From c8bae7493d2f2910b57f13ded012e86bdcfb0532 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 16:47:53 +0200
Subject: Adding upstream version 1:2.39.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 contrib/subtree/t/t7900-subtree.sh | 1526 ++++++++++++++++++++++++++++++++++++
 1 file changed, 1526 insertions(+)
 create mode 100755 contrib/subtree/t/t7900-subtree.sh

(limited to 'contrib/subtree/t/t7900-subtree.sh')

diff --git a/contrib/subtree/t/t7900-subtree.sh b/contrib/subtree/t/t7900-subtree.sh
new file mode 100755
index 0000000..341c169
--- /dev/null
+++ b/contrib/subtree/t/t7900-subtree.sh
@@ -0,0 +1,1526 @@
+#!/bin/sh
+#
+# Copyright (c) 2012 Avery Pennaraum
+# Copyright (c) 2015 Alexey Shumkin
+#
+test_description='Basic porcelain support for subtrees
+
+This test verifies the basic operation of the add, merge, split, pull,
+and push subcommands of git subtree.
+'
+
+TEST_DIRECTORY=$(pwd)/../../../t
+. "$TEST_DIRECTORY"/test-lib.sh
+
+# Use our own wrapper around test-lib.sh's test_create_repo, in order
+# to set log.date=relative.  `git subtree` parses the output of `git
+# log`, and so it must be careful to not be affected by settings that
+# change the `git log` output.  We test this by setting
+# log.date=relative for every repo in the tests.
+subtree_test_create_repo () {
+	test_create_repo "$1" &&
+	git -C "$1" config log.date relative
+}
+
+test_create_commit () (
+	repo=$1 &&
+	commit=$2 &&
+	cd "$repo" &&
+	mkdir -p "$(dirname "$commit")" \
+	|| error "Could not create directory for commit"
+	echo "$commit" >"$commit" &&
+	git add "$commit" || error "Could not add commit"
+	git commit -m "$commit" || error "Could not commit"
+)
+
+test_wrong_flag() {
+	test_must_fail "$@" >out 2>err &&
+	test_must_be_empty out &&
+	grep "flag does not make sense with" err
+}
+
+last_commit_subject () {
+	git log --pretty=format:%s -1
+}
+
+# Upon 'git subtree add|merge --squash' of an annotated tag,
+# pre-2.32.0 versions of 'git subtree' would write the hash of the tag
+# (sub1 below), instead of the commit (sub1^{commit}) in the
+# "git-subtree-split" trailer.
+# We immitate this behaviour below using a replace ref.
+# This function creates 3 repositories:
+# - $1
+# - $1-sub (added as subtree "sub" in $1)
+# - $1-clone (clone of $1)
+test_create_pre2_32_repo () {
+	subtree_test_create_repo "$1" &&
+	subtree_test_create_repo "$1-sub" &&
+	test_commit -C "$1" main1 &&
+	test_commit -C "$1-sub" --annotate sub1 &&
+	git -C "$1" subtree add --prefix="sub" --squash "../$1-sub" sub1 &&
+	tag=$(git -C "$1" rev-parse FETCH_HEAD) &&
+	commit=$(git -C "$1" rev-parse FETCH_HEAD^{commit}) &&
+	git -C "$1" log -1 --format=%B HEAD^2 >msg &&
+	test_commit -C "$1-sub" --annotate sub2 &&
+	git clone --no-local "$1" "$1-clone" &&
+	new_commit=$(cat msg | sed -e "s/$commit/$tag/" | git -C "$1-clone" commit-tree HEAD^2^{tree}) &&
+	git -C "$1-clone" replace HEAD^2 $new_commit
+}
+
+test_expect_success 'shows short help text for -h' '
+	test_expect_code 129 git subtree -h >out 2>err &&
+	test_must_be_empty err &&
+	grep -e "^ *or: git subtree pull" out &&
+	grep -e --annotate out
+'
+
+#
+# Tests for 'git subtree add'
+#
+
+test_expect_success 'no merge from non-existent subtree' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		test_must_fail git subtree merge --prefix="sub dir" FETCH_HEAD
+	)
+'
+
+test_expect_success 'no pull from non-existent subtree' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		test_must_fail git subtree pull --prefix="sub dir" ./"sub proj" HEAD
