Do not expand aliases which are in-built git and hub commands

commands/runner.go

@@ -90,7 +90,9 @@ func (r *Runner) Execute() ExecError {
 	utils.Check(err)
 
 	git.GlobalFlags = args.GlobalFlags // preserve git global flags
-	expandAlias(args)
+	if !isBuiltInHubCommand(args.Command) {
+		expandAlias(args)
+	}
 
 	cmd := r.Lookup(args.Command)
 	if cmd != nil && cmd.Runnable() {
@@ -163,7 +165,8 @@ func executeCommands(cmds []*cmd.Cmd, execFinal bool) error {
 func expandAlias(args *Args) {
 	cmd := args.Command
 	expandedCmd, err := git.Alias(cmd)
-	if err == nil && expandedCmd != "" {
+
+	if err == nil && expandedCmd != "" && !git.IsBuiltInGitCommand(cmd) {
 		words, e := splitAliasCmd(expandedCmd)
 		if e == nil {
 			args.Command = words[0]
@@ -172,6 +175,15 @@ func expandAlias(args *Args) {
 	}
 }
 
+func isBuiltInHubCommand(command string) bool {
+	for hubCommand, _ := range CmdRunner.All() {
+		if hubCommand == command {
+			return true
+		}
+	}
+	return false
+}
+
 func splitAliasCmd(cmd string) ([]string, error) {
 	if cmd == "" {
 		return nil, fmt.Errorf("alias can't be empty")

features/ci_status.feature

@@ -96,3 +96,11 @@ Feature: hub ci-status
     Given the remote commit state of "git.my.org/michiels/pencilbox" "the_sha" is "success"
     When I successfully run `hub ci-status the_sha`
     Then the output should contain exactly "success\n"
+
+  Scenario: If alias named ci-status exists, it should not be expanded.
+    Given there is a commit named "the_sha"
+    Given the remote commit state of "michiels/pencilbox" "the_sha" is "success"
+    When I successfully run `git config --global alias.ci-status "ci-status -v"`
+    When I run `hub ci-status the_sha`
+    Then the output should contain exactly "success\n"
+    And the exit status should be 0

features/git_compatibility.feature

@@ -0,0 +1,7 @@
+Feature: git-hub compatibility
+  Scenario: If alias named branch exists, it should not be expanded.
+    Given I am in "git://github.com/rtomayko/ronn.git" git repo
+    And the default branch for "origin" is "master"
+    When I successfully run `git config --global alias.branch "branch -a"`
+    When I run `hub branch`
+    Then the stdout should contain exactly "* master\n"

git/git.go

@@ -305,6 +305,7 @@ func LocalBranches() ([]string, error) {
 	if err == nil {
 		for i, line := range lines {
 			lines[i] = strings.TrimPrefix(line, "* ")
+			lines[i] = strings.TrimPrefix(lines[i], "  ")
 		}
 	}
 	return lines, err
@@ -315,8 +316,7 @@ func gitOutput(input ...string) (outputs []string, err error) {
 
 	out, err := cmd.CombinedOutput()
 	for _, line := range strings.Split(out, "\n") {
-		line = strings.TrimSpace(line)
-		if line != "" {
+		if strings.TrimSpace(line) != "" {
 			outputs = append(outputs, string(line))
 		}
 	}
@@ -337,3 +337,20 @@ func gitCmd(args ...string) *cmd.Cmd {
 
 	return cmd
 }
+
+func IsBuiltInGitCommand(command string) bool {
+	helpCommandOutput, err := gitOutput("help", "-a")
+	if err != nil {
+		return false
+	}
+	for _, helpCommandOutputLine := range helpCommandOutput {
+		if strings.HasPrefix(helpCommandOutputLine, "  ") {
+			for _, gitCommand := range strings.Split(helpCommandOutputLine, " ") {
+				if gitCommand == command {
+					return true
+				}
+			}
+		}
+	}
+	return false
+}