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-rw-r--r--Documentation/config.txt9
-rw-r--r--path.c8
-rwxr-xr-xt/t0060-path-utils.sh8
3 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt
index bf82766a6a..0c0e6b859f 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -298,6 +298,15 @@ pathname::
tilde expansion happens to such a string: `~/`
is expanded to the value of `$HOME`, and `~user/` to the
specified user's home directory.
++
+If a path starts with `%(prefix)/`, the remainder is interpreted as a
+path relative to Git's "runtime prefix", i.e. relative to the location
+where Git itself was installed. For example, `%(prefix)/bin/` refers to
+the directory in which the Git executable itself lives. If Git was
+compiled without runtime prefix support, the compiled-in prefix will be
+subsituted instead. In the unlikely event that a literal path needs to
+be specified that should _not_ be expanded, it needs to be prefixed by
+`./`, like so: `./%(prefix)/bin`.
Variables
diff --git a/path.c b/path.c
index 8dc5ad2cb5..0bc788ea40 100644
--- a/path.c
+++ b/path.c
@@ -12,6 +12,7 @@
#include "packfile.h"
#include "object-store.h"
#include "lockfile.h"
+#include "exec-cmd.h"
static int get_st_mode_bits(const char *path, int *mode)
{
@@ -723,6 +724,9 @@ static struct passwd *getpw_str(const char *username, size_t len)
* failure or if path is NULL.
*
* If real_home is true, strbuf_realpath($HOME) is used in the `~/` expansion.
+ *
+ * If the path starts with `%(prefix)/`, the remainder is interpreted as
+ * relative to where Git is installed, and expanded to the absolute path.
*/
char *interpolate_path(const char *path, int real_home)
{
@@ -731,6 +735,10 @@ char *interpolate_path(const char *path, int real_home)
if (path == NULL)
goto return_null;
+
+ if (skip_prefix(path, "%(prefix)/", &path))
+ return system_path(path);
+
if (path[0] == '~') {
const char *first_slash = strchrnul(path, '/');
const char *username = path + 1;
diff --git a/t/t0060-path-utils.sh b/t/t0060-path-utils.sh
index a76728c27b..34d1061f32 100755
--- a/t/t0060-path-utils.sh
+++ b/t/t0060-path-utils.sh
@@ -540,6 +540,14 @@ test_expect_success RUNTIME_PREFIX,CAN_EXEC_IN_PWD 'RUNTIME_PREFIX works' '
cp "$GIT_EXEC_PATH"/git$X pretend/bin/ &&
GIT_EXEC_PATH= ./pretend/bin/git here >actual &&
echo HERE >expect &&
+ test_cmp expect actual'
+
+test_expect_success RUNTIME_PREFIX,CAN_EXEC_IN_PWD '%(prefix)/ works' '
+ mkdir -p pretend/bin &&
+ cp "$GIT_EXEC_PATH"/git$X pretend/bin/ &&
+ git config yes.path "%(prefix)/yes" &&
+ GIT_EXEC_PATH= ./pretend/bin/git config --path yes.path >actual &&
+ echo "$(pwd)/pretend/yes" >expect &&
test_cmp expect actual
'