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authorLibravatar Lars R. Damerow <lars@pixar.com>2010-03-17 12:55:53 -0700
committerLibravatar Junio C Hamano <gitster@pobox.com>2010-03-28 09:43:20 -0700
commit8030e44215fe8f34edd57d711a35f2f0f97a0423 (patch)
treea50714bf8e3bb9879707c97c86d9f43bb3d636f7
parenttruncate cwd string before printing error message (diff)
downloadtgif-8030e44215fe8f34edd57d711a35f2f0f97a0423.tar.xz
Add support for GIT_ONE_FILESYSTEM
This patch makes git pay attention to the GIT_ONE_FILESYSTEM environment variable. When that variable is set, git will stop searching for a GIT_DIR when it attempts to cross a filesystem boundary. When working in an environment with too many automount points to make maintaining a GIT_CEILING_DIRECTORIES list enjoyable, GIT_ONE_FILESYSTEM gives the option of turning all such attempts off with one setting. Signed-off-by: Lars R. Damerow <lars@pixar.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--Documentation/git.txt6
-rw-r--r--setup.c25
2 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/git.txt b/Documentation/git.txt
index 4e00b315ff..bf1b45eef1 100644
--- a/Documentation/git.txt
+++ b/Documentation/git.txt
@@ -530,6 +530,12 @@ 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_ONE_FILESYSTEM'::
+ If set to a true value ("true" or a non-zero integer), stop at
+ filesystem boundaries when looking for a repository directory.
+ Like 'GIT_CEILING_DIRECTORIES', it will not affect an explicit
+ respository directory set via 'GIT_DIR' or on the command line.
+
git Commits
~~~~~~~~~~~
'GIT_AUTHOR_NAME'::
diff --git a/setup.c b/setup.c
index f0b56b9f54..8b911b1a38 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 = 0;
+ 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_ONE_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) {
@@ -422,6 +430,23 @@ 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 (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 since GIT_ONE_FILESYSTEM is set.", cwd);
+ }
+ }
if (chdir("..")) {
cwd[offset] = '\0';
die_errno("Cannot change to '%s/..'", cwd);