*
* This applies patches on top of some (arbitrary) version of the SCM.
*
- * NOTE! It does all its work in the index file, and only cares about
- * the files in the working directory if you tell it to "merge" the
- * patch apply.
- *
- * Even when merging it always takes the source from the index, and
- * uses the working tree as a "branch" for a 3-way merge.
*/
-#include <ctype.h>
-
+#include <fnmatch.h>
#include "cache.h"
+#include "quote.h"
-// We default to the merge behaviour, since that's what most people would
-// expect.
-//
// --check turns on checking that the working tree matches the
// files that are being modified, but doesn't apply the patch
// --stat does just a diffstat, and doesn't actually apply
-// --show-files shows the directory changes
+// --numstat does numeric diffstat, and doesn't actually apply
+// --index-info shows the old and new index info for paths if available.
//
-static int merge_patch = 1;
+static int allow_binary_replacement = 0;
+static int check_index = 0;
+static int write_index = 0;
static int diffstat = 0;
+static int numstat = 0;
+static int summary = 0;
static int check = 0;
static int apply = 1;
-static int show_files = 0;
-static const char apply_usage[] = "git-apply [--stat] [--check] [--show-files] <patch>";
+static int no_add = 0;
+static int show_index_info = 0;
+static int line_termination = '\n';
+static const char apply_usage[] =
+"git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [-z] <patch>...";
/*
* For "diff-stat" like behaviour, we keep track of the biggest change
struct patch {
char *new_name, *old_name, *def_name;
unsigned int old_mode, new_mode;
- int is_rename, is_copy, is_new, is_delete;
+ int is_rename, is_copy, is_new, is_delete, is_binary;
int lines_added, lines_deleted;
+ int score;
struct fragment *fragments;
+ char *result;
+ unsigned long resultsize;
+ char old_sha1_prefix[41];
+ char new_sha1_prefix[41];
struct patch *next;
};
return buffer;
}
-static unsigned long linelen(char *buffer, unsigned long size)
+static unsigned long linelen(const char *buffer, unsigned long size)
{
unsigned long len = 0;
while (size--) {
return !memcmp("/dev/null", str, 9) && isspace(str[9]);
}
-#define TERM_EXIST 1
-#define TERM_SPACE 2
-#define TERM_TAB 4
+#define TERM_SPACE 1
+#define TERM_TAB 2
static int name_terminate(const char *name, int namelen, int c, int terminate)
{
if (c == '\t' && !(terminate & TERM_TAB))
return 0;
- /*
- * Do we want an existing name? Return false and
- * continue if it's not there.
- */
- if (terminate & TERM_EXIST)
- return cache_name_pos(name, namelen) >= 0;
-
return 1;
}
const char *start = line;
char *name;
+ if (*line == '"') {
+ /* Proposed "new-style" GNU patch/diff format; see
+ * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2
+ */
+ name = unquote_c_style(line, NULL);
+ if (name) {
+ char *cp = name;
+ while (p_value) {
+ cp = strchr(name, '/');
+ if (!cp)
+ break;
+ cp++;
+ p_value--;
+ }
+ if (cp) {
+ /* name can later be freed, so we need
+ * to memmove, not just return cp
+ */
+ memmove(name, cp, strlen(cp) + 1);
+ free(def);
+ return name;
+ }
+ else {
+ free(name);
+ name = NULL;
+ }
+ }
+ }
+
for (;;) {
char c = *line;
} else if (is_dev_null(second)) {
patch->is_new = 0;
patch->is_delete = 1;
- name = find_name(first, NULL, p_value, TERM_EXIST | TERM_SPACE | TERM_TAB);
+ name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
patch->old_name = name;
} else {
- name = find_name(first, NULL, p_value, TERM_EXIST | TERM_SPACE | TERM_TAB);
- name = find_name(second, name, p_value, TERM_EXIST | TERM_SPACE | TERM_TAB);
+ name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
+ name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB);
patch->old_name = patch->new_name = name;
}
if (!name)
*/
static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew)
{
- int len;
- const char *name;
-
if (!orig_name && !isnull)
return find_name(line, NULL, 1, 0);
- name = "/dev/null";
- len = 9;
if (orig_name) {
+ int len;
+ const char *name;
+ char *another;
name = orig_name;
len = strlen(name);
if (isnull)
die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr);
- }
-
- if (*name == '/')
- goto absolute_path;
-
- for (;;) {
- char c = *line++;
- if (c == '\n')
- break;
- if (c != '/')
- continue;
-absolute_path:
- if (memcmp(line, name, len) || line[len] != '\n')
- break;
+ another = find_name(line, NULL, 1, 0);
+ if (!another || memcmp(another, name, len))
+ die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
+ free(another);
return orig_name;
}
- die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
- return NULL;
+ else {
+ /* expect "/dev/null" */
+ if (memcmp("/dev/null", line, 9) || line[9] != '\n')
+ die("git-apply: bad git-diff - expected /dev/null on line %d", linenr);
+ return NULL;
+ }
}
static int gitdiff_oldname(const char *line, struct patch *patch)
static int gitdiff_similarity(const char *line, struct patch *patch)
{
+ if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
+ patch->score = 0;
+ return 0;
+}
+
+static int gitdiff_dissimilarity(const char *line, struct patch *patch)
+{
+ if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
+ patch->score = 0;
+ return 0;
+}
+
+static int gitdiff_index(const char *line, struct patch *patch)
+{
+ /* index line is N hexadecimal, "..", N hexadecimal,
+ * and optional space with octal mode.