+	)
+'
+
+test_expect_success 'add rejects flags for split' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		test_wrong_flag git subtree add --prefix="sub dir" --annotate=foo FETCH_HEAD &&
+		test_wrong_flag git subtree add --prefix="sub dir" --branch=foo FETCH_HEAD &&
+		test_wrong_flag git subtree add --prefix="sub dir" --ignore-joins FETCH_HEAD &&
+		test_wrong_flag git subtree add --prefix="sub dir" --onto=foo FETCH_HEAD &&
+		test_wrong_flag git subtree add --prefix="sub dir" --rejoin FETCH_HEAD
+	)
+'
+
+test_expect_success 'add subproj as subtree into sub dir/ with --prefix' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD &&
+		test "$(last_commit_subject)" = "Add '\''sub dir/'\'' from commit '\''$(git rev-parse FETCH_HEAD)'\''"
+	)
+'
+
+test_expect_success 'add subproj as subtree into sub dir/ with --prefix and --message' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" --message="Added subproject" FETCH_HEAD &&
+		test "$(last_commit_subject)" = "Added subproject"
+	)
+'
+
+test_expect_success 'add subproj as subtree into sub dir/ with --prefix as -P and --message as -m' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add -P "sub dir" -m "Added subproject" FETCH_HEAD &&
+		test "$(last_commit_subject)" = "Added subproject"
+	)
+'
+
+test_expect_success 'add subproj as subtree into sub dir/ with --squash and --prefix and --message' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" --message="Added subproject with squash" --squash FETCH_HEAD &&
+		test "$(last_commit_subject)" = "Added subproject with squash"
+	)
+'
+
+#
+# Tests for 'git subtree merge'
+#
+
+test_expect_success 'merge rejects flags for split' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		test_wrong_flag git subtree merge --prefix="sub dir" --annotate=foo FETCH_HEAD &&
+		test_wrong_flag git subtree merge --prefix="sub dir" --branch=foo FETCH_HEAD &&
+		test_wrong_flag git subtree merge --prefix="sub dir" --ignore-joins FETCH_HEAD &&
+		test_wrong_flag git subtree merge --prefix="sub dir" --onto=foo FETCH_HEAD &&
+		test_wrong_flag git subtree merge --prefix="sub dir" --rejoin FETCH_HEAD
+	)
+'
+
+test_expect_success 'merge new subproj history into sub dir/ with --prefix' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		test "$(last_commit_subject)" = "Merge commit '\''$(git rev-parse FETCH_HEAD)'\''"
+	)
+'
+
+test_expect_success 'merge new subproj history into sub dir/ with --prefix and --message' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" --message="Merged changes from subproject" FETCH_HEAD &&
+		test "$(last_commit_subject)" = "Merged changes from subproject"
+	)
+'
+
+test_expect_success 'merge new subproj history into sub dir/ with --squash and --prefix and --message' '
+	subtree_test_create_repo "$test_count/sub proj" &&
+	subtree_test_create_repo "$test_count" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" --message="Merged changes from subproject using squash" --squash FETCH_HEAD &&
+		test "$(last_commit_subject)" = "Merged changes from subproject using squash"
+	)
+'
+
+test_expect_success 'merge the added subproj again, should do nothing' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD &&
+		# this shouldn not actually do anything, since FETCH_HEAD
+		# is already a parent
+		result=$(git merge -s ours -m "merge -s -ours" FETCH_HEAD) &&
+		test "${result}" = "Already up to date."
