summaryrefslogtreecommitdiffstats
path: root/t/t7800-difftool.sh
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
commitc8bae7493d2f2910b57f13ded012e86bdcfb0532 (patch)
tree24e09d9f84dec336720cf393e156089ca2835791 /t/t7800-difftool.sh
parentInitial commit. (diff)
downloadgit-c8bae7493d2f2910b57f13ded012e86bdcfb0532.tar.xz
git-c8bae7493d2f2910b57f13ded012e86bdcfb0532.zip
Adding upstream version 1:2.39.2.upstream/1%2.39.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 't/t7800-difftool.sh')
-rwxr-xr-xt/t7800-difftool.sh868
1 files changed, 868 insertions, 0 deletions
diff --git a/t/t7800-difftool.sh b/t/t7800-difftool.sh
new file mode 100755
index 0000000..24297e2
--- /dev/null
+++ b/t/t7800-difftool.sh
@@ -0,0 +1,868 @@
+#!/bin/sh
+#
+# Copyright (c) 2009, 2010, 2012, 2013 David Aguilar
+#
+
+test_description='git-difftool
+
+Testing basic diff tool invocation
+'
+
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
+. ./test-lib.sh
+
+difftool_test_setup ()
+{
+ test_config diff.tool test-tool &&
+ test_config difftool.test-tool.cmd 'cat "$LOCAL"' &&
+ test_config difftool.bogus-tool.cmd false
+}
+
+prompt_given ()
+{
+ prompt="$1"
+ test "$prompt" = "Launch 'test-tool' [Y/n]? branch"
+}
+
+test_expect_success 'basic usage requires no repo' '
+ test_expect_code 129 git difftool -h >output &&
+ test_i18ngrep ^usage: output &&
+ # create a ceiling directory to prevent Git from finding a repo
+ mkdir -p not/repo &&
+ test_when_finished rm -r not &&
+ test_expect_code 129 \
+ env GIT_CEILING_DIRECTORIES="$(pwd)/not" \
+ git -C not/repo difftool -h >output &&
+ test_i18ngrep ^usage: output
+'
+
+# Create a file on main and change it on branch
+test_expect_success 'setup' '
+ echo main >file &&
+ git add file &&
+ git commit -m "added file" &&
+
+ git checkout -b branch main &&
+ echo branch >file &&
+ git commit -a -m "branch changed file" &&
+ git checkout main
+'
+
+# Configure a custom difftool.<tool>.cmd and use it
+test_expect_success 'custom commands' '
+ difftool_test_setup &&
+ test_config difftool.test-tool.cmd "cat \"\$REMOTE\"" &&
+ echo main >expect &&
+ git difftool --no-prompt branch >actual &&
+ test_cmp expect actual &&
+
+ test_config difftool.test-tool.cmd "cat \"\$LOCAL\"" &&
+ echo branch >expect &&
+ git difftool --no-prompt branch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'custom tool commands override built-ins' '
+ test_config difftool.vimdiff.cmd "cat \"\$REMOTE\"" &&
+ echo main >expect &&
+ git difftool --tool vimdiff --no-prompt branch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'difftool ignores bad --tool values' '
+ : >expect &&
+ test_must_fail \
+ git difftool --no-prompt --tool=bad-tool branch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'difftool forwards arguments to diff' '
+ difftool_test_setup &&
+ >for-diff &&
+ git add for-diff &&
+ echo changes>for-diff &&
+ git add for-diff &&
+ : >expect &&
+ git difftool --cached --no-prompt -- for-diff >actual &&
+ test_cmp expect actual &&
+ git reset -- for-diff &&
+ rm for-diff
+'
+
+test_expect_success 'difftool ignores exit code' '
+ test_config difftool.error.cmd false &&
+ git difftool -y -t error branch
+'
+
+test_expect_success 'difftool forwards exit code with --trust-exit-code' '
+ test_config difftool.error.cmd false &&
+ test_must_fail git difftool -y --trust-exit-code -t error branch
+'
+
+test_expect_success 'difftool forwards exit code with --trust-exit-code for built-ins' '
+ test_config difftool.vimdiff.path false &&
