Run integration tests with all supported git versions (#2754)

Run integration tests with various different git versions, more or less
randomly picked from our range of supported versions. Based on
@Ryooooooga's work in #2459, but also restructured a bit.

All tests pass for all git versions, but only after cherry-picking
#2747.

I decided to go with @Ryooooooga's approach and do it without using
docker. I also didn't use docker locally; to reproduce the various
failures that I had to fix, I simply installed the respective git
versions locally and used something like
`PATH=~/git-versions/2.25.1/bin:$PATH
./scripts/run_integration_tests.sh`.

17 files changed, 103 insertions, 46 deletions

diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index 49fad7731..398fd1ede 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Unshallow repo
         run: git fetch --prune --unshallow
       - name: Setup Go
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3494e6a40..9326ca103 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
       GOFLAGS: -mod=vendor
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Setup Go
         uses: actions/setup-go@v1
         with:
@@ -47,13 +47,47 @@ jobs:
         run: |
           go test ./... -short
   integration-tests:
+    strategy:
+      fail-fast: false
+      matrix:
+        git-version:
+          - 2.20.0 # oldest supported version
+          - 2.22.5
+          - 2.23.0
+          - 2.25.1
+          - 2.30.8
+          - latest # We rely on github to have the latest version installed on their VMs
     runs-on: ubuntu-latest
-    name: "Integration Tests"
+    name: "Integration Tests - git ${{matrix.git-version}}"
     env:
       GOFLAGS: -mod=vendor
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
+      - name: Restore Git cache
+        if: matrix.git-version != 'latest'
+        id: cache-git-restore
+        uses: actions/cache/restore@v3
+        with:
+          path: ~/git-${{matrix.git-version}}
+          key: ${{runner.os}}-git-${{matrix.git-version}}
+      - name: Build Git ${{matrix.git-version}}
+        if: steps.cache-git-restore.outputs.cache-hit != 'true' && matrix.git-version != 'latest'
+        run: >
+          sudo apt-get update && sudo apt-get install --no-install-recommends -y build-essential ca-certificates curl gettext libexpat1-dev libssl-dev libz-dev openssl
+          && curl -sL "https://mirrors.edge.kernel.org/pub/software/scm/git/git-${{matrix.git-version}}.tar.xz" -o - | tar xJ -C "$HOME"
+          && cd "$HOME/git-${{matrix.git-version}}"
+          && ./configure
+          && make -j
+      - name: Install Git ${{matrix.git-version}}
+        if: matrix.git-version != 'latest'
+        run: sudo make -C "$HOME/git-${{matrix.git-version}}" -j install
+      - name: Save Git cache
+        if: steps.cache-git-restore.outputs.cache-hit != 'true' && matrix.git-version != 'latest'
+        uses: actions/cache/save@v3
+        with:
+          path: ~/git-${{matrix.git-version}}
+          key: ${{runner.os}}-git-${{matrix.git-version}}
       - name: Setup Go
         uses: actions/setup-go@v1
         with:
@@ -67,9 +101,11 @@ jobs:
           key: ${{runner.os}}-go-${{hashFiles('**/go.sum')}}-test
           restore-keys: |
             ${{runner.os}}-go-
+      - name: Print git version
+        run: git --version
       - name: Test code
         run: |
-          go test pkg/integration/clients/*.go
+          ./scripts/run_integration_tests.sh
   build:
     runs-on: ubuntu-latest
     env:
@@ -77,7 +113,7 @@ jobs:
       GOARCH: amd64
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Setup Go
         uses: actions/setup-go@v1
         with:
@@ -113,7 +149,7 @@ jobs:
       GOARCH: amd64
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Setup Go
         uses: actions/setup-go@v1
         with:
@@ -147,7 +183,7 @@ jobs:
       GOFLAGS: -mod=vendor
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Setup Go
         uses: actions/setup-go@v1
         with:
diff --git a/.github/workflows/sponsors.yml b/.github/workflows/sponsors.yml
index e4c780445..cdf328a73 100644
--- a/.github/workflows/sponsors.yml
+++ b/.github/workflows/sponsors.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout 🛎️
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Generate Sponsors 💖
         uses: JamesIves/github-sponsors-readme-action@v1.0.8
diff --git a/pkg/commands/git_commands/patch.go b/pkg/commands/git_commands/patch.go
index 942785314..3159ff31d 100644
--- a/pkg/commands/git_commands/patch.go
+++ b/pkg/commands/git_commands/patch.go
@@ -221,7 +221,7 @@ func (self *PatchCommands) MovePatchToSelectedCommit(commits []*models.Commit, s
 
