mirror of
https://github.com/git/git.git
synced 2024-10-30 13:57:54 +01:00
7ec30aaa5b
Commit 1b77d83cab 'setup_git_directory_gently_1(): resolve symlinks
in ceiling paths' changed the setup code to resolve symlinks in the
entries in GIT_CEILING_DIRECTORIES. Because those entries are
compared textually to the symlink-resolved current directory, an
entry in GIT_CEILING_DIRECTORIES that contained a symlink would have
no effect. It was known that this could cause performance problems
if the symlink resolution *itself* touched slow filesystems, but it
was thought that such use cases would be unlikely. The intention of
the earlier change was to deal with a case when the user has this:
GIT_CEILING_DIRECTORIES=/home/gitster
but in reality, /home/gitster is a symbolic link to somewhere else,
e.g. /net/machine/home4/gitster. A textual comparison between the
specified value /home/gitster and the location getcwd(3) returns
would not help us, but readlink("/home/gitster") would still be
fast.
After this change was released, Anders Kaseorg <andersk@mit.edu>
reported:
> [...] my computer has been acting so slow when I’m not connected to
> the network. I put various network filesystem paths in
> $GIT_CEILING_DIRECTORIES, such as
> /afs/athena.mit.edu/user/a/n/andersk (to avoid hitting its parents
> /afs/athena.mit.edu, /afs/athena.mit.edu/user/a, and
> /afs/athena.mit.edu/user/a/n which all live in different AFS
> volumes). Now when I’m not connected to the network, every
> invocation of Git, including the __git_ps1 in my shell prompt, waits
> for AFS to timeout.
To allow users to work around this problem, give them a mechanism to
turn off symlink resolution in GIT_CEILING_DIRECTORIES entries. All
the entries that follow an empty entry will not be checked for symbolic
links and used literally in comparison. E.g. with these:
GIT_CEILING_DIRECTORIES=:/foo/bar:/xyzzy or
GIT_CEILING_DIRECTORIES=/foo/bar::/xyzzy
we will not readlink("/xyzzy") because it comes after an empty entry.
With the former (but not with the latter), "/foo/bar" comes after an
empty entry, and we will not readlink it, either.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
181 lines
4 KiB
Bash
Executable file
181 lines
4 KiB
Bash
Executable file
#!/bin/sh
|
|
|
|
test_description='test GIT_CEILING_DIRECTORIES'
|
|
. ./test-lib.sh
|
|
|
|
test_prefix() {
|
|
test_expect_success "$1" \
|
|
"test '$2' = \"\$(git rev-parse --show-prefix)\""
|
|
}
|
|
|
|
test_fail() {
|
|
test_expect_success "$1: prefix" '
|
|
test_expect_code 128 git rev-parse --show-prefix
|
|
'
|
|
}
|
|
|
|
TRASH_ROOT="$PWD"
|
|
ROOT_PARENT=$(dirname "$TRASH_ROOT")
|
|
|
|
|
|
unset GIT_CEILING_DIRECTORIES
|
|
test_prefix no_ceil ""
|
|
|
|
export GIT_CEILING_DIRECTORIES
|
|
|
|
GIT_CEILING_DIRECTORIES=""
|
|
test_prefix ceil_empty ""
|
|
|
|
GIT_CEILING_DIRECTORIES="$ROOT_PARENT"
|
|
test_prefix ceil_at_parent ""
|
|
|
|
GIT_CEILING_DIRECTORIES="$ROOT_PARENT/"
|
|
test_prefix ceil_at_parent_slash ""
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT"
|
|
test_prefix ceil_at_trash ""
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/"
|
|
test_prefix ceil_at_trash_slash ""
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub"
|
|
test_prefix ceil_at_sub ""
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub/"
|
|
test_prefix ceil_at_sub_slash ""
|
|
|
|
if test_have_prereq SYMLINKS
|
|
then
|
|
ln -s sub top
|
|
fi
|
|
|
|
mkdir -p sub/dir || exit 1
|
|
cd sub/dir || exit 1
|
|
|
|
unset GIT_CEILING_DIRECTORIES
|
|
test_prefix subdir_no_ceil "sub/dir/"
|
|
|
|
export GIT_CEILING_DIRECTORIES
|
|
|
|
GIT_CEILING_DIRECTORIES=""
