN:
- line_termination = '\n';
- inter_name_termination = '\t';
- break;
- case DIFF_FORMAT_MACHINE:
- line_termination = inter_name_termination = 0;
- break;
- case DIFF_FORMAT_PATCH:
- generate_patch = 1;
- break;
+ 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]);
}
- for (i = 0; i < q->nr; i++)
- diff_flush_one(q->queue[i]);
- for (i = 0; i < q->nr; i++) {
- struct diff_filepair *p = q->queue[i];
- diff_free_filespec_data(p->one);
- diff_free_filespec_data(p->two);
- free(p->xfrm_msg);
- free(p);
+ 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->queue = NULL;
- q->nr = q->alloc = 0;
+ *q = outq;
}
-void diff_addremove(int addremove, unsigned mode,
+void diffcore_std(struct diff_options *options)
+{
+ if (options->paths && options->paths[0])
+ diffcore_pathspec(options->paths);
+ 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);
+}
+
+
+void diffcore_std_no_resolve(struct diff_options *options)
+{
+ 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(struct diff_options *options,
+ int addremove, unsigned mode,
const unsigned char *sha1,
const char *base, const char *path)
{
* 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() should
- * also have the same effect. diff_flush() should
- * filter uninteresting ones out at the final output
- * stage.
+ * 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 (reverse_diff)
+ if (options->reverse_diff)
addremove = (addremove == '+' ? '-' :
addremove == '-' ? '+' : addremove);
diff_queue(&diff_queued_diff, one, two);
}
-void diff_guif(unsigned old_mode,
- unsigned new_mode,
- const unsigned char *old_sha1,
- const unsigned char *new_sha1,
- const char *old_path,
- const char *new_path)
-{
- struct diff_filespec *one, *two;
-
- if (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;
- }
- one = alloc_filespec(old_path);
- two = alloc_filespec(new_path);
- if (old_mode)
- fill_filespec(one, old_sha1, old_mode);
- if (new_mode)
- fill_filespec(two, new_sha1, new_mode);
- 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)
char concatpath[PATH_MAX];
struct diff_filespec *one, *two;
- if (reverse_diff) {
+ if (options->reverse_diff) {
unsigned tmp;
const unsigned char *tmp_c;
tmp = old_mode; old_mode = new_mode; new_mode = tmp;
diff_queue(&diff_queued_diff, one, two);
}
-void diff_unmerge(const char *path)
+void diff_unmerge(struct diff_options *options,
+ const char *path)
{
struct diff_filespec *one, *two;
one = alloc_filespec(path);