Some commands may want to act differently when called transitively by
other git commands in contrast to when called by the user directly. The
variable recursion_depth provides all built-ins with a way to tell these
cases apart.
Scripts can use the underlying environment variable GIT_RECURSION_DEPTH
to the same purpose.
Wrappers around git can intentionally set GIT_RECURSION_DEPTH to ensure
a command acts as if it was called internally.
Signed-off-by: XZS <d.f.fischer@xxxxxx>
---
cache.h | 1 +
git.c | 17 +++++++++++++++++
t/t0001-init.sh | 1 +
t/t0120-recursion-depth.sh | 17 +++++++++++++++++
4 files changed, 36 insertions(+)
create mode 100755 t/t0120-recursion-depth.sh
diff --git a/cache.h b/cache.h
index 9f09540..105607c 100644
--- a/cache.h
+++ b/cache.h
@@ -1777,6 +1777,7 @@ struct startup_info {
const char *prefix;
};
extern struct startup_info *startup_info;
+extern int recursion_depth;
/* merge.c */
struct commit_list;
diff --git a/git.c b/git.c
index 968a8a4..0bcc7b4 100644
--- a/git.c
+++ b/git.c
@@ -25,6 +25,7 @@ static const char *env_names[] = {
};
static char *orig_env[4];
static int save_restore_env_balance;
+int recursion_depth;
static void save_env_before_alias(void)
{
@@ -630,12 +631,28 @@ static void restore_sigpipe_to_default(void)
signal(SIGPIPE, SIG_DFL);
}
+static int get_recursion_depth(void)
+{
+ const char *envrec = getenv("GIT_RECURSION_DEPTH");
+ return envrec ? strtol(envrec, NULL, 10) : 0;
+}
+
+static int set_recursion_depth(int depth)
+{
+ char number[10]; // TODO compute length
+ snprintf(number, sizeof(number), "%i", depth);
+ return setenv("GIT_RECURSION_DEPTH", number, 1);
+}
+
int main(int argc, char **av)
{
const char **argv = (const char **) av;
const char *cmd;
int done_help = 0;
+ recursion_depth = get_recursion_depth();
+ set_recursion_depth(recursion_depth + 1);
+
cmd = git_extract_argv0_path(argv[0]);
if (!cmd)
cmd = "git-help";
diff --git a/t/t0001-init.sh b/t/t0001-init.sh
index a5b9e7a..69e7532 100755
--- a/t/t0001-init.sh
+++ b/t/t0001-init.sh
@@ -93,6 +93,7 @@ test_expect_success 'No extra GIT_* on alias scripts' '
sed -n \
-e "/^GIT_PREFIX=/d" \
-e "/^GIT_TEXTDOMAINDIR=/d" \
+ -e "/^GIT_RECURSION_DEPTH=/d" \
-e "/^GIT_/s/=.*//p" |
sort
EOF
diff --git a/t/t0120-recursion-depth.sh b/t/t0120-recursion-depth.sh
new file mode 100755
index 0000000..5aeb71a
--- /dev/null
+++ b/t/t0120-recursion-depth.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+test_description='recursion counter'
+
+. ./test-lib.sh
+
+test_expect_success 'recursion counter is 1 on direct run' '
+ git config alias.one "!echo \$GIT_RECURSION_DEPTH" &&
+ test "$(git one)" -eq 1
+'
+
+test_expect_success 'recursion counter is greater 1 on transitive run' '
+ git config alias.two "!git one" &&
+ test "$(git two)" -gt 1
+'
+
+test_done
--
2.8.0
--
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