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Libify diff-index.
The second installment to libify diff brothers. The pathname arguments are checked more strictly than before because we now use the revision.c::setup_revisions() infrastructure. Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano
parent
6973dcaee7
commit
e09ad6e1e3
254
diff-index.c
254
diff-index.c
@ -1,166 +1,7 @@
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#include "cache.h"
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#include "cache.h"
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#include "tree.h"
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#include "diff.h"
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#include "diff.h"
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#include "commit.h"
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static int cached_only = 0;
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#include "revision.h"
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static int match_nonexisting = 0;
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static struct diff_options diff_options;
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/* A file entry went away or appeared */
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static void show_file(const char *prefix,
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struct cache_entry *ce,
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unsigned char *sha1, unsigned int mode)
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{
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diff_addremove(&diff_options, prefix[0], ntohl(mode),
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sha1, ce->name, NULL);
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}
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static int get_stat_data(struct cache_entry *ce,
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unsigned char ** sha1p, unsigned int *modep)
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{
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unsigned char *sha1 = ce->sha1;
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unsigned int mode = ce->ce_mode;
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if (!cached_only) {
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static unsigned char no_sha1[20];
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int changed;
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struct stat st;
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if (lstat(ce->name, &st) < 0) {
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if (errno == ENOENT && match_nonexisting) {
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*sha1p = sha1;
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*modep = mode;
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return 0;
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}
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return -1;
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}
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changed = ce_match_stat(ce, &st, 0);
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if (changed) {
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mode = create_ce_mode(st.st_mode);
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if (!trust_executable_bit && S_ISREG(st.st_mode))
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mode = ce->ce_mode;
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sha1 = no_sha1;
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}
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}
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*sha1p = sha1;
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*modep = mode;
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return 0;
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}
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static void show_new_file(struct cache_entry *new)
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{
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unsigned char *sha1;
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unsigned int mode;
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/* New file in the index: it might actually be different in
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* the working copy.
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*/
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if (get_stat_data(new, &sha1, &mode) < 0)
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return;
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show_file("+", new, sha1, mode);
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}
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static int show_modified(struct cache_entry *old,
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struct cache_entry *new,
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int report_missing)
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{
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unsigned int mode, oldmode;
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unsigned char *sha1;
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if (get_stat_data(new, &sha1, &mode) < 0) {
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if (report_missing)
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show_file("-", old, old->sha1, old->ce_mode);
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return -1;
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}
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oldmode = old->ce_mode;
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if (mode == oldmode && !memcmp(sha1, old->sha1, 20) &&
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!diff_options.find_copies_harder)
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return 0;
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mode = ntohl(mode);
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oldmode = ntohl(oldmode);
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diff_change(&diff_options, oldmode, mode,
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old->sha1, sha1, old->name, NULL);
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return 0;
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}
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static int diff_cache(struct cache_entry **ac, int entries, const char **pathspec)
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{
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while (entries) {
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struct cache_entry *ce = *ac;
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int same = (entries > 1) && ce_same_name(ce, ac[1]);
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if (!ce_path_match(ce, pathspec))
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goto skip_entry;
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switch (ce_stage(ce)) {
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case 0:
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/* No stage 1 entry? That means it's a new file */
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if (!same) {
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show_new_file(ce);
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break;
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}
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/* Show difference between old and new */
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show_modified(ac[1], ce, 1);
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break;
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case 1:
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/* No stage 3 (merge) entry? That means it's been deleted */
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if (!same) {
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show_file("-", ce, ce->sha1, ce->ce_mode);
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break;
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}
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/* We come here with ce pointing at stage 1
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* (original tree) and ac[1] pointing at stage
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* 3 (unmerged). show-modified with
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* report-missing set to false does not say the
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* file is deleted but reports true if work
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* tree does not have it, in which case we
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* fall through to report the unmerged state.
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* Otherwise, we show the differences between
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* the original tree and the work tree.
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*/
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if (!cached_only && !show_modified(ce, ac[1], 0))
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break;
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/* fallthru */
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case 3:
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diff_unmerge(&diff_options, ce->name);
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break;
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default:
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die("impossible cache entry stage");
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}
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skip_entry:
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/*
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* Ignore all the different stages for this file,
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* we've handled the relevant cases now.
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*/
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do {
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ac++;
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entries--;
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} while (entries && ce_same_name(ce, ac[0]));
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}
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return 0;
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}
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/*
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* This turns all merge entries into "stage 3". That guarantees that
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* when we read in the new tree (into "stage 1"), we won't lose sight
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* of the fact that we had unmerged entries.
