t/t6200-fmt-merge-msg.sh - jrn/git - Git at Google

 #!/bin/sh
 #
 # Copyright (c) 2006, Junio C Hamano
 #

 test_description='fmt-merge-msg test'

 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

 . ./test-lib.sh
 . "$TEST_DIRECTORY/lib-gpg.sh"

 test_expect_success setup '
 	echo one >one &&
 	git add one &&
 	test_tick &&
 	git commit -m "Initial" &&

 	git clone . remote &&

 	echo uno >one &&
 	echo dos >two &&
 	git add two &&
 	test_tick &&
 	git commit -a -m "Second" &&

 	git checkout -b left &&

 	echo "c1" >one &&
 	test_tick &&
 	git commit -a -m "Common #1" &&

 	echo "c2" >one &&
 	test_tick &&
 	git commit -a -m "Common #2" &&

 	git branch right &&

 	echo "l3" >two &&
 	test_tick &&
 	GIT_COMMITTER_NAME="Another Committer" \
 	GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #3" &&

 	echo "l4" >two &&
 	test_tick &&
 	GIT_COMMITTER_NAME="Another Committer" \
 	GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #4" &&

 	echo "l5" >two &&
 	test_tick &&
 	GIT_COMMITTER_NAME="Another Committer" \
 	GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #5" &&
 	git tag tag-l5 &&

 	git checkout right &&

 	echo "r3" >three &&
 	git add three &&
 	test_tick &&
 	git commit -a -m "Right #3" &&
 	git tag tag-r3 &&

 	echo "r4" >three &&
 	test_tick &&
 	git commit -a -m "Right #4" &&

 	echo "r5" >three &&
 	test_tick &&
 	git commit -a -m "Right #5" &&

 	git checkout -b long &&
 	test_commit_bulk --start=0 --message=%s --filename=one 30 &&

 	git show-branch &&

 	apos="'\''"
 '

 test_expect_success GPG 'set up a signed tag' '
 	git tag -s -m signed-tag-msg signed-good-tag left
 '

 test_expect_success GPGSSH 'created ssh signed commit and tag' '
 	test_config gpg.format ssh &&
 	git checkout -b signed-ssh &&
 	touch file &&
 	git add file &&
 	git commit -m "ssh signed" -S"${GPGSSH_KEY_PRIMARY}" &&
 	git tag -s -u"${GPGSSH_KEY_PRIMARY}" -m signed-ssh-tag-msg signed-good-ssh-tag left &&
 	git tag -s -u"${GPGSSH_KEY_UNTRUSTED}" -m signed-ssh-tag-msg-untrusted signed-untrusted-ssh-tag left
 '

 test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'create signed tags with keys having defined lifetimes' '
 	test_when_finished "test_unconfig commit.gpgsign" &&
 	test_config gpg.format ssh &&
 	git checkout -b signed-expiry-ssh &&
 	touch file &&
 	git add file &&

 	echo expired >file && test_tick && git commit -a -m expired -S"${GPGSSH_KEY_EXPIRED}" &&
 	git tag -s -u "${GPGSSH_KEY_EXPIRED}" -m expired-signed expired-signed &&

 	echo notyetvalid >file && test_tick && git commit -a -m notyetvalid -S"${GPGSSH_KEY_NOTYETVALID}" &&
 	git tag -s -u "${GPGSSH_KEY_NOTYETVALID}" -m notyetvalid-signed notyetvalid-signed &&

 	echo timeboxedvalid >file && test_tick && git commit -a -m timeboxedvalid -S"${GPGSSH_KEY_TIMEBOXEDVALID}" &&
 	git tag -s -u "${GPGSSH_KEY_TIMEBOXEDVALID}" -m timeboxedvalid-signed timeboxedvalid-signed &&

 	echo timeboxedinvalid >file && test_tick && git commit -a -m timeboxedinvalid -S"${GPGSSH_KEY_TIMEBOXEDINVALID}" &&
 	git tag -s -u "${GPGSSH_KEY_TIMEBOXEDINVALID}" -m timeboxedinvalid-signed timeboxedinvalid-signed
 '

 test_expect_success 'message for merging local branch' '
 	echo "Merge branch ${apos}left${apos}" >expected &&

 	git checkout main &&
 	git fetch . left &&

 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success GPG 'message for merging local tag signed by good key' '
 	git checkout main &&
 	git fetch . signed-good-tag &&
 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	grep "^Merge tag ${apos}signed-good-tag${apos}" actual &&
 	grep "^signed-tag-msg" actual &&
 	grep "^# gpg: Signature made" actual &&
 	grep "^# gpg: Good signature from" actual
 '

 test_expect_success GPG 'message for merging local tag signed by unknown key' '
 	git checkout main &&
 	git fetch . signed-good-tag &&
 	GNUPGHOME=. git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	grep "^Merge tag ${apos}signed-good-tag${apos}" actual &&
 	grep "^signed-tag-msg" actual &&
 	grep "^# gpg: Signature made" actual &&
 	grep -E "^# gpg: Can${apos}t check signature: (public key not found|No public key)" actual
 '

