path: root/archive.c
diff options
authorScott J. Goldman <>2014-02-28 10:04:19 (GMT)
committerJunio C Hamano <>2014-02-28 17:55:37 (GMT)
commit7671b63211712e5163ed46d4c93d0b75680c886c (patch)
tree7de8871a0ebc22a47a81410fb6e1e34fe326f879 /archive.c
parent69897bc2b8b49c09190cce065c027612b21c2d97 (diff)
add uploadarchive.allowUnreachable option
In commit ee27ca4, we started restricting remote git-archive invocations to only accessing reachable commits. This matches what upload-pack allows, but does restrict some useful cases (e.g., HEAD:foo). We loosened this in 0f544ee, which allows `foo:bar` as long as `foo` is a ref tip. However, that still doesn't allow many useful things, like: 1. Commits accessible from a ref, like `foo^:bar`, which are reachable 2. Arbitrary sha1s, even if they are reachable. We can do a full object-reachability check for these cases, but it can be quite expensive if the client has sent us the sha1 of a tree; we have to visit every sub-tree of every commit in the worst case. Let's instead give site admins an escape hatch, in case they prefer the more liberal behavior. For many sites, the full object database is public anyway (e.g., if you allow dumb walker access), or the site admin may simply decide the security/convenience tradeoff is not worth it. This patch adds a new config option to disable the restrictions added in ee27ca4. It defaults to off, meaning there is no change in behavior by default. Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'archive.c')
1 files changed, 11 insertions, 2 deletions
diff --git a/archive.c b/archive.c
index 346f3b2..7d0976f 100644
--- a/archive.c
+++ b/archive.c
@@ -17,6 +17,7 @@ static char const * const archive_usage[] = {
static const struct archiver **archivers;
static int nr_archivers;
static int alloc_archivers;
+static int remote_allow_unreachable;
void register_archiver(struct archiver *ar)
@@ -257,7 +258,7 @@ static void parse_treeish_arg(const char **argv,
unsigned char sha1[20];
/* Remotes are only allowed to fetch actual refs */
- if (remote) {
+ if (remote && !remote_allow_unreachable) {
char *ref = NULL;
const char *colon = strchr(name, ':');
int refnamelen = colon ? colon - name : strlen(name);
@@ -401,6 +402,14 @@ static int parse_archive_args(int argc, const char **argv,
return argc;
+static int git_default_archive_config(const char *var, const char *value,
+ void *cb)
+ if (!strcmp(var, "uploadarchive.allowunreachable"))
+ remote_allow_unreachable = git_config_bool(var, value);
+ return git_default_config(var, value, cb);
int write_archive(int argc, const char **argv, const char *prefix,
int setup_prefix, const char *name_hint, int remote)
@@ -411,7 +420,7 @@ int write_archive(int argc, const char **argv, const char *prefix,
if (setup_prefix && prefix == NULL)
prefix = setup_git_directory_gently(&nongit);
- git_config(git_default_config, NULL);
+ git_config(git_default_archive_config, NULL);