setup: opt-out of check with safe.directory=*
With the addition of the safe.directory in 8959555ce
(setup_git_directory(): add an owner check for the top-level directory,
2022-03-02) released in v2.35.2, we are receiving feedback from a
variety of users about the feature.
Some users have a very large list of shared repositories and find it
cumbersome to add this config for every one of them.
In a more difficult case, certain workflows involve running Git commands
within containers. The container boundary prevents any global or system
config from communicating `safe.directory` values from the host into the
container. Further, the container almost always runs as a different user
than the owner of the directory in the host.
To simplify the reactions necessary for these users, extend the
definition of the safe.directory config value to include a possible '*'
value. This value implies that all directories are safe, providing a
single setting to opt-out of this protection.
Note that an empty assignment of safe.directory clears all previous
values, and this is already the case with the "if (!value || !*value)"
condition.
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/config/safe.txt b/Documentation/config/safe.txt
index 63597b2..6d764fe 100644
--- a/Documentation/config/safe.txt
+++ b/Documentation/config/safe.txt
@@ -19,3 +19,10 @@
The value of this setting is interpolated, i.e. `~/<path>` expands to a
path relative to the home directory and `%(prefix)/<path>` expands to a
path relative to Git's (runtime) prefix.
++
+To completely opt-out of this security check, set `safe.directory` to the
+string `*`. This will allow all repositories to be treated as if their
+directory was listed in the `safe.directory` list. If `safe.directory=*`
+is set in system config and you want to re-enable this protection, then
+initialize your list with an empty value before listing the repositories
+that you deem safe.
diff --git a/setup.c b/setup.c
index 4b9f073..aad9ace 100644
--- a/setup.c
+++ b/setup.c
@@ -1037,9 +1037,11 @@
if (strcmp(key, "safe.directory"))
return 0;
- if (!value || !*value)
+ if (!value || !*value) {
data->is_safe = 0;
- else {
+ } else if (!strcmp(value, "*")) {
+ data->is_safe = 1;
+ } else {
const char *interpolated = NULL;
if (!git_config_pathname(&interpolated, key, value) &&
diff --git a/t/t0033-safe-directory.sh b/t/t0033-safe-directory.sh
index 6f33c0d..239d93f 100755
--- a/t/t0033-safe-directory.sh
+++ b/t/t0033-safe-directory.sh
@@ -36,4 +36,14 @@
expect_rejected_dir
'
+test_expect_success 'safe.directory=*' '
+ git config --global --add safe.directory "*" &&
+ git status
+'
+
+test_expect_success 'safe.directory=*, but is reset' '
+ git config --global --add safe.directory "" &&
+ expect_rejected_dir
+'
+
test_done