+	)
+'
+
+test_expect_success 'merge new subproj history into subdir/ with a slash appended to the argument of --prefix' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/subproj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/subproj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./subproj HEAD &&
+		git subtree add --prefix=subdir/ FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/subproj" sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./subproj HEAD &&
+		git subtree merge --prefix=subdir/ FETCH_HEAD &&
+		test "$(last_commit_subject)" = "Merge commit '\''$(git rev-parse FETCH_HEAD)'\''"
+	)
+'
+
+test_expect_success 'merge with --squash after annotated tag was added/merged with --squash pre-v2.32.0 ' '
+	test_create_pre2_32_repo "$test_count" &&
+	git -C "$test_count-clone" fetch "../$test_count-sub" sub2  &&
+	test_must_fail git -C "$test_count-clone" subtree merge --prefix="sub" --squash FETCH_HEAD &&
+	git -C "$test_count-clone" subtree merge --prefix="sub" --squash FETCH_HEAD  "../$test_count-sub"
+'
+
+#
+# Tests for 'git subtree split'
+#
+
+test_expect_success 'split requires option --prefix' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD &&
+		echo "fatal: you must provide the --prefix option." >expected &&
+		test_must_fail git subtree split >actual 2>&1 &&
+		test_debug "printf '"expected: "'" &&
+		test_debug "cat expected" &&
+		test_debug "printf '"actual: "'" &&
+		test_debug "cat actual" &&
+		test_cmp expected actual
+	)
+'
+
+test_expect_success 'split requires path given by option --prefix must exist' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD &&
+		echo "fatal: '\''non-existent-directory'\'' does not exist; use '\''git subtree add'\''" >expected &&
+		test_must_fail git subtree split --prefix=non-existent-directory >actual 2>&1 &&
+		test_debug "printf '"expected: "'" &&
+		test_debug "cat expected" &&
+		test_debug "printf '"actual: "'" &&
+		test_debug "cat actual" &&
+		test_cmp expected actual
+	)
+'
+
+test_expect_success 'split rejects flags for add' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		test_wrong_flag git subtree split --prefix="sub dir" --squash &&
+		test_wrong_flag git subtree split --prefix="sub dir" --message=foo
+	)
+'
+
+test_expect_success 'split sub dir/ with --rejoin' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree split --prefix="sub dir" --annotate="*" --rejoin &&
+		test "$(last_commit_subject)" = "Split '\''sub dir/'\'' into commit '\''$split_hash'\''"
+	)
+'
+
+test_expect_success 'split sub dir/ with --rejoin from scratch' '
+	subtree_test_create_repo "$test_count" &&
+	test_create_commit "$test_count" main1 &&
+	(
+		cd "$test_count" &&
+		mkdir "sub dir" &&
+		echo file >"sub dir"/file &&
+		git add "sub dir/file" &&
+		git commit -m"sub dir file" &&
+		split_hash=$(git subtree split --prefix="sub dir" --rejoin) &&
+		git subtree split --prefix="sub dir" --rejoin &&
+		test "$(last_commit_subject)" = "Split '\''sub dir/'\'' into commit '\''$split_hash'\''"
+	)
+'
+
+test_expect_success 'split sub dir/ with --rejoin and --message' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		git subtree split --prefix="sub dir" --message="Split & rejoin" --annotate="*" --rejoin &&
+		test "$(last_commit_subject)" = "Split & rejoin"
+	)
+'
+
+test_expect_success 'split "sub dir"/ with --rejoin and --squash' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" --squash FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git subtree pull --prefix="sub dir" --squash ./"sub proj" HEAD &&
+		MAIN=$(git rev-parse --verify HEAD) &&
+		SUB=$(git -C "sub proj" rev-parse --verify HEAD) &&
+
+		SPLIT=$(git subtree split --prefix="sub dir" --annotate="*" --rejoin --squash) &&
+
+		test_must_fail git merge-base --is-ancestor $SUB HEAD &&
+		test_must_fail git merge-base --is-ancestor $SPLIT HEAD &&
+		git rev-list HEAD ^$MAIN >commit-list &&
+		test_line_count = 2 commit-list &&
+		test "$(git rev-parse --verify HEAD:)"           = "$(git rev-parse --verify $MAIN:)" &&
+		test "$(git rev-parse --verify HEAD:"sub dir")"  = "$(git rev-parse --verify $SPLIT:)" &&
+		test "$(git rev-parse --verify HEAD^1)"          = $MAIN &&
+		test "$(git rev-parse --verify HEAD^2)"         != $SPLIT &&
+		test "$(git rev-parse --verify HEAD^2:)"         = "$(git rev-parse --verify $SPLIT:)" &&
+		test "$(last_commit_subject)" = "Split '\''sub dir/'\'' into commit '\''$SPLIT'\''"
+	)
+'
+