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*/
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static void mark_merge_entries(void)
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{
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int i;
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for (i = 0; i < active_nr; i++) {
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struct cache_entry *ce = active_cache[i];
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if (!ce_stage(ce))
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continue;
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ce->ce_flags |= htons(CE_STAGEMASK);
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}
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}
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static const char diff_cache_usage[] =
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static const char diff_cache_usage[] =
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"git-diff-index [-m] [--cached] "
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"git-diff-index [-m] [--cached] "
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@ -169,85 +10,32 @@ COMMON_DIFF_OPTIONS_HELP;
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int main(int argc, const char **argv)
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int main(int argc, const char **argv)
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{
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{
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const char *tree_name = NULL;
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struct rev_info rev;
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unsigned char sha1[20];
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int match_missing = 0;
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const char *prefix = setup_git_directory();
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int cached = 0;
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const char **pathspec = NULL;
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struct tree *tree;
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int ret;
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int allow_options = 1;
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int i;
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int i;
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git_config(git_diff_config);
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git_config(git_diff_config);
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diff_setup(&diff_options);
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init_revisions(&rev);
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rev.abbrev = 0;
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argc = setup_revisions(argc, argv, &rev, NULL);
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for (i = 1; i < argc; i++) {
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for (i = 1; i < argc; i++) {
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const char *arg = argv[i];
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const char *arg = argv[i];
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int diff_opt_cnt;
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if (!allow_options || *arg != '-') {
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if (tree_name)
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break;
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tree_name = arg;
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continue;
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}
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if (!strcmp(arg, "--")) {
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if (!strcmp(arg, "-m"))
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allow_options = 0;
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match_missing = 1;
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continue;
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else if (!strcmp(arg, "--cached"))
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}
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cached = 1;
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if (!strcmp(arg, "-r")) {
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else
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/* We accept the -r flag just to look like git-diff-tree */
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continue;
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}
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if (!strcmp(arg, "--cc"))
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/*
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* I _think_ "diff-index --cached HEAD" with an
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* unmerged index could show something else
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* later, but pretend --cc is the same as -p for
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* now. "git diff" uses --cc by default.
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*/
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argv[i] = arg = "-p";
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diff_opt_cnt = diff_opt_parse(&diff_options, argv + i,
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argc - i);
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if (diff_opt_cnt < 0)
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usage(diff_cache_usage);
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usage(diff_cache_usage);
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else if (diff_opt_cnt) {
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i += diff_opt_cnt - 1;
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continue;
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}
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if (!strcmp(arg, "-m")) {
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match_nonexisting = 1;
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continue;
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}
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if (!strcmp(arg, "--cached")) {
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cached_only = 1;
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continue;
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}
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usage(diff_cache_usage);
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}
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}
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/*
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pathspec = get_pathspec(prefix, argv + i);
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* Make sure there is one revision (i.e. pending object),
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* and there is no revision filtering parameters.
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if (diff_setup_done(&diff_options) < 0)
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*/
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if (!rev.pending_objects || rev.pending_objects->next ||
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rev.max_count != -1 || rev.min_age != -1 || rev.max_age != -1)
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usage(diff_cache_usage);
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usage(diff_cache_usage);
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return run_diff_index(&rev, cached, match_missing);
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if (!tree_name || get_sha1(tree_name, sha1))
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usage(diff_cache_usage);
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read_cache();
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mark_merge_entries();
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tree = parse_tree_indirect(sha1);
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if (!tree)
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die("bad tree object %s", tree_name);
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if (read_tree(tree, 1, pathspec))
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die("unable to read tree object %s", tree_name);
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ret = diff_cache(active_cache, active_nr, pathspec);
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diffcore_std(&diff_options);
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diff_flush(&diff_options);
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return ret;
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}
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}
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203
diff-lib.c
203
diff-lib.c
@ -131,3 +131,206 @@ int run_diff_files(struct rev_info *revs, int silent_on_removed)
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return 0;
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return 0;
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}
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}
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/*
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* diff-index
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*/
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/* A file entry went away or appeared */
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static void diff_index_show_file(struct rev_info *revs,
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const char *prefix,
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struct cache_entry *ce,
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unsigned char *sha1, unsigned int mode)
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{
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diff_addremove(&revs->diffopt, prefix[0], ntohl(mode),
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sha1, ce->name, NULL);
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}
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static int get_stat_data(struct cache_entry *ce,
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unsigned char **sha1p,
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unsigned int *modep,
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int cached, int match_missing)
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{
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unsigned char *sha1 = ce->sha1;
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unsigned int mode = ce->ce_mode;
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if (!cached) {
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static unsigned char no_sha1[20];
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int changed;
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struct stat st;
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if (lstat(ce->name, &st) < 0) {
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if (errno == ENOENT && match_missing) {
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*sha1p = sha1;
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*modep = mode;
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return 0;
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}
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return -1;
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}
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changed = ce_match_stat(ce, &st, 0);
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if (changed) {
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mode = create_ce_mode(st.st_mode);
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if (!trust_executable_bit && S_ISREG(st.st_mode))
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mode = ce->ce_mode;
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sha1 = no_sha1;
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}
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}
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*sha1p = sha1;
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*modep = mode;
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return 0;
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}
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static void show_new_file(struct rev_info *revs,
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struct cache_entry *new,
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int cached, int match_missing)
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{
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unsigned char *sha1;
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unsigned int mode;
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/* New file in the index: it might actually be different in
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* the working copy.
