83 lines
2.3 KiB
Go
83 lines
2.3 KiB
Go
// Package config loads embedded defaults and optionally merges a user
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// overlay from ~/.config/archduino/overlay.yaml.
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package config
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import (
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_ "embed"
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"fmt"
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"os"
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"path/filepath"
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"gopkg.in/yaml.v3"
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)
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//go:embed defaults.yaml
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var defaultsYAML []byte
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// Config is the fully-resolved runtime configuration.
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type Config struct {
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Version int `yaml:"version"`
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ExtraPackages []string `yaml:"extra_packages"`
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DisabledModules []string `yaml:"disabled_modules"`
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ThemeOverrides map[string]string `yaml:"theme_overrides"`
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}
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const currentVersion = 1
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// Load returns defaults merged with the overlay at overlayPath (if present).
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// If overlayPath is "", the default location (~/.config/archduino/overlay.yaml)
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// is used. A missing overlay is not an error.
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func Load(overlayPath string) (Config, error) {
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var cfg Config
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if err := yaml.Unmarshal(defaultsYAML, &cfg); err != nil {
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return Config{}, fmt.Errorf("parse embedded defaults: %w", err)
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}
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if overlayPath == "" {
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home, err := os.UserHomeDir()
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if err != nil {
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return cfg, nil
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}
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overlayPath = filepath.Join(home, ".config", "archduino", "overlay.yaml")
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}
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data, err := os.ReadFile(overlayPath)
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if err != nil {
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if os.IsNotExist(err) {
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return cfg, nil
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}
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return Config{}, fmt.Errorf("read overlay %s: %w", overlayPath, err)
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}
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var overlay Config
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if err := yaml.Unmarshal(data, &overlay); err != nil {
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return Config{}, fmt.Errorf("parse overlay %s: %w", overlayPath, err)
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}
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if overlay.Version != 0 && overlay.Version != currentVersion {
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return Config{}, fmt.Errorf("overlay %s: unsupported version %d (want %d)", overlayPath, overlay.Version, currentVersion)
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}
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return merge(cfg, overlay), nil
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}
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func merge(base, over Config) Config {
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out := base
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if len(over.ExtraPackages) > 0 {
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out.ExtraPackages = append(append([]string{}, base.ExtraPackages...), over.ExtraPackages...)
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}
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if len(over.DisabledModules) > 0 {
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out.DisabledModules = append(append([]string{}, base.DisabledModules...), over.DisabledModules...)
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}
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if len(over.ThemeOverrides) > 0 {
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merged := make(map[string]string, len(base.ThemeOverrides)+len(over.ThemeOverrides))
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for k, v := range base.ThemeOverrides {
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merged[k] = v
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}
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for k, v := range over.ThemeOverrides {
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merged[k] = v
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}
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out.ThemeOverrides = merged
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}
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return out
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}
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