 test_expect_success GPGSSH 'message for merging local tag signed by good ssh key' '
 	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
 	git checkout main &&
 	git fetch . signed-good-ssh-tag &&
 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	grep "^Merge tag ${apos}signed-good-ssh-tag${apos}" actual &&
 	grep "^signed-ssh-tag-msg" actual &&
 	grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
 	! grep "${GPGSSH_BAD_SIGNATURE}" actual
 '

 test_expect_success GPGSSH 'message for merging local tag signed by unknown ssh key' '
 	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
 	git checkout main &&
 	git fetch . signed-untrusted-ssh-tag &&
 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	grep "^Merge tag ${apos}signed-untrusted-ssh-tag${apos}" actual &&
 	grep "^signed-ssh-tag-msg-untrusted" actual &&
 	grep "${GPGSSH_GOOD_SIGNATURE_UNTRUSTED}" actual &&
 	! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
 	grep "${GPGSSH_KEY_NOT_TRUSTED}" actual
 '

 test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'message for merging local tag signed by expired ssh key' '
 	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
 	git checkout main &&
 	git fetch . expired-signed &&
 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	grep "^Merge tag ${apos}expired-signed${apos}" actual &&
 	grep "^expired-signed" actual &&
 	! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
 '

 test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'message for merging local tag signed by not yet valid ssh key' '
 	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
 	git checkout main &&
 	git fetch . notyetvalid-signed &&
 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	grep "^Merge tag ${apos}notyetvalid-signed${apos}" actual &&
 	grep "^notyetvalid-signed" actual &&
 	! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
 '

 test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'message for merging local tag signed by valid timeboxed ssh key' '
 	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
 	git checkout main &&
 	git fetch . timeboxedvalid-signed &&
 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	grep "^Merge tag ${apos}timeboxedvalid-signed${apos}" actual &&
 	grep "^timeboxedvalid-signed" actual &&
 	grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
 	! grep "${GPGSSH_BAD_SIGNATURE}" actual
 '

 test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'message for merging local tag signed by invalid timeboxed ssh key' '
 	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
 	git checkout main &&
 	git fetch . timeboxedinvalid-signed &&
 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	grep "^Merge tag ${apos}timeboxedinvalid-signed${apos}" actual &&
 	grep "^timeboxedinvalid-signed" actual &&
 	! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
 '

 test_expect_success 'message for merging external branch' '
 	echo "Merge branch ${apos}left${apos} of $(pwd)" >expected &&

 	git checkout main &&
 	git fetch "$(pwd)" left &&

 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success '[merge] summary/log configuration' '
 	cat >expected <<-EOF &&
 	Merge branch ${apos}left${apos}

 	# By Another Author (3) and A U Thor (2)
 	# Via Another Committer
 	* left:
 	  Left #5
 	  Left #4
 	  Left #3
 	  Common #2
 	  Common #1
 	EOF

 	test_config merge.log true &&
 	test_unconfig merge.summary &&

 	git checkout main &&
 	test_tick &&
 	git fetch . left &&

 	git fmt-merge-msg <.git/FETCH_HEAD >actual1 &&

 	test_unconfig merge.log &&
 	test_config merge.summary true &&

 	git checkout main &&
 	test_tick &&
 	git fetch . left &&

 	git fmt-merge-msg <.git/FETCH_HEAD >actual2 &&

 	test_cmp expected actual1 &&
 	test_cmp expected actual2
 '

 test_expect_success 'setup FETCH_HEAD' '
 	git checkout main &&
 	test_tick &&
 	git fetch . left
 '

 test_expect_success 'merge.log=3 limits shortlog length' '
 	cat >expected <<-EOF &&
 	Merge branch ${apos}left${apos}

 	# By Another Author (3) and A U Thor (2)
 	# Via Another Committer
 	* left: (5 commits)
 	  Left #5
 	  Left #4
 	  Left #3
 	  ...
 	EOF

 	git -c merge.log=3 fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success 'merge.log=5 shows all 5 commits' '
 	cat >expected <<-EOF &&
 	Merge branch ${apos}left${apos}

 	# By Another Author (3) and A U Thor (2)
 	# Via Another Committer
 	* left:
 	  Left #5
 	  Left #4
 	  Left #3
 	  Common #2
 	  Common #1
 	EOF

 	git -c merge.log=5 fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success '--log=5 with custom comment character' '
 	cat >expected <<-EOF &&
 	Merge branch ${apos}left${apos}

 	x By Another Author (3) and A U Thor (2)
 	x Via Another Committer
 	* left:
 	  Left #5
 	  Left #4
 	  Left #3
 	  Common #2
 	  Common #1
 	EOF

 	git -c core.commentchar="x" fmt-merge-msg --log=5 <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success 'merge.log=0 disables shortlog' '
 	echo "Merge branch ${apos}left${apos}" >expected &&
 	git -c merge.log=0 fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success '--log=3 limits shortlog length' '
 	cat >expected <<-EOF &&
 	Merge branch ${apos}left${apos}