+ test_must_fail git difftool -y --trust-exit-code -t vimdiff branch
+'
+
+test_expect_success 'difftool honors difftool.trustExitCode = true' '
+ test_config difftool.error.cmd false &&
+ test_config difftool.trustExitCode true &&
+ test_must_fail git difftool -y -t error branch
+'
+
+test_expect_success 'difftool honors difftool.trustExitCode = false' '
+ test_config difftool.error.cmd false &&
+ test_config difftool.trustExitCode false &&
+ git difftool -y -t error branch
+'
+
+test_expect_success 'difftool ignores exit code with --no-trust-exit-code' '
+ test_config difftool.error.cmd false &&
+ test_config difftool.trustExitCode true &&
+ git difftool -y --no-trust-exit-code -t error branch
+'
+
+test_expect_success 'difftool stops on error with --trust-exit-code' '
+ test_when_finished "rm -f for-diff .git/fail-right-file" &&
+ test_when_finished "git reset -- for-diff" &&
+ write_script .git/fail-right-file <<-\EOF &&
+ echo failed
+ exit 1
+ EOF
+ >for-diff &&
+ git add for-diff &&
+ test_must_fail git difftool -y --trust-exit-code \
+ --extcmd .git/fail-right-file branch >actual &&
+ test_line_count = 1 actual
+'
+
+test_expect_success 'difftool honors exit status if command not found' '
+ test_config difftool.nonexistent.cmd i-dont-exist &&
+ test_config difftool.trustExitCode false &&
+ test_must_fail git difftool -y -t nonexistent branch
+'
+
+test_expect_success 'difftool honors --gui' '
+ difftool_test_setup &&
+ test_config merge.tool bogus-tool &&
+ test_config diff.tool bogus-tool &&
+ test_config diff.guitool test-tool &&
+
+ echo branch >expect &&
+ git difftool --no-prompt --gui branch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'difftool --gui last setting wins' '
+ difftool_test_setup &&
+ : >expect &&
+ git difftool --no-prompt --gui --no-gui >actual &&
+ test_cmp expect actual &&
+
+ test_config merge.tool bogus-tool &&
+ test_config diff.tool bogus-tool &&
+ test_config diff.guitool test-tool &&
+ echo branch >expect &&
+ git difftool --no-prompt --no-gui --gui branch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'difftool --gui works without configured diff.guitool' '
+ difftool_test_setup &&
+ echo branch >expect &&
+ git difftool --no-prompt --gui branch >actual &&
+ test_cmp expect actual
+'
+
+# Specify the diff tool using $GIT_DIFF_TOOL
+test_expect_success 'GIT_DIFF_TOOL variable' '
+ difftool_test_setup &&
+ git config --unset diff.tool &&
+ echo branch >expect &&
+ GIT_DIFF_TOOL=test-tool git difftool --no-prompt branch >actual &&
+ test_cmp expect actual
+'
+
+# Test the $GIT_*_TOOL variables and ensure
+# that $GIT_DIFF_TOOL always wins unless --tool is specified
+test_expect_success 'GIT_DIFF_TOOL overrides' '
+ difftool_test_setup &&
+ test_config diff.tool bogus-tool &&
+ test_config merge.tool bogus-tool &&
+
+ echo branch >expect &&
+ GIT_DIFF_TOOL=test-tool git difftool --no-prompt branch >actual &&
+ test_cmp expect actual &&
+
+ test_config diff.tool bogus-tool &&
+ test_config merge.tool bogus-tool &&
+ GIT_DIFF_TOOL=bogus-tool \
+ git difftool --no-prompt --tool=test-tool branch >actual &&
+ test_cmp expect actual
+'
+
+# Test that we don't have to pass --no-prompt to difftool
+# when $GIT_DIFFTOOL_NO_PROMPT is true
+test_expect_success 'GIT_DIFFTOOL_NO_PROMPT variable' '
+ difftool_test_setup &&
+ echo branch >expect &&
+ GIT_DIFFTOOL_NO_PROMPT=true git difftool branch >actual &&
+ test_cmp expect actual
+'
+
+# git-difftool supports the difftool.prompt variable.
