1 files changed, 510 insertions, 0 deletions
diff --git a/t/t6050-replace.sh b/t/t6050-replace.sh
new file mode 100755
index 0000000..c6e9b33
--- /dev/null
+++ b/t/t6050-replace.sh
@@ -0,0 +1,510 @@
+#!/bin/sh
+#
+# Copyright (c) 2008 Christian Couder
+#
+test_description='Tests replace refs functionality'
+
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
+export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
+
+. ./test-lib.sh
+. "$TEST_DIRECTORY/lib-gpg.sh"
+
+add_and_commit_file ()
+{
+    _file="$1"
+    _msg="$2"
+
+    git add $_file || return $?
+    test_tick || return $?
+    git commit --quiet -m "$_file: $_msg"
+}
+
+commit_buffer_contains_parents ()
+{
+    git cat-file commit "$1" >payload &&
+    sed -n -e '/^$/q' -e '/^parent /p' <payload >actual &&
+    shift &&
+    for _parent
+    do
+	echo "parent $_parent"
+    done >expected &&
+    test_cmp expected actual
+}
+
+commit_peeling_shows_parents ()
+{
+    _parent_number=1
+    _commit="$1"
+    shift &&
+    for _parent
+    do
+	_found=$(git rev-parse --verify $_commit^$_parent_number) || return 1
+	test "$_found" = "$_parent" || return 1
+	_parent_number=$(( $_parent_number + 1 ))
+    done &&
+    test_must_fail git rev-parse --verify $_commit^$_parent_number 2>err &&
+    test_grep "Needed a single revision" err
+}
+
+commit_has_parents ()
+{
+    commit_buffer_contains_parents "$@" &&
+    commit_peeling_shows_parents "$@"
+}
+
+HASH1=
+HASH2=
+HASH3=
+HASH4=
+HASH5=
+HASH6=
+HASH7=
+
+test_expect_success 'set up buggy branch' '
+	echo "line 1" >>hello &&
+	echo "line 2" >>hello &&
+	echo "line 3" >>hello &&
+	echo "line 4" >>hello &&
+	add_and_commit_file hello "4 lines" &&
+	HASH1=$(git rev-parse --verify HEAD) &&
+	echo "line BUG" >>hello &&
+	echo "line 6" >>hello &&
+	echo "line 7" >>hello &&
+	echo "line 8" >>hello &&
+	add_and_commit_file hello "4 more lines with a BUG" &&
+	HASH2=$(git rev-parse --verify HEAD) &&
+	echo "line 9" >>hello &&
+	echo "line 10" >>hello &&
+	add_and_commit_file hello "2 more lines" &&
+	HASH3=$(git rev-parse --verify HEAD) &&
+	echo "line 11" >>hello &&
+	add_and_commit_file hello "1 more line" &&
+	HASH4=$(git rev-parse --verify HEAD) &&
+	sed -e "s/BUG/5/" hello >hello.new &&
+	mv hello.new hello &&
+	add_and_commit_file hello "BUG fixed" &&
+	HASH5=$(git rev-parse --verify HEAD) &&
+	echo "line 12" >>hello &&
+	echo "line 13" >>hello &&
+	add_and_commit_file hello "2 more lines" &&
+	HASH6=$(git rev-parse --verify HEAD) &&
+	echo "line 14" >>hello &&
+	echo "line 15" >>hello &&
+	echo "line 16" >>hello &&
+	add_and_commit_file hello "again 3 more lines" &&
+	HASH7=$(git rev-parse --verify HEAD)
+'
+
+test_expect_success 'replace the author' '
+	git cat-file commit $HASH2 | grep "author A U Thor" &&
+	R=$(git cat-file commit $HASH2 | sed -e "s/A U/O/" | git hash-object -t commit --stdin -w) &&
+	git cat-file commit $R | grep "author O Thor" &&
+	git update-ref refs/replace/$HASH2 $R &&
+	git show HEAD~5 | grep "O Thor" &&
+	git show $HASH2 | grep "O Thor"
+'
+
