X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=sha1_file.c;h=fa22e9c71a0360ad5c3a865e0d6b3b49ba97e064;hb=8d712aafd2df3c1f5147a28947f98cefe667cf76;hp=82a01887c261676eb39fe72b108bfa56041d71f5;hpb=069b20a198f171512a1d2d2163b40f70c94f5257;p=git.git

diff --git a/sha1_file.c b/sha1_file.c
index 82a01887..fa22e9c7 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -184,8 +184,8 @@ static struct alternate_object_database **alt_odb_tail;
  * alternate_object_database.  The elements on this list come from
  * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT
  * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates,
- * whose contents is exactly in the same format as that environment
- * variable.  Its base points at a statically allocated buffer that
+ * whose contents is similar to that environment variable but can be
+ * LF separated.  Its base points at a statically allocated buffer that
  * contains "/the/directory/corresponding/to/.git/objects/...", while
  * its name points just after the slash at the end of ".git/objects/"
  * in the example above, and has enough space to hold 40-byte hex
@@ -197,6 +197,7 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
 {
 	const char *cp, *last;
 	struct alternate_object_database *ent;
+	const char *objdir = get_object_directory();
 	int base_len = -1;
 
 	last = alt;
@@ -211,6 +212,7 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
 		for ( ; cp < ep && *cp != sep; cp++)
 			;
 		if (last != cp) {
+			struct alternate_object_database *alt;
 			/* 43 = 40-byte + 2 '/' + terminating NUL */
 			int pfxlen = cp - last;
 			int entlen = pfxlen + 43;
@@ -223,9 +225,7 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
 				pfxlen += base_len;
 			}
 			ent = xmalloc(sizeof(*ent) + entlen);
-			*alt_odb_tail = ent;
-			alt_odb_tail = &(ent->next);
-			ent->next = NULL;
+
 			if (*last != '/' && relative_base) {
 				memcpy(ent->base, relative_base, base_len - 1);
 				ent->base[base_len - 1] = '/';
@@ -237,6 +237,22 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep,
 			ent->name = ent->base + pfxlen + 1;
 			ent->base[pfxlen] = ent->base[pfxlen + 3] = '/';
 			ent->base[entlen-1] = 0;
+
+			/* Prevent the common mistake of listing the same
+			 * thing twice, or object directory itself.
+			 */
+			for (alt = alt_odb_list; alt; alt = alt->next)
+				if (!memcmp(ent->base, alt->base, pfxlen))
+					goto bad;
+			if (!memcmp(ent->base, objdir, pfxlen)) {
+			bad:
+				free(ent);
+			}
+			else {
+				*alt_odb_tail = ent;
+				alt_odb_tail = &(ent->next);
+				ent->next = NULL;
+			}
 		}
 		while (cp < ep && *cp == sep)
 			cp++;
@@ -531,8 +547,9 @@ void prepare_packed_git(void)
 	prepare_packed_git_one(get_object_directory(), 1);
 	prepare_alt_odb();
 	for (alt = alt_odb_list; alt; alt = alt->next) {
-		alt->name[0] = 0;
+		alt->name[-1] = 0;
 		prepare_packed_git_one(alt->base, 0);
+		alt->name[-1] = '/';
 	}
 	run_once = 1;
 }
@@ -1511,6 +1528,40 @@ int has_sha1_file(const unsigned char *sha1)
 	return find_sha1_file(sha1, &st) ? 1 : 0;
 }
 
+int index_pipe(unsigned char *sha1, int fd, const char *type, int write_object)
+{
+	unsigned long size = 4096;
+	char *buf = malloc(size);
+	int iret, ret;
+	unsigned long off = 0;
+	unsigned char hdr[50];
+	int hdrlen;
+	do {
+		iret = read(fd, buf + off, size - off);
+		if (iret > 0) {
+			off += iret;
+			if (off == size) {
+				size *= 2;
+				buf = realloc(buf, size);
+			}
+		}
+	} while (iret > 0);
+	if (iret < 0) {
+		free(buf);
+		return -1;
+	}
+	if (!type)
+		type = "blob";
+	if (write_object)
+		ret = write_sha1_file(buf, off, type, sha1);
+	else {
+		write_sha1_file_prepare(buf, off, type, sha1, hdr, &hdrlen);
+		ret = 0;
+	}
+	free(buf);
+	return ret;
+}
+
 int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type)
 {
 	unsigned long size = st->st_size;