+# Test that GIT_DIFFTOOL_PROMPT can override difftool.prompt = false
+test_expect_success 'GIT_DIFFTOOL_PROMPT variable' '
+ difftool_test_setup &&
+ test_config difftool.prompt false &&
+ echo >input &&
+ GIT_DIFFTOOL_PROMPT=true git difftool branch <input >output &&
+ prompt=$(tail -1 <output) &&
+ prompt_given "$prompt"
+'
+
+# Test that we don't have to pass --no-prompt when difftool.prompt is false
+test_expect_success 'difftool.prompt config variable is false' '
+ difftool_test_setup &&
+ test_config difftool.prompt false &&
+ echo branch >expect &&
+ git difftool branch >actual &&
+ test_cmp expect actual
+'
+
+# Test that we don't have to pass --no-prompt when mergetool.prompt is false
+test_expect_success 'difftool merge.prompt = false' '
+ difftool_test_setup &&
+ test_might_fail git config --unset difftool.prompt &&
+ test_config mergetool.prompt false &&
+ echo branch >expect &&
+ git difftool branch >actual &&
+ test_cmp expect actual
+'
+
+# Test that the -y flag can override difftool.prompt = true
+test_expect_success 'difftool.prompt can overridden with -y' '
+ difftool_test_setup &&
+ test_config difftool.prompt true &&
+ echo branch >expect &&
+ git difftool -y branch >actual &&
+ test_cmp expect actual
+'
+
+# Test that the --prompt flag can override difftool.prompt = false
+test_expect_success 'difftool.prompt can overridden with --prompt' '
+ difftool_test_setup &&
+ test_config difftool.prompt false &&
+ echo >input &&
+ git difftool --prompt branch <input >output &&
+ prompt=$(tail -1 <output) &&
+ prompt_given "$prompt"
+'
+
+# Test that the last flag passed on the command-line wins
+test_expect_success 'difftool last flag wins' '
+ difftool_test_setup &&
+ echo branch >expect &&
+ git difftool --prompt --no-prompt branch >actual &&
+ test_cmp expect actual &&
+ echo >input &&
+ git difftool --no-prompt --prompt branch <input >output &&
+ prompt=$(tail -1 <output) &&
+ prompt_given "$prompt"
+'
+
+# git-difftool falls back to git-mergetool config variables
+# so test that behavior here
+test_expect_success 'difftool + mergetool config variables' '
+ test_config merge.tool test-tool &&
+ test_config mergetool.test-tool.cmd "cat \$LOCAL" &&
+ echo branch >expect &&
+ git difftool --no-prompt branch >actual &&
+ test_cmp expect actual &&
+ git difftool --gui --no-prompt branch >actual &&
+ test_cmp expect actual &&
+
+ # set merge.tool to something bogus, diff.tool to test-tool
+ test_config merge.tool bogus-tool &&
+ test_config diff.tool test-tool &&
+ git difftool --no-prompt branch >actual &&
+ test_cmp expect actual &&
+ git difftool --gui --no-prompt branch >actual &&
+ test_cmp expect actual &&
+
+ # set merge.tool, diff.tool to something bogus, merge.guitool to test-tool
+ test_config diff.tool bogus-tool &&
+ test_config merge.guitool test-tool &&
+ git difftool --gui --no-prompt branch >actual &&
+ test_cmp expect actual &&
+
+ # set merge.tool, diff.tool, merge.guitool to something bogus, diff.guitool to test-tool
+ test_config merge.guitool bogus-tool &&
+ test_config diff.guitool test-tool &&
