зеркало из https://github.com/microsoft/git.git
GIT_ONE_FILESYSTEM: flip the default to stop at filesystem boundaries
Regarding the new environment variable, Linus Torvalds <torvalds@linux-foundation.org> writes on Tue, 30 Mar 2010 in <alpine.LFD.2.00.1003301537150.3707@i5.linux-foundation.org>: I suspect that it is _very_ unusual to have a source repo that crosses multiple filesystems, and the original reason for this patch-series seems to me to be likely to be more common than that multi-fs case. So having the logic go the other way would seem to match the common case, no? The "crossing filesystem boundary" condition is checked by comparing st_dev field in the result from stat(2). This is slightly worrysome if non-POSIX ports return different values in the field even for directories in the same work tree extracted to the same "filesystem". Erik Faye-Lund confirms that in the msysgit port st_dev is 0, so this should be safe, as "even Windows is safe" ;-) This will affect those who use /.git to cram /etc and /home/me in the same repostiory, /home is mounted from non-root filesystem, and a git operation is done from inside /home/me/src. But that is such a corner case we don't want to give preference over helping people who will benefit from having this default so that they do not have to suffer from slow automounters. Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -531,10 +531,14 @@ git so take care if using Cogito etc.
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(Useful for excluding slow-loading network directories.)
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'GIT_ONE_FILESYSTEM'::
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If set to a true value ("true" or a non-zero integer), stop at
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filesystem boundaries when looking for a repository directory.
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Like 'GIT_CEILING_DIRECTORIES', it will not affect an explicit
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respository directory set via 'GIT_DIR' or on the command line.
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When run in a directory that does not have ".git" repository
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directory, git tries to find such a directory in the parent
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directories to find the top of the working tree, but by default it
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does not cross filesystem boundaries. This environment variable
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can be set to false value ("false" or zero) to tell git not to
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stop at filesystem boundaries. Like 'GIT_CEILING_DIRECTORIES',
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this will not affect an explicit respository directory set via
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'GIT_DIR' or on the command line.
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git Commits
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~~~~~~~~~~~
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4
setup.c
4
setup.c
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@ -323,7 +323,7 @@ const char *setup_git_directory_gently(int *nongit_ok)
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const char *gitdirenv;
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const char *gitfile_dir;
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int len, offset, ceil_offset, root_len;
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int current_device = 0, one_filesystem = 0;
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int current_device = 0, one_filesystem = 1;
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struct stat buf;
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/*
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@ -444,7 +444,7 @@ const char *setup_git_directory_gently(int *nongit_ok)
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}
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cwd[offset] = '\0';
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die("Not a git repository (or any parent up to mount parent %s)\n"
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"Stopping at filesystem boundary since GIT_ONE_FILESYSTEM is set.", cwd);
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"Stopping at filesystem boundary since GIT_ONE_FILESYSTEM is true.", cwd);
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}
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}
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if (chdir("..")) {
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