From: Sean Allred <allred.sean@xxxxxxxxx>
Before, git-var could print usage() even if the command was invoked
correctly with a variable defined in git_vars -- provided that its
read() function returned NULL.
Now, we only print usage() only if it was called with a logical
variable that wasn't defined -- regardless of read().
Since we now know the variable is valid when we call read_var(), we
can avoid printing usage() here (and exiting with code 129) and
instead exit quietly with code 1. While exiting with a different code
can be a breaking change, it's far better than changing the exit
status more generally from 'failure' to 'success'.
Signed-off-by: Sean Allred <allred.sean@xxxxxxxxx>
---
Documentation/git-var.txt | 3 ++-
builtin/var.c | 19 ++++++++++++++++++-
2 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/Documentation/git-var.txt b/Documentation/git-var.txt
index 6aa521fab23..0ab5bfa7d72 100644
--- a/Documentation/git-var.txt
+++ b/Documentation/git-var.txt
@@ -13,7 +13,8 @@ SYNOPSIS
DESCRIPTION
-----------
-Prints a Git logical variable.
+Prints a Git logical variable. Exits with code 1 if the variable has
+no value.
OPTIONS
-------
diff --git a/builtin/var.c b/builtin/var.c
index 491db274292..776f1778ae1 100644
--- a/builtin/var.c
+++ b/builtin/var.c
@@ -56,6 +56,17 @@ static void list_vars(void)
printf("%s=%s\n", ptr->name, val);
}
+static const struct git_var *get_git_var(const char *var)
+{
+ struct git_var *ptr;
+ for (ptr = git_vars; ptr->read; ptr++) {
+ if (strcmp(var, ptr->name) == 0) {
+ return ptr;
+ }
+ }
+ return NULL;
+}
+
static const char *read_var(const char *var)
{
struct git_var *ptr;
@@ -81,6 +92,7 @@ static int show_config(const char *var, const char *value, void *cb)
int cmd_var(int argc, const char **argv, const char *prefix)
{
+ const struct git_var *git_var = NULL;
const char *val = NULL;
if (argc != 2)
usage(var_usage);
@@ -91,9 +103,14 @@ int cmd_var(int argc, const char **argv, const char *prefix)
return 0;
}
git_config(git_default_config, NULL);
+
+ git_var = get_git_var(argv[1]);
+ if (!git_var)
+ usage(var_usage);
+
val = read_var(argv[1]);
if (!val)
- usage(var_usage);
+ return 1;
printf("%s\n", val);
--
gitgitgadget