+ */
+ const char *ptr, *eol;
+ int len;
+
+ ptr = strchr(line, '.');
+ if (!ptr || ptr[1] != '.' || 40 < ptr - line)
+ return 0;
+ len = ptr - line;
+ memcpy(patch->old_sha1_prefix, line, len);
+ patch->old_sha1_prefix[len] = 0;
+
+ line = ptr + 2;
+ ptr = strchr(line, ' ');
+ eol = strchr(line, '\n');
+
+ if (!ptr || eol < ptr)
+ ptr = eol;
+ len = ptr - line;
+
+ if (40 < len)
+ return 0;
+ memcpy(patch->new_sha1_prefix, line, len);
+ patch->new_sha1_prefix[len] = 0;
+ if (*ptr == ' ')
+ patch->new_mode = patch->old_mode = strtoul(ptr+1, NULL, 8);
return 0;
}
return -1;
}
-static char *git_header_name(char *line)
+static const char *stop_at_slash(const char *line, int llen)
+{
+ int i;
+
+ for (i = 0; i < llen; i++) {
+ int ch = line[i];
+ if (ch == '/')
+ return line + i;
+ }
+ return NULL;
+}
+
+/* This is to extract the same name that appears on "diff --git"
+ * line. We do not find and return anything if it is a rename
+ * patch, and it is OK because we will find the name elsewhere.
+ * We need to reliably find name only when it is mode-change only,
+ * creation or deletion of an empty file. In any of these cases,
+ * both sides are the same name under a/ and b/ respectively.
+ */
+static char *git_header_name(char *line, int llen)
{
int len;
- char *name, *second;
+ const char *name;
+ const char *second = NULL;
- /*
- * Find the first '/'
- */
- name = line;
- for (;;) {
- char c = *name++;
- if (c == '\n')
+ line += strlen("diff --git ");
+ llen -= strlen("diff --git ");
+
+ if (*line == '"') {
+ const char *cp;
+ char *first = unquote_c_style(line, &second);
+ if (!first)
return NULL;
- if (c == '/')
- break;
+
+ /* advance to the first slash */
+ cp = stop_at_slash(first, strlen(first));
+ if (!cp || cp == first) {
+ /* we do not accept absolute paths */
+ free_first_and_fail:
+ free(first);
+ return NULL;
+ }
+ len = strlen(cp+1);
+ memmove(first, cp+1, len+1); /* including NUL */
+
+ /* second points at one past closing dq of name.
+ * find the second name.
+ */
+ while ((second < line + llen) && isspace(*second))
+ second++;
+
+ if (line + llen <= second)
+ goto free_first_and_fail;
+ if (*second == '"') {
+ char *sp = unquote_c_style(second, NULL);
+ if (!sp)
+ goto free_first_and_fail;
+ cp = stop_at_slash(sp, strlen(sp));
+ if (!cp || cp == sp) {
+ free_both_and_fail:
+ free(sp);
+ goto free_first_and_fail;
+ }
+ /* They must match, otherwise ignore */
+ if (strcmp(cp+1, first))
+ goto free_both_and_fail;
+ free(sp);
+ return first;
+ }
+
+ /* unquoted second */
+ cp = stop_at_slash(second, line + llen - second);
+ if (!cp || cp == second)
+ goto free_first_and_fail;
+ cp++;
+ if (line + llen - cp != len + 1 ||
+ memcmp(first, cp, len))
+ goto free_first_and_fail;
+ return first;
}
- /*
- * We don't accept absolute paths (/dev/null) as possibly valid
- */
- if (name == line+1)
+ /* unquoted first name */
+ name = stop_at_slash(line, llen);
+ if (!name || name == line)
return NULL;
+ name++;
+
+ /* since the first name is unquoted, a dq if exists must be
+ * the beginning of the second name.
+ */
+ for (second = name; second < line + llen; second++) {
+ if (*second == '"') {
+ const char *cp = second;
+ const char *np;
+ char *sp = unquote_c_style(second, NULL);
+
+ if (!sp)
+ return NULL;
+ np = stop_at_slash(sp, strlen(sp));
+ if (!np || np == sp) {
+ free_second_and_fail:
+ free(sp);
+ return NULL;
+ }
+ np++;
+ len = strlen(np);
+ if (len < cp - name &&
+ !strncmp(np, name, len) &&
+ isspace(name[len])) {
+ /* Good */
+ memmove(sp, np, len + 1);
+ return sp;
+ }
+ goto free_second_and_fail;
+ }
+ }
+
/*
* Accept a name only if it shows up twice, exactly the same
* form.
default:
continue;
case '\n':
- break;
+ return NULL;
case '\t': case ' ':
second = name+len;
for (;;) {
* or removing or adding empty files), so we get
* the default name from the header.
