refactor: reduce git cli calls

should impact #45

docs/docs/segment-git.md

@@ -31,7 +31,7 @@ Local changes can also shown by default using the following syntax for both the
     "local_staged_icon": "",
     "rebase_icon": " ",
     "cherry_pick_icon": " ",
-    "detached_icon": " ",
+    "commit_icon": " ",
     "tag_icon": "笠 "
   }
 }
@@ -48,5 +48,5 @@ Local changes can also shown by default using the following syntax for both the
 - display_status: `boolean` - display the local changes or not
 - rebase_icon: `string` - icon/text to display before the context when in a rebase
 - cherry_pick_icon: `string` - icon/text to display before the context when doing a cherry-pick
-- detached_icon: `string` - icon/text to display before the detached head context
+- commit_icon: `string` - icon/text to display before the commit context
 - tag_icon: `string` - icon/text to display before the tag context

segment_git.go

@@ -13,7 +13,7 @@ type gitRepo struct {
 	staging    *gitStatus
 	ahead      int
 	behind     int
-	branch     string
+	HEAD       string
 	upstream   string
 	stashCount int
 }
@@ -51,8 +51,8 @@ const (
 	RebaseIcon Property = "rebase_icon"
 	//CherryPickIcon shows before the cherry-pick context
 	CherryPickIcon Property = "cherry_pick_icon"
-	//DetachedIcon shows before the detached context
+	//CommitIcon shows before the detached context
-	DetachedIcon Property = "detached_icon"
+	CommitIcon Property = "commit_icon"
 	//TagIcon shows before the tag context
 	TagIcon Property = "tag_icon"
 )
@@ -69,7 +69,7 @@ func (g *git) string() string {
 	g.getGitStatus()
 	buffer := new(bytes.Buffer)
 	// branchName
-	fmt.Fprintf(buffer, "%s", g.repo.branch)
+	fmt.Fprintf(buffer, "%s", g.repo.HEAD)
 	displayStatus := g.props.getBool(DisplayStatus, true)
 	if !displayStatus {
 		return buffer.String()
@@ -115,7 +115,7 @@ func (g *git) getGitStatus() {
 		g.repo.behind, _ = strconv.Atoi(status["behind"])
 		g.repo.upstream = status["upstream"]
 	}
-	g.repo.branch = g.getGitHEADContext()
+	g.repo.HEAD = g.getGitHEADContext(status["local"])
 	g.repo.stashCount = g.getStashContext()
 }
 
@@ -124,41 +124,21 @@ func (g *git) getGitCommandOutput(args ...string) string {
 	return g.env.runCommand("git", args...)
 }
 