+test_expect_success 'split then pull "sub dir"/ with --rejoin and --squash' '
+	# 1. "add"
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	git -C "$test_count" subtree --prefix="sub dir" add --squash ./"sub proj" HEAD &&
+
+	# 2. commit from parent
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+
+	# 3. "split --rejoin --squash"
+	git -C "$test_count" subtree --prefix="sub dir" split --rejoin --squash &&
+
+	# 4. "pull --squash"
+	test_create_commit "$test_count/sub proj" sub2 &&
+	git -C "$test_count" subtree -d --prefix="sub dir" pull --squash ./"sub proj" HEAD &&
+
+	test_must_fail git merge-base HEAD FETCH_HEAD
+'
+
+test_expect_success 'split "sub dir"/ with --branch' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br &&
+		test "$(git rev-parse subproj-br)" = "$split_hash"
+	)
+'
+
+test_expect_success 'check hash of split' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br &&
+		test "$(git rev-parse subproj-br)" = "$split_hash" &&
+		# Check hash of split
+		new_hash=$(git rev-parse subproj-br^2) &&
+		(
+			cd ./"sub proj" &&
+			subdir_hash=$(git rev-parse HEAD) &&
+			test "$new_hash" = "$subdir_hash"
+		)
+	)
+'
+
+test_expect_success 'split "sub dir"/ with --branch for an existing branch' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git branch subproj-br FETCH_HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br &&
+		test "$(git rev-parse subproj-br)" = "$split_hash"
+	)
+'
+
+test_expect_success 'split "sub dir"/ with --branch for an incompatible branch' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git branch init HEAD &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		test_must_fail git subtree split --prefix="sub dir" --branch init
+	)
+'
+
+test_expect_success 'split after annotated tag was added/merged with --squash pre-v2.32.0' '
+	test_create_pre2_32_repo "$test_count" &&
+	test_must_fail git -C "$test_count-clone" subtree split --prefix="sub" HEAD &&
+	git -C "$test_count-clone" subtree split --prefix="sub" HEAD "../$test_count-sub"
+'
+
+#
+# Tests for 'git subtree pull'
+#
+
+test_expect_success 'pull requires option --prefix' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	(
+		cd "$test_count" &&
+		test_must_fail git subtree pull ./"sub proj" HEAD >out 2>err &&
+
+		echo "fatal: you must provide the --prefix option." >expected &&
+		test_must_be_empty out &&
+		test_cmp expected err
+	)
+'
+
+test_expect_success 'pull requires path given by option --prefix must exist' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		test_must_fail git subtree pull --prefix="sub dir" ./"sub proj" HEAD >out 2>err &&
+
+		echo "fatal: '\''sub dir'\'' does not exist; use '\''git subtree add'\''" >expected &&
+		test_must_be_empty out &&
+		test_cmp expected err
+	)
+'
+
+test_expect_success 'pull basic operation' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	(
+		cd "$test_count" &&
+		exp=$(git -C "sub proj" rev-parse --verify HEAD:) &&
+		git subtree pull --prefix="sub dir" ./"sub proj" HEAD &&
+		act=$(git rev-parse --verify HEAD:"sub dir") &&
+		test "$act" = "$exp"
+	)
+'
+
+test_expect_success 'pull rejects flags for split' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	(
+		test_must_fail git subtree pull --prefix="sub dir" --annotate=foo ./"sub proj" HEAD &&
+		test_must_fail git subtree pull --prefix="sub dir" --branch=foo ./"sub proj" HEAD &&
+		test_must_fail git subtree pull --prefix="sub dir" --ignore-joins ./"sub proj" HEAD &&
+		test_must_fail git subtree pull --prefix="sub dir" --onto=foo ./"sub proj" HEAD &&
+		test_must_fail git subtree pull --prefix="sub dir" --rejoin ./"sub proj" HEAD
+	)
+'
+
+test_expect_success 'pull with --squash after annotated tag was added/merged with --squash pre-v2.32.0 ' '
+	test_create_pre2_32_repo "$test_count" &&
+	git -C "$test_count-clone" subtree -d pull --prefix="sub" --squash "../$test_count-sub" sub2
+'
+
+#
+# Tests for 'git subtree push'
+#
+
+test_expect_success 'push requires option --prefix' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD &&
+		echo "fatal: you must provide the --prefix option." >expected &&
+		test_must_fail git subtree push "./sub proj" from-mainline >actual 2>&1 &&
+		test_debug "printf '"expected: "'" &&
+		test_debug "cat expected" &&
+		test_debug "printf '"actual: "'" &&
+		test_debug "cat actual" &&
+		test_cmp expected actual
+	)
+'
+
+test_expect_success 'push requires path given by option --prefix must exist' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD &&
