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-rw-r--r--Documentation/git.txt10
-rw-r--r--cache.h1
-rw-r--r--config.c2
-rw-r--r--setup.c29
4 files changed, 40 insertions, 2 deletions
diff --git a/Documentation/git.txt b/Documentation/git.txt
index 1a6ba87823..bec6348dab 100644
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -545,6 +545,16 @@ git so take care if using Cogito etc.
a GIT_DIR set on the command line or in the environment.
(Useful for excluding slow-loading network directories.)
+'GIT_DISCOVERY_ACROSS_FILESYSTEM'::
+ When run in a directory that does not have ".git" repository
+ directory, git tries to find such a directory in the parent
+ directories to find the top of the working tree, but by default it
+ does not cross filesystem boundaries. This environment variable
+ can be set to true to tell git not to stop at filesystem
+ boundaries. Like 'GIT_CEILING_DIRECTORIES', this will not affect
+ an explicit repository directory set via 'GIT_DIR' or on the
+ command line.
+
git Commits
~~~~~~~~~~~
'GIT_AUTHOR_NAME'::
diff --git a/cache.h b/cache.h
index 8270390c88..d00d2be320 100644
--- a/cache.h
+++ b/cache.h
@@ -954,6 +954,7 @@ extern int git_config_set_multivar(const char *, const char *, const char *, int
extern int git_config_rename_section(const char *, const char *);
extern const char *git_etc_gitconfig(void);
extern int check_repository_format_version(const char *var, const char *value, void *cb);
+extern int git_env_bool(const char *, int);
extern int git_config_system(void);
extern int git_config_global(void);
extern int config_error_nonbool(const char *);
diff --git a/config.c b/config.c
index aab53298a1..9b6b1df212 100644
--- a/config.c
+++ b/config.c
@@ -739,7 +739,7 @@ const char *git_etc_gitconfig(void)
return system_wide;
}
-static int git_env_bool(const char *k, int def)
+int git_env_bool(const char *k, int def)
{
const char *v = getenv(k);
return v ? git_config_bool(k, v) : def;
diff --git a/setup.c b/setup.c
index 5716d90b57..5a083fa77d 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;