X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=write-tree.c;h=f866059f24bacd314fa4a979334a9893dbfc19ba;hb=a348ab702a84983c258e4961a58b1b9502f428c8;hp=b58871c7d9e7b3a3772831f2f9df04268e908987;hpb=c347ea5d6fc6bae6b6ea3196013c4df7ec4406a8;p=git.git

diff --git a/write-tree.c b/write-tree.c
index b58871c7..f866059f 100644
--- a/write-tree.c
+++ b/write-tree.c
@@ -5,44 +5,33 @@
  */
 #include "cache.h"
 
+static int missing_ok = 0;
+
 static int check_valid_sha1(unsigned char *sha1)
 {
-	char *filename = sha1_file_name(sha1);
 	int ret;
 
 	/* If we were anal, we'd check that the sha1 of the contents actually matches */
-	ret = access(filename, R_OK);
-	if (ret)
-		perror(filename);
-	return ret;
-}
-
-static int prepend_integer(char *buffer, unsigned val, int i)
-{
-	buffer[--i] = '\0';
-	do {
-		buffer[--i] = '0' + (val % 10);
-		val /= 10;
-	} while (val);
-	return i;
+	ret = has_sha1_file(sha1);
+	if (ret == 0)
+		perror(sha1_file_name(sha1));
+	return ret ? 0 : -1;
 }
 
-#define ORIG_OFFSET (40)	/* Enough space to add the header of "tree <size>\0" */
-
 static int write_tree(struct cache_entry **cachep, int maxentries, const char *base, int baselen, unsigned char *returnsha1)
 {
 	unsigned char subdir_sha1[20];
 	unsigned long size, offset;
 	char *buffer;
-	int i, nr;
+	int nr;
 
 	/* Guess at some random initial size */
 	size = 8192;
-	buffer = malloc(size);
-	offset = ORIG_OFFSET;
+	buffer = xmalloc(size);
+	offset = 0;
 
 	nr = 0;
-	do {
+	while (nr < maxentries) {
 		struct cache_entry *ce = cachep[nr];
 		const char *pathname = ce->name, *filename, *dirname;
 		int pathlen = ce_namelen(ce), entrylen;
@@ -74,59 +63,95 @@ static int write_tree(struct cache_entry **cachep, int maxentries, const char *b
 			sha1 = subdir_sha1;
 		}
 
-		if (check_valid_sha1(sha1) < 0)
+		if (!missing_ok && check_valid_sha1(sha1) < 0)
 			exit(1);
 
 		entrylen = pathlen - baselen;
 		if (offset + entrylen + 100 > size) {
 			size = alloc_nr(offset + entrylen + 100);
-			buffer = realloc(buffer, size);
+			buffer = xrealloc(buffer, size);
 		}
 		offset += sprintf(buffer + offset, "%o %.*s", mode, entrylen, filename);
 		buffer[offset++] = 0;
 		memcpy(buffer + offset, sha1, 20);
 		offset += 20;
 		nr++;
-	} while (nr < maxentries);
-
-	i = prepend_integer(buffer, offset - ORIG_OFFSET, ORIG_OFFSET);
-	i -= 5;
-	memcpy(buffer+i, "tree ", 5);
-
-	buffer += i;
-	offset -= i;
+	}
 
-	write_sha1_file(buffer, offset, returnsha1);
+	write_sha1_file(buffer, offset, "tree", returnsha1);
+	free(buffer);
 	return nr;
 }
 
+static const char write_tree_usage[] = "git-write-tree [--missing-ok]";
+
 int main(int argc, char **argv)
 {
-	int i, unmerged;
-	int entries = read_cache();
+	int i, funny;
+	int entries;
 	unsigned char sha1[20];
+	
+	setup_git_directory();
+
+	entries = read_cache();
+	if (argc == 2) {
+		if (!strcmp(argv[1], "--missing-ok"))
+			missing_ok = 1;
+		else
+			die(write_tree_usage);
+	}
+	
+	if (argc > 2)
+		die("too many options");
 
-	if (entries <= 0)
-		die("write-tree: no cache contents to write");
+	if (entries < 0)
+		die("git-write-tree: error reading cache");
 
 	/* Verify that the tree is merged */
-	unmerged = 0;
+	funny = 0;
 	for (i = 0; i < entries; i++) {
 		struct cache_entry *ce = active_cache[i];
 		if (ntohs(ce->ce_flags) & ~CE_NAMEMASK) {
-			if (++unmerged > 10) {
+			if (10 < ++funny) {
 				fprintf(stderr, "...\n");
 				break;
 			}
 			fprintf(stderr, "%s: unmerged (%s)\n", ce->name, sha1_to_hex(ce->sha1));
 		}
 	}
-	if (unmerged)
-		die("write-tree: not able to write tree");
+	if (funny)
+		die("git-write-tree: not able to write tree");
+
+	/* Also verify that the cache does not have path and path/file
+	 * at the same time.  At this point we know the cache has only
+	 * stage 0 entries.
+	 */
+	funny = 0;
+	for (i = 0; i < entries - 1; i++) {
+		/* path/file always comes after path because of the way
+		 * the cache is sorted.  Also path can appear only once,
+		 * which means conflicting one would immediately follow.
+		 */
+		const char *this_name = active_cache[i]->name;
+		const char *next_name = active_cache[i+1]->name;
+		int this_len = strlen(this_name);
+		if (this_len < strlen(next_name) &&
+		    strncmp(this_name, next_name, this_len) == 0 &&
+		    next_name[this_len] == '/') {
+			if (10 < ++funny) {
+				fprintf(stderr, "...\n");
+				break;
+			}
+			fprintf(stderr, "You have both %s and %s\n",
+				this_name, next_name);
+		}
+	}
+	if (funny)
+		die("git-write-tree: not able to write tree");
 
 	/* Ok, write it out */
 	if (write_tree(active_cache, entries, "", 0, sha1) != entries)
-		die("write-tree: internal error");
+		die("git-write-tree: internal error");
 	printf("%s\n", sha1_to_hex(sha1));
 	return 0;
 }