 func (self *PatchCommands) MovePatchIntoIndex(commits []*models.Commit, commitIdx int, stash bool) error {
 	if stash {
-		if err := self.stash.Save(self.Tr.StashPrefix + commits[commitIdx].Sha); err != nil {
+		if err := self.stash.Push(self.Tr.StashPrefix + commits[commitIdx].Sha); err != nil {
 			return err
 		}
 	}
diff --git a/pkg/commands/git_commands/stash.go b/pkg/commands/git_commands/stash.go
index 86018fd8d..562e7b97d 100644
--- a/pkg/commands/git_commands/stash.go
+++ b/pkg/commands/git_commands/stash.go
@@ -52,9 +52,9 @@ func (self *StashCommands) Apply(index int) error {
 	return self.cmd.New(cmdArgs).Run()
 }
 
-// Save save stash
-func (self *StashCommands) Save(message string) error {
-	cmdArgs := NewGitCmd("stash").Arg("save", message).
+// Push push stash
+func (self *StashCommands) Push(message string) error {
+	cmdArgs := NewGitCmd("stash").Arg("push", "-m", message).
 		ToArgv()
 
 	return self.cmd.New(cmdArgs).Run()
@@ -63,8 +63,9 @@ func (self *StashCommands) Save(message string) error {
 func (self *StashCommands) Store(sha string, message string) error {
 	trimmedMessage := strings.Trim(message, " \t")
 
-	cmdArgs := NewGitCmd("stash").Arg("store", sha).
+	cmdArgs := NewGitCmd("stash").Arg("store").
 		ArgIf(trimmedMessage != "", "-m", trimmedMessage).
+		Arg(sha).
 		ToArgv()
 
 	return self.cmd.New(cmdArgs).Run()
@@ -93,7 +94,7 @@ func (self *StashCommands) ShowStashEntryCmdObj(index int, ignoreWhitespace bool
 }
 
 func (self *StashCommands) StashAndKeepIndex(message string) error {
-	cmdArgs := NewGitCmd("stash").Arg("save", message, "--keep-index").
+	cmdArgs := NewGitCmd("stash").Arg("push", "--keep-index", "-m", message).
 		ToArgv()
 
 	return self.cmd.New(cmdArgs).Run()
@@ -107,7 +108,7 @@ func (self *StashCommands) StashUnstagedChanges(message string) error {
 	).Run(); err != nil {
 		return err
 	}
-	if err := self.Save(message); err != nil {
+	if err := self.Push(message); err != nil {
 		return err
 	}
 
@@ -129,7 +130,7 @@ func (self *StashCommands) SaveStagedChanges(message string) error {
 		return err
 	}
 
-	if err := self.Save(message); err != nil {
+	if err := self.Push(message); err != nil {
 		return err
 	}
 
@@ -171,7 +172,7 @@ func (self *StashCommands) SaveStagedChanges(message string) error {
 
 func (self *StashCommands) StashIncludeUntrackedChanges(message string) error {
 	return self.cmd.New(
-		NewGitCmd("stash").Arg("save", message, "--include-untracked").
+		NewGitCmd("stash").Arg("push", "--include-untracked", "-m", message).
 			ToArgv(),
 	).Run()
 }
diff --git a/pkg/commands/git_commands/stash_test.go b/pkg/commands/git_commands/stash_test.go
index d19c0a519..1c8976c6d 100644
--- a/pkg/commands/git_commands/stash_test.go
+++ b/pkg/commands/git_commands/stash_test.go
@@ -37,10 +37,10 @@ func TestStashPop(t *testing.T) {
 
 func TestStashSave(t *testing.T) {
 	runner := oscommands.NewFakeRunner(t).
-		ExpectGitArgs([]string{"stash", "save", "A stash message"}, "", nil)
+		ExpectGitArgs([]string{"stash", "push", "-m", "A stash message"}, "", nil)
 	instance := buildStashCommands(commonDeps{runner: runner})
 
-	assert.NoError(t, instance.Save("A stash message"))
+	assert.NoError(t, instance.Push("A stash message"))
 	runner.CheckForMissingCalls()
 }
 