 	# By Another Author (3) and A U Thor (2)
 	# Via Another Committer
 	* left: (5 commits)
 	  Left #5
 	  Left #4
 	  Left #3
 	  ...
 	EOF

 	git fmt-merge-msg --log=3 <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success '--log=5 shows all 5 commits' '
 	cat >expected <<-EOF &&
 	Merge branch ${apos}left${apos}

 	# By Another Author (3) and A U Thor (2)
 	# Via Another Committer
 	* left:
 	  Left #5
 	  Left #4
 	  Left #3
 	  Common #2
 	  Common #1
 	EOF

 	git fmt-merge-msg --log=5 <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success '--no-log disables shortlog' '
 	echo "Merge branch ${apos}left${apos}" >expected &&
 	git fmt-merge-msg --no-log <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success '--log=0 disables shortlog' '
 	echo "Merge branch ${apos}left${apos}" >expected &&
 	git fmt-merge-msg --no-log <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success 'fmt-merge-msg -m' '
 	echo "Sync with left" >expected &&
 	cat >expected.log <<-EOF &&
 	Sync with left

 	# By Another Author (3) and A U Thor (2)
 	# Via Another Committer
 	* ${apos}left${apos} of $(pwd):
 	  Left #5
 	  Left #4
 	  Left #3
 	  Common #2
 	  Common #1
 	EOF

 	test_unconfig merge.log &&
 	test_unconfig merge.summary &&
 	git checkout main &&
 	git fetch "$(pwd)" left &&
 	git fmt-merge-msg -m "Sync with left" <.git/FETCH_HEAD >actual &&
 	git fmt-merge-msg --log -m "Sync with left" \
 					<.git/FETCH_HEAD >actual.log &&
 	test_config merge.log true &&
 	git fmt-merge-msg -m "Sync with left" \
 					<.git/FETCH_HEAD >actual.log-config &&
 	git fmt-merge-msg --no-log -m "Sync with left" \
 					<.git/FETCH_HEAD >actual.nolog &&

 	test_cmp expected actual &&
 	test_cmp expected.log actual.log &&
 	test_cmp expected.log actual.log-config &&
 	test_cmp expected actual.nolog
 '

 test_expect_success 'setup: expected shortlog for two branches' '
 	cat >expected <<-EOF
 	Merge branches ${apos}left${apos} and ${apos}right${apos}

 	# By Another Author (3) and A U Thor (2)
 	# Via Another Committer
 	* left:
 	  Left #5
 	  Left #4
 	  Left #3
 	  Common #2
 	  Common #1

 	* right:
 	  Right #5
 	  Right #4
 	  Right #3
 	  Common #2
 	  Common #1
 	EOF
 '

 test_expect_success 'shortlog for two branches' '
 	test_config merge.log true &&
 	test_unconfig merge.summary &&
 	git checkout main &&
 	test_tick &&
 	git fetch . left right &&
 	git fmt-merge-msg <.git/FETCH_HEAD >actual1 &&

 	test_unconfig merge.log &&
 	test_config merge.summary true &&
 	git checkout main &&
 	test_tick &&
 	git fetch . left right &&
 	git fmt-merge-msg <.git/FETCH_HEAD >actual2 &&

 	test_config merge.log yes &&
 	test_unconfig merge.summary &&
 	git checkout main &&
 	test_tick &&
 	git fetch . left right &&
 	git fmt-merge-msg <.git/FETCH_HEAD >actual3 &&

 	test_unconfig merge.log &&
 	test_config merge.summary yes &&
 	git checkout main &&
 	test_tick &&
 	git fetch . left right &&
 	git fmt-merge-msg <.git/FETCH_HEAD >actual4 &&

 	test_cmp expected actual1 &&
 	test_cmp expected actual2 &&
 	test_cmp expected actual3 &&
 	test_cmp expected actual4
 '

 test_expect_success 'merge-msg -F' '
 	test_unconfig merge.log &&
 	test_config merge.summary yes &&
 	git checkout main &&
 	test_tick &&
 	git fetch . left right &&
 	git fmt-merge-msg -F .git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success 'merge-msg -F in subdirectory' '
 	test_unconfig merge.log &&
 	test_config merge.summary yes &&
 	git checkout main &&
 	test_tick &&
 	git fetch . left right &&
 	mkdir sub &&
 	cp .git/FETCH_HEAD sub/FETCH_HEAD &&
 	(
 		cd sub &&
 		git fmt-merge-msg -F FETCH_HEAD >../actual
 	) &&
 	test_cmp expected actual
 '

 test_expect_success 'merge-msg with nothing to merge' '
 	test_unconfig merge.log &&
 	test_config merge.summary yes &&

 	(
 		cd remote &&
 		git checkout -b unrelated &&
 		test_tick &&
 		git fetch origin &&
 		git fmt-merge-msg <.git/FETCH_HEAD >../actual
 	) &&

 	test_must_be_empty actual
 '

 test_expect_success 'merge-msg tag' '
 	cat >expected <<-EOF &&
 	Merge tag ${apos}tag-r3${apos}

 	* tag ${apos}tag-r3${apos}:
 	  Right #3
 	  Common #2
 	  Common #1
 	EOF

 	test_unconfig merge.log &&
 	test_config merge.summary yes &&

 	git checkout main &&
 	test_tick &&
 	git fetch . tag tag-r3 &&

 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success 'merge-msg two tags' '
 	cat >expected <<-EOF &&
 	Merge tags ${apos}tag-r3${apos} and ${apos}tag-l5${apos}