-func (g *git) getGitHEADContext() string {
+func (g *git) getGitHEADContext(ref string) string {
-	commit := g.getGitCommandOutput("rev-parse", "--short", "HEAD")
+	branchIcon := g.props.getString(BranchIcon, "BRANCH:")
-	rebase := g.getGitCommandOutput("rebase", "--show-current-patch")
-	if rebase != "" {
-		return g.getGitRebaseContext(commit)
-	}
-	// branch
-	icon := g.props.getString(BranchIcon, "BRANCH:")
-	ref := g.getGitCommandOutput("symbolic-ref", "-q", "--short", "HEAD")
 	if ref == "" {
-		// get a tag name if there's a match for HEAD
+		ref = g.getPrettyHEADName()
-		icon = g.props.getString(TagIcon, "TAG:")
+	} else {
-		ref = g.getGitCommandOutput("describe", "--tags", "--exact-match")
+		ref = fmt.Sprintf("%s%s", branchIcon, ref)
 	}
-	// validate additional context
+	// rebase
-	if g.env.hasFiles(".git/CHERRY_PICK_HEAD") {
-		sha := g.getGitRefFileSymbolicName("CHERRY_PICK_HEAD")
-		icon := g.props.getString(CherryPickIcon, "CHERRY PICK:")
-		return fmt.Sprintf("%s%s onto %s", icon, sha, ref)
-	}
-	if ref == "" {
-		ref = commit
-		icon = g.props.getString(DetachedIcon, "DETACHED:")
-	}
-	return fmt.Sprintf("%s%s", icon, ref)
-}
-
-func (g *git) getGitRebaseContext(commit string) string {
 	if g.env.hasFolder(".git/rebase-merge") {
 		origin := g.getGitRefFileSymbolicName("rebase-merge/orig-head")
 		onto := g.getGitRefFileSymbolicName("rebase-merge/onto")
 		step := g.getGitFileContents("rebase-merge/msgnum")
 		total := g.getGitFileContents("rebase-merge/end")
 		icon := g.props.getString(RebaseIcon, "REBASE:")
-		return fmt.Sprintf("%s%s onto %s (%s/%s) at %s", icon, origin, onto, step, total, commit)
+		return fmt.Sprintf("%s%s%s onto %s%s (%s/%s) at %s", icon, branchIcon, origin, branchIcon, onto, step, total, ref)
 	}
 	if g.env.hasFolder(".git/rebase-apply") {
 		head := g.getGitFileContents("rebase-apply/head-name")
@@ -166,10 +146,26 @@ func (g *git) getGitRebaseContext(commit string) string {
 		step := g.getGitFileContents("rebase-apply/next")
 		total := g.getGitFileContents("rebase-apply/last")
 		icon := g.props.getString(RebaseIcon, "REBASING:")
-		return fmt.Sprintf("%s%s (%s/%s) at %s", icon, origin, step, total, commit)
+		return fmt.Sprintf("%s%s%s (%s/%s) at %s", icon, branchIcon, origin, step, total, ref)
 	}
-	icon := g.props.getString(RebaseIcon, "REBASE:")
+	// cherry-pick
-	return fmt.Sprintf("%sUNKNOWN", icon)
+	if g.env.hasFiles(".git/CHERRY_PICK_HEAD") {
+		sha := g.getGitRefFileSymbolicName("CHERRY_PICK_HEAD")
+		icon := g.props.getString(CherryPickIcon, "CHERRY PICK:")
+		return fmt.Sprintf("%s%s onto %s", icon, sha, ref)
+	}
+	return ref
+}
+
+func (g *git) getPrettyHEADName() string {
+	// check for tag
+	ref := g.getGitCommandOutput("describe", "--tags", "--exact-match")
+	if ref != "" {
+		return fmt.Sprintf("%s%s", g.props.getString(TagIcon, "TAG:"), ref)
+	}
+	// fallback to commit
+	ref = g.getGitCommandOutput("rev-parse", "--short", "HEAD")
+	return fmt.Sprintf("%s%s", g.props.getString(CommitIcon, "COMMIT:"), ref)
 }
 
 func (g *git) getGitFileContents(file string) string {

segment_git_test.go

@@ -68,8 +68,6 @@ func setupHEADContextEnv(context *detachedContext) environmentInfo {
 	env.On("getFileContent", ".git/CHERRY_PICK_HEAD").Return(context.cherryPickSHA)
 	env.On("hasFiles", ".git/CHERRY_PICK_HEAD").Return(context.cherryPick)
 	env.On("runCommand", "git", []string{"-c", "core.quotepath=false", "-c", "color.status=false", "rev-parse", "--short", "HEAD"}).Return(context.currentCommit)
-	env.On("runCommand", "git", []string{"-c", "core.quotepath=false", "-c", "color.status=false", "rebase", "--show-current-patch"}).Return(context.rebase)
-	env.On("runCommand", "git", []string{"-c", "core.quotepath=false", "-c", "color.status=false", "symbolic-ref", "-q", "--short", "HEAD"}).Return(context.branchName)
 	env.On("runCommand", "git", []string{"-c", "core.quotepath=false", "-c", "color.status=false", "describe", "--tags", "--exact-match"}).Return(context.tagName)
 	env.On("runCommand", "git", []string{"-c", "core.quotepath=false", "-c", "color.status=false", "name-rev", "--name-only", "--exclude=tags/*", context.origin}).Return(context.origin)
 	env.On("runCommand", "git", []string{"-c", "core.quotepath=false", "-c", "color.status=false", "name-rev", "--name-only", "--exclude=tags/*", context.onto}).Return(context.onto)
@@ -78,7 +76,7 @@ func setupHEADContextEnv(context *detachedContext) environmentInfo {
 }
 