+		echo "fatal: '\''non-existent-directory'\'' does not exist; use '\''git subtree add'\''" >expected &&
+		test_must_fail git subtree push --prefix=non-existent-directory "./sub proj" from-mainline >actual 2>&1 &&
+		test_debug "printf '"expected: "'" &&
+		test_debug "cat expected" &&
+		test_debug "printf '"actual: "'" &&
+		test_debug "cat actual" &&
+		test_cmp expected actual
+	)
+'
+
+test_expect_success 'push rejects flags for add' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		test_wrong_flag git subtree split --prefix="sub dir" --squash ./"sub proj" from-mainline &&
+		test_wrong_flag git subtree split --prefix="sub dir" --message=foo ./"sub proj" from-mainline
+	)
+'
+
+test_expect_success 'push basic operation' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		before=$(git rev-parse --verify HEAD) &&
+		split_hash=$(git subtree split --prefix="sub dir") &&
+		git subtree push --prefix="sub dir" ./"sub proj" from-mainline &&
+		test "$before" = "$(git rev-parse --verify HEAD)" &&
+		test "$split_hash" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push sub dir/ with --rejoin' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree push --prefix="sub dir" --annotate="*" --rejoin ./"sub proj" from-mainline &&
+		test "$(last_commit_subject)" = "Split '\''sub dir/'\'' into commit '\''$split_hash'\''" &&
+		test "$split_hash" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push sub dir/ with --rejoin from scratch' '
+	subtree_test_create_repo "$test_count" &&
+	test_create_commit "$test_count" main1 &&
+	(
+		cd "$test_count" &&
+		mkdir "sub dir" &&
+		echo file >"sub dir"/file &&
+		git add "sub dir/file" &&
+		git commit -m"sub dir file" &&
+		split_hash=$(git subtree split --prefix="sub dir" --rejoin) &&
+		git init --bare "sub proj.git" &&
+		git subtree push --prefix="sub dir" --rejoin ./"sub proj.git" from-mainline &&
+		test "$(last_commit_subject)" = "Split '\''sub dir/'\'' into commit '\''$split_hash'\''" &&
+		test "$split_hash" = "$(git -C "sub proj.git" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push sub dir/ with --rejoin and --message' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		git subtree push --prefix="sub dir" --message="Split & rejoin" --annotate="*" --rejoin ./"sub proj" from-mainline &&
+		test "$(last_commit_subject)" = "Split & rejoin" &&
+		split_hash="$(git rev-parse --verify HEAD^2)" &&
+		test "$split_hash" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push "sub dir"/ with --rejoin and --squash' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" --squash FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git subtree pull --prefix="sub dir" --squash ./"sub proj" HEAD &&
+		MAIN=$(git rev-parse --verify HEAD) &&
+		SUB=$(git -C "sub proj" rev-parse --verify HEAD) &&
+
+		SPLIT=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree push --prefix="sub dir" --annotate="*" --rejoin --squash ./"sub proj" from-mainline &&
+
+		test_must_fail git merge-base --is-ancestor $SUB HEAD &&
+		test_must_fail git merge-base --is-ancestor $SPLIT HEAD &&
+		git rev-list HEAD ^$MAIN >commit-list &&
+		test_line_count = 2 commit-list &&
+		test "$(git rev-parse --verify HEAD:)"           = "$(git rev-parse --verify $MAIN:)" &&
+		test "$(git rev-parse --verify HEAD:"sub dir")"  = "$(git rev-parse --verify $SPLIT:)" &&
+		test "$(git rev-parse --verify HEAD^1)"          = $MAIN &&
+		test "$(git rev-parse --verify HEAD^2)"         != $SPLIT &&
+		test "$(git rev-parse --verify HEAD^2:)"         = "$(git rev-parse --verify $SPLIT:)" &&
+		test "$(last_commit_subject)" = "Split '\''sub dir/'\'' into commit '\''$SPLIT'\''" &&
+		test "$SPLIT" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push "sub dir"/ with --branch' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree push --prefix="sub dir" --annotate="*" --branch subproj-br ./"sub proj" from-mainline &&
+		test "$(git rev-parse subproj-br)" = "$split_hash" &&
+		test "$split_hash" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'check hash of push' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree push --prefix="sub dir" --annotate="*" --branch subproj-br ./"sub proj" from-mainline &&
+		test "$(git rev-parse subproj-br)" = "$split_hash" &&
+		# Check hash of split
+		new_hash=$(git rev-parse subproj-br^2) &&
+		(
+			cd ./"sub proj" &&
+			subdir_hash=$(git rev-parse HEAD) &&
+			test "$new_hash" = "$subdir_hash"