@@ -57,7 +57,7 @@ func TestStashStore(t *testing.T) {
 			testName: "Non-empty message",
 			sha:      "0123456789abcdef",
 			message:  "New stash name",
-			expected: []string{"stash", "store", "0123456789abcdef", "-m", "New stash name"},
+			expected: []string{"stash", "store", "-m", "New stash name", "0123456789abcdef"},
 		},
 		{
 			testName: "Empty message",
@@ -162,7 +162,7 @@ func TestStashRename(t *testing.T) {
 			expectedShaCmd:   []string{"rev-parse", "refs/stash@{3}"},
 			shaResult:        "f0d0f20f2f61ffd6d6bfe0752deffa38845a3edd\n",
 			expectedDropCmd:  []string{"stash", "drop", "stash@{3}"},
-			expectedStoreCmd: []string{"stash", "store", "f0d0f20f2f61ffd6d6bfe0752deffa38845a3edd", "-m", "New message"},
+			expectedStoreCmd: []string{"stash", "store", "-m", "New message", "f0d0f20f2f61ffd6d6bfe0752deffa38845a3edd"},
 		},
 		{
 			testName:         "Empty message",
diff --git a/pkg/gui/controllers/files_controller.go b/pkg/gui/controllers/files_controller.go
index 6d4647e01..1b5d44080 100644
--- a/pkg/gui/controllers/files_controller.go
+++ b/pkg/gui/controllers/files_controller.go
@@ -697,7 +697,7 @@ func (self *FilesController) createStashMenu() error {
 					if !self.c.Helpers().WorkingTree.IsWorkingTreeDirty() {
 						return self.c.ErrorMsg(self.c.Tr.NoFilesToStash)
 					}
-					return self.handleStashSave(self.c.Git().Stash.Save, self.c.Tr.Actions.StashAllChanges)
+					return self.handleStashSave(self.c.Git().Stash.Push, self.c.Tr.Actions.StashAllChanges)
 				},
 				Key: 'a',
 			},
@@ -740,7 +740,7 @@ func (self *FilesController) createStashMenu() error {
 						return self.handleStashSave(self.c.Git().Stash.StashUnstagedChanges, self.c.Tr.Actions.StashUnstagedChanges)
 					}
 					// ordinary stash
-					return self.handleStashSave(self.c.Git().Stash.Save, self.c.Tr.Actions.StashUnstagedChanges)
+					return self.handleStashSave(self.c.Git().Stash.Push, self.c.Tr.Actions.StashUnstagedChanges)
 				},
 				Key: 'u',
 			},
@@ -749,7 +749,7 @@ func (self *FilesController) createStashMenu() error {
 }
 
 func (self *FilesController) stash() error {
-	return self.handleStashSave(self.c.Git().Stash.Save, self.c.Tr.Actions.StashAllChanges)
+	return self.handleStashSave(self.c.Git().Stash.Push, self.c.Tr.Actions.StashAllChanges)
 }
 
 func (self *FilesController) createResetToUpstreamMenu() error {
diff --git a/pkg/gui/controllers/helpers/refs_helper.go b/pkg/gui/controllers/helpers/refs_helper.go
index af3a0875f..3c96add84 100644
--- a/pkg/gui/controllers/helpers/refs_helper.go
+++ b/pkg/gui/controllers/helpers/refs_helper.go
@@ -65,7 +65,7 @@ func (self *RefsHelper) CheckoutRef(ref string, options types.CheckoutRefOptions
 					Title:  self.c.Tr.AutoStashTitle,
 					Prompt: self.c.Tr.AutoStashPrompt,
 					HandleConfirm: func() error {
-						if err := self.c.Git().Stash.Save(self.c.Tr.StashPrefix + ref); err != nil {
+						if err := self.c.Git().Stash.Push(self.c.Tr.StashPrefix + ref); err != nil {
 							return self.c.Error(err)
 						}
 						if err := self.c.Git().Branch.Checkout(ref, cmdOptions); err != nil {
diff --git a/pkg/gui/controllers/undo_controller.go b/pkg/gui/controllers/undo_controller.go
index 60eff1888..1546d0c46 100644
--- a/pkg/gui/controllers/undo_controller.go
+++ b/pkg/gui/controllers/undo_controller.go
@@ -249,7 +249,7 @@ func (self *UndoController) hardResetWithAutoStash(commitSha string, options har
 			Prompt: self.c.Tr.AutoStashPrompt,
 			HandleConfirm: func() error {
 				return self.c.WithWaitingStatus(options.WaitingStatus, func(gocui.Task) error {
-					if err := self.c.Git().Stash.Save(self.c.Tr.StashPrefix + commitSha); err != nil {
+					if err := self.c.Git().Stash.Push(self.c.Tr.StashPrefix + commitSha); err != nil {
 						return self.c.Error(err)
 					}
 					if err := reset(); err != nil {
diff --git a/pkg/integration/components/runner.go b/pkg/integration/components/runner.go
index 9a787c864..40921fee9 100644
--- a/pkg/integration/components/runner.go
+++ b/pkg/integration/components/runner.go
@@ -141,7 +141,7 @@ func buildLazygit() error {
 