*/
- patch->def_name = git_header_name(line + strlen("diff --git "));
+ patch->def_name = git_header_name(line, len);
line += len;
size -= len;
{ "new file mode ", gitdiff_newfile },
{ "copy from ", gitdiff_copysrc },
{ "copy to ", gitdiff_copydst },
+ { "rename old ", gitdiff_renamesrc },
+ { "rename new ", gitdiff_renamedst },
{ "rename from ", gitdiff_renamesrc },
{ "rename to ", gitdiff_renamedst },
{ "similarity index ", gitdiff_similarity },
+ { "dissimilarity index ", gitdiff_dissimilarity },
+ { "index ", gitdiff_index },
{ "", gitdiff_unrecognized },
};
int i;
struct fragment dummy;
if (parse_fragment_header(line, len, &dummy) < 0)
continue;
- error("patch fragment without header at line %d: %.*s", linenr, len-1, line);
+ error("patch fragment without header at line %d: %.*s", linenr, (int)len-1, line);
}
if (size < len + 6)
*/
if (!memcmp("diff --git ", line, 11)) {
int git_hdr_len = parse_git_header(line, len, size, patch);
- if (git_hdr_len < 0)
+ if (git_hdr_len <= len)
continue;
- if (!patch->old_name && !patch->new_name)
- die("git diff header lacks filename information");
+ if (!patch->old_name && !patch->new_name) {
+ if (!patch->def_name)
+ die("git diff header lacks filename information (line %d)", linenr);
+ patch->old_name = patch->new_name = patch->def_name;
+ }
*hdrsize = git_hdr_len;
return offset;
}
{
int added, deleted;
int len = linelen(line, size), offset;
- unsigned long pos[4], oldlines, newlines;
+ unsigned long oldlines, newlines;
offset = parse_fragment_header(line, len, fragment);
if (offset < 0)
oldlines = fragment->oldlines;
newlines = fragment->newlines;
- if (patch->is_new < 0 && (pos[0] || oldlines))
- patch->is_new = 0;
- if (patch->is_delete < 0 && (pos[1] || newlines))
- patch->is_delete = 0;
+ if (patch->is_new < 0) {
+ patch->is_new = !oldlines;
+ if (!oldlines)
+ patch->old_name = NULL;
+ }
+ if (patch->is_delete < 0) {
+ patch->is_delete = !newlines;
+ if (!newlines)
+ patch->new_name = NULL;
+ }
+
+ if (patch->is_new != !oldlines)
+ return error("new file depends on old contents");
+ if (patch->is_delete != !newlines) {
+ if (newlines)
+ return error("deleted file still has contents");
+ fprintf(stderr, "** warning: file %s becomes empty but is not deleted\n", patch->new_name);
+ }
/* Parse the thing.. */
line += len;
added++;
newlines--;
break;
- /* We allow "\ No newline at end of file" */
+
+ /* We allow "\ No newline at end of file". Depending
+ * on locale settings when the patch was produced we
+ * don't know what this line looks like. The only
+ * thing we do know is that it begins with "\ ".
+ * Checking for 12 is just for sanity check -- any
+ * l10n of "\ No newline..." is at least that long.
+ */
case '\\':
+ if (len < 12 || memcmp(line, "\\ ", 2))
+ return -1;
break;
}
}
+ /* If a fragment ends with an incomplete line, we failed to include
+ * it in the above loop because we hit oldlines == newlines == 0
+ * before seeing it.
+ */
+ if (12 < size && !memcmp(line, "\\ ", 2))
+ offset += linelen(line, size);
+
patch->lines_added += added;
patch->lines_deleted += deleted;
return offset;
return offset;
}
+static inline int metadata_changes(struct patch *patch)
+{
+ return patch->is_rename > 0 ||
+ patch->is_copy > 0 ||
+ patch->is_new > 0 ||
+ patch->is_delete ||
+ (patch->old_mode && patch->new_mode &&
+ patch->old_mode != patch->new_mode);
+}
+
static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
{
int hdrsize, patchsize;
patchsize = parse_single_patch(buffer + offset + hdrsize, size - offset - hdrsize, patch);
+ if (!patchsize) {
+ static const char *binhdr[] = {
+ "Binary files ",
+ "Files ",
+ NULL,
+ };
+ int i;
+ int hd = hdrsize + offset;
+ unsigned long llen = linelen(buffer + hd, size - hd);
+
+ if (!memcmp(" differ\n", buffer + hd + llen - 8, 8))
+ for (i = 0; binhdr[i]; i++) {
+ int len = strlen(binhdr[i]);
+ if (len < size - hd &&
+ !memcmp(binhdr[i], buffer + hd, len)) {
+ patch->is_binary = 1;
+ break;
+ }
+ }
+
+ /* Empty patch cannot be applied if:
+ * - it is a binary patch and we do not do binary_replace, or
+ * - text patch without metadata change
+ */
+ if ((apply || check) &&
+ (patch->is_binary
+ ? !allow_binary_replacement
+ : !metadata_changes(patch)))
+ die("patch with only garbage at line %d", linenr);
+ }
+
return offset + hdrsize + patchsize;
}
