Keep track of authors across local commits and branch commits for suggestions

Previously, we would only show the authors based on local commits, but sometimes you want to set a commit author
to that of a commit on another branch. Now, so long as you've viewed the branch's commits, the author will appear
as a suggestion.

pkg/integration/tests/commit/set_author.go

@@ -5,29 +5,58 @@ import (
 	. "github.com/jesseduffield/lazygit/pkg/integration/components"
 )
 
+// Originally we only suggested authors present in the current branch, but now
+// we include authors from other branches whose commits you've looked at in the
+// lazygit session.
+
 var SetAuthor = NewIntegrationTest(NewIntegrationTestArgs{
 	Description:  "Set author on a commit",
 	ExtraCmdArgs: []string{},
 	Skip:         false,
 	SetupConfig:  func(config *config.AppConfig) {},
 	SetupRepo: func(shell *Shell) {
+		shell.NewBranch("original")
+
 		shell.SetConfig("user.email", "Bill@example.com")
 		shell.SetConfig("user.name", "Bill Smith")
 
 		shell.EmptyCommit("one")
 
+		shell.NewBranch("other")
+
 		shell.SetConfig("user.email", "John@example.com")
 		shell.SetConfig("user.name", "John Smith")
 
 		shell.EmptyCommit("two")
+
+		shell.Checkout("original")
 	},
 	Run: func(t *TestDriver, keys config.KeybindingConfig) {
 		t.Views().Commits().
 			Focus().
+			Lines(
+				Contains("BS").Contains("one").IsSelected(),
+			)
+
+		t.Views().Branches().
+			Focus().
+			Lines(
+				Contains("original").IsSelected(),
+				Contains("other"),
+			).
+			NavigateToLine(Contains("other")).
+			PressEnter()
+
+		// ensuring we get these commit authors as suggestions
+		t.Views().SubCommits().
+			IsFocused().
 			Lines(
 				Contains("JS").Contains("two").IsSelected(),
 				Contains("BS").Contains("one"),
-			).
+			)
+
+		t.Views().Commits().
+			Focus().
 			Press(keys.Commits.ResetCommitAuthor).
 			Tap(func() {
 				t.ExpectPopup().Menu().
@@ -38,14 +67,13 @@ var SetAuthor = NewIntegrationTest(NewIntegrationTestArgs{
 				t.ExpectPopup().Prompt().
 					Title(Contains("Set author")).
 					SuggestionLines(
-						Contains("John Smith"),
 						Contains("Bill Smith"),
+						Contains("John Smith"),
 					).
 					ConfirmSuggestion(Contains("John Smith"))
 			}).
 			Lines(
-				Contains("JS").Contains("two").IsSelected(),
-				Contains("BS").Contains("one"),
+				Contains("JS").Contains("one").IsSelected(),
 			)
 	},
 })