 func createFixture(test *IntegrationTest, paths Paths, rootDir string) error {
 	shell := NewShell(paths.ActualRepo(), func(errorMsg string) { panic(errorMsg) })
-	shell.Init("master")
+	shell.Init()
 
 	os.Setenv(GIT_CONFIG_GLOBAL_ENV_VAR, globalGitConfigPath(rootDir))
 
diff --git a/pkg/integration/components/shell.go b/pkg/integration/components/shell.go
index 03bd747e2..decb748da 100644
--- a/pkg/integration/components/shell.go
+++ b/pkg/integration/components/shell.go
@@ -196,11 +196,6 @@ func (self *Shell) CreateNCommitsStartingAt(n, startIndex int) *Shell {
 	return self
 }
 
-func (self *Shell) StashWithMessage(message string) *Shell {
-	self.RunCommand([]string{"git", "stash", "-m", message})
-	return self
-}
-
 func (self *Shell) SetConfig(key string, value string) *Shell {
 	self.RunCommand([]string{"git", "config", "--local", key, value})
 	return self
@@ -245,7 +240,7 @@ func (self *Shell) HardReset(ref string) *Shell {
 }
 
 func (self *Shell) Stash(message string) *Shell {
-	self.RunCommand([]string{"git", "stash", "-m", message})
+	self.RunCommand([]string{"git", "stash", "push", "-m", message})
 	return self
 }
 
@@ -254,8 +249,8 @@ func (self *Shell) StartBisect(good string, bad string) *Shell {
 	return self
 }
 
-func (self *Shell) Init(mainBranch string) *Shell {
-	self.RunCommand([]string{"git", "init", "-b", mainBranch})
+func (self *Shell) Init() *Shell {
+	self.RunCommand([]string{"git", "-c", "init.defaultBranch=master", "init"})
 	return self
 }
 
diff --git a/pkg/integration/tests/patch_building/apply_in_reverse_with_conflict.go b/pkg/integration/tests/patch_building/apply_in_reverse_with_conflict.go
index f767ba3a0..74dd34b3e 100644
--- a/pkg/integration/tests/patch_building/apply_in_reverse_with_conflict.go
+++ b/pkg/integration/tests/patch_building/apply_in_reverse_with_conflict.go
@@ -55,8 +55,7 @@ var ApplyInReverseWithConflict = NewIntegrationTest(NewIntegrationTestArgs{
 
 		t.ExpectPopup().Alert().
 			Title(Equals("Error")).
-			Content(Contains("Applied patch to 'file1' with conflicts.").
-				Contains("Applied patch to 'file2' cleanly.")).
+			Content(Contains("Applied patch to 'file1' with conflicts.")).
 			Confirm()
 
 		t.Views().Files().
diff --git a/pkg/integration/tests/stash/rename.go b/pkg/integration/tests/stash/rename.go
index 9a079c9db..eb57fa654 100644
--- a/pkg/integration/tests/stash/rename.go
+++ b/pkg/integration/tests/stash/rename.go
@@ -14,9 +14,9 @@ var Rename = NewIntegrationTest(NewIntegrationTestArgs{
 		shell.
 			EmptyCommit("blah").
 			CreateFileAndAdd("file-1", "change to stash1").
-			StashWithMessage("foo").
+			Stash("foo").
 			CreateFileAndAdd("file-2", "change to stash2").
-			StashWithMessage("bar")
+			Stash("bar")
 	},
 	Run: func(t *TestDriver, keys config.KeybindingConfig) {
 		t.Views().Stash().
diff --git a/pkg/integration/tests/sync/pull_rebase.go b/pkg/integration/tests/sync/pull_rebase.go
index 41ca82436..77810426e 100644
--- a/pkg/integration/tests/sync/pull_rebase.go
+++ b/pkg/integration/tests/sync/pull_rebase.go
@@ -15,14 +15,16 @@ var PullRebase = NewIntegrationTest(NewIntegrationTestArgs{
 		shell.Commit("one")
 		shell.UpdateFileAndAdd("file", "content2")
 		shell.Commit("two")
-		shell.EmptyCommit("three")
+		shell.CreateFileAndAdd("file3", "content3")
+		shell.Commit("three")
 
