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-rw-r--r--Documentation/config.txt11
-rwxr-xr-xt/t5410-receive-pack-alternates.sh33
-rw-r--r--transport.c19
3 files changed, 59 insertions, 4 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt
index eb66a11..00224de 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -616,6 +616,17 @@ core.preferSymlinkRefs::
This is sometimes needed to work with old scripts that
expect HEAD to be a symbolic link.
+core.alternateRefsCommand::
+ When advertising tips of available history from an alternate, use the shell to
+ execute the specified command instead of linkgit:git-for-each-ref[1]. The
+ first argument is the absolute path of the alternate. Output must contain one
+ hex object id per line (i.e., the same as produce by `git for-each-ref
+ --format='%(objectname)'`).
++
+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).
+
core.bare::
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/t5410-receive-pack-alternates.sh b/t/t5410-receive-pack-alternates.sh
new file mode 100755
index 0000000..49d0fe4
--- /dev/null
+++ b/t/t5410-receive-pack-alternates.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+test_description='git receive-pack with alternate ref filtering'
+
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+ test_commit base &&
+ git clone -s --bare . fork &&
+ git checkout -b public/branch master &&
+ test_commit public &&
+ git checkout -b private/branch master &&
+ test_commit private
+'
+
+extract_haves () {
+ depacketize | perl -lne '/^(\S+) \.have/ and print $1'
+}
+
+test_expect_success 'with core.alternateRefsCommand' '
+ write_script fork/alternate-refs <<-\EOF &&
+ git --git-dir="$1" for-each-ref \
+ --format="%(objectname)" \
+ refs/heads/public/
+ EOF
+ test_config -C fork core.alternateRefsCommand alternate-refs &&
+ git rev-parse public/branch >expect &&
+ printf "0000" | git receive-pack fork >actual &&
+ extract_haves <actual >actual.haves &&
+ test_cmp expect actual.haves
+'
+
+test_done
diff --git a/transport.c b/transport.c
index 25d8ea7..19baec7 100644
--- a/transport.c
+++ b/transport.c
@@ -1328,10 +1328,21 @@ literal_copy:
static void fill_alternate_refs_command(struct child_process *cmd,
const char *repo_path)
{
- cmd->git_cmd = 1;
- 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)");
+ const char *value;
+
+ if (!git_config_get_value("core.alternateRefsCommand", &value)) {
+ cmd->use_shell = 1;
+
+ argv_array_push(&cmd->args, value);
+ argv_array_push(&cmd->args, repo_path);
+ } else {
+ cmd->git_cmd = 1;
+
+ 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)");
+ }
+
cmd->env = local_repo_env;
cmd->out = -1;
}