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*/
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if (get_stat_data(new, &sha1, &mode, cached, match_missing) < 0)
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return;
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diff_index_show_file(revs, "+", new, sha1, mode);
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}
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static int show_modified(struct rev_info *revs,
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struct cache_entry *old,
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struct cache_entry *new,
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int report_missing,
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int cached, int match_missing)
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{
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unsigned int mode, oldmode;
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unsigned char *sha1;
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if (get_stat_data(new, &sha1, &mode, cached, match_missing) < 0) {
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if (report_missing)
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diff_index_show_file(revs, "-", old,
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old->sha1, old->ce_mode);
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return -1;
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}
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oldmode = old->ce_mode;
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if (mode == oldmode && !memcmp(sha1, old->sha1, 20) &&
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!revs->diffopt.find_copies_harder)
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return 0;
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mode = ntohl(mode);
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oldmode = ntohl(oldmode);
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diff_change(&revs->diffopt, oldmode, mode,
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old->sha1, sha1, old->name, NULL);
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return 0;
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|
}
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|
static int diff_cache(struct rev_info *revs,
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struct cache_entry **ac, int entries,
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|
const char **pathspec,
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|
int cached, int match_missing)
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{
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|
while (entries) {
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struct cache_entry *ce = *ac;
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int same = (entries > 1) && ce_same_name(ce, ac[1]);
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|
if (!ce_path_match(ce, pathspec))
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goto skip_entry;
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switch (ce_stage(ce)) {
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case 0:
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/* No stage 1 entry? That means it's a new file */
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if (!same) {
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show_new_file(revs, ce, cached, match_missing);
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break;
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}
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/* Show difference between old and new */
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show_modified(revs,ac[1], ce, 1,
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cached, match_missing);
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break;
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case 1:
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/* No stage 3 (merge) entry?
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* That means it's been deleted.
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*/
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if (!same) {
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diff_index_show_file(revs, "-", ce,
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ce->sha1, ce->ce_mode);
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break;
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}
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|
/* We come here with ce pointing at stage 1
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|
* (original tree) and ac[1] pointing at stage
|
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|
* 3 (unmerged). show-modified with
|
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|
* report-missing set to false does not say the
|
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|
* file is deleted but reports true if work
|
||||||
|
* tree does not have it, in which case we
|
||||||
|
* fall through to report the unmerged state.
|
||||||
|
* Otherwise, we show the differences between
|
||||||
|
* the original tree and the work tree.
|
||||||
|
*/
|
||||||
|
if (!cached &&
|
||||||
|
!show_modified(revs, ce, ac[1], 0,
|
||||||
|
cached, match_missing))
|
||||||
|
break;
|
||||||
|
/* fallthru */
|
||||||
|
case 3:
|
||||||
|
diff_unmerge(&revs->diffopt, ce->name);
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
die("impossible cache entry stage");
|
||||||
|
}
|
||||||
|
|
||||||
|
skip_entry:
|
||||||
|
/*
|
||||||
|
* Ignore all the different stages for this file,
|
||||||
|
* we've handled the relevant cases now.
|
||||||
|
*/
|
||||||
|
do {
|
||||||
|
ac++;
|
||||||
|
entries--;
|
||||||
|
} while (entries && ce_same_name(ce, ac[0]));
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* This turns all merge entries into "stage 3". That guarantees that
|
||||||
|
* when we read in the new tree (into "stage 1"), we won't lose sight
|
||||||
|
* of the fact that we had unmerged entries.