+test_expect_success 'test --no-replace-objects option' '
+	git cat-file commit $HASH2 | grep "author O Thor" &&
+	git --no-replace-objects cat-file commit $HASH2 | grep "author A U Thor" &&
+	git show $HASH2 | grep "O Thor" &&
+	git --no-replace-objects show $HASH2 | grep "A U Thor"
+'
+
+test_expect_success 'test GIT_NO_REPLACE_OBJECTS env variable' '
+	GIT_NO_REPLACE_OBJECTS=1 git cat-file commit $HASH2 | grep "author A U Thor" &&
+	GIT_NO_REPLACE_OBJECTS=1 git show $HASH2 | grep "A U Thor"
+'
+
+test_expect_success 'test core.usereplacerefs config option' '
+	test_config core.usereplacerefs false &&
+	git cat-file commit $HASH2 | grep "author A U Thor" &&
+	git show $HASH2 | grep "A U Thor"
+'
+
+cat >tag.sig <<EOF
+object $HASH2
+type commit
+tag mytag
+tagger T A Gger <> 0 +0000
+
+EOF
+
+test_expect_success 'tag replaced commit' '
+	git update-ref refs/tags/mytag $(git mktag <tag.sig)
+'
+
+test_expect_success '"git fsck" works' '
+	git fsck main >fsck_main.out &&
+	test_grep "dangling commit $R" fsck_main.out &&
+	test_grep "dangling tag $(git show-ref -s refs/tags/mytag)" fsck_main.out &&
+	test -z "$(git fsck)"
+'
+
+test_expect_success 'repack, clone and fetch work' '
+	git repack -a -d &&
+	git clone --no-hardlinks . clone_dir &&
+	(
+		cd clone_dir &&
+		git show HEAD~5 | grep "A U Thor" &&
+		git show $HASH2 | grep "A U Thor" &&
+		git cat-file commit $R &&
+		git repack -a -d &&
+		test_must_fail git cat-file commit $R &&
+		git fetch ../ "refs/replace/*:refs/replace/*" &&
+		git show HEAD~5 | grep "O Thor" &&
+		git show $HASH2 | grep "O Thor" &&
+		git cat-file commit $R
+	)
+'
+
+test_expect_success '"git replace" listing and deleting' '
+	test "$HASH2" = "$(git replace -l)" &&
+	test "$HASH2" = "$(git replace)" &&
+	aa=${HASH2%??????????????????????????????????????} &&
+	test "$HASH2" = "$(git replace --list "$aa*")" &&
+	test_must_fail git replace -d $R &&
+	test_must_fail git replace --delete &&
+	test_must_fail git replace -l -d $HASH2 &&
+	git replace -d $HASH2 &&
+	git show $HASH2 | grep "A U Thor" &&
+	test -z "$(git replace -l)"
+'
+
+test_expect_success '"git replace" replacing' '
+	git replace $HASH2 $R &&
+	git show $HASH2 | grep "O Thor" &&
+	test_must_fail git replace $HASH2 $R &&
+	git replace -f $HASH2 $R &&
+	test_must_fail git replace -f &&
+	test "$HASH2" = "$(git replace)"
+'
+
+test_expect_success '"git replace" resolves sha1' '
+	SHORTHASH2=$(git rev-parse --short=8 $HASH2) &&
+	git replace -d $SHORTHASH2 &&
+	git replace $SHORTHASH2 $R &&
+	git show $HASH2 | grep "O Thor" &&
+	test_must_fail git replace $HASH2 $R &&
+	git replace -f $HASH2 $R &&
+	test_must_fail git replace --force &&
+	test "$HASH2" = "$(git replace)"
+'
+
+# This creates a side branch where the bug in H2
+# does not appear because P2 is created by applying
+# H2 and squashing H5 into it.
+# P3, P4 and P6 are created by cherry-picking H3, H4
+# and H6 respectively.
+#
+# At this point, we should have the following:
+#
+#    P2--P3--P4--P6
+#   /
+# H1-H2-H3-H4-H5-H6-H7
+#
+# Then we replace H6 with P6.