+		) &&
+		test "$split_hash" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push "sub dir"/ with --branch for an existing branch' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git branch subproj-br FETCH_HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
+		git subtree push --prefix="sub dir" --annotate="*" --branch subproj-br ./"sub proj" from-mainline &&
+		test "$(git rev-parse subproj-br)" = "$split_hash" &&
+		test "$split_hash" = "$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline)"
+	)
+'
+
+test_expect_success 'push "sub dir"/ with --branch for an incompatible branch' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git branch init HEAD &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		test_must_fail git subtree push --prefix="sub dir" --branch init "./sub proj" from-mainline
+	)
+'
+
+test_expect_success 'push "sub dir"/ with a local rev' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		bad_tree=$(git rev-parse --verify HEAD:"sub dir") &&
+		good_tree=$(git rev-parse --verify HEAD^:"sub dir") &&
+		git subtree push --prefix="sub dir" --annotate="*" ./"sub proj" HEAD^:from-mainline &&
+		split_tree=$(git -C "sub proj" rev-parse --verify refs/heads/from-mainline:) &&
+		test "$split_tree" = "$good_tree"
+	)
+'
+
+test_expect_success 'push after annotated tag was added/merged with --squash pre-v2.32.0' '
+	test_create_pre2_32_repo "$test_count" &&
+	test_create_commit "$test_count-clone" sub/main-sub1 &&
+	git -C "$test_count-clone" subtree push --prefix="sub" "../$test_count-sub" from-mainline
+'
+
+#
+# Validity checking
+#
+
+test_expect_success 'make sure exactly the right set of files ends up in the subproj' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count/sub proj" sub3 &&
+	test_create_commit "$test_count" "sub dir"/main-sub3 &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		git merge FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		git merge FETCH_HEAD &&
+
+		test_write_lines main-sub1 main-sub2 main-sub3 main-sub4 \
+			sub1 sub2 sub3 sub4 >expect &&
+		git ls-files >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'make sure the subproj *only* contains commits that affect the "sub dir"' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count/sub proj" sub3 &&
+	test_create_commit "$test_count" "sub dir"/main-sub3 &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		git merge FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		git merge FETCH_HEAD &&
+
+		test_write_lines main-sub1 main-sub2 main-sub3 main-sub4 \
+			sub1 sub2 sub3 sub4 >expect &&
+		git log --name-only --pretty=format:"" >log &&
+		sort <log | sed "/^\$/ d" >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'make sure exactly the right set of files ends up in the mainline' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count/sub proj" sub3 &&
+	test_create_commit "$test_count" "sub dir"/main-sub3 &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		git merge FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		git merge FETCH_HEAD
+	) &&
+	(
+		cd "$test_count" &&
+		git subtree pull --prefix="sub dir" ./"sub proj" HEAD &&
+
+		test_write_lines main1 main2 >chkm &&
+		test_write_lines main-sub1 main-sub2 main-sub3 main-sub4 >chkms &&
+		sed "s,^,sub dir/," chkms >chkms_sub &&
+		test_write_lines sub1 sub2 sub3 sub4 >chks &&
+		sed "s,^,sub dir/," chks >chks_sub &&
+
+		cat chkm chkms_sub chks_sub >expect &&
+		git ls-files >actual &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'make sure each filename changed exactly once in the entire history' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git config log.date relative &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count/sub proj" sub3 &&
+	test_create_commit "$test_count" "sub dir"/main-sub3 &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		git merge FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		git merge FETCH_HEAD
+	) &&
+	(
+		cd "$test_count" &&
+		git subtree pull --prefix="sub dir" ./"sub proj" HEAD &&
+
+		test_write_lines main1 main2 >chkm &&
+		test_write_lines sub1 sub2 sub3 sub4 >chks &&
+		test_write_lines main-sub1 main-sub2 main-sub3 main-sub4 >chkms &&
+		sed "s,^,sub dir/," chkms >chkms_sub &&
+
+		# main-sub?? and /"sub dir"/main-sub?? both change, because those are the
+		# changes that were split into their own history.  And "sub dir"/sub?? never
+		# change, since they were *only* changed in the subtree branch.
