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Add support for GIT_ONE_FILESYSTEM

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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>
This commit is contained in:
Lars R. Damerow 2010-03-17 12:55:53 -07:00 committed by Junio C Hamano
parent 502ffe3491
commit 8030e44215
2 changed files with 31 additions and 0 deletions
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6
Documentation/git.txt
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@ -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'::

25
setup.c
View File

@ -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);