init

internal/config/constants.go

@@ -0,0 +1,27 @@
+package config
+
+const (
+	// DefaultConfigDir is the directory for global config
+	DefaultConfigDir = ".config/aevs"
+
+	// DefaultGlobalConfigFile is the global config filename
+	DefaultGlobalConfigFile = "config.yaml"
+
+	// DefaultProjectConfigFile is the project config filename
+	DefaultProjectConfigFile = "aevs.yaml"
+
+	// DefaultStorageType is the default storage backend
+	DefaultStorageType = "s3"
+
+	// DefaultRegion is the default AWS region
+	DefaultRegion = "us-east-1"
+
+	// DefaultEndpoint is the default S3 endpoint
+	DefaultEndpoint = "https://s3.amazonaws.com"
+
+	// ArchiveFileName is the name of the archive in storage
+	ArchiveFileName = "envs.tar.gz"
+
+	// MetadataFileName is the name of the metadata file in storage
+	MetadataFileName = "metadata.json"
+)

internal/config/global.go

@@ -0,0 +1,89 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+
+	"gopkg.in/yaml.v3"
+)
+
+// GlobalConfig represents ~/.config/aevs/config.yaml
+type GlobalConfig struct {
+	Storage StorageConfig `yaml:"storage"`
+}
+
+// StorageConfig holds S3-compatible storage credentials
+type StorageConfig struct {
+	Type      string `yaml:"type"`       // storage type: "s3"
+	Endpoint  string `yaml:"endpoint"`   // S3 endpoint URL
+	Region    string `yaml:"region"`     // AWS region (optional, default: us-east-1)
+	Bucket    string `yaml:"bucket"`     // S3 bucket name
+	AccessKey string `yaml:"access_key"` // AWS Access Key ID
+	SecretKey string `yaml:"secret_key"` // AWS Secret Access Key
+}
+
+// GlobalConfigPath returns the full path to the global config file
+func GlobalConfigPath() string {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return ""
+	}
+	return filepath.Join(home, DefaultConfigDir, DefaultGlobalConfigFile)
+}
+
+// GlobalConfigExists checks if the global config file exists
+func GlobalConfigExists() bool {
+	path := GlobalConfigPath()
+	if path == "" {
+		return false
+	}
+	_, err := os.Stat(path)
+	return err == nil
+}
+
+// LoadGlobalConfig loads the global config from ~/.config/aevs/config.yaml
+func LoadGlobalConfig() (*GlobalConfig, error) {
+	path := GlobalConfigPath()
+	if path == "" {
+		return nil, os.ErrNotExist
+	}
+
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	var cfg GlobalConfig
+	if err := yaml.Unmarshal(data, &cfg); err != nil {
+		return nil, err
+	}
+
+	return &cfg, nil
+}
+
+// SaveGlobalConfig saves the global config to ~/.config/aevs/config.yaml with 0600 permissions
+func SaveGlobalConfig(cfg *GlobalConfig) error {
+	path := GlobalConfigPath()
+	if path == "" {
+		return os.ErrNotExist
+	}
+
+	// Ensure directory exists
+	dir := filepath.Dir(path)
+	if err := os.MkdirAll(dir, 0700); err != nil {
+		return err
+	}
+
+	// Marshal to YAML
+	data, err := yaml.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+
+	// Write with secure permissions (0600)
+	if err := os.WriteFile(path, data, 0600); err != nil {
+		return err
+	}
+
+	return nil
+}

internal/config/project.go

@@ -0,0 +1,72 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"regexp"
+
+	"gopkg.in/yaml.v3"
+)
+
+// ProjectConfig represents ./aevs.yaml
+type ProjectConfig struct {
+	Project string   `yaml:"project"` // unique project identifier
+	Files   []string `yaml:"files"`   // list of file paths to sync
+}
+
+// projectNameRegex validates project names (only a-z, 0-9, -, _)
+var projectNameRegex = regexp.MustCompile(`^[a-z0-9_-]+$`)
+
+// LoadProjectConfig loads a project config from the specified path
+func LoadProjectConfig(path string) (*ProjectConfig, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	var cfg ProjectConfig
+	if err := yaml.Unmarshal(data, &cfg); err != nil {
+		return nil, err
+	}
+
+	// Validate project name
+	if err := ValidateProjectName(cfg.Project); err != nil {
+		return nil, err
+	}
+
+	return &cfg, nil
+}
+
+// SaveProjectConfig saves a project config to the specified path
+func SaveProjectConfig(path string, cfg *ProjectConfig) error {
+	// Validate project name before saving
+	if err := ValidateProjectName(cfg.Project); err != nil {
+		return err
+	}
+
+	// Marshal to YAML
+	data, err := yaml.Marshal(cfg)
+	if err != nil {
+		return err
+	}
+
+	// Write file
+	if err := os.WriteFile(path, data, 0644); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// ValidateProjectName checks if the project name contains only a-z, 0-9, -, _
+func ValidateProjectName(name string) error {
+	if name == "" {
+		return fmt.Errorf("project name cannot be empty")
+	}
+
+	if !projectNameRegex.MatchString(name) {
+		return fmt.Errorf("invalid project name %q; use only a-z, 0-9, -, _", name)
+	}
+
+	return nil
+}