Prepare for 1.0 release

- Fix Go version to 1.24.4 in go.mod
- Add version management with version.go
- Add --version flag to CLI tool
- Remove deprecated LoadFromFile and LoadFromReader methods
- Update tests to use new API
- Create TODO.md for future improvements
- Update README with Go version requirement

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -751,7 +751,7 @@ The `FILE` resolver can read any file accessible to the process:
 
 ## Requirements
 
-- Go 1.18 or later
+- Go 1.24.4 or later
 - Valid YAML syntax in configuration files
 - Appropriate credentials for cloud providers (AWS, GCP, Azure)
 - Network access for remote resolvers (Vault, Consul, etcd)

TODO.md

@@ -0,0 +1,74 @@
+# TODO for smartconfig
+
+This file tracks improvements and features planned for future releases.
+
+## Testing Improvements
+
+### Concurrency Tests
+- Add comprehensive concurrent access tests for Config struct
+- Test race conditions with multiple goroutines accessing/modifying config
+- Benchmark concurrent access patterns
+
+### Security Tests
+- Add tests for malicious input handling in EXEC resolver
+- Test various command injection attempts
+- Add tests for FILE resolver with symlinks and directory traversal attempts
+
+### Performance Tests
+- Add comprehensive benchmarks for all resolver types
+- Benchmark large configuration files (1MB+, 10MB+, 100MB+)
+- Benchmark nested interpolation performance
+- Compare performance with other config libraries
+
+### Integration Tests
+- Add integration tests with mocked cloud services
+- Test cloud resolver authentication failures and retry scenarios
+- Test timeout behavior for all external resolvers
+
+## Documentation
+
+### Examples
+- Add godoc examples for all major functions
+- Create example applications demonstrating common use cases
+- Add examples for custom resolver implementation
+
+### Guides
+- Write troubleshooting guide for common issues
+- Create migration guide from popular config libraries (Viper, koanf)
+- Write security best practices guide
+- Add performance tuning guide
+
+## Future Features
+
+### Caching Layer (if needed)
+- Consider adding optional caching for resolver results
+- Implement TTL-based cache invalidation
+- Add cache statistics and monitoring
+
+### Configuration Validation
+- Add optional schema validation support
+- Implement type-safe configuration structs
+- Add validation rules for common patterns
+
+### Watch/Reload Support (if needed)
+- Add file watching for configuration changes
+- Implement hot reload capability
+- Add change notification callbacks
+
+### Enhanced Error Handling
+- Create typed errors for better error handling
+- Add error context with resolution path
+- Implement error aggregation for multiple failures
+
+## Build and Release
+
+### Release Automation
+- Set up goreleaser configuration
+- Automate changelog generation
+- Create release binaries for multiple platforms
+- Set up GitHub Actions for CI/CD
+
+### Distribution
+- Publish to common package managers (Homebrew, apt, etc.)
+- Create Docker images with the CLI tool
+- Set up automated security scanning

cmd/smartconfig/main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"encoding/json"
 	"flag"
+	"fmt"
 	"log"
 	"os"
 
@@ -12,9 +13,19 @@ import (
 
 func main() {
 	var jsonOutput bool
+	var showVersion bool
 	flag.BoolVar(&jsonOutput, "json", false, "Output as formatted JSON instead of YAML")
+	flag.BoolVar(&showVersion, "version", false, "Show version information")
 	flag.Parse()
 
+	if showVersion {
+		fmt.Printf("smartconfig %s\n", smartconfig.Version)
+		if smartconfig.GitCommit != "unknown" {
+			fmt.Printf("commit: %s\n", smartconfig.GitCommit)
+		}
+		os.Exit(0)
+	}
+
 	// Read from stdin
 	config, err := smartconfig.NewFromReader(os.Stdin)
 	if err != nil {

smartconfig.go

@@ -122,48 +122,6 @@ func (c *Config) RegisterResolver(name string, resolver Resolver) {
 	c.resolvers[name] = resolver
 }
 