|
|
test_prefix subdir_ceil_empty "sub/dir/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT"
|
|
test_fail subdir_ceil_at_trash
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/"
|
|
test_fail subdir_ceil_at_trash_slash
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub"
|
|
test_fail subdir_ceil_at_sub
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub/"
|
|
test_fail subdir_ceil_at_sub_slash
|
|
|
|
if test_have_prereq SYMLINKS
|
|
then
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/top"
|
|
test_fail subdir_ceil_at_top
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/top/"
|
|
test_fail subdir_ceil_at_top_slash
|
|
|
|
GIT_CEILING_DIRECTORIES=":$TRASH_ROOT/top"
|
|
test_prefix subdir_ceil_at_top_no_resolve "sub/dir/"
|
|
GIT_CEILING_DIRECTORIES=":$TRASH_ROOT/top/"
|
|
test_prefix subdir_ceil_at_top_slash_no_resolve "sub/dir/"
|
|
fi
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub/dir"
|
|
test_prefix subdir_ceil_at_subdir "sub/dir/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub/dir/"
|
|
test_prefix subdir_ceil_at_subdir_slash "sub/dir/"
|
|
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/su"
|
|
test_prefix subdir_ceil_at_su "sub/dir/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/su/"
|
|
test_prefix subdir_ceil_at_su_slash "sub/dir/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub/di"
|
|
test_prefix subdir_ceil_at_sub_di "sub/dir/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub/di"
|
|
test_prefix subdir_ceil_at_sub_di_slash "sub/dir/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/subdi"
|
|
test_prefix subdir_ceil_at_subdi "sub/dir/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/subdi"
|
|
test_prefix subdir_ceil_at_subdi_slash "sub/dir/"
|
|
|
|
|
|
GIT_CEILING_DIRECTORIES="/foo:$TRASH_ROOT/sub"
|
|
test_fail second_of_two
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub:/bar"
|
|
test_fail first_of_two
|
|
|
|
GIT_CEILING_DIRECTORIES="/foo:$TRASH_ROOT/sub:/bar"
|
|
test_fail second_of_three
|
|
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sub"
|
|
GIT_DIR=../../.git
|
|
export GIT_DIR
|
|
test_prefix git_dir_specified ""
|
|
unset GIT_DIR
|
|
|
|
|
|
cd ../.. || exit 1
|
|
mkdir -p s/d || exit 1
|
|
cd s/d || exit 1
|
|
|
|
unset GIT_CEILING_DIRECTORIES
|
|
test_prefix sd_no_ceil "s/d/"
|
|
|
|
export GIT_CEILING_DIRECTORIES
|
|
|
|
GIT_CEILING_DIRECTORIES=""
|
|
test_prefix sd_ceil_empty "s/d/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT"
|
|
test_fail sd_ceil_at_trash
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/"
|
|
test_fail sd_ceil_at_trash_slash
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/s"
|
|
test_fail sd_ceil_at_s
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/s/"
|
|
test_fail sd_ceil_at_s_slash
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/s/d"
|
|
test_prefix sd_ceil_at_sd "s/d/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/s/d/"
|
|
test_prefix sd_ceil_at_sd_slash "s/d/"
|
|
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/su"
|
|
test_prefix sd_ceil_at_su "s/d/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/su/"
|
|
test_prefix sd_ceil_at_su_slash "s/d/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/s/di"
|
|
test_prefix sd_ceil_at_s_di "s/d/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/s/di"
|
|
test_prefix sd_ceil_at_s_di_slash "s/d/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sdi"
|
|
test_prefix sd_ceil_at_sdi "s/d/"
|
|
|
|
GIT_CEILING_DIRECTORIES="$TRASH_ROOT/sdi"
|
|
test_prefix sd_ceil_at_sdi_slash "s/d/"
|
|
|
|
|
|
test_done
|