 	* tag ${apos}tag-r3${apos}:
 	  Right #3
 	  Common #2
 	  Common #1

 	# By Another Author (3) and A U Thor (2)
 	# Via Another Committer
 	* tag ${apos}tag-l5${apos}:
 	  Left #5
 	  Left #4
 	  Left #3
 	  Common #2
 	  Common #1
 	EOF

 	test_unconfig merge.log &&
 	test_config merge.summary yes &&

 	git checkout main &&
 	test_tick &&
 	git fetch . tag tag-r3 tag tag-l5 &&

 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success 'merge-msg tag and branch' '
 	cat >expected <<-EOF &&
 	Merge branch ${apos}left${apos}, tag ${apos}tag-r3${apos}

 	* tag ${apos}tag-r3${apos}:
 	  Right #3
 	  Common #2
 	  Common #1

 	# By Another Author (3) and A U Thor (2)
 	# Via Another Committer
 	* left:
 	  Left #5
 	  Left #4
 	  Left #3
 	  Common #2
 	  Common #1
 	EOF

 	test_unconfig merge.log &&
 	test_config merge.summary yes &&

 	git checkout main &&
 	test_tick &&
 	git fetch . tag tag-r3 left &&

 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success 'merge-msg lots of commits' '
 	{
 		cat <<-EOF &&
 		Merge branch ${apos}long${apos}

 		* long: (35 commits)
 		EOF

 		i=29 &&
 		while test $i -gt 9
 		do
 			echo "  $i" &&
 			i=$(($i-1)) || return 1
 		done &&
 		echo "  ..."
 	} >expected &&

 	test_config merge.summary yes &&

 	git checkout main &&
 	test_tick &&
 	git fetch . long &&

 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	test_cmp expected actual
 '

 test_expect_success 'merge-msg with "merging" an annotated tag' '
 	test_config merge.log true &&

 	git checkout main^0 &&
 	git commit --allow-empty -m "One step ahead" &&
 	git tag -a -m "An annotated one" annote HEAD &&

 	git checkout main &&
 	git fetch . annote &&

 	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
 	{
 		cat <<-\EOF
 		Merge tag '\''annote'\''

 		An annotated one

 		* tag '\''annote'\'':
 		  One step ahead
 		EOF
 	} >expected &&
 	test_cmp expected actual &&

 	test_when_finished "git reset --hard" &&
 	annote=$(git rev-parse annote) &&
 	git merge --no-commit --no-ff $annote &&
 	{
 		cat <<-EOF
 		Merge tag '\''$annote'\''

 		An annotated one

 		* tag '\''$annote'\'':
 		  One step ahead
 		EOF
 	} >expected &&
 	test_cmp expected .git/MERGE_MSG
 '

 test_expect_success 'merge --into-name=<name>' '
 	test_when_finished "git checkout main" &&
 	git checkout -B side main &&
 	git commit --allow-empty -m "One step ahead" &&

 	git checkout --detach main &&
 	git merge --no-ff side &&
 	git show -s --format="%s" >full.0 &&
 	head -n1 full.0 >actual &&
 	# expect that HEAD is shown as-is
 	grep -e "Merge branch .side. into HEAD$" actual &&

 	git reset --hard main &&
 	git merge --no-ff --into-name=main side &&
 	git show -s --format="%s" >full.1 &&
 	head -n1 full.1 >actual &&
 	# expect that we pretend to be merging to main, that is suppressed
 	grep -e "Merge branch .side.$" actual &&

 	git checkout -b throwaway main &&
 	git merge --no-ff --into-name=main side &&
 	git show -s --format="%s" >full.2 &&
 	head -n1 full.2 >actual &&
 	# expect that we pretend to be merging to main, that is suppressed
 	grep -e "Merge branch .side.$" actual
 '

 test_expect_success 'merge.suppressDest configuration' '
 	test_when_finished "git checkout main" &&
 	git checkout -B side main &&
 	git commit --allow-empty -m "One step ahead" &&
 	git checkout main &&
 	git fetch . side &&

 	git -c merge.suppressDest="" fmt-merge-msg <.git/FETCH_HEAD >full.1 &&
 	head -n1 full.1 >actual &&
 	grep -e "Merge branch .side. into main" actual &&

 	git -c merge.suppressDest="mast" fmt-merge-msg <.git/FETCH_HEAD >full.2 &&
 	head -n1 full.2 >actual &&
 	grep -e "Merge branch .side. into main$" actual &&

 	git -c merge.suppressDest="ma?*[rn]" fmt-merge-msg <.git/FETCH_HEAD >full.3 &&
 	head -n1 full.3 >actual &&
 	grep -e "Merge branch .side." actual &&
 	! grep -e " into main$" actual &&

 	git checkout --detach HEAD &&
 	git -c merge.suppressDest="main" fmt-merge-msg <.git/FETCH_HEAD >full.4 &&
 	head -n1 full.4 >actual &&
 	grep -e "Merge branch .side. into HEAD$" actual &&

 	git -c merge.suppressDest="main" fmt-merge-msg \
 		--into-name=main <.git/FETCH_HEAD >full.5 &&
 	head -n1 full.5 >actual &&
 	grep -e "Merge branch .side." actual &&
 	! grep -e " into main$" actual &&
 	! grep -e " into HEAD$" actual
 '

 test_done
	#!/bin/sh
	#
	# Copyright (c) 2006, Junio C Hamano
	#

	test_description='fmt-merge-msg test'

	GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
	export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

	. ./test-lib.sh
	. "$TEST_DIRECTORY/lib-gpg.sh"

	test_expect_success setup '
	echo one >one &&
	git add one &&
	test_tick &&
	git commit -m "Initial" &&

	git clone . remote &&

	echo uno >one &&
	echo dos >two &&
	git add two &&
	test_tick &&
	git commit -a -m "Second" &&

	git checkout -b left &&

	echo "c1" >one &&
	test_tick &&
	git commit -a -m "Common #1" &&

	echo "c2" >one &&
	test_tick &&
	git commit -a -m "Common #2" &&

	git branch right &&

	echo "l3" >two &&
	test_tick &&
	GIT_COMMITTER_NAME="Another Committer" \
	GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #3" &&

	echo "l4" >two &&
	test_tick &&
	GIT_COMMITTER_NAME="Another Committer" \
	GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #4" &&

	echo "l5" >two &&
	test_tick &&
	GIT_COMMITTER_NAME="Another Committer" \
	GIT_AUTHOR_NAME="Another Author" git commit -a -m "Left #5" &&
	git tag tag-l5 &&

	git checkout right &&

	echo "r3" >three &&
	git add three &&
	test_tick &&
	git commit -a -m "Right #3" &&
	git tag tag-r3 &&

	echo "r4" >three &&
	test_tick &&
	git commit -a -m "Right #4" &&

	echo "r5" >three &&
	test_tick &&
	git commit -a -m "Right #5" &&

	git checkout -b long &&
	test_commit_bulk --start=0 --message=%s --filename=one 30 &&

	git show-branch &&

	apos="'\''"
	'

	test_expect_success GPG 'set up a signed tag' '
	git tag -s -m signed-tag-msg signed-good-tag left
	'

	test_expect_success GPGSSH 'created ssh signed commit and tag' '
	test_config gpg.format ssh &&
	git checkout -b signed-ssh &&
	touch file &&
	git add file &&
	git commit -m "ssh signed" -S"${GPGSSH_KEY_PRIMARY}" &&
	git tag -s -u"${GPGSSH_KEY_PRIMARY}" -m signed-ssh-tag-msg signed-good-ssh-tag left &&
	git tag -s -u"${GPGSSH_KEY_UNTRUSTED}" -m signed-ssh-tag-msg-untrusted signed-untrusted-ssh-tag left
	'

	test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'create signed tags with keys having defined lifetimes' '
	test_when_finished "test_unconfig commit.gpgsign" &&
	test_config gpg.format ssh &&
	git checkout -b signed-expiry-ssh &&
	touch file &&
	git add file &&

	echo expired >file && test_tick && git commit -a -m expired -S"${GPGSSH_KEY_EXPIRED}" &&
	git tag -s -u "${GPGSSH_KEY_EXPIRED}" -m expired-signed expired-signed &&

	echo notyetvalid >file && test_tick && git commit -a -m notyetvalid -S"${GPGSSH_KEY_NOTYETVALID}" &&
	git tag -s -u "${GPGSSH_KEY_NOTYETVALID}" -m notyetvalid-signed notyetvalid-signed &&

	echo timeboxedvalid >file && test_tick && git commit -a -m timeboxedvalid -S"${GPGSSH_KEY_TIMEBOXEDVALID}" &&
	git tag -s -u "${GPGSSH_KEY_TIMEBOXEDVALID}" -m timeboxedvalid-signed timeboxedvalid-signed &&

	echo timeboxedinvalid >file && test_tick && git commit -a -m timeboxedinvalid -S"${GPGSSH_KEY_TIMEBOXEDINVALID}" &&
	git tag -s -u "${GPGSSH_KEY_TIMEBOXEDINVALID}" -m timeboxedinvalid-signed timeboxedinvalid-signed
	'

	test_expect_success 'message for merging local branch' '
	echo "Merge branch ${apos}left${apos}" >expected &&

	git checkout main &&
	git fetch . left &&

	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success GPG 'message for merging local tag signed by good key' '
	git checkout main &&
	git fetch . signed-good-tag &&
	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	grep "^Merge tag ${apos}signed-good-tag${apos}" actual &&
	grep "^signed-tag-msg" actual &&
	grep "^# gpg: Signature made" actual &&
	grep "^# gpg: Good signature from" actual
	'

	test_expect_success GPG 'message for merging local tag signed by unknown key' '
	git checkout main &&
	git fetch . signed-good-tag &&
	GNUPGHOME=. git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	grep "^Merge tag ${apos}signed-good-tag${apos}" actual &&
	grep "^signed-tag-msg" actual &&
	grep "^# gpg: Signature made" actual &&
	grep -E "^# gpg: Can${apos}t check signature: (public key not found\|No public key)" actual
	'