-const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
-const char minuses[]= "----------------------------------------------------------------------";
+static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
+static const char minuses[]= "----------------------------------------------------------------------";
static void show_stats(struct patch *patch)
{
- char *name = patch->old_name;
- int len, max, add, del;
+ const char *prefix = "";
+ char *name = patch->new_name;
+ char *qname = NULL;
+ int len, max, add, del, total;
if (!name)
- name = patch->new_name;
+ name = patch->old_name;
+
+ if (0 < (len = quote_c_style(name, NULL, NULL, 0))) {
+ qname = xmalloc(len + 1);
+ quote_c_style(name, qname, NULL, 0);
+ name = qname;
+ }
/*
* "scale" the filename
max = max_len;
if (max > 50)
max = 50;
- if (len > max)
+ if (len > max) {
+ char *slash;
+ prefix = "...";
+ max -= 3;
name += len - max;
+ slash = strchr(name, '/');
+ if (slash)
+ name = slash;
+ }
len = max;
/*
max = max_change;
if (max + len > 70)
max = 70 - len;
-
- add = (patch->lines_added * max + max_change/2) / max_change;
- del = (patch->lines_deleted * max + max_change/2) / max_change;
- printf(" %-*s |%5d %.*s%.*s\n",
- len, name, patch->lines_added + patch->lines_deleted,
- add, pluses, del, minuses);
+
+ add = patch->lines_added;
+ del = patch->lines_deleted;
+ total = add + del;
+
+ if (max_change > 0) {
+ total = (total * max + max_change / 2) / max_change;
+ add = (add * max + max_change / 2) / max_change;
+ del = total - add;
+ }
+ if (patch->is_binary)
+ printf(" %s%-*s | Bin\n", prefix, len, name);
+ else
+ printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
+ len, name, patch->lines_added + patch->lines_deleted,
+ add, pluses, del, minuses);
+ if (qname)
+ free(qname);
+}
+
+static int read_old_data(struct stat *st, const char *path, void *buf, unsigned long size)
+{
+ int fd;
+ unsigned long got;
+
+ switch (st->st_mode & S_IFMT) {
+ case S_IFLNK:
+ return readlink(path, buf, size);
+ case S_IFREG:
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ return error("unable to open %s", path);
+ got = 0;
+ for (;;) {
+ int ret = read(fd, buf + got, size - got);
+ if (ret < 0) {
+ if (errno == EAGAIN)
+ continue;
+ break;
+ }
+ if (!ret)
+ break;
+ got += ret;
+ }
+ close(fd);
+ return got;
+
+ default:
+ return -1;
+ }
+}
+
+static int find_offset(const char *buf, unsigned long size, const char *fragment, unsigned long fragsize, int line)
+{
+ int i;
+ unsigned long start, backwards, forwards;
+
+ if (fragsize > size)
+ return -1;
+
+ start = 0;
+ if (line > 1) {
+ unsigned long offset = 0;
+ i = line-1;
+ while (offset + fragsize <= size) {
+ if (buf[offset++] == '\n') {
+ start = offset;
+ if (!--i)
+ break;
+ }
+ }
+ }
+
+ /* Exact line number? */
+ if (!memcmp(buf + start, fragment, fragsize))
+ return start;
+
+ /*
+ * There's probably some smart way to do this, but I'll leave
+ * that to the smart and beautiful people. I'm simple and stupid.
+ */
+ backwards = start;
+ forwards = start;
+ for (i = 0; ; i++) {
+ unsigned long try;
+ int n;
+
+ /* "backward" */
+ if (i & 1) {
+ if (!backwards) {
+ if (forwards + fragsize > size)
+ break;
+ continue;
+ }
+ do {
+ --backwards;
+ } while (backwards && buf[backwards-1] != '\n');
+ try = backwards;
+ } else {
+ while (forwards + fragsize <= size) {
+ if (buf[forwards++] == '\n')
+ break;
+ }
+ try = forwards;
+ }
+
+ if (try + fragsize > size)
+ continue;
+ if (memcmp(buf + try, fragment, fragsize))
+ continue;
+ n = (i >> 1)+1;
+ if (i & 1)
+ n = -n;
+ return try;
+ }
+
+ /*
+ * We should start searching forward and backward.
+ */
+ return -1;
+}
+
+struct buffer_desc {
+ char *buffer;
+ unsigned long size;
+ unsigned long alloc;
+};
+
+static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag)
+{
+ char *buf = desc->buffer;
+ const char *patch = frag->patch;
+ int offset, size = frag->size;
+ char *old = xmalloc(size);
+ char *new = xmalloc(size);
+ int oldsize = 0, newsize = 0;
+
+ while (size > 0) {
+ int len = linelen(patch, size);
+ int plen;
+
+ if (!len)
+ break;
+
+ /*
+ * "plen" is how much of the line we should use for
+ * the actual patch data. Normally we just remove the
+ * first character on the line, but if the line is
+ * followed by "\ No newline", then we also remove the
+ * last one (which is the newline, of course).
