X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=diff-cache.c;h=94c5f6654bdee04cf56adeb77b22ae998fdce678;hb=8ae0a8c514dc492de8aadf3ca6bb4ad55e33960e;hp=02762b90e03c16a6790f518a5431b3bad4c476e4;hpb=b0fe89caeb0c37405874bad66702f49ff4977972;p=git.git

diff --git a/diff-cache.c b/diff-cache.c
index 02762b90..94c5f665 100644
--- a/diff-cache.c
+++ b/diff-cache.c
@@ -1,45 +1,82 @@
 #include "cache.h"
+#include "diff.h"
 
 static int cached_only = 0;
+static int generate_patch = 0;
 static int line_termination = '\n';
 
 /* 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);
+	if (generate_patch)
+		diff_addremove(prefix[0], ntohl(mode), sha1, ce->name, NULL);
+	else
+		printf("%s%06o\tblob\t%s\t%s%c", prefix, ntohl(mode),
+		       sha1_to_hex(sha1), ce->name, line_termination);
 }
 
-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)
 			return -1;
-		}
-		changed = cache_match_stat(new, &st);
+		changed = cache_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);
+	*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)
+{
+	unsigned int mode, oldmode;
+	unsigned char *sha1;
+	unsigned char old_sha1_hex[60];
+
+	if (get_stat_data(new, &sha1, &mode) < 0) {
+		show_file("-", old, old->sha1, old->ce_mode);
+		return -1;
+	}
+
+	oldmode = old->ce_mode;
 	if (mode == oldmode && !memcmp(sha1, old->sha1, 20))
 		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);
+
+	if (generate_patch)
+		diff_change(oldmode, mode,
+			    old->sha1, sha1, old->name, NULL);
+	else {
+		strcpy(old_sha1_hex, sha1_to_hex(old->sha1));
+		printf("*%06o->%06o\tblob\t%s->%s\t%s%c", oldmode, mode,
+		       old_sha1_hex, sha1_to_hex(sha1),
+		       old->name, line_termination);
+	}
 	return 0;
 }
 
@@ -53,7 +90,7 @@ static int diff_cache(struct cache_entry **ac, int entries)
 		case 0:
 			/* No stage 1 entry? That means it's a new file */
 			if (!same) {
-				show_file("+", ce);
+				show_new_file(ce);
 				break;
 			}
 			/* Show difference between old and new */
@@ -62,12 +99,15 @@ static int diff_cache(struct cache_entry **ac, int entries)
 		case 1:
 			/* No stage 3 (merge) entry? That means it's been deleted */
 			if (!same) {
-				show_file("-", ce);
+				show_file("-", ce, ce->sha1, ce->ce_mode);
 				break;
 			}
 			/* Otherwise we fall through to the "unmerged" case */
 		case 3:
-			printf("U %s%c", ce->name, line_termination);
+			if (generate_patch)
+				diff_unmerge(ce->name);
+			else
+				printf("U %s%c", ce->name, line_termination);
 			break;
 
 		default:
@@ -102,7 +142,8 @@ static void mark_merge_entries(void)
 	}
 }
 
-static char *diff_cache_usage = "diff-cache [-r] [-z] [--cached] <tree sha1>";
+static char *diff_cache_usage =
+"diff-cache [-r] [-z] [-p] [--cached] <tree sha1>";
 
 int main(int argc, char **argv)
 {
@@ -119,6 +160,10 @@ int main(int argc, char **argv)
 			/* We accept the -r flag just to look like diff-tree */
 			continue;
 		}
+		if (!strcmp(arg, "-p")) {
+			generate_patch = 1;
+			continue;
+		}
 		if (!strcmp(arg, "-z")) {
 			line_termination = '\0';
 			continue;
@@ -130,12 +175,12 @@ 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);
 
 	mark_merge_entries();
 
-	tree = read_tree_with_tree_or_commit_sha1(tree_sha1, &size, 0);
+	tree = read_object_with_reference(tree_sha1, "tree", &size, 0);
 	if (!tree)
 		die("bad tree object %s", argv[1]);
 	if (read_tree(tree, size, 1))