+		git log --name-only --pretty=format:"" >log &&
+		sort <log >sorted-log &&
+		sed "/^$/ d" sorted-log >actual &&
+
+		cat chkms chkm chks chkms_sub >expect-unsorted &&
+		sort expect-unsorted >expect &&
+		test_cmp expect actual
+	)
+'
+
+test_expect_success 'make sure the --rejoin commits never make it into subproj' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count/sub proj" sub3 &&
+	test_create_commit "$test_count" "sub dir"/main-sub3 &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		git merge FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		git merge FETCH_HEAD
+	) &&
+	(
+		cd "$test_count" &&
+		git subtree pull --prefix="sub dir" ./"sub proj" HEAD &&
+		test "$(git log --pretty=format:"%s" HEAD^2 | grep -i split)" = ""
+	)
+'
+
+test_expect_success 'make sure no "git subtree" tagged commits make it into subproj' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count/sub proj" sub3 &&
+	test_create_commit "$test_count" "sub dir"/main-sub3 &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		 git merge FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub4 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --annotate="*" --branch subproj-br --rejoin
+	) &&
+	(
+		cd "$test_count/sub proj" &&
+		git fetch .. subproj-br &&
+		git merge FETCH_HEAD
+	) &&
+	(
+		cd "$test_count" &&
+		git subtree pull --prefix="sub dir" ./"sub proj" HEAD &&
+
+		# They are meaningless to subproj since one side of the merge refers to the mainline
+		test "$(git log --pretty=format:"%s%n%b" HEAD^2 | grep "git-subtree.*:")" = ""
+	)
+'
+
+#
+# A new set of tests
+#
+
+test_expect_success 'make sure "git subtree split" find the correct parent' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git branch subproj-ref FETCH_HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --branch subproj-br &&
+
+		# at this point, the new commit parent should be subproj-ref, if it is
+		# not, something went wrong (the "newparent" of "HEAD~" commit should
+		# have been sub2, but it was not, because its cache was not set to
+		# itself)
+		test "$(git log --pretty=format:%P -1 subproj-br)" = "$(git rev-parse subproj-ref)"
+	)
+'
+
+test_expect_success 'split a new subtree without --onto option' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --branch subproj-br
+	) &&
+	mkdir "$test_count"/"sub dir2" &&
+	test_create_commit "$test_count" "sub dir2"/main-sub2 &&
+	(
+		cd "$test_count" &&
+
+		# also test that we still can split out an entirely new subtree
+		# if the parent of the first commit in the tree is not empty,
+		# then the new subtree has accidentally been attached to something
+		git subtree split --prefix="sub dir2" --branch subproj2-br &&
+		test "$(git log --pretty=format:%P -1 subproj2-br)" = ""
+	)
+'
+
+test_expect_success 'verify one file change per commit' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git branch sub1 FETCH_HEAD &&
+		git subtree add --prefix="sub dir" sub1
+	) &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir" --branch subproj-br
+	) &&
+	mkdir "$test_count"/"sub dir2" &&
+	test_create_commit "$test_count" "sub dir2"/main-sub2 &&
+	(
+		cd "$test_count" &&
+		git subtree split --prefix="sub dir2" --branch subproj2-br &&
+
+		git log --format="%H" >commit-list &&
+		while read commit
+		do
+			git log -n1 --format="" --name-only "$commit" >file-list &&
