Add --init flag for automatic config generation

cmd/promptext/main.go

@@ -7,6 +7,7 @@ import (
 	"path/filepath"
 	"strings"
 
+	"github.com/1broseidon/promptext/internal/initializer"
 	"github.com/1broseidon/promptext/internal/processor"
 	"github.com/1broseidon/promptext/internal/update"
 	"github.com/spf13/pflag"
@@ -77,6 +78,11 @@ UPDATE OPTIONS:
         --update             Update promptext to the latest version from GitHub
         --check-update       Check if a new version is available without updating
 
+INITIALIZATION OPTIONS:
+        --init               Initialize a new .promptext.yml config file with smart defaults
+                             Detects project type and suggests framework-specific settings
+        --force              Force overwrite of existing config (use with --init)
+
 EXAMPLES:
     # Basic usage - process current directory, copy to clipboard
     prx
@@ -132,6 +138,10 @@ EXAMPLES:
     prx --check-update                         # Check only
     prx --update                               # Update to latest version
 
+    # Initialize config file with smart defaults based on project type
+    prx --init                                 # Interactive mode
+    prx --init --force                         # Overwrite existing config
+
 CONFIGURATION:
     Create a .promptext.yml file in your project root for persistent settings:
 
@@ -171,6 +181,10 @@ func main() {
 	checkUpdate := pflag.Bool("check-update", false, "Check if a new version is available")
 	doUpdate := pflag.Bool("update", false, "Update to the latest version from GitHub")
 
+	// Initialization options
+	initConfig := pflag.Bool("init", false, "Initialize a new .promptext.yml config file with smart defaults")
+	forceInit := pflag.Bool("force", false, "Force overwrite of existing config (use with --init)")
+
 	// Input options
 	dirPath := pflag.StringP("directory", "d", ".", "Directory to process (default: current directory)")
 	extension := pflag.StringP("extension", "e", "", "File extensions to include (comma-separated, e.g., .go,.js,.py)")
@@ -235,6 +249,24 @@ func main() {
 		os.Exit(0)
 	}
 
+	// Handle initialization flag
+	if *initConfig {
+		// Get absolute path
+		absPath, err := filepath.Abs(*dirPath)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error resolving directory path: %v\n", err)
+			os.Exit(1)
+		}
+
+		// Create and run initializer
+		init := initializer.NewInitializer(absPath, *forceInit, *quiet)
+		if err := init.Run(); err != nil {
+			fmt.Fprintf(os.Stderr, "Error initializing config: %v\n", err)
+			os.Exit(1)
+		}
+		os.Exit(0)
+	}
+
 	// Automatic update check (non-blocking, silently fails on network issues)
 	// Only runs during normal operation, not for update/version/help commands
 	go update.CheckAndNotifyUpdate(version)