 		shell.CloneIntoRemote("origin")
 
 		shell.SetBranchUpstream("master", "origin/master")
 
 		shell.HardReset("HEAD^^")
-		shell.EmptyCommit("four")
+		shell.CreateFileAndAdd("file4", "content4")
+		shell.Commit("four")
 
 		shell.SetConfig("pull.rebase", "true")
 	},
diff --git a/pkg/integration/tests/sync/pull_rebase_interactive_conflict.go b/pkg/integration/tests/sync/pull_rebase_interactive_conflict.go
index 9e66f3bcd..a6a3f5356 100644
--- a/pkg/integration/tests/sync/pull_rebase_interactive_conflict.go
+++ b/pkg/integration/tests/sync/pull_rebase_interactive_conflict.go
@@ -15,7 +15,8 @@ var PullRebaseInteractiveConflict = NewIntegrationTest(NewIntegrationTestArgs{
 		shell.Commit("one")
 		shell.UpdateFileAndAdd("file", "content2")
 		shell.Commit("two")
-		shell.EmptyCommit("three")
+		shell.CreateFileAndAdd("file3", "content3")
+		shell.Commit("three")
 
 		shell.CloneIntoRemote("origin")
 
@@ -24,7 +25,8 @@ var PullRebaseInteractiveConflict = NewIntegrationTest(NewIntegrationTestArgs{
 		shell.HardReset("HEAD^^")
 		shell.UpdateFileAndAdd("file", "content4")
 		shell.Commit("four")
-		shell.EmptyCommit("five")
+		shell.CreateFileAndAdd("file5", "content5")
+		shell.Commit("five")
 
 		shell.SetConfig("pull.rebase", "interactive")
 	},
diff --git a/pkg/integration/tests/sync/pull_rebase_interactive_conflict_drop.go b/pkg/integration/tests/sync/pull_rebase_interactive_conflict_drop.go
index 9ca3a0ebe..b53790964 100644
--- a/pkg/integration/tests/sync/pull_rebase_interactive_conflict_drop.go
+++ b/pkg/integration/tests/sync/pull_rebase_interactive_conflict_drop.go
@@ -15,7 +15,8 @@ var PullRebaseInteractiveConflictDrop = NewIntegrationTest(NewIntegrationTestArg
 		shell.Commit("one")
 		shell.UpdateFileAndAdd("file", "content2")
 		shell.Commit("two")
-		shell.EmptyCommit("three")
+		shell.CreateFileAndAdd("file3", "content3")
+		shell.Commit("three")
 
 		shell.CloneIntoRemote("origin")
 
@@ -24,7 +25,8 @@ var PullRebaseInteractiveConflictDrop = NewIntegrationTest(NewIntegrationTestArg
 		shell.HardReset("HEAD^^")
 		shell.UpdateFileAndAdd("file", "content4")
 		shell.Commit("four")
-		shell.EmptyCommit("five")
+		shell.CreateFileAndAdd("fil5", "content5")
+		shell.Commit("five")
 
 		shell.SetConfig("pull.rebase", "interactive")
 	},
diff --git a/scripts/run_integration_tests.sh b/scripts/run_integration_tests.sh
new file mode 100755
index 000000000..d09bd21e7
--- /dev/null
+++ b/scripts/run_integration_tests.sh
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+# This is ugly, but older versions of git don't support the GIT_CONFIG_GLOBAL
+# env var; the only way to run tests for these old versions is to copy our test
+# config file to the actual global location. Move an existing file out of the
+# way so that we can restore it at the end.
+if test -f ~/.gitconfig; then
+  mv ~/.gitconfig ~/.gitconfig.lazygit.bak
+fi
+
+cp test/global_git_config ~/.gitconfig
+
+go test pkg/integration/clients/*.go
+EXITCODE=$?
+
+if test -f ~/.gitconfig.lazygit.bak; then
+  mv ~/.gitconfig.lazygit.bak ~/.gitconfig
+fi
+
+exit $EXITCODE