+#
+test_expect_success 'create parallel branch without the bug' '
+	git replace -d $HASH2 &&
+	git show $HASH2 | grep "A U Thor" &&
+	git checkout $HASH1 &&
+	git cherry-pick $HASH2 &&
+	git show $HASH5 | git apply &&
+	git commit --amend -m "hello: 4 more lines WITHOUT the bug" hello &&
+	PARA2=$(git rev-parse --verify HEAD) &&
+	git cherry-pick $HASH3 &&
+	PARA3=$(git rev-parse --verify HEAD) &&
+	git cherry-pick $HASH4 &&
+	PARA4=$(git rev-parse --verify HEAD) &&
+	git cherry-pick $HASH6 &&
+	PARA6=$(git rev-parse --verify HEAD) &&
+	git replace $HASH6 $PARA6 &&
+	git checkout main &&
+	cur=$(git rev-parse --verify HEAD) &&
+	test "$cur" = "$HASH7" &&
+	git log --pretty=oneline | grep $PARA2 &&
+	git remote add cloned ./clone_dir
+'
+
+test_expect_success 'push to cloned repo' '
+	git push cloned $HASH6^:refs/heads/parallel &&
+	(
+		cd clone_dir &&
+		git checkout parallel &&
+		git log --pretty=oneline | grep $PARA2
+	)
+'
+
+test_expect_success 'push branch with replacement' '
+	git cat-file commit $PARA3 | grep "author A U Thor" &&
+	S=$(git cat-file commit $PARA3 | sed -e "s/A U/O/" | git hash-object -t commit --stdin -w) &&
+	git cat-file commit $S | grep "author O Thor" &&
+	git replace $PARA3 $S &&
+	git show $HASH6~2 | grep "O Thor" &&
+	git show $PARA3 | grep "O Thor" &&
+	git push cloned $HASH6^:refs/heads/parallel2 &&
+	(
+		cd clone_dir &&
+		git checkout parallel2 &&
+		git log --pretty=oneline | grep $PARA3 &&
+		git show $PARA3 | grep "A U Thor"
+	)
+'
+
+test_expect_success 'fetch branch with replacement' '
+	git branch tofetch $HASH6 &&
+	(
+		cd clone_dir &&
+		git fetch origin refs/heads/tofetch:refs/heads/parallel3 &&
+		git log --pretty=oneline parallel3 >output.txt &&
+		! grep $PARA3 output.txt &&
+		git show $PARA3 >para3.txt &&
+		grep "A U Thor" para3.txt &&
+		git fetch origin "refs/replace/*:refs/replace/*" &&
+		git log --pretty=oneline parallel3 >output.txt &&
+		grep $PARA3 output.txt &&
+		git show $PARA3 >para3.txt &&
+		grep "O Thor" para3.txt
+	)
+'
+
+test_expect_success 'bisect and replacements' '
+	git bisect start $HASH7 $HASH1 &&
+	test "$PARA3" = "$(git rev-parse --verify HEAD)" &&
+	git bisect reset &&
+	GIT_NO_REPLACE_OBJECTS=1 git bisect start $HASH7 $HASH1 &&
+	test "$HASH4" = "$(git rev-parse --verify HEAD)" &&
+	git bisect reset &&
+	git --no-replace-objects bisect start $HASH7 $HASH1 &&
+	test "$HASH4" = "$(git rev-parse --verify HEAD)" &&
+	git bisect reset
+'
+
+test_expect_success 'index-pack and replacements' '
+	git --no-replace-objects rev-list --objects HEAD |
+	git --no-replace-objects pack-objects test- &&
+	git index-pack test-*.pack
+'
+
+test_expect_success 'not just commits' '
+	echo replaced >file &&
+	git add file &&
+	REPLACED=$(git rev-parse :file) &&
+	mv file file.replaced &&
+
+	echo original >file &&
+	git add file &&
+	ORIGINAL=$(git rev-parse :file) &&
+	git update-ref refs/replace/$ORIGINAL $REPLACED &&
+	mv file file.original &&
+
+	git checkout file &&
+	test_cmp file.replaced file
+'
+
+test_expect_success 'replaced and replacement objects must be of the same type' '
+	test_must_fail git replace mytag $HASH1 &&
+	test_must_fail git replace HEAD^{tree} HEAD~1 &&
+	BLOB=$(git rev-parse :file) &&
