X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=diff-cache.c;h=3c8f9e0ee97ef678c707ad0d4f4f765ee268f11e;hb=6b14d7faf0bad026a81a27bac07b47691f621b8f;hp=5d43be60a46624283a47797bdc97c65aa6cf6dbe;hpb=a5cd7e16205f29c757ccd925d3f6ac8b5e6cc553;p=git.git

diff --git a/diff-cache.c b/diff-cache.c
index 5d43be60..3c8f9e0e 100644
--- a/diff-cache.c
+++ b/diff-cache.c
@@ -1,45 +1,84 @@
 #include "cache.h"
+#include "diff.h"
 
 static int cached_only = 0;
-static int line_termination = '\n';
+static int diff_output_format = DIFF_FORMAT_HUMAN;
+static int match_nonexisting = 0;
+static int detect_rename = 0;
+static int reverse_diff = 0;
+static int diff_score_opt = 0;
+static const char *pickaxe = NULL;
 
 /* A file entry went away or appeared */
-static void show_file(const char *prefix, struct cache_entry *ce)
+static void show_file(const char *prefix, struct cache_entry *ce, unsigned char *sha1, unsigned int mode)
 {
-	printf("%s%o\t%s\t%s\t%s%c", prefix, ntohl(ce->ce_mode), "blob",
-	       sha1_to_hex(ce->sha1), ce->name, line_termination);
+	diff_addremove(prefix[0], ntohl(mode), sha1, ce->name, NULL);
 }
 
-static int show_modified(struct cache_entry *old, struct cache_entry *new)
+static int get_stat_data(struct cache_entry *ce, unsigned char **sha1p, unsigned int *modep)
 {
-	unsigned int mode = ntohl(new->ce_mode), oldmode;
-	unsigned char *sha1 = new->sha1;
-	unsigned char old_sha1_hex[60];
+	unsigned char *sha1 = ce->sha1;
+	unsigned int mode = ce->ce_mode;
 
 	if (!cached_only) {
 		static unsigned char no_sha1[20];
 		int changed;
 		struct stat st;
-		if (stat(new->name, &st) < 0) {
-			show_file("-", old);
+		if (lstat(ce->name, &st) < 0) {
+			if (errno == ENOENT && match_nonexisting) {
+				*sha1p = sha1;
+				*modep = mode;
+				return 0;
+			}
 			return -1;
 		}
-		changed = cache_match_stat(new, &st);
+		changed = ce_match_stat(ce, &st);
 		if (changed) {
-			mode = st.st_mode;
+			mode = create_ce_mode(st.st_mode);
 			sha1 = no_sha1;
 		}
 	}
 
-	oldmode = ntohl(old->ce_mode);
-	if (mode == oldmode && !memcmp(sha1, old->sha1, 20))
+	*sha1p = sha1;
+	*modep = mode;
+	return 0;
+}
+
+static void show_new_file(struct cache_entry *new)
+{
+	unsigned char *sha1;
+	unsigned int mode;
+
+	/* New file in the index: it might actually be different in the working copy */
+	if (get_stat_data(new, &sha1, &mode) < 0)
+		return;
+
+	show_file("+", new, sha1, mode);
+}
+
+static int show_modified(struct cache_entry *old,
+			 struct cache_entry *new,
+			 int report_missing)
+{
+	unsigned int mode, oldmode;
+	unsigned char *sha1;
+
+	if (get_stat_data(new, &sha1, &mode) < 0) {
+		if (report_missing)
+			show_file("-", old, old->sha1, old->ce_mode);
+		return -1;
+	}
+
+	oldmode = old->ce_mode;
+	if (mode == oldmode && !memcmp(sha1, old->sha1, 20) &&
+	    detect_rename < DIFF_DETECT_COPY)
 		return 0;
 
-	strcpy(old_sha1_hex, sha1_to_hex(old->sha1));
-	printf("*%o->%o\t%s\t%s->%s\t%s%c", oldmode, mode,
-	       "blob",
-	       old_sha1_hex, sha1_to_hex(sha1),
-	       old->name, line_termination);
+	mode = ntohl(mode);
+	oldmode = ntohl(oldmode);
+
+	diff_change(oldmode, mode,
+		    old->sha1, sha1, old->name, NULL);
 	return 0;
 }
 
@@ -47,63 +86,120 @@ static int diff_cache(struct cache_entry **ac, int entries)
 {
 	while (entries) {
 		struct cache_entry *ce = *ac;
+		int same = (entries > 1) && ce_same_name(ce, ac[1]);
 