+ */
+ plen = len-1;
+ if (len < size && patch[len] == '\\')
+ plen--;
+ switch (*patch) {
+ case ' ':
+ case '-':
+ memcpy(old + oldsize, patch + 1, plen);
+ oldsize += plen;
+ if (*patch == '-')
+ break;
+ /* Fall-through for ' ' */
+ case '+':
+ if (*patch != '+' || !no_add) {
+ memcpy(new + newsize, patch + 1, plen);
+ newsize += plen;
+ }
+ break;
+ case '@': case '\\':
+ /* Ignore it, we already handled it */
+ break;
+ default:
+ return -1;
+ }
+ patch += len;
+ size -= len;
+ }
+
+ offset = find_offset(buf, desc->size, old, oldsize, frag->newpos);
+ if (offset >= 0) {
+ int diff = newsize - oldsize;
+ unsigned long size = desc->size + diff;
+ unsigned long alloc = desc->alloc;
+
+ if (size > alloc) {
+ alloc = size + 8192;
+ desc->alloc = alloc;
+ buf = xrealloc(buf, alloc);
+ desc->buffer = buf;
+ }
+ desc->size = size;
+ memmove(buf + offset + newsize, buf + offset + oldsize, size - offset - newsize);
+ memcpy(buf + offset, new, newsize);
+ offset = 0;
+ }
+
+ free(old);
+ free(new);
+ return offset;
+}
+
+static int apply_fragments(struct buffer_desc *desc, struct patch *patch)
+{
+ struct fragment *frag = patch->fragments;
+ const char *name = patch->old_name ? patch->old_name : patch->new_name;
+
+ if (patch->is_binary) {
+ unsigned char sha1[20];
+
+ if (!allow_binary_replacement)
+ return error("cannot apply binary patch to '%s' "
+ "without --allow-binary-replacement",
+ name);
+
+ /* For safety, we require patch index line to contain
+ * full 40-byte textual SHA1 for old and new, at least for now.
+ */
+ if (strlen(patch->old_sha1_prefix) != 40 ||
+ strlen(patch->new_sha1_prefix) != 40 ||
+ get_sha1_hex(patch->old_sha1_prefix, sha1) ||
+ get_sha1_hex(patch->new_sha1_prefix, sha1))
+ return error("cannot apply binary patch to '%s' "
+ "without full index line", name);
+
+ if (patch->old_name) {
+ unsigned char hdr[50];
+ int hdrlen;
+
+ /* See if the old one matches what the patch
+ * applies to.
+ */
+ write_sha1_file_prepare(desc->buffer, desc->size,
+ "blob", sha1, hdr, &hdrlen);
+ if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix))
+ return error("the patch applies to '%s' (%s), "
+ "which does not match the "
+ "current contents.",
+ name, sha1_to_hex(sha1));
+ }
+ else {
+ /* Otherwise, the old one must be empty. */
+ if (desc->size)
+ return error("the patch applies to an empty "
+ "'%s' but it is not empty", name);
+ }
+
+ /* For now, we do not record post-image data in the patch,
+ * and require the object already present in the recipient's
+ * object database.
+ */
+ if (desc->buffer) {
+ free(desc->buffer);
+ desc->alloc = desc->size = 0;
+ }
+ get_sha1_hex(patch->new_sha1_prefix, sha1);
+
+ if (memcmp(sha1, null_sha1, 20)) {
+ char type[10];
+ unsigned long size;
+
+ desc->buffer = read_sha1_file(sha1, type, &size);
+ if (!desc->buffer)
+ return error("the necessary postimage %s for "
+ "'%s' does not exist",
+ patch->new_sha1_prefix, name);
+ desc->alloc = desc->size = size;
+ }
+
+ return 0;
+ }
+
+ while (frag) {
+ if (apply_one_fragment(desc, frag) < 0)
+ return error("patch failed: %s:%ld",
+ name, frag->oldpos);
+ frag = frag->next;
+ }
+ return 0;
+}
+
+static int apply_data(struct patch *patch, struct stat *st)
+{
+ char *buf;
+ unsigned long size, alloc;
+ struct buffer_desc desc;
+
+ size = 0;
+ alloc = 0;
+ buf = NULL;
+ if (patch->old_name) {
+ size = st->st_size;
+ alloc = size + 8192;
+ buf = xmalloc(alloc);
+ if (read_old_data(st, patch->old_name, buf, alloc) != size)
+ return error("read of %s failed", patch->old_name);
+ }
+
+ desc.size = size;
+ desc.alloc = alloc;
+ desc.buffer = buf;
+ if (apply_fragments(&desc, patch) < 0)
+ return -1;
+ patch->result = desc.buffer;
+ patch->resultsize = desc.size;
+
+ if (patch->is_delete && patch->resultsize)
+ return error("removal patch leaves file contents");