+ git difftool --gui --no-prompt branch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'difftool.<tool>.path' '
+ test_config difftool.tkdiff.path echo &&
+ git difftool --tool=tkdiff --no-prompt branch >output &&
+ grep file output >grep-output &&
+ test_line_count = 1 grep-output
+'
+
+test_expect_success 'difftool --extcmd=cat' '
+ echo branch >expect &&
+ echo main >>expect &&
+ git difftool --no-prompt --extcmd=cat branch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'difftool --extcmd cat' '
+ echo branch >expect &&
+ echo main >>expect &&
+ git difftool --no-prompt --extcmd=cat branch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'difftool -x cat' '
+ echo branch >expect &&
+ echo main >>expect &&
+ git difftool --no-prompt -x cat branch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'difftool --extcmd echo arg1' '
+ echo file >expect &&
+ git difftool --no-prompt \
+ --extcmd sh\ -c\ \"echo\ \$1\" branch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'difftool --extcmd cat arg1' '
+ echo main >expect &&
+ git difftool --no-prompt \
+ --extcmd sh\ -c\ \"cat\ \$1\" branch >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'difftool --extcmd cat arg2' '
+ echo branch >expect &&
+ git difftool --no-prompt \
+ --extcmd sh\ -c\ \"cat\ \\\"\$2\\\"\" branch >actual &&
+ test_cmp expect actual
+'
+
+# Create a second file on main and a different version on branch
+test_expect_success 'setup with 2 files different' '
+ echo m2 >file2 &&
+ git add file2 &&
+ git commit -m "added file2" &&
+
+ git checkout branch &&
+ echo br2 >file2 &&
+ git add file2 &&
+ git commit -a -m "branch changed file2" &&
+ git checkout main
+'
+
+test_expect_success 'say no to the first file' '
+ (echo n && echo) >input &&
+ git difftool -x cat branch <input >output &&
+ grep m2 output &&
+ grep br2 output &&
+ ! grep main output &&
+ ! grep branch output
+'
+
+test_expect_success 'say no to the second file' '
+ (echo && echo n) >input &&
+ git difftool -x cat branch <input >output &&
+ grep main output &&
+ grep branch output &&
+ ! grep m2 output &&
+ ! grep br2 output
+'
+
+test_expect_success 'ending prompt input with EOF' '
+ git difftool -x cat branch </dev/null >output &&
+ ! grep main output &&
+ ! grep branch output &&
+ ! grep m2 output &&
+ ! grep br2 output
+'
+
+test_expect_success 'difftool --tool-help' '
+ git difftool --tool-help >output &&
+ grep tool output
+'
+
+test_expect_success 'setup change in subdirectory' '
+ git checkout main &&
+ mkdir sub &&
+ echo main >sub/sub &&
+ git add sub/sub &&
+ git commit -m "added sub/sub" &&
+ git tag v1 &&
+ echo test >>file &&
+ echo test >>sub/sub &&
+ git add file sub/sub &&
+ git commit -m "modified both"
+'
+
+test_expect_success 'difftool -d with growing paths' '
+ a=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa &&
+ git init growing &&
+ (
+ cd growing &&
+ echo "test -f \"\$2/b\"" | write_script .git/test-for-b.sh &&
+ one=$(printf 1 | git hash-object -w --stdin) &&
+ two=$(printf 2 | git hash-object -w --stdin) &&
+ git update-index --add \
+ --cacheinfo 100644,$one,$a --cacheinfo 100644,$two,b &&
+ tree1=$(git write-tree) &&
+ git update-index --add \