+	test_must_fail git replace HEAD^ $BLOB
+'
+
+test_expect_success '-f option bypasses the type check' '
+	git replace -f mytag $HASH1 &&
+	git replace --force HEAD^{tree} HEAD~1 &&
+	git replace -f HEAD^ $BLOB
+'
+
+test_expect_success 'git cat-file --batch works on replace objects' '
+	git replace | grep $PARA3 &&
+	echo $PARA3 | git cat-file --batch
+'
+
+test_expect_success 'test --format bogus' '
+	test_must_fail git replace --format bogus >/dev/null 2>&1
+'
+
+test_expect_success 'test --format short' '
+	git replace --format=short >actual &&
+	git replace >expected &&
+	test_cmp expected actual
+'
+
+test_expect_success 'test --format medium' '
+	H1=$(git --no-replace-objects rev-parse HEAD~1) &&
+	HT=$(git --no-replace-objects rev-parse HEAD^{tree}) &&
+	MYTAG=$(git --no-replace-objects rev-parse mytag) &&
+	{
+		echo "$H1 -> $BLOB" &&
+		echo "$BLOB -> $REPLACED" &&
+		echo "$HT -> $H1" &&
+		echo "$PARA3 -> $S" &&
+		echo "$MYTAG -> $HASH1"
+	} | sort >expected &&
+	git replace -l --format medium | sort >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success 'test --format long' '
+	{
+		echo "$H1 (commit) -> $BLOB (blob)" &&
+		echo "$BLOB (blob) -> $REPLACED (blob)" &&
+		echo "$HT (tree) -> $H1 (commit)" &&
+		echo "$PARA3 (commit) -> $S (commit)" &&
+		echo "$MYTAG (tag) -> $HASH1 (commit)"
+	} | sort >expected &&
+	git replace --format=long | sort >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success 'setup fake editors' '
+	write_script fakeeditor <<-\EOF &&
+		sed -e "s/A U Thor/A fake Thor/" "$1" >"$1.new"
+		mv "$1.new" "$1"
+	EOF
+	write_script failingfakeeditor <<-\EOF
+		./fakeeditor "$@"
+		false
+	EOF
+'
+
+test_expect_success '--edit with and without already replaced object' '
+	test_must_fail env GIT_EDITOR=./fakeeditor git replace --edit "$PARA3" &&
+	GIT_EDITOR=./fakeeditor git replace --force --edit "$PARA3" &&
+	git replace -l | grep "$PARA3" &&
+	git cat-file commit "$PARA3" | grep "A fake Thor" &&
+	git replace -d "$PARA3" &&
+	GIT_EDITOR=./fakeeditor git replace --edit "$PARA3" &&
+	git replace -l | grep "$PARA3" &&
+	git cat-file commit "$PARA3" | grep "A fake Thor"
+'
+
+test_expect_success '--edit and change nothing or command failed' '
+	git replace -d "$PARA3" &&
+	test_must_fail env GIT_EDITOR=true git replace --edit "$PARA3" &&
+	test_must_fail env GIT_EDITOR="./failingfakeeditor" git replace --edit "$PARA3" &&
+	GIT_EDITOR=./fakeeditor git replace --edit "$PARA3" &&
+	git replace -l | grep "$PARA3" &&
+	git cat-file commit "$PARA3" | grep "A fake Thor"
+'
+
+test_expect_success 'replace ref cleanup' '
+	test -n "$(git replace)" &&
+	git replace -d $(git replace) &&
+	test -z "$(git replace)"
+'
+
+test_expect_success '--graft with and without already replaced object' '
+	git log --oneline >log &&
+	test_line_count = 7 log &&
+	git replace --graft $HASH5 &&
+	git log --oneline >log &&
+	test_line_count = 3 log &&
+	commit_has_parents $HASH5 &&
+	test_must_fail git replace --graft $HASH5 $HASH4 $HASH3 &&
+	git replace --force -g $HASH5 $HASH4 $HASH3 &&
+	commit_has_parents $HASH5 $HASH4 $HASH3 &&
+	git replace -d $HASH5
+'
+
+test_expect_success '--graft using a tag as the new parent' '
+	git tag new_parent $HASH5 &&
+	git replace --graft $HASH7 new_parent &&