	test_expect_success GPGSSH 'message for merging local tag signed by good ssh key' '
	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
	git checkout main &&
	git fetch . signed-good-ssh-tag &&
	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	grep "^Merge tag ${apos}signed-good-ssh-tag${apos}" actual &&
	grep "^signed-ssh-tag-msg" actual &&
	grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
	! grep "${GPGSSH_BAD_SIGNATURE}" actual
	'

	test_expect_success GPGSSH 'message for merging local tag signed by unknown ssh key' '
	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
	git checkout main &&
	git fetch . signed-untrusted-ssh-tag &&
	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	grep "^Merge tag ${apos}signed-untrusted-ssh-tag${apos}" actual &&
	grep "^signed-ssh-tag-msg-untrusted" actual &&
	grep "${GPGSSH_GOOD_SIGNATURE_UNTRUSTED}" actual &&
	! grep "${GPGSSH_BAD_SIGNATURE}" actual &&
	grep "${GPGSSH_KEY_NOT_TRUSTED}" actual
	'

	test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'message for merging local tag signed by expired ssh key' '
	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
	git checkout main &&
	git fetch . expired-signed &&
	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	grep "^Merge tag ${apos}expired-signed${apos}" actual &&
	grep "^expired-signed" actual &&
	! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
	'

	test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'message for merging local tag signed by not yet valid ssh key' '
	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
	git checkout main &&
	git fetch . notyetvalid-signed &&
	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	grep "^Merge tag ${apos}notyetvalid-signed${apos}" actual &&
	grep "^notyetvalid-signed" actual &&
	! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
	'

	test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'message for merging local tag signed by valid timeboxed ssh key' '
	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
	git checkout main &&
	git fetch . timeboxedvalid-signed &&
	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	grep "^Merge tag ${apos}timeboxedvalid-signed${apos}" actual &&
	grep "^timeboxedvalid-signed" actual &&
	grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual &&
	! grep "${GPGSSH_BAD_SIGNATURE}" actual
	'

	test_expect_success GPGSSH,GPGSSH_VERIFYTIME 'message for merging local tag signed by invalid timeboxed ssh key' '
	test_config gpg.ssh.allowedSignersFile "${GPGSSH_ALLOWED_SIGNERS}" &&
	git checkout main &&
	git fetch . timeboxedinvalid-signed &&
	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	grep "^Merge tag ${apos}timeboxedinvalid-signed${apos}" actual &&
	grep "^timeboxedinvalid-signed" actual &&
	! grep "${GPGSSH_GOOD_SIGNATURE_TRUSTED}" actual
	'

	test_expect_success 'message for merging external branch' '
	echo "Merge branch ${apos}left${apos} of $(pwd)" >expected &&

	git checkout main &&
	git fetch "$(pwd)" left &&

	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success '[merge] summary/log configuration' '
	cat >expected <<-EOF &&
	Merge branch ${apos}left${apos}

	# By Another Author (3) and A U Thor (2)
	# Via Another Committer
	* left:
	Left #5
	Left #4
	Left #3
	Common #2
	Common #1
	EOF

	test_config merge.log true &&
	test_unconfig merge.summary &&

	git checkout main &&
	test_tick &&
	git fetch . left &&

	git fmt-merge-msg <.git/FETCH_HEAD >actual1 &&

	test_unconfig merge.log &&
	test_config merge.summary true &&

	git checkout main &&
	test_tick &&
	git fetch . left &&

	git fmt-merge-msg <.git/FETCH_HEAD >actual2 &&

	test_cmp expected actual1 &&
	test_cmp expected actual2
	'

	test_expect_success 'setup FETCH_HEAD' '
	git checkout main &&
	test_tick &&
	git fetch . left
	'

	test_expect_success 'merge.log=3 limits shortlog length' '
	cat >expected <<-EOF &&
	Merge branch ${apos}left${apos}

	# By Another Author (3) and A U Thor (2)
	# Via Another Committer
	* left: (5 commits)
	Left #5
	Left #4
	Left #3
	...
	EOF

	git -c merge.log=3 fmt-merge-msg <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success 'merge.log=5 shows all 5 commits' '
	cat >expected <<-EOF &&
	Merge branch ${apos}left${apos}

	# By Another Author (3) and A U Thor (2)
	# Via Another Committer
	* left:
	Left #5
	Left #4
	Left #3
	Common #2
	Common #1
	EOF

	git -c merge.log=5 fmt-merge-msg <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success '--log=5 with custom comment character' '
	cat >expected <<-EOF &&
	Merge branch ${apos}left${apos}

	x By Another Author (3) and A U Thor (2)
	x Via Another Committer
	* left:
	Left #5
	Left #4
	Left #3
	Common #2
	Common #1
	EOF

	git -c core.commentchar="x" fmt-merge-msg --log=5 <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success 'merge.log=0 disables shortlog' '
	echo "Merge branch ${apos}left${apos}" >expected &&
	git -c merge.log=0 fmt-merge-msg <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success '--log=3 limits shortlog length' '
	cat >expected <<-EOF &&
	Merge branch ${apos}left${apos}

