git/t/t5522-pull-symlink.sh

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#!/bin/sh
test_description='pulling from symlinked subdir'
. ./test-lib.sh
if ! test_have_prereq SYMLINKS
then
say 'Symbolic links not supported, skipping tests.'
test_done
fi
# The scenario we are building:
#
# trash\ directory/
# clone-repo/
# subdir/
# bar
# subdir-link -> clone-repo/subdir/
#
# The working directory is subdir-link.
test_expect_success setup '
mkdir subdir &&
echo file >subdir/file &&
git add subdir/file &&
git commit -q -m file &&
git clone -q . clone-repo &&
ln -s clone-repo/subdir/ subdir-link &&
(
cd clone-repo &&
git config receive.denyCurrentBranch warn
) &&
git config receive.denyCurrentBranch warn
'
# Demonstrate that things work if we just avoid the symlink
#
test_expect_success 'pulling from real subdir' '
(
echo real >subdir/file &&
git commit -m real subdir/file &&
cd clone-repo/subdir/ &&
git pull &&
test real = $(cat file)
)
'
# From subdir-link, pulling should work as it does from
# clone-repo/subdir/.
#
# Instead, the error pull gave was:
#
# fatal: 'origin': unable to chdir or not a git archive
# fatal: The remote end hung up unexpectedly
#
# because git would find the .git/config for the "trash directory"
# repo, not for the clone-repo repo. The "trash directory" repo
# had no entry for origin. Git found the wrong .git because
# git rev-parse --show-cdup printed a path relative to
# clone-repo/subdir/, not subdir-link/. Git rev-parse --show-cdup
# used the correct .git, but when the git pull shell script did
# "cd `git rev-parse --show-cdup`", it ended up in the wrong
# directory. A POSIX shell's "cd" works a little differently
# than chdir() in C; "cd -P" is much closer to chdir().
#
test_expect_success 'pulling from symlinked subdir' '
(
echo link >subdir/file &&
git commit -m link subdir/file &&
cd subdir-link/ &&
git pull &&
test link = $(cat file)
)
'
# Prove that the remote end really is a repo, and other commands
# work fine in this context. It's just that "git pull" breaks.
#
test_expect_success 'pushing from symlinked subdir' '
(
cd subdir-link/ &&
echo push >file &&
git commit -m push ./file &&
git push
) &&
test push = $(git show HEAD:subdir/file)
'
test_done