fix(identity): drop --global from config reads to support [include]

Using --global prevented git from resolving [include] directives in the
global config file, so identities stored in included files were invisible.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jdevera

internal/identity/identity_test.go

@@ -296,3 +296,41 @@ func TestProfileWithTestRepo(t *testing.T) {
 	// primarily works with global config, but this demonstrates the
 	// git config mechanics work correctly.
 }
+
+func TestIncludedConfigFile(t *testing.T) {
+	tmpDir := t.TempDir()
+	setEnv(t, "HOME", tmpDir)
+
+	// Write identity config to a separate file
+	identitiesFile := filepath.Join(tmpDir, ".git-identities")
+	identitiesContent := `[identity "included"]
+	email = included@example.com
+	sshkey = ~/.ssh/id_included
+	user = Included User
+	ghuser = includeduser
+`
+	require.NoError(t, os.WriteFile(identitiesFile, []byte(identitiesContent), 0o600))
+
+	// Main gitconfig includes the separate file
+	gitconfig := filepath.Join(tmpDir, ".gitconfig")
+	gitconfigContent := "[include]\n\tpath = " + identitiesFile + "\n"
+	require.NoError(t, os.WriteFile(gitconfig, []byte(gitconfigContent), 0o600))
+
+	// List should find the included profile
+	names, err := List()
+	require.NoError(t, err)
+	assert.Contains(t, names, "included")
+
+	// Get should read all fields
+	p, err := Get("included")
+	require.NoError(t, err)
+	assert.Equal(t, "included@example.com", p.Email)
+	assert.Equal(t, "~/.ssh/id_included", p.SSHKey)
+	assert.Equal(t, "Included User", p.User)
+	assert.Equal(t, "includeduser", p.GHUser)
+
+	// GetSourceFile should point to the included file
+	source, err := GetSourceFile("included")
+	require.NoError(t, err)
+	assert.Equal(t, identitiesFile, source)
+}

internal/identity/profile.go

@@ -24,7 +24,7 @@ var profileKeys = []string{"sshkey", "email", "user", "ghuser"}
 
 // List returns all profile names from git config.
 func List() ([]string, error) {
-	cmd := exec.Command("git", "config", "--global", "--get-regexp", `^identity\.`)
+	cmd := exec.Command("git", "config", "--get-regexp", `^identity\.`)
 	out, err := cmd.Output()
 	if err != nil {
 		// No matches is not an error - just empty
@@ -90,7 +90,7 @@ func Get(name string) (*Profile, error) {
 // getConfigValue reads a single config value.
 func getConfigValue(profile, key string) (string, error) {
 	configKey := fmt.Sprintf("identity.%s.%s", profile, key)
-	cmd := exec.Command("git", "config", "--global", "--get", configKey)
+	cmd := exec.Command("git", "config", "--get", configKey)
 	out, err := cmd.Output()
 	if err != nil {
 		return "", err
@@ -103,7 +103,7 @@ func GetSourceFile(name string) (string, error) {
 	// Try to find any key for this profile
 	for _, key := range profileKeys {
 		configKey := fmt.Sprintf("identity.%s.%s", name, key)
-		cmd := exec.Command("git", "config", "--global", "--show-origin", "--get", configKey)
+		cmd := exec.Command("git", "config", "--show-origin", "--get", configKey)
 		out, err := cmd.Output()
 		if err != nil {
 			continue
@@ -127,7 +127,7 @@ func GetAllSourceFiles(name string) ([]string, error) {
 
 	for _, key := range profileKeys {
 		configKey := fmt.Sprintf("identity.%s.%s", name, key)
-		cmd := exec.Command("git", "config", "--global", "--show-origin", "--get-all", configKey)
+		cmd := exec.Command("git", "config", "--show-origin", "--get-all", configKey)
 		out, err := cmd.Output()
 		if err != nil {
 			continue