internal/initializer/detector.go

@@ -0,0 +1,247 @@
+package initializer
+
+import (
+	"os"
+	"path/filepath"
+)
+
+// ProjectType represents a detected project framework or language
+type ProjectType struct {
+	Name        string
+	Description string
+	Priority    int // Higher priority types are listed first
+}
+
+// DetectionResult contains all detected project types
+type DetectionResult struct {
+	ProjectTypes []ProjectType
+	RootPath     string
+}
+
+// Detector interface for project type detection
+type Detector interface {
+	Detect(rootPath string) ([]ProjectType, error)
+}
+
+// FileDetector detects project types based on file presence
+type FileDetector struct{}
+
+// NewFileDetector creates a new file-based detector
+func NewFileDetector() *FileDetector {
+	return &FileDetector{}
+}
+
+// Detect scans the directory for known project indicators
+func (d *FileDetector) Detect(rootPath string) ([]ProjectType, error) {
+	var detected []ProjectType
+
+	// Define detection rules: file -> project type
+	detectionRules := []struct {
+		files       []string // Any of these files indicates this project type
+		projectType ProjectType
+	}{
+		// JavaScript/TypeScript frameworks
+		{
+			files: []string{"next.config.js", "next.config.mjs", "next.config.ts"},
+			projectType: ProjectType{
+				Name:        "nextjs",
+				Description: "Next.js",
+				Priority:    100,
+			},
+		},
+		{
+			files: []string{"nuxt.config.js", "nuxt.config.ts"},
+			projectType: ProjectType{
+				Name:        "nuxt",
+				Description: "Nuxt.js",
+				Priority:    100,
+			},
+		},
+		{
+			files: []string{"vite.config.js", "vite.config.ts"},
+			projectType: ProjectType{
+				Name:        "vite",
+				Description: "Vite",
+				Priority:    90,
+			},
+		},
+		{
+			files: []string{"vue.config.js"},
+			projectType: ProjectType{
+				Name:        "vue",
+				Description: "Vue.js",
+				Priority:    90,
+			},
+		},
+		{
+			files: []string{"angular.json"},
+			projectType: ProjectType{
+				Name:        "angular",
+				Description: "Angular",
+				Priority:    100,
+			},
+		},
+		{
+			files: []string{"svelte.config.js"},
+			projectType: ProjectType{
+				Name:        "svelte",
+				Description: "Svelte",
+				Priority:    90,
+			},
+		},
+
+		// Go
+		{
+			files: []string{"go.mod"},
+			projectType: ProjectType{
+				Name:        "go",
+				Description: "Go",
+				Priority:    80,
+			},
+		},
+
+		// Python frameworks
+		{
+			files: []string{"manage.py", "django"},
+			projectType: ProjectType{
+				Name:        "django",
+				Description: "Django",
+				Priority:    100,
+			},
+		},
+		{
+			files: []string{"app.py", "wsgi.py"},
+			projectType: ProjectType{
+				Name:        "flask",
+				Description: "Flask",
+				Priority:    90,
+			},
+		},
+		{
+			files: []string{"pyproject.toml", "setup.py", "requirements.txt"},
+			projectType: ProjectType{
+				Name:        "python",
+				Description: "Python",
+				Priority:    70,
+			},
+		},
+
+		// Rust
+		{
+			files: []string{"Cargo.toml"},
+			projectType: ProjectType{
+				Name:        "rust",
+				Description: "Rust",
+				Priority:    80,
+			},
+		},
+
+		// Java/Kotlin
+		{
+			files: []string{"pom.xml"},
+			projectType: ProjectType{
+				Name:        "maven",
+				Description: "Maven (Java)",
+				Priority:    80,
+			},
+		},
+		{
+			files: []string{"build.gradle", "build.gradle.kts"},
+			projectType: ProjectType{
+				Name:        "gradle",
+				Description: "Gradle (Java/Kotlin)",
+				Priority:    80,
+			},
+		},
+
+		// Ruby
+		{
+			files: []string{"Gemfile", "config.ru"},
+			projectType: ProjectType{
+				Name:        "ruby",
+				Description: "Ruby/Rails",
+				Priority:    80,
+			},
+		},
+
+		// PHP
+		{
+			files: []string{"composer.json"},
+			projectType: ProjectType{
+				Name:        "php",
+				Description: "PHP",
+				Priority:    70,
+			},
+		},
+		{
+			files: []string{"artisan"},
+			projectType: ProjectType{
+				Name:        "laravel",
+				Description: "Laravel",
+				Priority:    90,
+			},
+		},
+
+		// .NET
+		{
+			files: []string{"*.csproj", "*.fsproj", "*.vbproj"},
+			projectType: ProjectType{
+				Name:        "dotnet",
+				Description: ".NET",
+				Priority:    80,
+			},
+		},
+
+		// Node.js (generic - lowest priority)
+		{
+			files: []string{"package.json"},
+			projectType: ProjectType{
+				Name:        "node",
+				Description: "Node.js",
+				Priority:    60,
+			},
+		},
+	}
+
+	// Check each detection rule
+	for _, rule := range detectionRules {
+		for _, file := range rule.files {
+			// Handle wildcards
+			if filepath.Base(file) != file && (file[0] == '*' || file[len(file)-1] == '*') {
+				matches, err := filepath.Glob(filepath.Join(rootPath, file))
+				if err == nil && len(matches) > 0 {
+					detected = append(detected, rule.projectType)
+					break
+				}
+			} else {
+				// Regular file check
+				filePath := filepath.Join(rootPath, file)
+				if _, err := os.Stat(filePath); err == nil {
+					detected = append(detected, rule.projectType)
+					break
+				}
+			}
+		}
+	}
+
+	// Sort by priority (highest first)
+	for i := 0; i < len(detected); i++ {
+		for j := i + 1; j < len(detected); j++ {
+			if detected[j].Priority > detected[i].Priority {
+				detected[i], detected[j] = detected[j], detected[i]
+			}
+		}
+	}
+
+	// Deduplicate
+	seen := make(map[string]bool)
+	var unique []ProjectType
+	for _, pt := range detected {
+		if !seen[pt.Name] {
+			seen[pt.Name] = true
+			unique = append(unique, pt)
+		}
+	}
+
+	return unique, nil
+}