+			test_line_count -le 1 file-list || return 1
+		done <commit-list
+	)
+'
+
+test_expect_success 'push split to subproj' '
+	subtree_test_create_repo "$test_count" &&
+	subtree_test_create_repo "$test_count/sub proj" &&
+	test_create_commit "$test_count" main1 &&
+	test_create_commit "$test_count/sub proj" sub1 &&
+	(
+		cd "$test_count" &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree add --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub1 &&
+	test_create_commit "$test_count" main2 &&
+	test_create_commit "$test_count/sub proj" sub2 &&
+	test_create_commit "$test_count" "sub dir"/main-sub2 &&
+	(
+		cd $test_count/"sub proj" &&
+		git branch sub-branch-1 &&
+		cd .. &&
+		git fetch ./"sub proj" HEAD &&
+		git subtree merge --prefix="sub dir" FETCH_HEAD
+	) &&
+	test_create_commit "$test_count" "sub dir"/main-sub3 &&
+	(
+		cd "$test_count" &&
+		git subtree push ./"sub proj" --prefix "sub dir" sub-branch-1 &&
+		cd ./"sub proj" &&
+		git checkout sub-branch-1 &&
+		test "$(last_commit_subject)" = "sub dir/main-sub3"
+	)
+'
+
+#
+# This test covers 2 cases in subtree split copy_or_skip code
+# 1) Merges where one parent is a superset of the changes of the other
+#    parent regarding changes to the subtree, in this case the merge
+#    commit should be copied
+# 2) Merges where only one parent operate on the subtree, and the merge
+#    commit should be skipped
+#
+# (1) is checked by ensuring subtree_tip is a descendent of subtree_branch
+# (2) should have a check added (not_a_subtree_change shouldn't be present
+#     on the produced subtree)
+#
+# Other related cases which are not tested (or currently handled correctly)
+# - Case (1) where there are more than 2 parents, it will sometimes correctly copy
+#   the merge, and sometimes not
+# - Merge commit where both parents have same tree as the merge, currently
+#   will always be skipped, even if they reached that state via different
+#   set of commits.
+#
+
+test_expect_success 'subtree descendant check' '
+	subtree_test_create_repo "$test_count" &&
+	defaultBranch=$(sed "s,ref: refs/heads/,," "$test_count/.git/HEAD") &&
+	test_create_commit "$test_count" folder_subtree/a &&
+	(
+		cd "$test_count" &&
+		git branch branch
+	) &&
+	test_create_commit "$test_count" folder_subtree/0 &&
+	test_create_commit "$test_count" folder_subtree/b &&
+	cherry=$(cd "$test_count" && git rev-parse HEAD) &&
+	(
+		cd "$test_count" &&
+		git checkout branch
+	) &&
+	test_create_commit "$test_count" commit_on_branch &&
+	(
+		cd "$test_count" &&
+		git cherry-pick $cherry &&
+		git checkout $defaultBranch &&
+		git merge -m "merge should be kept on subtree" branch &&
+		git branch no_subtree_work_branch
+	) &&
+	test_create_commit "$test_count" folder_subtree/d &&
+	(
+		cd "$test_count" &&
+		git checkout no_subtree_work_branch
+	) &&
+	test_create_commit "$test_count" not_a_subtree_change &&
+	(
+		cd "$test_count" &&
+		git checkout $defaultBranch &&
+		git merge -m "merge should be skipped on subtree" no_subtree_work_branch &&
+
+		git subtree split --prefix folder_subtree/ --branch subtree_tip $defaultBranch &&
+		git subtree split --prefix folder_subtree/ --branch subtree_branch branch &&
+		test $(git rev-list --count subtree_tip..subtree_branch) = 0
+	)
+'
+
+test_done
-- 
cgit v1.2.3