+	commit_has_parents $HASH7 $HASH5 &&
+	git replace -d $HASH7 &&
+	git tag -a -m "annotated new parent tag" annotated_new_parent $HASH5 &&
+	git replace --graft $HASH7 annotated_new_parent &&
+	commit_has_parents $HASH7 $HASH5 &&
+	git replace -d $HASH7
+'
+
+test_expect_success '--graft using a tag as the replaced object' '
+	git tag replaced_object $HASH7 &&
+	git replace --graft replaced_object $HASH5 &&
+	commit_has_parents $HASH7 $HASH5 &&
+	git replace -d $HASH7 &&
+	git tag -a -m "annotated replaced object tag" annotated_replaced_object $HASH7 &&
+	git replace --graft annotated_replaced_object $HASH5 &&
+	commit_has_parents $HASH7 $HASH5 &&
+	git replace -d $HASH7
+'
+
+test_expect_success GPG 'set up a signed commit' '
+	echo "line 17" >>hello &&
+	echo "line 18" >>hello &&
+	git add hello &&
+	test_tick &&
+	git commit --quiet -S -m "hello: 2 more lines in a signed commit" &&
+	HASH8=$(git rev-parse --verify HEAD) &&
+	git verify-commit $HASH8
+'
+
+test_expect_success GPG '--graft with a signed commit' '
+	git cat-file commit $HASH8 >orig &&
+	git replace --graft $HASH8 &&
+	git cat-file commit $HASH8 >repl &&
+	commit_has_parents $HASH8 &&
+	test_must_fail git verify-commit $HASH8 &&
+	sed -n -e "/^tree /p" -e "/^author /p" -e "/^committer /p" orig >expected &&
+	echo >>expected &&
+	sed -e "/^$/q" repl >actual &&
+	test_cmp expected actual &&
+	git replace -d $HASH8
+'
+
+test_expect_success GPG 'set up a merge commit with a mergetag' '
+	git reset --hard HEAD &&
+	git checkout -b test_branch HEAD~2 &&
+	echo "line 1 from test branch" >>hello &&
+	echo "line 2 from test branch" >>hello &&
+	git add hello &&
+	test_tick &&
+	git commit -m "hello: 2 more lines from a test branch" &&
+	HASH9=$(git rev-parse --verify HEAD) &&
+	git tag -s -m "tag for testing with a mergetag" test_tag HEAD &&
+	git checkout main &&
+	git merge -s ours test_tag &&
+	HASH10=$(git rev-parse --verify HEAD) &&
+	git cat-file commit $HASH10 | grep "^mergetag object"
+'
+
+test_expect_success GPG '--graft on a commit with a mergetag' '
+	test_must_fail git replace --graft $HASH10 $HASH8^1 &&
+	git replace --graft $HASH10 $HASH8^1 $HASH9 &&
+	git replace -d $HASH10
+'
+
+test_expect_success '--convert-graft-file' '
+	git checkout -b with-graft-file &&
+	test_commit root2 &&
+	git reset --hard root2^ &&
+	test_commit root1 &&
+	test_commit after-root1 &&
+	test_tick &&
+	git merge -m merge-root2 root2 &&
+
+	: add and convert graft file &&
+	printf "%s\n%s %s\n\n# comment\n%s\n" \
+		$(git rev-parse HEAD^^ HEAD^ HEAD^^ HEAD^2) \
+		>.git/info/grafts &&
+	git status 2>stderr &&
+	test_grep "hint:.*grafts is deprecated" stderr &&
+	git replace --convert-graft-file 2>stderr &&
+	test_grep ! "hint:.*grafts is deprecated" stderr &&
+	test_path_is_missing .git/info/grafts &&
+
+	: verify that the history is now "grafted" &&
+	git rev-list HEAD >out &&
+	test_line_count = 4 out &&
+
+	: create invalid graft file and verify that it is not deleted &&
+	test_when_finished "rm -f .git/info/grafts" &&
+	echo $EMPTY_BLOB $EMPTY_TREE >.git/info/grafts &&
+	test_must_fail git replace --convert-graft-file 2>err &&
+	test_grep "$EMPTY_BLOB $EMPTY_TREE" err &&
+	test_grep "$EMPTY_BLOB $EMPTY_TREE" .git/info/grafts
+'
+
+test_done