-// LoadFromFile loads configuration from a YAML file at the specified path.
-// DEPRECATED: Use NewFromConfigPath instead for cleaner API.
-func (c *Config) LoadFromFile(path string) error {
-	file, err := os.Open(path)
-	if err != nil {
-		return fmt.Errorf("failed to open config file: %w", err)
-	}
-	defer func() {
-		_ = file.Close()
-	}()
-
-	return c.LoadFromReader(file)
-}
-
-// LoadFromReader loads configuration from an io.Reader containing YAML data.
-// DEPRECATED: Use NewFromReader instead for cleaner API.
-func (c *Config) LoadFromReader(reader io.Reader) error {
-	data, err := io.ReadAll(reader)
-	if err != nil {
-		return fmt.Errorf("failed to read config: %w", err)
-	}
-
-	// Parse YAML first
-	if err := yaml.Unmarshal(data, &c.data); err != nil {
-		return fmt.Errorf("failed to parse YAML: %w", err)
-	}
-
-	// Walk and interpolate the parsed structure
-	interpolated, err := c.walkAndInterpolate(c.data)
-	if err != nil {
-		return fmt.Errorf("failed to interpolate config: %w", err)
-	}
-	c.data = interpolated.(map[string]interface{})
-
-	// Handle environment variable injection
-	if err := c.injectEnvironment(); err != nil {
-		return fmt.Errorf("failed to inject environment variables: %w", err)
-	}
-
-	return nil
-}
-
 func (c *Config) injectEnvironment() error {
 	envData, ok := c.data["env"]
 	if !ok {

smartconfig_test.go

@@ -76,9 +76,8 @@ func TestInterpolateBasic(t *testing.T) {
 	_ = os.Setenv("BASIC", "value")
 	defer func() { _ = os.Unsetenv("BASIC") }()
 
-	config := New()
 	content := "test: ${ENV:BASIC}"
-	err := config.LoadFromReader(strings.NewReader(content))
+	config, err := NewFromReader(strings.NewReader(content))
 	if err != nil {
 		t.Fatalf("Failed to load config: %v", err)
 	}
@@ -198,9 +197,8 @@ func TestSimpleNestedInterpolation(t *testing.T) {
 		_ = os.Unsetenv("FOO_BAR")
 	}()
 
-	config := New()
 	content := "test: ${ENV:FOO_${ENV:SUFFIX}}"
-	err := config.LoadFromReader(strings.NewReader(content))
+	config, err := NewFromReader(strings.NewReader(content))
 	if err != nil {
 		t.Fatalf("Failed to load config: %v", err)
 	}
@@ -227,8 +225,7 @@ func TestConfigInterpolation(t *testing.T) {
 		_ = os.Unsetenv("NESTED_VALUE")
 	}()
 
-	config := New()
+	config, err := NewFromConfigPath("./test/config.yaml")
-	err := config.LoadFromFile("./test/config.yaml")
 	if err != nil {
 		t.Fatalf("Failed to load config: %v", err)
 	}
@@ -286,8 +283,6 @@ func TestConfigInterpolation(t *testing.T) {
 }
 
 func TestRecursionLimit(t *testing.T) {
-	config := New()
-
 	// Create a deeply nested interpolation that hits the recursion limit
 	// This has 4 levels, but our max is 3
 	content := "value: ${ENV:LEVEL1_${ENV:LEVEL2_${ENV:LEVEL3_${ENV:LEVEL4}}}}"
@@ -311,7 +306,7 @@ func TestRecursionLimit(t *testing.T) {
 		_ = os.Unsetenv("LEVEL1_depth2value")
 	}()
 
-	err := config.LoadFromReader(strings.NewReader(content))
+	config, err := NewFromReader(strings.NewReader(content))
 	if err != nil {
 		t.Fatalf("Failed to load config: %v", err)
 	}
@@ -346,11 +341,10 @@ func TestInvalidResolverFormat(t *testing.T) {
 }
 
 func TestUnknownResolver(t *testing.T) {
-	config := New()
 	content := "value: ${UNKNOWN:test}"
 
 	// Unknown resolver should cause an error
-	err := config.LoadFromReader(strings.NewReader(content))
+	_, err := NewFromReader(strings.NewReader(content))
 	if err == nil {
 		t.Fatal("Expected error for unknown resolver, but got none")
 	}

version.go

@@ -0,0 +1,7 @@
+package smartconfig
+
+// Version is the current version of smartconfig
+const Version = "1.0.0"
+
+// GitCommit is the git commit hash (set at build time with -ldflags)
+var GitCommit = "unknown"