	# By Another Author (3) and A U Thor (2)
	# Via Another Committer
	* left: (5 commits)
	Left #5
	Left #4
	Left #3
	...
	EOF

	git fmt-merge-msg --log=3 <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success '--log=5 shows all 5 commits' '
	cat >expected <<-EOF &&
	Merge branch ${apos}left${apos}

	# By Another Author (3) and A U Thor (2)
	# Via Another Committer
	* left:
	Left #5
	Left #4
	Left #3
	Common #2
	Common #1
	EOF

	git fmt-merge-msg --log=5 <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success '--no-log disables shortlog' '
	echo "Merge branch ${apos}left${apos}" >expected &&
	git fmt-merge-msg --no-log <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success '--log=0 disables shortlog' '
	echo "Merge branch ${apos}left${apos}" >expected &&
	git fmt-merge-msg --no-log <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success 'fmt-merge-msg -m' '
	echo "Sync with left" >expected &&
	cat >expected.log <<-EOF &&
	Sync with left

	# By Another Author (3) and A U Thor (2)
	# Via Another Committer
	* ${apos}left${apos} of $(pwd):
	Left #5
	Left #4
	Left #3
	Common #2
	Common #1
	EOF

	test_unconfig merge.log &&
	test_unconfig merge.summary &&
	git checkout main &&
	git fetch "$(pwd)" left &&
	git fmt-merge-msg -m "Sync with left" <.git/FETCH_HEAD >actual &&
	git fmt-merge-msg --log -m "Sync with left" \
	<.git/FETCH_HEAD >actual.log &&
	test_config merge.log true &&
	git fmt-merge-msg -m "Sync with left" \
	<.git/FETCH_HEAD >actual.log-config &&
	git fmt-merge-msg --no-log -m "Sync with left" \
	<.git/FETCH_HEAD >actual.nolog &&

	test_cmp expected actual &&
	test_cmp expected.log actual.log &&
	test_cmp expected.log actual.log-config &&
	test_cmp expected actual.nolog
	'

	test_expect_success 'setup: expected shortlog for two branches' '
	cat >expected <<-EOF
	Merge branches ${apos}left${apos} and ${apos}right${apos}

	# By Another Author (3) and A U Thor (2)
	# Via Another Committer
	* left:
	Left #5
	Left #4
	Left #3
	Common #2
	Common #1

	* right:
	Right #5
	Right #4
	Right #3
	Common #2
	Common #1
	EOF
	'

	test_expect_success 'shortlog for two branches' '
	test_config merge.log true &&
	test_unconfig merge.summary &&
	git checkout main &&
	test_tick &&
	git fetch . left right &&
	git fmt-merge-msg <.git/FETCH_HEAD >actual1 &&

	test_unconfig merge.log &&
	test_config merge.summary true &&
	git checkout main &&
	test_tick &&
	git fetch . left right &&
	git fmt-merge-msg <.git/FETCH_HEAD >actual2 &&

	test_config merge.log yes &&
	test_unconfig merge.summary &&
	git checkout main &&
	test_tick &&
	git fetch . left right &&
	git fmt-merge-msg <.git/FETCH_HEAD >actual3 &&

	test_unconfig merge.log &&
	test_config merge.summary yes &&
	git checkout main &&
	test_tick &&
	git fetch . left right &&
	git fmt-merge-msg <.git/FETCH_HEAD >actual4 &&

	test_cmp expected actual1 &&
	test_cmp expected actual2 &&
	test_cmp expected actual3 &&
	test_cmp expected actual4
	'

	test_expect_success 'merge-msg -F' '
	test_unconfig merge.log &&
	test_config merge.summary yes &&
	git checkout main &&
	test_tick &&
	git fetch . left right &&
	git fmt-merge-msg -F .git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success 'merge-msg -F in subdirectory' '
	test_unconfig merge.log &&
	test_config merge.summary yes &&
	git checkout main &&
	test_tick &&
	git fetch . left right &&
	mkdir sub &&
	cp .git/FETCH_HEAD sub/FETCH_HEAD &&
	(
	cd sub &&
	git fmt-merge-msg -F FETCH_HEAD >../actual
	) &&
	test_cmp expected actual
	'

	test_expect_success 'merge-msg with nothing to merge' '
	test_unconfig merge.log &&
	test_config merge.summary yes &&

	(
	cd remote &&
	git checkout -b unrelated &&
	test_tick &&
	git fetch origin &&
	git fmt-merge-msg <.git/FETCH_HEAD >../actual
	) &&

	test_must_be_empty actual
	'

	test_expect_success 'merge-msg tag' '
	cat >expected <<-EOF &&
	Merge tag ${apos}tag-r3${apos}

	* tag ${apos}tag-r3${apos}:
	Right #3
	Common #2
	Common #1
	EOF

	test_unconfig merge.log &&
	test_config merge.summary yes &&

	git checkout main &&
	test_tick &&
	git fetch . tag tag-r3 &&

	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success 'merge-msg two tags' '
	cat >expected <<-EOF &&
	Merge tags ${apos}tag-r3${apos} and ${apos}tag-l5${apos}