+ --cacheinfo 100644,$two,$a --cacheinfo 100644,$one,b &&
+ tree2=$(git write-tree) &&
+ git checkout -- $a &&
+ git difftool -d --extcmd .git/test-for-b.sh $tree1 $tree2
+ )
+'
+
+run_dir_diff_test () {
+ test_expect_success "$1 --no-symlinks" "
+ symlinks=--no-symlinks &&
+ $2
+ "
+ test_expect_success SYMLINKS "$1 --symlinks" "
+ symlinks=--symlinks &&
+ $2
+ "
+}
+
+run_dir_diff_test 'difftool -d' '
+ git difftool -d $symlinks --extcmd ls branch >output &&
+ grep "^sub$" output &&
+ grep "^file$" output
+'
+
+run_dir_diff_test 'difftool --dir-diff' '
+ git difftool --dir-diff $symlinks --extcmd ls branch >output &&
+ grep "^sub$" output &&
+ grep "^file$" output
+'
+
+run_dir_diff_test 'difftool --dir-diff avoids repeated slashes in TMPDIR' '
+ TMPDIR="${TMPDIR:-/tmp}////" \
+ git difftool --dir-diff $symlinks --extcmd echo branch >output &&
+ grep -v // output >actual &&
+ test_line_count = 1 actual
+'
+
+run_dir_diff_test 'difftool --dir-diff ignores --prompt' '
+ git difftool --dir-diff $symlinks --prompt --extcmd ls branch >output &&
+ grep "^sub$" output &&
+ grep "^file$" output
+'
+
+run_dir_diff_test 'difftool --dir-diff branch from subdirectory' '
+ (
+ cd sub &&
+ git difftool --dir-diff $symlinks --extcmd ls branch >output &&
+ # "sub" must only exist in "right"
+ # "file" and "file2" must be listed in both "left" and "right"
+ grep "^sub$" output >sub-output &&
+ test_line_count = 1 sub-output &&
+ grep "^file$" output >file-output &&
+ test_line_count = 2 file-output &&
+ grep "^file2$" output >file2-output &&
+ test_line_count = 2 file2-output
+ )
+'
+
+run_dir_diff_test 'difftool --dir-diff v1 from subdirectory' '
+ (
+ cd sub &&
+ git difftool --dir-diff $symlinks --extcmd ls v1 >output &&
+ # "sub" and "file" exist in both v1 and HEAD.
+ # "file2" is unchanged.
+ grep "^sub$" output >sub-output &&
+ test_line_count = 2 sub-output &&
+ grep "^file$" output >file-output &&
+ test_line_count = 2 file-output &&
+ ! grep "^file2$" output
+ )
+'
+
+run_dir_diff_test 'difftool --dir-diff branch from subdirectory w/ pathspec' '
+ (
+ cd sub &&
+ git difftool --dir-diff $symlinks --extcmd ls branch -- .>output &&
+ # "sub" only exists in "right"
+ # "file" and "file2" must not be listed
+ grep "^sub$" output >sub-output &&
+ test_line_count = 1 sub-output &&
+ ! grep "^file$" output
+ )
+'
+
+run_dir_diff_test 'difftool --dir-diff v1 from subdirectory w/ pathspec' '
+ (
+ cd sub &&
+ git difftool --dir-diff $symlinks --extcmd ls v1 -- .>output &&
+ # "sub" exists in v1 and HEAD
+ # "file" is filtered out by the pathspec
+ grep "^sub$" output >sub-output &&
+ test_line_count = 2 sub-output &&
+ ! grep "^file$" output
+ )
+'
+
+run_dir_diff_test 'difftool --dir-diff from subdirectory with GIT_DIR set' '
+ (
+ GIT_DIR=$(pwd)/.git &&
+ export GIT_DIR &&
+ GIT_WORK_TREE=$(pwd) &&
+ export GIT_WORK_TREE &&
+ cd sub &&
+ git difftool --dir-diff $symlinks --extcmd ls \
+ branch -- sub >output &&
+ grep "^sub$" output &&
+ ! grep "^file$" output
+ )
+'
+
+run_dir_diff_test 'difftool --dir-diff when worktree file is missing' '
+ test_when_finished git reset --hard &&
