X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=pack-objects.c;h=ed24a33300e6baa2b64c5f6c28594494a0b3ebdf;hb=7421abfdbdfb34ad2719ce4fcf720450918cc4fc;hp=fc969e342a80c99a7455daf32696c828123ad1b9;hpb=01247d87421d621db3866ce7f2124784fc7f46e5;p=git.git

diff --git a/pack-objects.c b/pack-objects.c
index fc969e34..ed24a333 100644
--- a/pack-objects.c
+++ b/pack-objects.c
@@ -5,7 +5,7 @@
 #include "pack.h"
 #include "csum-file.h"
 
-static const char pack_usage[] = "git-pack-objects [--window=N] [--depth=N] {--stdout | base-name} < object-list";
+static const char pack_usage[] = "git-pack-objects [--incremental] [--window=N] [--depth=N] {--stdout | base-name} < object-list";
 
 struct object_entry {
 	unsigned char sha1[20];
@@ -18,6 +18,9 @@ struct object_entry {
 	struct object_entry *delta;
 };
 
+static unsigned char object_list_sha1[20];
+static int non_empty = 0;
+static int incremental = 0;
 static struct object_entry **sorted_by_sha, **sorted_by_type;
 static struct object_entry *objects = NULL;
 static int nr_objects = 0, nr_alloc = 0;
@@ -34,7 +37,7 @@ static void *delta_against(void *buf, unsigned long size, struct object_entry *e
 	if (!otherbuf)
 		die("unable to read %s", sha1_to_hex(entry->delta->sha1));
         delta_buf = diff_delta(otherbuf, othersize,
-			       buf, size, &delta_size, ~0UL);
+			       buf, size, &delta_size, 0);
         if (!delta_buf || delta_size != entry->delta_size)
         	die("delta size changed");
         free(buf);
@@ -133,7 +136,7 @@ static void write_pack_file(void)
 	if (!base_name)
 		f = sha1fd(1, "<stdout>");
 	else
-		f = sha1create("%s.%s", base_name, "pack");
+		f = sha1create("%s-%s.%s", base_name, sha1_to_hex(object_list_sha1), "pack");
 	hdr.hdr_signature = htonl(PACK_SIGNATURE);
 	hdr.hdr_version = htonl(PACK_VERSION);
 	hdr.hdr_entries = htonl(nr_objects);
@@ -150,7 +153,7 @@ static void write_pack_file(void)
 static void write_index_file(void)
 {
 	int i;
-	struct sha1file *f = sha1create("%s.%s", base_name, "idx");
+	struct sha1file *f = sha1create("%s-%s.%s", base_name, sha1_to_hex(object_list_sha1), "idx");
 	struct object_entry **list = sorted_by_sha;
 	struct object_entry **last = list + nr_objects;
 	unsigned int array[256];
@@ -187,11 +190,14 @@ static void write_index_file(void)
 	sha1close(f, NULL, 1);
 }
 
-static void add_object_entry(unsigned char *sha1, unsigned int hash)
+static int add_object_entry(unsigned char *sha1, unsigned int hash)
 {
 	unsigned int idx = nr_objects;
 	struct object_entry *entry;
 
+	if (incremental && has_sha1_pack(sha1))
+		return 0;
+
 	if (idx >= nr_alloc) {
 		unsigned int needed = (idx + 1024) * 3 / 2;
 		objects = xrealloc(objects, needed * sizeof(*entry));
@@ -202,6 +208,7 @@ static void add_object_entry(unsigned char *sha1, unsigned int hash)
 	memcpy(entry->sha1, sha1, 20);
 	entry->hash = hash;
 	nr_objects = idx+1;
+	return 1;
 }
 
 static void check_object(struct object_entry *entry)
@@ -379,6 +386,7 @@ static void find_deltas(struct object_entry **list, int window, int depth)
 
 int main(int argc, char **argv)
 {
+	SHA_CTX ctx;
 	char line[PATH_MAX + 20];
 	int window = 10, depth = 10, pack_to_stdout = 0;
 	int i;
@@ -387,6 +395,14 @@ int main(int argc, char **argv)
 		const char *arg = argv[i];
 
 		if (*arg == '-') {
+			if (!strcmp("--non-empty", arg)) {
+				non_empty = 1;
+				continue;
+			}
+			if (!strcmp("--incremental", arg)) {
+				incremental = 1;
+				continue;
+			}
 			if (!strncmp("--window=", arg, 9)) {
 				char *end;
 				window = strtoul(arg+9, &end, 0);
@@ -415,6 +431,7 @@ int main(int argc, char **argv)
 	if (pack_to_stdout != !base_name)
 		usage(pack_usage);
 
+	SHA1_Init(&ctx);
 	while (fgets(line, sizeof(line), stdin) != NULL) {
 		unsigned int hash;
 		char *p;
@@ -430,8 +447,12 @@ int main(int argc, char **argv)
 				continue;
 			hash = hash * 11 + c;
 		}
-		add_object_entry(sha1, hash);
+		if (add_object_entry(sha1, hash))
+			SHA1_Update(&ctx, sha1, 20);
 	}
+	SHA1_Final(object_list_sha1, &ctx);
+	if (non_empty && !nr_objects)
+		return 0;
 	get_object_details();
 
 	fprintf(stderr, "Packing %d objects\n", nr_objects);
@@ -442,7 +463,9 @@ int main(int argc, char **argv)
 		find_deltas(sorted_by_type, window+1, depth);
 
 	write_pack_file();
-	if (!pack_to_stdout)
+	if (!pack_to_stdout) {
 		write_index_file();
+		puts(sha1_to_hex(object_list_sha1));
+	}
 	return 0;
 }