merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 39 insertions, 15 deletions

diff --git a/third_party/git/t/t3420-rebase-autostash.sh b/third_party/git/t/t3420-rebase-autostash.sh
index b8f4d0346723..ca331733fbb5 100755
--- a/third_party/git/t/t3420-rebase-autostash.sh
+++ b/third_party/git/t/t3420-rebase-autostash.sh
@@ -34,10 +34,9 @@ test_expect_success setup '
 	remove_progress_re="$(printf "s/.*\\r//")"
 '
 
-create_expected_success_am () {
+create_expected_success_apply () {
 	cat >expected <<-EOF
 	$(grep "^Created autostash: [0-9a-f][0-9a-f]*\$" actual)
-	HEAD is now at $(git rev-parse --short feature-branch) third commit
 	First, rewinding head to replay your work on top of it...
 	Applying: second commit
 	Applying: third commit
@@ -45,19 +44,17 @@ create_expected_success_am () {
 	EOF
 }
 
-create_expected_success_interactive () {
+create_expected_success_merge () {
 	q_to_cr >expected <<-EOF
 	$(grep "^Created autostash: [0-9a-f][0-9a-f]*\$" actual)
-	HEAD is now at $(git rev-parse --short feature-branch) third commit
 	Applied autostash.
 	Successfully rebased and updated refs/heads/rebased-feature-branch.
 	EOF
 }
 
-create_expected_failure_am () {
+create_expected_failure_apply () {
 	cat >expected <<-EOF
 	$(grep "^Created autostash: [0-9a-f][0-9a-f]*\$" actual)
-	HEAD is now at $(git rev-parse --short feature-branch) third commit
 	First, rewinding head to replay your work on top of it...
 	Applying: second commit
 	Applying: third commit
@@ -67,10 +64,9 @@ create_expected_failure_am () {
 	EOF
 }
 
-create_expected_failure_interactive () {
+create_expected_failure_merge () {
 	cat >expected <<-EOF
 	$(grep "^Created autostash: [0-9a-f][0-9a-f]*\$" actual)
-	HEAD is now at $(git rev-parse --short feature-branch) third commit
 	Applying autostash resulted in conflicts.
 	Your changes are safe in the stash.
 	You can run "git stash pop" or "git stash drop" at any time.
@@ -105,9 +101,9 @@ testrebase () {
 
 	test_expect_success "rebase$type --autostash: check output" '
 		test_when_finished git branch -D rebased-feature-branch &&
-		suffix=${type#\ --} && suffix=${suffix:-am} &&
-		if test ${suffix} = "merge"; then
-			suffix=interactive
+		suffix=${type#\ --} && suffix=${suffix:-apply} &&
+		if test ${suffix} = "interactive"; then
+			suffix=merge
 		fi &&
 		create_expected_success_$suffix &&
 		sed "$remove_progress_re" <actual >actual2 &&
@@ -188,6 +184,26 @@ testrebase () {
 		git checkout feature-branch
 	'
 
+	test_expect_success "rebase$type: --quit" '
+		test_config rebase.autostash true &&
+		git reset --hard &&
+		git checkout -b rebased-feature-branch feature-branch &&
+		test_when_finished git branch -D rebased-feature-branch &&
+		echo dirty >>file3 &&
+		git diff >expect &&
+		test_must_fail git rebase$type related-onto-branch &&
+		test_path_is_file $dotest/autostash &&
+		test_path_is_missing file3 &&
+		git rebase --quit &&
+		test_when_finished git stash drop &&
+		test_path_is_missing $dotest/autostash &&
+		! grep dirty file3 &&
+		git stash show -p >actual &&
+		test_cmp expect actual &&
+		git reset --hard &&
+		git checkout feature-branch
+	'
+
 	test_expect_success "rebase$type: non-conflicting rebase, conflicting stash" '
 		test_config rebase.autostash true &&
 		git reset --hard &&
@@ -206,9 +222,9 @@ testrebase () {
 
 	test_expect_success "rebase$type: check output with conflicting stash" '
 		test_when_finished git branch -D rebased-feature-branch &&
-		suffix=${type#\ --} && suffix=${suffix:-am} &&
-		if test ${suffix} = "merge"; then
-			suffix=interactive
+		suffix=${type#\ --} && suffix=${suffix:-apply} &&
+		if test ${suffix} = "interactive"; then
+			suffix=merge
 		fi &&
 		create_expected_failure_$suffix &&
 		sed "$remove_progress_re" <actual >actual2 &&
@@ -238,7 +254,7 @@ test_expect_success "rebase: noop rebase" '
 	git checkout feature-branch
 '
 
-testrebase "" .git/rebase-apply
+testrebase " --apply" .git/rebase-apply
 testrebase " --merge" .git/rebase-merge
 testrebase " --interactive" .git/rebase-merge
 
@@ -306,4 +322,12 @@ test_expect_success 'branch is left alone when possible' '
 	test unchanged-branch = "$(git rev-parse --abbrev-ref HEAD)"
 '
 
+test_expect_success 'never change active branch' '
+	git checkout -b not-the-feature-branch unrelated-onto-branch &&
+	test_when_finished "git reset --hard && git checkout master" &&
+	echo changed >file0 &&
+	git rebase --autostash not-the-feature-branch feature-branch &&
+	test_cmp_rev not-the-feature-branch unrelated-onto-branch
+'
+
 test_done