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-rw-r--r--setup.c35
1 files changed, 34 insertions, 1 deletions
diff --git a/setup.c b/setup.c
index 5716d90b57..7e0460205d 100644
--- a/setup.c
+++ b/setup.c
@@ -323,6 +323,8 @@ const char *setup_git_directory_gently(int *nongit_ok)
const char *gitdirenv;
const char *gitfile_dir;
int len, offset, ceil_offset, root_len;
+ int current_device = 0, one_filesystem = 1;
+ struct stat buf;
/*
* Let's assume that we are in a git repository.
@@ -390,6 +392,12 @@ const char *setup_git_directory_gently(int *nongit_ok)
* etc.
*/
offset = len = strlen(cwd);
+ one_filesystem = !git_env_bool("GIT_DISCOVERY_ACROSS_FILESYSTEM", 0);
+ if (one_filesystem) {
+ if (stat(".", &buf))
+ die_errno("failed to stat '.'");
+ current_device = buf.st_dev;
+ }
for (;;) {
gitfile_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
if (gitfile_dir) {
@@ -422,8 +430,27 @@ const char *setup_git_directory_gently(int *nongit_ok)
}
die("Not a git repository (or any of the parent directories): %s", DEFAULT_GIT_DIR_ENVIRONMENT);
}
- if (chdir(".."))
+ if (one_filesystem) {
+ if (stat("..", &buf)) {
+ cwd[offset] = '\0';
+ die_errno("failed to stat '%s/..'", cwd);
+ }
+ if (buf.st_dev != current_device) {
+ if (nongit_ok) {
+ if (chdir(cwd))
+ die_errno("Cannot come back to cwd");
+ *nongit_ok = 1;
+ return NULL;
+ }
+ cwd[offset] = '\0';
+ die("Not a git repository (or any parent up to mount parent %s)\n"
+ "Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).", cwd);
+ }
+ }
+ if (chdir("..")) {
+ cwd[offset] = '\0';
die_errno("Cannot change to '%s/..'", cwd);
+ }
}
inside_git_dir = 0;
@@ -519,6 +546,12 @@ int check_repository_format(void)
return check_repository_format_gently(NULL);
}
+/*
+ * Returns the "prefix", a path to the current working directory
+ * relative to the work tree root, or NULL, if the current working
+ * directory is not a strict subdirectory of the work tree root. The
+ * prefix always ends with a '/' character.
+ */
const char *setup_git_directory(void)
{
const char *retval = setup_git_directory_gently(NULL);