diff options
authorTaylor Blau <>2018-10-08 18:09:30 (GMT)
committerJunio C Hamano <>2018-10-09 05:30:03 (GMT)
commit40f327faf543ccaeb03aa0362f3fed7438c2c615 (patch)
parent89284c1d6ca03480a93f9d95a2460a09390f3c40 (diff)
transport.c: introduce core.alternateRefsPrefixes
The recently-introduced "core.alternateRefsCommand" allows callers to specify with high flexibility the tips that they wish to advertise from alternates. This flexibility comes at the cost of some inconvenience when the caller only wishes to limit the advertisement to one or more prefixes. For example, to advertise only tags, a caller using 'core.alternateRefsCommand' would have to do: $ git config core.alternateRefsCommand ' \ f() { git -C "$1" for-each-ref \ refs/tags --format="%(objectname)" }; f "$@"' The above is cumbersome to write, so let's introduce a "core.alternateRefsPrefixes" to address this common case. Instead, the caller can run: $ git config core.alternateRefsPrefixes 'refs/tags' Which will behave identically to the longer example using "core.alternateRefsCommand". Since the value of "core.alternateRefsPrefixes" is appended to 'git for-each-ref' and then executed, include a "--" before taking the configured value to avoid misinterpreting arguments as flags to 'git for-each-ref'. In the case that the caller wishes to specify multiple prefixes, they may separate them by whitespace. If "core.alternateRefsCommand" is set, it will take precedence over "core.alternateRefsPrefixes". Signed-off-by: Taylor Blau <> Acked-by: Jeff King <> Signed-off-by: Junio C Hamano <>
3 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 00224de..3486f9f 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -627,6 +627,13 @@ Note that you cannot generally put `git for-each-ref` directly into the config
value, as it does not take a repository path as an argument (but you can wrap
the command above in a shell script).
+ When listing references from an alternate, list only references that begin
+ with the given prefix. Prefixes match as if they were given as arguments to
+ linkgit:git-for-each-ref[1]. To list multiple prefixes, separate them with
+ whitespace. If `core.alternateRefsCommand` is set, setting
+ `core.alternateRefsPrefixes` has no effect.
If true this repository is assumed to be 'bare' and has no
working directory associated with it. If this is the case a
diff --git a/t/ b/t/
index 49d0fe4..457c20c 100755
--- a/t/
+++ b/t/
@@ -30,4 +30,12 @@ test_expect_success 'with core.alternateRefsCommand' '
test_cmp expect actual.haves
+test_expect_success 'with core.alternateRefsPrefixes' '
+ test_config -C fork core.alternateRefsPrefixes "refs/heads/private" &&
+ git rev-parse private/branch >expect &&
+ printf "0000" | git receive-pack fork >actual &&
+ extract_haves <actual >actual.haves &&
+ test_cmp expect actual.haves
diff --git a/transport.c b/transport.c
index 19baec7..90a3350 100644
--- a/transport.c
+++ b/transport.c
@@ -1341,6 +1341,11 @@ static void fill_alternate_refs_command(struct child_process *cmd,
argv_array_pushf(&cmd->args, "--git-dir=%s", repo_path);
argv_array_push(&cmd->args, "for-each-ref");
argv_array_push(&cmd->args, "--format=%(objectname)");
+ if (!git_config_get_value("core.alternateRefsPrefixes", &value)) {
+ argv_array_push(&cmd->args, "--");
+ argv_array_split(&cmd->args, value);
+ }
cmd->env = local_repo_env;