+ rm file2 &&
+ git difftool --dir-diff $symlinks --extcmd ls branch main >output &&
+ grep "^file2$" output
+'
+
+run_dir_diff_test 'difftool --dir-diff with unmerged files' '
+ test_when_finished git reset --hard &&
+ test_config difftool.echo.cmd "echo ok" &&
+ git checkout -B conflict-a &&
+ git checkout -B conflict-b &&
+ git checkout conflict-a &&
+ echo a >>file &&
+ git add file &&
+ git commit -m conflict-a &&
+ git checkout conflict-b &&
+ echo b >>file &&
+ git add file &&
+ git commit -m conflict-b &&
+ git checkout main &&
+ git merge conflict-a &&
+ test_must_fail git merge conflict-b &&
+ cat >expect <<-EOF &&
+ ok
+ EOF
+ git difftool --dir-diff $symlinks -t echo >actual &&
+ test_cmp expect actual
+'
+
+write_script .git/CHECK_SYMLINKS <<\EOF
+for f in file file2 sub/sub
+do
+ echo "$f"
+ ls -ld "$2/$f" | sed -e 's/.* -> //'
+done >actual
+EOF
+
+test_expect_success SYMLINKS 'difftool --dir-diff --symlinks without unstaged changes' '
+ cat >expect <<-EOF &&
+ file
+ $PWD/file
+ file2
+ $PWD/file2
+ sub/sub
+ $PWD/sub/sub
+ EOF
+ git difftool --dir-diff --symlinks \
+ --extcmd "./.git/CHECK_SYMLINKS" branch HEAD &&
+ test_cmp expect actual
+'
+
+write_script modify-right-file <<\EOF
+echo "new content" >"$2/file"
+EOF
+
+run_dir_diff_test 'difftool --dir-diff syncs worktree with unstaged change' '
+ test_when_finished git reset --hard &&
+ echo "orig content" >file &&
+ git difftool -d $symlinks --extcmd "$PWD/modify-right-file" branch &&
+ echo "new content" >expect &&
+ test_cmp expect file
+'
+
+run_dir_diff_test 'difftool --dir-diff syncs worktree without unstaged change' '
+ test_when_finished git reset --hard &&
+ git difftool -d $symlinks --extcmd "$PWD/modify-right-file" branch &&
+ echo "new content" >expect &&
+ test_cmp expect file
+'
+
+write_script modify-file <<\EOF
+echo "new content" >file
+EOF
+
+test_expect_success 'difftool --no-symlinks does not overwrite working tree file ' '
+ echo "orig content" >file &&
+ git difftool --dir-diff --no-symlinks --extcmd "$PWD/modify-file" branch &&
+ echo "new content" >expect &&
+ test_cmp expect file
+'
+
+write_script modify-both-files <<\EOF
+echo "wt content" >file &&
+echo "tmp content" >"$2/file" &&
+echo "$2" >tmpdir
+EOF
+
+test_expect_success 'difftool --no-symlinks detects conflict ' '
+ (
+ TMPDIR=$TRASH_DIRECTORY &&
+ export TMPDIR &&
+ echo "orig content" >file &&
+ test_must_fail git difftool --dir-diff --no-symlinks --extcmd "$PWD/modify-both-files" branch &&
+ echo "wt content" >expect &&
+ test_cmp expect file &&
+ echo "tmp content" >expect &&
+ test_cmp expect "$(cat tmpdir)/file"
+ )
+'
+
+test_expect_success 'difftool properly honors gitlink and core.worktree' '
+ test_when_finished rm -rf submod/ule &&
+ test_config_global protocol.file.allow always &&
+ git submodule add ./. submod/ule &&
+ test_config -C submod/ule diff.tool checktrees &&
+ test_config -C submod/ule difftool.checktrees.cmd '\''
+ test -d "$LOCAL" && test -d "$REMOTE" && echo good
+ '\'' &&
+ (
+ cd submod/ule &&
+ echo good >expect &&
+ git difftool --tool=checktrees --dir-diff HEAD~ >actual &&
+ test_cmp expect actual &&
