feat: handle local directory arguments in compile command

cmd/gh-aw/main.go

@@ -253,6 +253,7 @@ Examples:
   ` + string(constants.CLIExtensionPrefix) + ` compile ci-doctor          # Compile a specific workflow
   ` + string(constants.CLIExtensionPrefix) + ` compile ci-doctor daily-plan  # Compile multiple workflows
   ` + string(constants.CLIExtensionPrefix) + ` compile workflow.md        # Compile by file path
+  ` + string(constants.CLIExtensionPrefix) + ` compile .github/workflows  # Compile all workflows in a directory
   ` + string(constants.CLIExtensionPrefix) + ` compile --dir custom/workflows  # Compile from custom directory
   ` + string(constants.CLIExtensionPrefix) + ` compile --watch ci-doctor     # Watch and auto-compile
   ` + string(constants.CLIExtensionPrefix) + ` compile --trial --logical-repo owner/repo  # Compile for trial mode

pkg/cli/compile_args.go

@@ -0,0 +1,84 @@
+// This file provides argument preprocessing for the compile command.
+//
+// It handles expansion of local directory paths into their constituent
+// workflow .md files so that the rest of the compilation pipeline only
+// needs to deal with concrete file paths.
+//
+// # Key Functions
+//
+//   - resolveCompileArgs() - Expand a list of compile arguments
+//   - expandCompileArg()   - Expand a single argument (directory or file)
+//   - expandDirectoryArg() - Return all .md workflow files inside a directory
+
+package cli
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/github/gh-aw/pkg/console"
+	"github.com/github/gh-aw/pkg/logger"
+)
+
+var compileArgsLog = logger.New("cli:compile_args")
+
+// resolveCompileArgs preprocesses compile command arguments to handle
+// local directory paths. When an argument is a directory it is expanded
+// to all .md workflow files in that directory.
+func resolveCompileArgs(args []string, verbose bool) ([]string, error) {
+	if len(args) == 0 {
+		return args, nil
+	}
+
+	var result []string
+	for _, arg := range args {
+		expanded, err := expandCompileArg(arg, verbose)
+		if err != nil {
+			return nil, err
+		}
+		result = append(result, expanded...)
+	}
+	return result, nil
+}
+
+// expandCompileArg expands a single compile argument:
+//   - Local directory paths: expand to all .md files in that directory
+//   - Everything else: return as-is for the existing resolver to handle
+func expandCompileArg(arg string, verbose bool) ([]string, error) {
+	compileArgsLog.Printf("Processing compile argument: %s", arg)
+
+	// Handle local directory paths
+	info, err := os.Stat(arg)
+	if err == nil && info.IsDir() {
+		return expandDirectoryArg(arg, verbose)
+	}
+
+	// Return as-is (regular file path or workflow name)
+	return []string{arg}, nil
+}
+
+// expandDirectoryArg expands a directory path to all .md workflow files in it.
+func expandDirectoryArg(dirPath string, verbose bool) ([]string, error) {
+	compileArgsLog.Printf("Expanding directory argument: %s", dirPath)
+
+	if verbose {
+		fmt.Fprintln(os.Stderr, console.FormatInfoMessage("Compiling all workflows in directory: "+dirPath))
+	}
+
+	mdFiles, err := getMarkdownWorkflowFiles(dirPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to find workflow files in %s: %w", dirPath, err)
+	}
+
+	mdFiles, err = filterMarkdownFilesWithFrontmatter(mdFiles)
+	if err != nil {
+		return nil, fmt.Errorf("failed to filter workflow files in %s: %w", dirPath, err)
+	}
+
+	if len(mdFiles) == 0 {
+		return nil, fmt.Errorf("no workflow markdown files found in %s (workflow files must start with a frontmatter opener on the first line)", dirPath)
+	}
+
+	compileArgsLog.Printf("Found %d workflow files in directory %s", len(mdFiles), dirPath)
+	return mdFiles, nil
+}