 func TestGetGitDetachedCommitHash(t *testing.T) {
-	want := "DETACHED:lalasha1"
+	want := "COMMIT:lalasha1"
 	context := &detachedContext{
 		currentCommit: "lalasha1",
 	}
@@ -86,7 +84,7 @@ func TestGetGitDetachedCommitHash(t *testing.T) {
 	g := &git{
 		env: env,
 	}
-	got := g.getGitHEADContext()
+	got := g.getGitHEADContext("")
 	assert.Equal(t, want, got)
 }
 
@@ -100,12 +98,12 @@ func TestGetGitHEADContextTagName(t *testing.T) {
 	g := &git{
 		env: env,
 	}
-	got := g.getGitHEADContext()
+	got := g.getGitHEADContext("")
 	assert.Equal(t, want, got)
 }
 
 func TestGetGitHEADContextRebaseMerge(t *testing.T) {
-	want := "REBASE:cool-feature-bro onto main (2/3) at whatever"
+	want := "REBASE:BRANCH:cool-feature-bro onto BRANCH:main (2/3) at COMMIT:whatever"
 	context := &detachedContext{
 		currentCommit: "whatever",
 		rebase:        "true",
@@ -119,12 +117,12 @@ func TestGetGitHEADContextRebaseMerge(t *testing.T) {
 	g := &git{
 		env: env,
 	}
-	got := g.getGitHEADContext()
+	got := g.getGitHEADContext("")
 	assert.Equal(t, want, got)
 }
 
 func TestGetGitHEADContextRebaseApply(t *testing.T) {
-	want := "REBASING:cool-feature-bro (2/3) at whatever"
+	want := "REBASING:BRANCH:cool-feature-bro (2/3) at COMMIT:whatever"
 	context := &detachedContext{
 		currentCommit: "whatever",
 		rebase:        "true",
@@ -137,12 +135,12 @@ func TestGetGitHEADContextRebaseApply(t *testing.T) {
 	g := &git{
 		env: env,
 	}
-	got := g.getGitHEADContext()
+	got := g.getGitHEADContext("")
 	assert.Equal(t, want, got)
 }
 
 func TestGetGitHEADContextRebaseUnknown(t *testing.T) {
-	want := "REBASE:UNKNOWN"
+	want := "COMMIT:whatever"
 	context := &detachedContext{
 		currentCommit: "whatever",
 		rebase:        "true",
@@ -151,12 +149,12 @@ func TestGetGitHEADContextRebaseUnknown(t *testing.T) {
 	g := &git{
 		env: env,
 	}
-	got := g.getGitHEADContext()
+	got := g.getGitHEADContext("")
 	assert.Equal(t, want, got)
 }
 
 func TestGetGitHEADContextCherryPickOnBranch(t *testing.T) {
-	want := "CHERRY PICK:pickme onto main"
+	want := "CHERRY PICK:pickme onto BRANCH:main"
 	context := &detachedContext{
 		currentCommit: "whatever",
 		branchName:    "main",
@@ -167,12 +165,12 @@ func TestGetGitHEADContextCherryPickOnBranch(t *testing.T) {
 	g := &git{
 		env: env,
 	}
-	got := g.getGitHEADContext()
+	got := g.getGitHEADContext("main")
 	assert.Equal(t, want, got)
 }
 
 func TestGetGitHEADContextCherryPickOnTag(t *testing.T) {
-	want := "CHERRY PICK:pickme onto v3.4.6"
+	want := "CHERRY PICK:pickme onto TAG:v3.4.6"
 	context := &detachedContext{
 		currentCommit: "whatever",
 		tagName:       "v3.4.6",
@@ -183,7 +181,7 @@ func TestGetGitHEADContextCherryPickOnTag(t *testing.T) {
 	g := &git{
 		env: env,
 	}
-	got := g.getGitHEADContext()
+	got := g.getGitHEADContext("")
 	assert.Equal(t, want, got)
 }