git/t/t2001-checkout-cache-clash.sh
Johannes Sixt 704a3143d5 Use prerequisite tags to skip tests that depend on symbolic links
Many tests depend on that symbolic links work.  This introduces a check
that sets the prerequisite tag SYMLINKS if the file system supports
symbolic links.  Since so many tests have to check for this prerequisite,
we do the check in test-lib.sh, so that we don't need to repeat the test
in many scripts.

To check for 'ln -s' failures, you can use a FAT partition on Linux:

$ mkdosfs -C git-on-fat 1000000
$ sudo mount -o loop,uid=j6t,gid=users,shortname=winnt git-on-fat /mnt

Clone git to /mnt and

$ GIT_SKIP_TESTS='t0001.1[34] t0010 t1301 t403[34] t4129.[47] t5701.7
          t7701.3 t9100 t9101.26 t9119 t9124.[67] t9200.10 t9600.6' \
        make test

(These additionally skipped tests depend on POSIX permissions that FAT on
Linux does not provide.)

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
2009-03-22 17:26:44 +01:00

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#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#
test_description='git checkout-index test.
This test registers the following filesystem structure in the cache:
path0/file0 - a file in a directory
path1/file1 - a file in a directory
and attempts to check it out when the work tree has:
path0/file0 - a file in a directory
path1 - a symlink pointing at "path0"
Checkout cache should fail to extract path1/file1 because the leading
path path1 is occupied by a non-directory. With "-f" it should remove
the symlink path1 and create directory path1 and file path1/file1.
'
. ./test-lib.sh
show_files() {
# show filesystem files, just [-dl] for type and name
find path? -ls |
sed -e 's/^[0-9]* * [0-9]* * \([-bcdl]\)[^ ]* *[0-9]* *[^ ]* *[^ ]* *[0-9]* [A-Z][a-z][a-z] [0-9][0-9] [^ ]* /fs: \1 /'
# what's in the cache, just mode and name
git ls-files --stage |
sed -e 's/^\([0-9]*\) [0-9a-f]* [0-3] /ca: \1 /'
# what's in the tree, just mode and name.
git ls-tree -r "$1" |
sed -e 's/^\([0-9]*\) [^ ]* [0-9a-f]* /tr: \1 /'
}
mkdir path0
date >path0/file0
test_expect_success \
'git update-index --add path0/file0' \
'git update-index --add path0/file0'
test_expect_success \
'writing tree out with git write-tree' \
'tree1=$(git write-tree)'
test_debug 'show_files $tree1'
mkdir path1
date >path1/file1
test_expect_success \
'git update-index --add path1/file1' \
'git update-index --add path1/file1'
test_expect_success \
'writing tree out with git write-tree' \
'tree2=$(git write-tree)'
test_debug 'show_files $tree2'
rm -fr path1
test_expect_success \
'read previously written tree and checkout.' \
'git read-tree -m $tree1 && git checkout-index -f -a'
test_debug 'show_files $tree1'
test_expect_success SYMLINKS \
'git update-index --add a symlink.' \
'ln -s path0 path1 &&
git update-index --add path1'
test_expect_success \
'writing tree out with git write-tree' \
'tree3=$(git write-tree)'
test_debug 'show_files $tree3'
# Morten says "Got that?" here.
# Test begins.
test_expect_success \
'read previously written tree and checkout.' \
'git read-tree $tree2 && git checkout-index -f -a'
test_debug 'show_files $tree2'
test_expect_success \
'checking out conflicting path with -f' \
'test ! -h path0 && test -d path0 &&
test ! -h path1 && test -d path1 &&
test ! -h path0/file0 && test -f path0/file0 &&
test ! -h path1/file1 && test -f path1/file1'
test_done