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https://github.com/git/git
synced 2024-08-27 19:49:21 +00:00
git-apply: add "--check" option to check that the diff makes sense
It currently only verifies the index against the working directory, it doesn't actually verify the diff fragments themselves yet.
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parent
0e87e048e1
commit
a577284aee
110
apply.c
110
apply.c
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@ -17,11 +17,19 @@
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#include "cache.h"
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// We default to the merge behaviour, since that's what most people would
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// expect
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// expect.
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//
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// --check turns on checking that the working tree matches the
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// files that are being modified, but doesn't apply the patch
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// --stat does just a diffstat, and doesn't actually apply
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// --show-files shows the directory changes
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//
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static int merge_patch = 1;
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static int diffstat = 0;
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static int check = 1;
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static const char apply_usage[] = "git-apply <patch>";
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static int check = 0;
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static int apply = 1;
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static int show_files = 0;
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static const char apply_usage[] = "git-apply [--stat] [--check] [--show-files] <patch>";
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/*
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* For "diff-stat" like behaviour, we keep track of the biggest change
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@ -723,43 +731,89 @@ static void show_stats(struct patch *patch)
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add, pluses, del, minuses);
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}
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static void check_patch(struct patch *patch)
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static int check_patch(struct patch *patch)
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{
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struct stat st;
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const char *old_name = patch->old_name;
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const char *new_name = patch->new_name;
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if (old_name) {
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if (cache_name_pos(old_name, strlen(old_name)) < 0)
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die("file %s does not exist", old_name);
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int pos = cache_name_pos(old_name, strlen(old_name));
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int changed;
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if (pos < 0)
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return error("%s: does not exist in index", old_name);
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if (patch->is_new < 0)
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patch->is_new = 0;
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if (lstat(old_name, &st) < 0)
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return error("%s: %s\n", strerror(errno));
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changed = ce_match_stat(active_cache[pos], &st);
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if (changed)
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return error("%s: does not match index", old_name);
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if (!patch->old_mode)
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patch->old_mode = st.st_mode;
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}
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if (new_name && (patch->is_new | patch->is_rename | patch->is_copy)) {
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if (cache_name_pos(new_name, strlen(new_name)) >= 0)
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die("file %s already exists", new_name);
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return error("%s: already exists in index", new_name);
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if (!lstat(new_name, &st))
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return error("%s: already exists in working directory", new_name);
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if (errno != ENOENT)
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return error("%s: %s", new_name, strerror(errno));
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}
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return 0;
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}
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static int check_patch_list(struct patch *patch)
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{
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int error = 0;
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for (;patch ; patch = patch->next)
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error |= check_patch(patch);
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return error;
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}
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static void show_file(int c, unsigned int mode, const char *name)
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{
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printf("%c %o %s\n", c, mode, name);
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}
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static void show_file_list(struct patch *patch)
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{
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for (;patch ; patch = patch->next) {
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if (patch->is_rename) {
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show_file('-', patch->old_mode, patch->old_name);
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show_file('+', patch->new_mode, patch->new_name);
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continue;
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}
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if (patch->is_copy || patch->is_new) {
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show_file('+', patch->new_mode, patch->new_name);
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continue;
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}
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if (patch->is_delete) {
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show_file('-', patch->old_mode, patch->old_name);
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continue;
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}
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if (patch->old_mode && patch->new_mode && patch->old_mode != patch->new_mode) {
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printf("M %o:%o %s\n", patch->old_mode, patch->new_mode, patch->old_name);
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continue;
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}
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printf("M %o %s\n", patch->old_mode, patch->old_name);
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}
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}
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static void apply_patch_list(struct patch *patch)
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static void stat_patch_list(struct patch *patch)
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{
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int files, adds, dels;
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files = adds = dels = 0;
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if (!patch)
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die("no patch found");
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do {
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if (check)
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check_patch(patch);
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if (diffstat) {
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for (files = adds = dels = 0 ; patch ; patch = patch->next) {
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files++;
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adds += patch->lines_added;
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dels += patch->lines_deleted;
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show_stats(patch);
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}
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} while ((patch = patch->next) != NULL);
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if (diffstat)
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printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels);
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}
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@ -806,7 +860,14 @@ static int apply_patch(int fd)
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size -= nr;
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}
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apply_patch_list(list);
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if ((check || apply) && check_patch_list(list) < 0)
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exit(1);
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if (show_files)
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show_file_list(list);
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if (diffstat)
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stat_patch_list(list);
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free(buffer);
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return 0;
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@ -834,10 +895,19 @@ int main(int argc, char **argv)
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continue;
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}
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if (!strcmp(arg, "--stat")) {
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check = 0;
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apply = 0;
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diffstat = 1;
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continue;
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}
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if (!strcmp(arg, "--check")) {
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apply = 0;
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check = 1;
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continue;
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}
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if (!strcmp(arg, "--show-files")) {
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show_files = 1;
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continue;
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}
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fd = open(arg, O_RDONLY);
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if (fd < 0)
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usage(apply_usage);
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