+
+ return 0;
}
static int check_patch(struct patch *patch)
struct stat st;
const char *old_name = patch->old_name;
const char *new_name = patch->new_name;
+ const char *name = old_name ? old_name : new_name;
if (old_name) {
- int pos = cache_name_pos(old_name, strlen(old_name));
int changed;
+ int stat_ret = lstat(old_name, &st);
+
+ if (check_index) {
+ int pos = cache_name_pos(old_name, strlen(old_name));
+ if (pos < 0)
+ return error("%s: does not exist in index",
+ old_name);
+ if (stat_ret < 0) {
+ struct checkout costate;
+ if (errno != ENOENT)
+ return error("%s: %s", old_name,
+ strerror(errno));
+ /* checkout */
+ costate.base_dir = "";
+ costate.base_dir_len = 0;
+ costate.force = 0;
+ costate.quiet = 0;
+ costate.not_new = 0;
+ costate.refresh_cache = 1;
+ if (checkout_entry(active_cache[pos],
+ &costate) ||
+ lstat(old_name, &st))
+ return -1;
+ }
+
+ changed = ce_match_stat(active_cache[pos], &st);
+ if (changed)
+ return error("%s: does not match index",
+ old_name);
+ }
+ else if (stat_ret < 0)
+ return error("%s: %s", old_name, strerror(errno));
- if (pos < 0)
- return error("%s: does not exist in index", old_name);
if (patch->is_new < 0)
patch->is_new = 0;
- if (lstat(old_name, &st) < 0)
- return error("%s: %s\n", strerror(errno));
- changed = ce_match_stat(active_cache[pos], &st);
- if (changed)
- return error("%s: does not match index", old_name);
+ st.st_mode = ntohl(create_ce_mode(st.st_mode));
if (!patch->old_mode)
patch->old_mode = st.st_mode;
+ if ((st.st_mode ^ patch->old_mode) & S_IFMT)
+ return error("%s: wrong type", old_name);
+ if (st.st_mode != patch->old_mode)
+ fprintf(stderr, "warning: %s has type %o, expected %o\n",
+ old_name, st.st_mode, patch->old_mode);
}
if (new_name && (patch->is_new | patch->is_rename | patch->is_copy)) {
- if (cache_name_pos(new_name, strlen(new_name)) >= 0)
+ if (check_index && cache_name_pos(new_name, strlen(new_name)) >= 0)
return error("%s: already exists in index", new_name);
if (!lstat(new_name, &st))
return error("%s: already exists in working directory", new_name);
if (errno != ENOENT)
return error("%s: %s", new_name, strerror(errno));
+ if (!patch->new_mode) {
+ if (patch->is_new)
+ patch->new_mode = S_IFREG | 0644;
+ else
+ patch->new_mode = patch->old_mode;
+ }
}
+
+ if (new_name && old_name) {
+ int same = !strcmp(old_name, new_name);
+ if (!patch->new_mode)
+ patch->new_mode = patch->old_mode;
+ if ((patch->old_mode ^ patch->new_mode) & S_IFMT)
+ return error("new mode (%o) of %s does not match old mode (%o)%s%s",
+ patch->new_mode, new_name, patch->old_mode,
+ same ? "" : " of ", same ? "" : old_name);
+ }
+
+ if (apply_data(patch, &st) < 0)
+ return error("%s: patch does not apply", name);
return 0;
}
return error;
}
-static void show_file(int c, unsigned int mode, const char *name)
+static inline int is_null_sha1(const unsigned char *sha1)
{
- printf("%c %o %s\n", c, mode, name);
+ return !memcmp(sha1, null_sha1, 20);
}
-static void show_file_list(struct patch *patch)
+static void show_index_list(struct patch *list)
{
- for (;patch ; patch = patch->next) {
- if (patch->is_rename) {
- show_file('-', patch->old_mode, patch->old_name);
- show_file('+', patch->new_mode, patch->new_name);
- continue;
- }
- if (patch->is_copy || patch->is_new) {
- show_file('+', patch->new_mode, patch->new_name);
- continue;
- }
- if (patch->is_delete) {
- show_file('-', patch->old_mode, patch->old_name);
- continue;
- }
- if (patch->old_mode && patch->new_mode && patch->old_mode != patch->new_mode) {
- printf("M %o:%o %s\n", patch->old_mode, patch->new_mode, patch->old_name);
- continue;
- }
- printf("M %o %s\n", patch->old_mode, patch->old_name);
+ struct patch *patch;
+
+ /* Once we start supporting the reverse patch, it may be
+ * worth showing the new sha1 prefix, but until then...