	* tag ${apos}tag-r3${apos}:
	Right #3
	Common #2
	Common #1

	# By Another Author (3) and A U Thor (2)
	# Via Another Committer
	* tag ${apos}tag-l5${apos}:
	Left #5
	Left #4
	Left #3
	Common #2
	Common #1
	EOF

	test_unconfig merge.log &&
	test_config merge.summary yes &&

	git checkout main &&
	test_tick &&
	git fetch . tag tag-r3 tag tag-l5 &&

	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success 'merge-msg tag and branch' '
	cat >expected <<-EOF &&
	Merge branch ${apos}left${apos}, tag ${apos}tag-r3${apos}

	* tag ${apos}tag-r3${apos}:
	Right #3
	Common #2
	Common #1

	# By Another Author (3) and A U Thor (2)
	# Via Another Committer
	* left:
	Left #5
	Left #4
	Left #3
	Common #2
	Common #1
	EOF

	test_unconfig merge.log &&
	test_config merge.summary yes &&

	git checkout main &&
	test_tick &&
	git fetch . tag tag-r3 left &&

	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success 'merge-msg lots of commits' '
	{
	cat <<-EOF &&
	Merge branch ${apos}long${apos}

	* long: (35 commits)
	EOF

	i=29 &&
	while test $i -gt 9
	do
	echo " $i" &&
	i=$(($i-1)) \|\| return 1
	done &&
	echo " ..."
	} >expected &&

	test_config merge.summary yes &&

	git checkout main &&
	test_tick &&
	git fetch . long &&

	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	test_cmp expected actual
	'

	test_expect_success 'merge-msg with "merging" an annotated tag' '
	test_config merge.log true &&

	git checkout main^0 &&
	git commit --allow-empty -m "One step ahead" &&
	git tag -a -m "An annotated one" annote HEAD &&

	git checkout main &&
	git fetch . annote &&

	git fmt-merge-msg <.git/FETCH_HEAD >actual &&
	{
	cat <<-\EOF
	Merge tag '\''annote'\''

	An annotated one

	* tag '\''annote'\'':
	One step ahead
	EOF
	} >expected &&
	test_cmp expected actual &&

	test_when_finished "git reset --hard" &&
	annote=$(git rev-parse annote) &&
	git merge --no-commit --no-ff $annote &&
	{
	cat <<-EOF
	Merge tag '\''$annote'\''

	An annotated one

	* tag '\''$annote'\'':
	One step ahead
	EOF
	} >expected &&
	test_cmp expected .git/MERGE_MSG
	'

	test_expect_success 'merge --into-name=<name>' '
	test_when_finished "git checkout main" &&
	git checkout -B side main &&
	git commit --allow-empty -m "One step ahead" &&

	git checkout --detach main &&
	git merge --no-ff side &&
	git show -s --format="%s" >full.0 &&
	head -n1 full.0 >actual &&
	# expect that HEAD is shown as-is
	grep -e "Merge branch .side. into HEAD$" actual &&

	git reset --hard main &&
	git merge --no-ff --into-name=main side &&
	git show -s --format="%s" >full.1 &&
	head -n1 full.1 >actual &&
	# expect that we pretend to be merging to main, that is suppressed
	grep -e "Merge branch .side.$" actual &&

	git checkout -b throwaway main &&
	git merge --no-ff --into-name=main side &&
	git show -s --format="%s" >full.2 &&
	head -n1 full.2 >actual &&
	# expect that we pretend to be merging to main, that is suppressed
	grep -e "Merge branch .side.$" actual
	'

	test_expect_success 'merge.suppressDest configuration' '
	test_when_finished "git checkout main" &&
	git checkout -B side main &&
	git commit --allow-empty -m "One step ahead" &&
	git checkout main &&
	git fetch . side &&

	git -c merge.suppressDest="" fmt-merge-msg <.git/FETCH_HEAD >full.1 &&
	head -n1 full.1 >actual &&
	grep -e "Merge branch .side. into main" actual &&

	git -c merge.suppressDest="mast" fmt-merge-msg <.git/FETCH_HEAD >full.2 &&
	head -n1 full.2 >actual &&
	grep -e "Merge branch .side. into main$" actual &&

	git -c merge.suppressDest="ma?*[rn]" fmt-merge-msg <.git/FETCH_HEAD >full.3 &&
	head -n1 full.3 >actual &&
	grep -e "Merge branch .side." actual &&
	! grep -e " into main$" actual &&

	git checkout --detach HEAD &&
	git -c merge.suppressDest="main" fmt-merge-msg <.git/FETCH_HEAD >full.4 &&
	head -n1 full.4 >actual &&
	grep -e "Merge branch .side. into HEAD$" actual &&

	git -c merge.suppressDest="main" fmt-merge-msg \
	--into-name=main <.git/FETCH_HEAD >full.5 &&
	head -n1 full.5 >actual &&
	grep -e "Merge branch .side." actual &&
	! grep -e " into main$" actual &&
	! grep -e " into HEAD$" actual
	'

	test_done