+ rm -f expect actual
+ )
+'
+
+test_expect_success SYMLINKS 'difftool --dir-diff symlinked directories' '
+ test_when_finished git reset --hard &&
+ git init dirlinks &&
+ (
+ cd dirlinks &&
+ git config diff.tool checktrees &&
+ git config difftool.checktrees.cmd "echo good" &&
+ mkdir foo &&
+ : >foo/bar &&
+ git add foo/bar &&
+ test_commit symlink-one &&
+ ln -s foo link &&
+ git add link &&
+ test_commit symlink-two &&
+ echo good >expect &&
+ git difftool --tool=checktrees --dir-diff HEAD~ >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success SYMLINKS 'difftool --dir-diff handles modified symlinks' '
+ test_when_finished git reset --hard &&
+ touch b &&
+ ln -s b c &&
+ git add b c &&
+ test_tick &&
+ git commit -m initial &&
+ touch d &&
+ rm c &&
+ ln -s d c &&
+ cat >expect <<-EOF &&
+ c
+
+ c
+ EOF
+ git difftool --symlinks --dir-diff --extcmd ls >output &&
+ grep -v ^/ output >actual &&
+ test_cmp expect actual &&
+
+ git difftool --no-symlinks --dir-diff --extcmd ls >output &&
+ grep -v ^/ output >actual &&
+ test_cmp expect actual &&
+
+ # The left side contains symlink "c" that points to "b"
+ test_config difftool.cat.cmd "cat \$LOCAL/c" &&
+ printf "%s\n" b >expect &&
+
+ git difftool --symlinks --dir-diff --tool cat >actual &&
+ test_cmp expect actual &&
+
+ git difftool --symlinks --no-symlinks --dir-diff --tool cat >actual &&
+ test_cmp expect actual &&
+
+ # The right side contains symlink "c" that points to "d"
+ test_config difftool.cat.cmd "cat \$REMOTE/c" &&
+ printf "%s\n" d >expect &&
+
+ git difftool --symlinks --dir-diff --tool cat >actual &&
+ test_cmp expect actual &&
+
+ git difftool --no-symlinks --dir-diff --tool cat >actual &&
+ test_cmp expect actual &&
+
+ # Deleted symlinks
+ rm -f c &&
+ cat >expect <<-EOF &&
+ c
+
+ EOF
+ git difftool --symlinks --dir-diff --extcmd ls >output &&
+ grep -v ^/ output >actual &&
+ test_cmp expect actual &&
+
+ git difftool --no-symlinks --dir-diff --extcmd ls >output &&
+ grep -v ^/ output >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success SYMLINKS 'difftool --dir-diff writes symlinks as raw text' '
+ # Start out on a branch called "branch-init".
+ git init -b branch-init symlink-files &&
+ (
+ cd symlink-files &&
+ # This test ensures that symlinks are written as raw text.
+ # The "cat" tools output link and file contents.
+ git config difftool.cat-left-link.cmd "cat \"\$LOCAL/link\"" &&
+ git config difftool.cat-left-a.cmd "cat \"\$LOCAL/file-a\"" &&
+ git config difftool.cat-right-link.cmd "cat \"\$REMOTE/link\"" &&
+ git config difftool.cat-right-b.cmd "cat \"\$REMOTE/file-b\"" &&
+
+ # Record the empty initial state so that we can come back here
+ # later and not have to consider the any cases where difftool
+ # will create symlinks back into the worktree.
+ test_tick &&
+ git commit --allow-empty -m init &&
+
+ # Create a file called "file-a" with a symlink pointing to it.
+ git switch -c branch-a &&
+ echo a >file-a &&
+ ln -s file-a link &&
+ git add file-a link &&
+ test_tick &&
+ git commit -m link-to-file-a &&
+
+ # Create a file called "file-b" and point the symlink to it.
