Existing "git push --all" is almost perfect for backing up to
another repository, except that "--all" only means "all
branches" in modern git, and it does not delete old branches and
tags that exist at the back-up repository that you have removed
from your local repository.
This teaches "git-send-pack" a new "--mirror" option. The
difference from the "--all" option are that (1) it sends all
refs, not just branches, and (2) it deletes old refs you no
longer have on the local side from the remote side.
[apw@xxxxxxxxxxxx: rebase to next post arguments update]
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
Signed-off-by: Andy Whitcroft <apw@xxxxxxxxxxxx>
---
builtin-send-pack.c | 40 ++++++++++++++++++++++++++++------------
remote.c | 15 ++++++++++-----
send-pack.h | 1 +
3 files changed, 39 insertions(+), 17 deletions(-)
diff --git a/builtin-send-pack.c b/builtin-send-pack.c
index 5a0f5c6..d5ead97 100644
--- a/builtin-send-pack.c
+++ b/builtin-send-pack.c
@@ -8,7 +8,7 @@
#include "send-pack.h"
static const char send_pack_usage[] =
-"git-send-pack [--all] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
+"git-send-pack [--all | --mirror] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
" --all and explicit <ref> specification are mutually exclusive.";
static struct send_pack_args args = {
@@ -242,7 +242,7 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
if (!remote_tail)
remote_tail = &remote_refs;
if (match_refs(local_refs, remote_refs, &remote_tail,
- nr_refspec, refspec, args.send_all))
+ nr_refspec, refspec, args.send_all | (args.send_mirror << 1)))
return -1;
if (!remote_refs) {
@@ -259,20 +259,28 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
char old_hex[60], *new_hex;
int will_delete_ref;
const char *pretty_ref;
- const char *pretty_peer;
+ const char *pretty_peer = NULL; /* only used when not deleting */
+ const unsigned char *new_sha1;
- if (!ref->peer_ref)
- continue;
+ if (!ref->peer_ref) {
+ if (!args.send_mirror)
+ continue;
+ new_sha1 = null_sha1;
+ }
+ else
+ new_sha1 = ref->peer_ref->new_sha1;
if (!shown_dest) {
fprintf(stderr, "To %s\n", dest);
shown_dest = 1;
}
+ will_delete_ref = is_null_sha1(new_sha1);
+
pretty_ref = prettify_ref(ref->name);
- pretty_peer = prettify_ref(ref->peer_ref->name);
+ if (!will_delete_ref)
+ pretty_peer = prettify_ref(ref->peer_ref->name);
- will_delete_ref = is_null_sha1(ref->peer_ref->new_sha1);
if (will_delete_ref && !allow_deleting_refs) {
fprintf(stderr, " ! %-*s %s (remote does not support deleting refs)\n",
SUMMARY_WIDTH, "[rejected]", pretty_ref);
@@ -280,7 +288,7 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
continue;
}
if (!will_delete_ref &&
- !hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
+ !hashcmp(ref->old_sha1, new_sha1)) {
if (args.verbose)
fprintf(stderr, " = %-*s %s -> %s\n",
SUMMARY_WIDTH, "[up to date]",
@@ -312,8 +320,7 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
!is_null_sha1(ref->old_sha1) &&
!ref->force) {
if (!has_sha1_file(ref->old_sha1) ||
- !ref_newer(ref->peer_ref->new_sha1,
- ref->old_sha1)) {
+ !ref_newer(new_sha1, ref->old_sha1)) {
/* We do not have the remote ref, or
* we know that the remote ref is not
* an ancestor of what we are trying to
@@ -328,7 +335,7 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
continue;
}
}
- hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
+ hashcpy(ref->new_sha1, new_sha1);
if (!will_delete_ref)
new_refs++;
strcpy(old_hex, sha1_to_hex(ref->old_sha1));
@@ -459,6 +466,10 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
args.dry_run = 1;
continue;
}
+ if (!strcmp(arg, "--mirror")) {
+ args.send_mirror = 1;
+ continue;
+ }
if (!strcmp(arg, "--force")) {
args.force_update = 1;
continue;
@@ -483,7 +494,12 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
}
if (!dest)
usage(send_pack_usage);
- if (heads && args.send_all)
+ /*
+ * --all and --mirror are incompatible; neither makes sense
+ * with any refspecs.
+ */
+ if ((heads && (args.send_all || args.send_mirror)) ||
+ (args.send_all && args.send_mirror))
usage(send_pack_usage);
if (remote_name) {
diff --git a/remote.c b/remote.c
index 59defdb..45dd59b 100644
--- a/remote.c
+++ b/remote.c
@@ -722,10 +722,12 @@ static const struct refspec *check_pattern_match(const struct refspec *rs,
* without thinking.
*/
int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
- int nr_refspec, const char **refspec, int all)
+ int nr_refspec, const char **refspec, int flags)
{
struct refspec *rs =
parse_ref_spec(nr_refspec, (const char **) refspec);
+ int send_all = flags & 01;
+ int send_mirror = flags & 02;
if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
return -1;
@@ -742,7 +744,7 @@ int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
if (!pat)
continue;
}
- else if (prefixcmp(src->name, "refs/heads/"))
+ else if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
/*
* "matching refs"; traditionally we pushed everything
* including refs outside refs/heads/ hierarchy, but
@@ -763,10 +765,13 @@ int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
if (dst_peer && dst_peer->peer_ref)
/* We're already sending something to this ref. */
goto free_name;
- if (!dst_peer && !nr_refspec && !all)
- /* Remote doesn't have it, and we have no
+
+ if (!dst_peer && !nr_refspec && !(send_all || send_mirror))
+ /*
+ * Remote doesn't have it, and we have no
* explicit pattern, and we don't have
- * --all. */
+ * --all nor --mirror.
+ */
goto free_name;
if (!dst_peer) {
/* Create a new one and link it */
diff --git a/send-pack.h b/send-pack.h
index 7a24f71..8ff1dc3 100644
--- a/send-pack.h
+++ b/send-pack.h
@@ -5,6 +5,7 @@ struct send_pack_args {
const char *receivepack;
unsigned verbose:1,
send_all:1,
+ send_mirror:1,
force_update:1,
use_thin_pack:1,
dry_run:1;
-
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