|
||||||
|
*/
|
||||||
|
static void mark_merge_entries(void)
|
||||||
|
{
|
||||||
|
int i;
|
||||||
|
for (i = 0; i < active_nr; i++) {
|
||||||
|
struct cache_entry *ce = active_cache[i];
|
||||||
|
if (!ce_stage(ce))
|
||||||
|
continue;
|
||||||
|
ce->ce_flags |= htons(CE_STAGEMASK);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int run_diff_index(struct rev_info *revs, int cached, int match_missing)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
struct object *ent;
|
||||||
|
struct tree *tree;
|
||||||
|
const char *tree_name;
|
||||||
|
|
||||||
|
if (read_cache() < 0) {
|
||||||
|
perror("read_cache");
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
mark_merge_entries();
|
||||||
|
|
||||||
|
ent = revs->pending_objects->item;
|
||||||
|
tree_name = revs->pending_objects->name;
|
||||||
|
tree = parse_tree_indirect(ent->sha1);
|
||||||
|
if (!tree)
|
||||||
|
return error("bad tree object %s", tree_name);
|
||||||
|
if (read_tree(tree, 1, revs->prune_data))
|
||||||
|
return error("unable to read tree object %s", tree_name);
|
||||||
|
ret = diff_cache(revs, active_cache, active_nr, revs->prune_data,
|
||||||
|
cached, match_missing);
|
||||||
|
diffcore_std(&revs->diffopt);
|
||||||
|
diff_flush(&revs->diffopt);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|||||||
2
diff.h
2
diff.h
@ -171,4 +171,6 @@ extern const char *diff_unique_abbrev(const unsigned char *, int);
|
|||||||
|
|
||||||
extern int run_diff_files(struct rev_info *revs, int silent_on_removed);
|
extern int run_diff_files(struct rev_info *revs, int silent_on_removed);
|
||||||
|
|
||||||
|
extern int run_diff_index(struct rev_info *revs, int cached, int match_missing);
|
||||||
|
|
||||||
#endif /* DIFF_H */
|
#endif /* DIFF_H */
|
||||||
|
|||||||
@ -28,7 +28,7 @@ cat >expected <<\EOF
|
|||||||
EOF
|
EOF
|
||||||
test_expect_success \
|
test_expect_success \
|
||||||
'limit to path should show nothing' \
|
'limit to path should show nothing' \
|
||||||
'git-diff-index --cached $tree path >current &&
|
'git-diff-index --cached $tree -- path >current &&
|
||||||
compare_diff_raw current expected'
|
compare_diff_raw current expected'
|
||||||
|
|
||||||
cat >expected <<\EOF
|
cat >expected <<\EOF
|
||||||
@ -36,7 +36,7 @@ cat >expected <<\EOF
|
|||||||
EOF
|
EOF
|
||||||
test_expect_success \
|
test_expect_success \
|
||||||
'limit to path1 should show path1/file1' \
|
'limit to path1 should show path1/file1' \
|
||||||
'git-diff-index --cached $tree path1 >current &&
|
'git-diff-index --cached $tree -- path1 >current &&
|
||||||
compare_diff_raw current expected'
|
compare_diff_raw current expected'
|
||||||
|
|
||||||
cat >expected <<\EOF
|
cat >expected <<\EOF
|
||||||
@ -44,7 +44,7 @@ cat >expected <<\EOF
|
|||||||
EOF
|
EOF
|
||||||
test_expect_success \
|
test_expect_success \
|
||||||
'limit to path1/ should show path1/file1' \
|
'limit to path1/ should show path1/file1' \
|
||||||
'git-diff-index --cached $tree path1/ >current &&
|
'git-diff-index --cached $tree -- path1/ >current &&
|
||||||
compare_diff_raw current expected'
|
compare_diff_raw current expected'
|
||||||
|
|
||||||
cat >expected <<\EOF
|
cat >expected <<\EOF
|
||||||
@ -52,14 +52,14 @@ cat >expected <<\EOF
|
|||||||
EOF
|
EOF
|
||||||
test_expect_success \
|
test_expect_success \
|
||||||
'limit to file0 should show file0' \
|
'limit to file0 should show file0' \
|
||||||
'git-diff-index --cached $tree file0 >current &&
|
'git-diff-index --cached $tree -- file0 >current &&
|
||||||
compare_diff_raw current expected'
|
compare_diff_raw current expected'
|
||||||
|
|
||||||
cat >expected <<\EOF
|
cat >expected <<\EOF
|
||||||
EOF
|
EOF
|
||||||
test_expect_success \
|
test_expect_success \
|
||||||
'limit to file0/ should emit nothing.' \
|
'limit to file0/ should emit nothing.' \
|
||||||
'git-diff-index --cached $tree file0/ >current &&
|
'git-diff-index --cached $tree -- file0/ >current &&
|
||||||
compare_diff_raw current expected'
|
compare_diff_raw current expected'
|
||||||
|
|
||||||
test_done
|
test_done
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user