+ git switch -c branch-b &&
+ echo b >file-b &&
+ rm link &&
+ ln -s file-b link &&
+ git add file-b link &&
+ git rm file-a &&
+ test_tick &&
+ git commit -m link-to-file-b &&
+
+ # Checkout the initial branch so that the --symlinks behavior is
+ # not activated. The two directories should be completely
+ # independent with no symlinks pointing back here.
+ git switch branch-init &&
+
+ # The left link must be "file-a" and "file-a" must contain "a".
+ echo file-a >expect &&
+ git difftool --symlinks --dir-diff --tool cat-left-link \
+ branch-a branch-b >actual &&
+ test_cmp expect actual &&
+
+ echo a >expect &&
+ git difftool --symlinks --dir-diff --tool cat-left-a \
+ branch-a branch-b >actual &&
+ test_cmp expect actual &&
+
+ # The right link must be "file-b" and "file-b" must contain "b".
+ echo file-b >expect &&
+ git difftool --symlinks --dir-diff --tool cat-right-link \
+ branch-a branch-b >actual &&
+ test_cmp expect actual &&
+
+ echo b >expect &&
+ git difftool --symlinks --dir-diff --tool cat-right-b \
+ branch-a branch-b >actual &&
+ test_cmp expect actual
+ )
+'
+
+test_expect_success 'add -N and difftool -d' '
+ test_when_finished git reset --hard &&
+
+ test_write_lines A B C >intent-to-add &&
+ git add -N intent-to-add &&
+ git difftool --dir-diff --extcmd ls
+'
+
+test_expect_success 'difftool --cached with unmerged files' '
+ test_when_finished git reset --hard &&
+
+ test_commit conflicting &&
+ test_commit conflict-a conflict.t a &&
+ git reset --hard conflicting &&
+ test_commit conflict-b conflict.t b &&
+ test_must_fail git merge conflict-a &&
+
+ git difftool --cached --no-prompt >output &&
+ test_must_be_empty output
+'
+
+test_expect_success 'outside worktree' '
+ echo 1 >1 &&
+ echo 2 >2 &&
+ test_expect_code 1 nongit git \
+ -c diff.tool=echo -c difftool.echo.cmd="echo \$LOCAL \$REMOTE" \
+ difftool --no-prompt --no-index ../1 ../2 >actual &&
+ echo "../1 ../2" >expect &&
+ test_cmp expect actual
+'
+
+test_expect_success 'difftool --gui, --tool and --extcmd are mutually exclusive' '
+ difftool_test_setup &&
+ test_must_fail git difftool --gui --tool=test-tool &&
+ test_must_fail git difftool --gui --extcmd=cat &&
+ test_must_fail git difftool --tool=test-tool --extcmd=cat &&
+ test_must_fail git difftool --gui --tool=test-tool --extcmd=cat
+'
+
+test_expect_success 'difftool --rotate-to' '
+ difftool_test_setup &&
+ test_when_finished git reset --hard &&
+ echo 1 >1 &&
+ echo 2 >2 &&
+ echo 4 >4 &&
+ git add 1 2 4 &&
+ git commit -a -m "124" &&
+ git difftool --no-prompt --extcmd=cat --rotate-to="2" HEAD^ >output &&
+ cat >expect <<-\EOF &&
+ 2
+ 4
+ 1
+ EOF
+ test_cmp output expect
+'
+
+test_expect_success 'difftool --skip-to' '
+ difftool_test_setup &&
+ test_when_finished git reset --hard &&
+ git difftool --no-prompt --extcmd=cat --skip-to="2" HEAD^ >output &&
+ cat >expect <<-\EOF &&
+ 2
+ 4
+ EOF
+ test_cmp output expect
+'
+
+test_expect_success 'difftool --rotate/skip-to error condition' '
+ test_must_fail git difftool --no-prompt --extcmd=cat --rotate-to="3" HEAD^ &&
+ test_must_fail git difftool --no-prompt --extcmd=cat --skip-to="3" HEAD^
+'
+test_done