+ */
+ for (patch = list; patch; patch = patch->next) {
+ const unsigned char *sha1_ptr;
+ unsigned char sha1[20];
+ const char *name;
+
+ name = patch->old_name ? patch->old_name : patch->new_name;
+ if (patch->is_new)
+ sha1_ptr = null_sha1;
+ else if (get_sha1(patch->old_sha1_prefix, sha1))
+ die("sha1 information is lacking or useless (%s).",
+ name);
+ else
+ sha1_ptr = sha1;
+
+ printf("%06o %s ",patch->old_mode, sha1_to_hex(sha1_ptr));
+ if (line_termination && quote_c_style(name, NULL, NULL, 0))
+ quote_c_style(name, NULL, stdout, 0);
+ else
+ fputs(name, stdout);
+ putchar(line_termination);
}
}
printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels);
}
+static void numstat_patch_list(struct patch *patch)
+{
+ for ( ; patch; patch = patch->next) {
+ const char *name;
+ name = patch->old_name ? patch->old_name : patch->new_name;
+ printf("%d\t%d\t", patch->lines_added, patch->lines_deleted);
+ if (line_termination && quote_c_style(name, NULL, NULL, 0))
+ quote_c_style(name, NULL, stdout, 0);
+ else
+ fputs(name, stdout);
+ putchar('\n');
+ }
+}
+
+static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
+{
+ if (mode)
+ printf(" %s mode %06o %s\n", newdelete, mode, name);
+ else
+ printf(" %s %s\n", newdelete, name);
+}
+
+static void show_mode_change(struct patch *p, int show_name)
+{
+ if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
+ if (show_name)
+ printf(" mode change %06o => %06o %s\n",
+ p->old_mode, p->new_mode, p->new_name);
+ else
+ printf(" mode change %06o => %06o\n",
+ p->old_mode, p->new_mode);
+ }
+}
+
+static void show_rename_copy(struct patch *p)
+{
+ const char *renamecopy = p->is_rename ? "rename" : "copy";
+ const char *old, *new;
+
+ /* Find common prefix */
+ old = p->old_name;
+ new = p->new_name;
+ 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->old_name thru old is the common prefix, and old and new
+ * through the end of names are renames
+ */
+ if (old != p->old_name)
+ printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
+ (int)(old - p->old_name), p->old_name,
+ old, new, p->score);
+ else
+ printf(" %s %s => %s (%d%%)\n", renamecopy,
+ p->old_name, p->new_name, p->score);
+ show_mode_change(p, 0);
+}
+
+static void summary_patch_list(struct patch *patch)
+{
+ struct patch *p;
+
+ for (p = patch; p; p = p->next) {
+ if (p->is_new)
+ show_file_mode_name("create", p->new_mode, p->new_name);
+ else if (p->is_delete)
+ show_file_mode_name("delete", p->old_mode, p->old_name);
+ else {
+ if (p->is_rename || p->is_copy)
+ show_rename_copy(p);
+ else {
+ if (p->score) {
+ printf(" rewrite %s (%d%%)\n",
+ p->new_name, p->score);
+ show_mode_change(p, 0);
+ }
+ else
+ show_mode_change(p, 1);
+ }
+ }
+ }
+}
+
static void patch_stats(struct patch *patch)
{
int lines = patch->lines_added + patch->lines_deleted;
if (lines > max_change)
max_change = lines;
if (patch->old_name) {
- int len = strlen(patch->old_name);
+ int len = quote_c_style(patch->old_name, NULL, NULL, 0);
+ if (!len)
+ len = strlen(patch->old_name);
if (len > max_len)
max_len = len;
}
if (patch->new_name) {
- int len = strlen(patch->new_name);
+ int len = quote_c_style(patch->new_name, NULL, NULL, 0);
+ if (!len)
+ len = strlen(patch->new_name);
if (len > max_len)
max_len = len;
}
}
+static void remove_file(struct patch *patch)
+{
+ if (write_index) {
+ if (remove_file_from_cache(patch->old_name) < 0)
+ die("unable to remove %s from index", patch->old_name);
+ }
+ unlink(patch->old_name);
+}
+
+static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size)
+{
+ struct stat st;
+ struct cache_entry *ce;
+ int namelen = strlen(path);
+ unsigned ce_size = cache_entry_size(namelen);
+
+ if (!write_index)
+ return;
+
+ ce = xmalloc(ce_size);
+ memset(ce, 0, ce_size);
+ memcpy(ce->name, path, namelen);
+ ce->ce_mode = create_ce_mode(mode);
+ ce->ce_flags = htons(namelen);
+ if (lstat(path, &st) < 0)
+ die("unable to stat newly created file %s", path);
+ fill_stat_cache_info(ce, &st);
+ if (write_sha1_file(buf, size, "blob", ce->sha1) < 0)
+ die("unable to create backing store for newly created file %s", path);
+ if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
+ die("unable to add cache entry for %s", path);
+}
+
+static void create_subdirectories(const char *path)
+{
+ int len = strlen(path);
+ char *buf = xmalloc(len + 1);
+ const char *slash = path;
+
+ while ((slash = strchr(slash+1, '/')) != NULL) {
+ len = slash - path;
+ memcpy(buf, path, len);
+ buf[len] = 0;
+ if (mkdir(buf, 0777) < 0) {
+ if (errno != EEXIST)
+ break;
+ }
+ }
+ free(buf);
+}
+
+static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size)
+{
+ int fd;
+
+ if (S_ISLNK(mode))
+ return symlink(buf, path);
+ fd = open(path, O_CREAT | O_EXCL | O_WRONLY | O_TRUNC, (mode & 0100) ? 0777 : 0666);
+ if (fd < 0)
+ return -1;
+ while (size) {
+ int written = write(fd, buf, size);
+ if (written < 0) {
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+ die("writing file %s: %s", path, strerror(errno));
+ }
+ if (!written)
+ die("out of space writing file %s", path);
+ buf += written;
+ size -= written;
+ }
+ if (close(fd) < 0)
+ die("closing file %s: %s", path, strerror(errno));
+ return 0;
+}
+
+/*
+ * We optimistically assume that the directories exist,
+ * which is true 99% of the time anyway. If they don't,
+ * we create them and try again.