-		/* No matching 0-stage (current) entry? Show it as deleted */
-		if (ce_stage(ce)) {
-			show_file("-", ce);
-			ac++;
-			entries--;
-			continue;
+		switch (ce_stage(ce)) {
+		case 0:
+			/* No stage 1 entry? That means it's a new file */
+			if (!same) {
+				show_new_file(ce);
+				break;
+			}
+			/* Show difference between old and new */
+			show_modified(ac[1], ce, 1);
+			break;
+		case 1:
+			/* No stage 3 (merge) entry? That means it's been deleted */
+			if (!same) {
+				show_file("-", ce, ce->sha1, ce->ce_mode);
+				break;
+			}
+			/* We come here with ce pointing at stage 1
+			 * (original tree) and ac[1] pointing at stage
+			 * 3 (unmerged).  show-modified with
+			 * report-mising set to false does not say the
+			 * 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_only && !show_modified(ce, ac[1], 0))
+				break;
+			/* fallthru */
+		case 3:
+			diff_unmerge(ce->name);
+			break;
+
+		default:
+			die("impossible cache entry stage");
 		}
-		/* No matching 1-stage (tree) entry? Show the current one as added */
-		if (entries == 1 || !same_name(ce, ac[1])) {
-			show_file("+", ce);
+
+		/*
+		 * Ignore all the different stages for this file,
+		 * we've handled the relevant cases now.
+		 */
+		do {
 			ac++;
 			entries--;
-			continue;
-		}
-		show_modified(ac[1], ce);
-		ac += 2;
-		entries -= 2;
-		continue;
+		} while (entries && ce_same_name(ce, ac[0]));
 	}
 	return 0;
 }
 
-static void remove_merge_entries(void)
+/*
+ * 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;
-		printf("U %s%c", ce->name, line_termination);
-		while (remove_entry_at(i)) {
-			if (!ce_stage(active_cache[i]))
-				break;
-		}
+		ce->ce_flags |= htons(CE_STAGEMASK);
 	}
 }
 
-static char *diff_cache_usage = "diff-cache [-r] [-z] [--cached] <tree sha1>";
+static char *diff_cache_usage =
+"git-diff-cache [-p] [-r] [-z] [-m] [-M] [-C] [-R] [-S<string>] [--cached] <tree-ish>";
 
-int main(int argc, char **argv)
+int main(int argc, const char **argv)
 {
 	unsigned char tree_sha1[20];
 	void *tree;
 	unsigned long size;
+	int ret;
 
 	read_cache();
 	while (argc > 2) {
-		char *arg = argv[1];
+		const char *arg = argv[1];
 		argv++;
 		argc--;
 		if (!strcmp(arg, "-r")) {
-			/* We accept the -r flag just to look like diff-tree */
+			/* We accept the -r flag just to look like git-diff-tree */
+			continue;
+		}
+		if (!strcmp(arg, "-p")) {
+			diff_output_format = DIFF_FORMAT_PATCH;
+			continue;
+		}
+		if (!strncmp(arg, "-M", 2)) {
+			detect_rename = DIFF_DETECT_RENAME;
+			diff_score_opt = diff_scoreopt_parse(arg);
+			continue;
+		}
+		if (!strncmp(arg, "-C", 2)) {
+			detect_rename = DIFF_DETECT_COPY;
+			diff_score_opt = diff_scoreopt_parse(arg);
 			continue;
 		}
 		if (!strcmp(arg, "-z")) {
-			line_termination = '\0';
+			diff_output_format = DIFF_FORMAT_MACHINE;
+			continue;
+		}
+		if (!strcmp(arg, "-R")) {
+			reverse_diff = 1;
+			continue;
+		}
+		if (!strcmp(arg, "-S")) {
+			pickaxe = arg + 2;
+			continue;
+		}
+		if (!strcmp(arg, "-m")) {
+			match_nonexisting = 1;
 			continue;
 		}
 		if (!strcmp(arg, "--cached")) {
@@ -113,16 +209,31 @@ int main(int argc, char **argv)
 		usage(diff_cache_usage);
 	}
 
-	if (argc != 2 || get_sha1_hex(argv[1], tree_sha1))
+	if (argc < 2 || get_sha1(argv[1], tree_sha1))
 		usage(diff_cache_usage);
+	argv++;
+	argc--;
+
+	/* The rest is for paths restriction. */
+
+	diff_setup(reverse_diff);
 
-	remove_merge_entries();
+	mark_merge_entries();
 
-	tree = read_tree_with_tree_or_commit_sha1(tree_sha1, &size, 0);
+	tree = read_object_with_reference(tree_sha1, "tree", &size, NULL);
 	if (!tree)
 		die("bad tree object %s", argv[1]);
 	if (read_tree(tree, size, 1))
 		die("unable to read tree object %s", argv[1]);
 
-	return diff_cache(active_cache, active_nr);
+	ret = diff_cache(active_cache, active_nr);
+	if (detect_rename)
+		diffcore_rename(detect_rename, diff_score_opt);
+	diffcore_prune();
+	if (pickaxe)
+		diffcore_pickaxe(pickaxe);
+	if (2 <= argc)
+		diffcore_pathspec(argv + 1);
+	diff_flush(diff_output_format);
+	return ret;
 }