1 files changed, 35 insertions, 20 deletions

diff --git a/fast-import.c b/fast-import.c
index 8d8ea3c45..4b9c4b73a 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -1143,17 +1143,11 @@ static int store_object(
 	return 0;
 }
 
-static void truncate_pack(off_t to, git_SHA_CTX *ctx)
+static void truncate_pack(struct sha1file_checkpoint *checkpoint)
 {
-	if (ftruncate(pack_data->pack_fd, to)
-	 || lseek(pack_data->pack_fd, to, SEEK_SET) != to)
+	if (sha1file_truncate(pack_file, checkpoint))
 		die_errno("cannot truncate pack to skip duplicate");
-	pack_size = to;
-
-	/* yes this is a layering violation */
-	pack_file->total = to;
-	pack_file->offset = 0;
-	pack_file->ctx = *ctx;
+	pack_size = checkpoint->offset;
 }
 
 static void stream_blob(uintmax_t len, unsigned char *sha1out, uintmax_t mark)
@@ -1166,8 +1160,8 @@ static void stream_blob(uintmax_t len, unsigned char *sha1out, uintmax_t mark)
 	unsigned long hdrlen;
 	off_t offset;
 	git_SHA_CTX c;
-	git_SHA_CTX pack_file_ctx;
 	git_zstream s;
+	struct sha1file_checkpoint checkpoint;
 	int status = Z_OK;
 
 	/* Determine if we should auto-checkpoint. */
@@ -1175,11 +1169,8 @@ static void stream_blob(uintmax_t len, unsigned char *sha1out, uintmax_t mark)
 		|| (pack_size + 60 + len) < pack_size)
 		cycle_packfile();
 
-	offset = pack_size;
-
-	/* preserve the pack_file SHA1 ctx in case we have to truncate later */
-	sha1flush(pack_file);
-	pack_file_ctx = pack_file->ctx;
+	sha1file_checkpoint(pack_file, &checkpoint);
+	offset = checkpoint.offset;
 
 	hdrlen = snprintf((char *)out_buf, out_sz, "blob %" PRIuMAX, len) + 1;
 	if (out_sz <= hdrlen)
@@ -1245,14 +1236,14 @@ static void stream_blob(uintmax_t len, unsigned char *sha1out, uintmax_t mark)
 
 	if (e->idx.offset) {
 		duplicate_count_by_type[OBJ_BLOB]++;
-		truncate_pack(offset, &pack_file_ctx);
+		truncate_pack(&checkpoint);
 
 	} else if (find_sha1_pack(sha1, packed_git)) {
 		e->type = OBJ_BLOB;
 		e->pack_id = MAX_PACK_ID;
 		e->idx.offset = 1; /* just not zero! */
 		duplicate_count_by_type[OBJ_BLOB]++;
-		truncate_pack(offset, &pack_file_ctx);
+		truncate_pack(&checkpoint);
 
 	} else {
 		e->depth = 0;
@@ -2173,6 +2164,11 @@ static uintmax_t do_change_note_fanout(
 
 		if (tmp_hex_sha1_len == 40 && !get_sha1_hex(hex_sha1, sha1)) {
 			/* This is a note entry */
+			if (fanout == 0xff) {
+				/* Counting mode, no rename */
+				num_notes++;
+				continue;
+			}
 			construct_path_with_fanout(hex_sha1, fanout, realpath);
 			if (!strcmp(fullpath, realpath)) {
 				/* Note entry is in correct location */
@@ -2379,7 +2375,7 @@ static void file_change_cr(struct branch *b, int rename)
 		leaf.tree);
 }
 
-static void note_change_n(struct branch *b, unsigned char old_fanout)
+static void note_change_n(struct branch *b, unsigned char *old_fanout)
 {
 	const char *p = command_buf.buf + 2;
 	static struct strbuf uq = STRBUF_INIT;
@@ -2390,6 +2386,23 @@ static void note_change_n(struct branch *b, unsigned char old_fanout)
 	uint16_t inline_data = 0;
 	unsigned char new_fanout;
 
+	/*
+	 * When loading a branch, we don't traverse its tree to count the real
+	 * number of notes (too expensive to do this for all non-note refs).
+	 * This means that recently loaded notes refs might incorrectly have
+	 * b->num_notes == 0, and consequently, old_fanout might be wrong.
+	 *
+	 * Fix this by traversing the tree and counting the number of notes
+	 * when b->num_notes == 0. If the notes tree is truly empty, the
+	 * calculation should not take long.
+	 */
+	if (b->num_notes == 0 && *old_fanout == 0) {
+		/* Invoke change_note_fanout() in "counting mode". */
+		b->num_notes = change_note_fanout(&b->branch_tree, 0xff);
+		*old_fanout = convert_num_notes_to_fanout(b->num_notes);
+	}
+
+	/* Now parse the notemodify command. */
 	/* <dataref> or 'inline' */
 	if (*p == ':') {
 		char *x;
@@ -2450,7 +2463,7 @@ static void note_change_n(struct branch *b, unsigned char old_fanout)
 			    typename(type), command_buf.buf);
 	}
 
-	construct_path_with_fanout(sha1_to_hex(commit_sha1), old_fanout, path);
+	construct_path_with_fanout(sha1_to_hex(commit_sha1), *old_fanout, path);
 	if (tree_content_remove(&b->branch_tree, path, NULL))
 		b->num_notes--;
 
@@ -2637,7 +2650,7 @@ static void parse_new_commit(void)
 		else if (!prefixcmp(command_buf.buf, "C "))
 			file_change_cr(b, 0);
 		else if (!prefixcmp(command_buf.buf, "N "))
-			note_change_n(b, prev_fanout);
+			note_change_n(b, &prev_fanout);
 		else if (!strcmp("deleteall", command_buf.buf))
 			file_change_deleteall(b);
 		else if (!prefixcmp(command_buf.buf, "ls "))
@@ -3292,6 +3305,8 @@ int main(int argc, const char **argv)
 
 	git_extract_argv0_path(argv[0]);
 
+	git_setup_gettext();
+
 	if (argc == 2 && !strcmp(argv[1], "-h"))
 		usage(fast_import_usage);