+ */
+static void create_one_file(const char *path, unsigned mode, const char *buf, unsigned long size)
+{
+ if (!try_create_file(path, mode, buf, size))
+ return;
+
+ if (errno == ENOENT) {
+ create_subdirectories(path);
+ if (!try_create_file(path, mode, buf, size))
+ return;
+ }
+
+ if (errno == EEXIST) {
+ unsigned int nr = getpid();
+
+ for (;;) {
+ const char *newpath;
+ newpath = mkpath("%s~%u", path, nr);
+ if (!try_create_file(newpath, mode, buf, size)) {
+ if (!rename(newpath, path))
+ return;
+ unlink(newpath);
+ break;
+ }
+ if (errno != EEXIST)
+ break;
+ }
+ }
+ die("unable to write file %s mode %o", path, mode);
+}
+
+static void create_file(struct patch *patch)
+{
+ const char *path = patch->new_name;
+ unsigned mode = patch->new_mode;
+ unsigned long size = patch->resultsize;
+ char *buf = patch->result;
+
+ if (!mode)
+ mode = S_IFREG | 0644;
+ create_one_file(path, mode, buf, size);
+ add_index_file(path, mode, buf, size);
+}
+
+static void write_out_one_result(struct patch *patch)
+{
+ if (patch->is_delete > 0) {
+ remove_file(patch);
+ return;
+ }
+ if (patch->is_new > 0 || patch->is_copy) {
+ create_file(patch);
+ return;
+ }
+ /*
+ * Rename or modification boils down to the same
+ * thing: remove the old, write the new
+ */
+ remove_file(patch);
+ create_file(patch);
+}
+
+static void write_out_results(struct patch *list, int skipped_patch)
+{
+ if (!list && !skipped_patch)
+ die("No changes");
+
+ while (list) {
+ write_out_one_result(list);
+ list = list->next;
+ }
+}
+
+static struct cache_file cache_file;
+
+static struct excludes {
+ struct excludes *next;
+ const char *path;
+} *excludes;
+
+static int use_patch(struct patch *p)
+{
+ const char *pathname = p->new_name ? p->new_name : p->old_name;
+ struct excludes *x = excludes;
+ while (x) {
+ if (fnmatch(x->path, pathname, 0) == 0)
+ return 0;
+ x = x->next;
+ }
+ return 1;
+}
+
static int apply_patch(int fd)
{
+ int newfd;
unsigned long offset, size;
char *buffer = read_patch_file(fd, &size);
struct patch *list = NULL, **listp = &list;
+ int skipped_patch = 0;
if (!buffer)
return -1;
nr = parse_chunk(buffer + offset, size, patch);
if (nr < 0)
break;
- patch_stats(patch);
- *listp = patch;
- listp = &patch->next;
+ if (use_patch(patch)) {
+ patch_stats(patch);
+ *listp = patch;
+ listp = &patch->next;
+ } else {
+ /* perhaps free it a bit better? */
+ free(patch);
+ skipped_patch++;
+ }
offset += nr;
size -= nr;
}
+ newfd = -1;
+ write_index = check_index && apply;
+ if (write_index)
+ newfd = hold_index_file_for_update(&cache_file, get_index_file());
+ if (check_index) {
+ if (read_cache() < 0)
+ die("unable to read index file");
+ }
+
if ((check || apply) && check_patch_list(list) < 0)
exit(1);
- if (show_files)
- show_file_list(list);
+ if (apply)
+ write_out_results(list, skipped_patch);
+
+ if (write_index) {
+ if (write_cache(newfd, active_cache, active_nr) ||
+ commit_index_file(&cache_file))
+ die("Unable to write new cachefile");
+ }
+
+ if (show_index_info)
+ show_index_list(list);
if (diffstat)
stat_patch_list(list);
+ if (numstat)
+ numstat_patch_list(list);
+
+ if (summary)
+ summary_patch_list(list);
+
free(buffer);
return 0;
}
int i;
int read_stdin = 1;
- if (read_cache() < 0)
- die("unable to read index file");
-
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
int fd;
read_stdin = 0;
continue;
}
- if (!strcmp(arg, "--no-merge")) {
- merge_patch = 0;
+ if (!strncmp(arg, "--exclude=", 10)) {
+ struct excludes *x = xmalloc(sizeof(*x));
+ x->path = arg + 10;
+ x->next = excludes;
+ excludes = x;
+ continue;
+ }
+ if (!strcmp(arg, "--no-add")) {
+ no_add = 1;
continue;
}
if (!strcmp(arg, "--stat")) {
diffstat = 1;
continue;
}
+ if (!strcmp(arg, "--allow-binary-replacement")) {
+ allow_binary_replacement = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--numstat")) {
+ apply = 0;
+ numstat = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--summary")) {
+ apply = 0;
+ summary = 1;
+ continue;
+ }
if (!strcmp(arg, "--check")) {
apply = 0;
check = 1;
continue;
}
- if (!strcmp(arg, "--show-files")) {
- show_files = 1;
+ if (!strcmp(arg, "--index")) {
+ check_index = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--apply")) {
+ apply = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--index-info")) {
+ apply = 0;
+ show_index_info = 1;
+ continue;
+ }
+ if (!strcmp(arg, "-z")) {
+ line_termination = 0;
continue;
}
fd = open(arg, O_RDONLY);