pkg/cli/compile_args_test.go

@@ -0,0 +1,84 @@
+//go:build !integration
+
+package cli
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestExpandCompileArg_RegularFile(t *testing.T) {
+	// A plain workflow name should be returned as-is
+	result, err := expandCompileArg("my-workflow", false)
+	require.NoError(t, err, "plain workflow name should not error")
+	assert.Equal(t, []string{"my-workflow"}, result, "plain workflow name should be returned unchanged")
+}
+
+func TestExpandCompileArg_FilePath(t *testing.T) {
+	// A non-existent file path should be returned as-is
+	result, err := expandCompileArg(".github/workflows/my-workflow.md", false)
+	require.NoError(t, err, "non-existent file path should not error")
+	assert.Equal(t, []string{".github/workflows/my-workflow.md"}, result, "file path should be returned unchanged")
+}
+
+func TestExpandCompileArg_LocalDirectory(t *testing.T) {
+	// Create a temp directory with workflow files
+	tmpDir := t.TempDir()
+	writeWorkflowFile(t, tmpDir, "workflow-a.md")
+	writeWorkflowFile(t, tmpDir, "workflow-b.md")
+
+	result, err := expandCompileArg(tmpDir, false)
+	require.NoError(t, err, "local directory should expand without error")
+	assert.Len(t, result, 2, "should return all .md files in the directory")
+}
+
+func TestExpandCompileArg_LocalDirectory_Empty(t *testing.T) {
+	// Directory with no .md files should error
+	tmpDir := t.TempDir()
+	_, err := expandCompileArg(tmpDir, false)
+	assert.Error(t, err, "empty directory should return an error")
+	assert.Contains(t, err.Error(), "no workflow markdown files found", "error should mention no workflow files")
+}
+
+func TestExpandCompileArg_URLPassthrough(t *testing.T) {
+	// URLs should be returned as-is (not processed)
+	url := "https://github.com/org/repo/tree/main/.github/workflows"
+	result, err := expandCompileArg(url, false)
+	require.NoError(t, err, "URL should not error")
+	assert.Equal(t, []string{url}, result, "URL should be returned unchanged")
+}
+
+func TestResolveCompileArgs_Empty(t *testing.T) {
+	result, err := resolveCompileArgs(nil, false)
+	require.NoError(t, err)
+	assert.Empty(t, result)
+}
+
+func TestResolveCompileArgs_Mixed(t *testing.T) {
+	// Create a temp directory with a workflow file
+	tmpDir := t.TempDir()
+	writeWorkflowFile(t, tmpDir, "workflow-a.md")
+
+	// Mix: a plain workflow name + a directory
+	result, err := resolveCompileArgs([]string{"plain-workflow", tmpDir}, false)
+	require.NoError(t, err, "mixed args should expand without error")
+	require.Len(t, result, 2, "should have one plain name + one expanded file")
+
+	// The plain workflow name should be unchanged
+	assert.Equal(t, "plain-workflow", result[0], "first arg should be unchanged")
+	// The directory arg should be the single .md file in tmpDir
+	assert.True(t, strings.HasSuffix(result[1], "workflow-a.md"), "second arg should be the expanded .md file")
+}
+
+// writeWorkflowFile creates a minimal workflow .md file in dir with the given name.
+func writeWorkflowFile(t *testing.T, dir, name string) {
+	t.Helper()
+	content := "---\non: push\n---\n\n# Test Workflow\n"
+	require.NoError(t, os.WriteFile(filepath.Join(dir, name), []byte(content), 0644),
+		"write workflow file %s", name)
+}

pkg/cli/compile_orchestrator.go

@@ -57,6 +57,15 @@ func CompileWorkflows(ctx context.Context, config CompileConfig) ([]*workflow.Wo
 		compileOrchestratorLog.Printf("Using custom workflow directory: %s", workflowDir)
 	}
 
+	// Preprocess args: expand directory paths and GitHub URLs to constituent workflow files
+	if len(config.MarkdownFiles) > 0 {
+		expandedFiles, err := resolveCompileArgs(config.MarkdownFiles, config.Verbose)
+		if err != nil {
+			return nil, err
+		}
+		config.MarkdownFiles = expandedFiles
+	}
+
 	// Create and configure compiler
 	compiler := createAndConfigureCompiler(config)