1package config
  2
  3import (
  4	"cmp"
  5	"context"
  6	"encoding/json"
  7	"fmt"
  8	"io"
  9	"log/slog"
 10	"maps"
 11	"os"
 12	"os/exec"
 13	"path/filepath"
 14	"runtime"
 15	"slices"
 16	"strconv"
 17	"strings"
 18	"testing"
 19
 20	"git.secluded.site/crush/internal/agent/hyper"
 21	"git.secluded.site/crush/internal/csync"
 22	"git.secluded.site/crush/internal/env"
 23	"git.secluded.site/crush/internal/fsext"
 24	"git.secluded.site/crush/internal/home"
 25	"git.secluded.site/crush/internal/log"
 26	"github.com/charmbracelet/catwalk/pkg/catwalk"
 27	powernapConfig "github.com/charmbracelet/x/powernap/pkg/config"
 28)
 29
 30const defaultCatwalkURL = "https://catwalk.charm.sh"
 31
 32// LoadReader config via io.Reader.
 33func LoadReader(fd io.Reader) (*Config, error) {
 34	data, err := io.ReadAll(fd)
 35	if err != nil {
 36		return nil, err
 37	}
 38
 39	var config Config
 40	err = json.Unmarshal(data, &config)
 41	if err != nil {
 42		return nil, err
 43	}
 44	return &config, err
 45}
 46
 47// Load loads the configuration from the default paths.
 48func Load(workingDir, dataDir string, debug bool) (*Config, error) {
 49	configPaths := lookupConfigs(workingDir)
 50
 51	cfg, err := loadFromConfigPaths(configPaths)
 52	if err != nil {
 53		return nil, fmt.Errorf("failed to load config from paths %v: %w", configPaths, err)
 54	}
 55
 56	cfg.dataConfigDir = GlobalConfigData()
 57
 58	cfg.setDefaults(workingDir, dataDir)
 59
 60	if debug {
 61		cfg.Options.Debug = true
 62	}
 63
 64	// Setup logs
 65	log.Setup(
 66		filepath.Join(cfg.Options.DataDirectory, "logs", fmt.Sprintf("%s.log", appName)),
 67		cfg.Options.Debug,
 68	)
 69
 70	if !isInsideWorktree() {
 71		const depth = 2
 72		const items = 100
 73		slog.Warn("No git repository detected in working directory, will limit file walk operations", "depth", depth, "items", items)
 74		assignIfNil(&cfg.Tools.Ls.MaxDepth, depth)
 75		assignIfNil(&cfg.Tools.Ls.MaxItems, items)
 76		assignIfNil(&cfg.Options.TUI.Completions.MaxDepth, depth)
 77		assignIfNil(&cfg.Options.TUI.Completions.MaxItems, items)
 78	}
 79
 80	// Load known providers, this loads the config from catwalk
 81	providers, err := Providers(cfg)
 82	if err != nil {
 83		return nil, err
 84	}
 85	cfg.knownProviders = providers
 86
 87	env := env.New()
 88	// Configure providers
 89	valueResolver := NewShellVariableResolver(env)
 90	cfg.resolver = valueResolver
 91	if err := cfg.configureProviders(env, valueResolver, cfg.knownProviders); err != nil {
 92		return nil, fmt.Errorf("failed to configure providers: %w", err)
 93	}
 94
 95	if !cfg.IsConfigured() {
 96		slog.Warn("No providers configured")
 97		return cfg, nil
 98	}
 99
100	if err := cfg.configureSelectedModels(cfg.knownProviders); err != nil {
101		return nil, fmt.Errorf("failed to configure selected models: %w", err)
102	}
103	cfg.SetupAgents()
104	return cfg, nil
105}
106
107func PushPopCrushEnv() func() {
108	found := []string{}
109	for _, ev := range os.Environ() {
110		if strings.HasPrefix(ev, "CRUSH_") {
111			pair := strings.SplitN(ev, "=", 2)
112			if len(pair) != 2 {
113				continue
114			}
115			found = append(found, strings.TrimPrefix(pair[0], "CRUSH_"))
116		}
117	}
118	backups := make(map[string]string)
119	for _, ev := range found {
120		backups[ev] = os.Getenv(ev)
121	}
122
123	for _, ev := range found {
124		os.Setenv(ev, os.Getenv("CRUSH_"+ev))
125	}
126
127	restore := func() {
128		for k, v := range backups {
129			os.Setenv(k, v)
130		}
131	}
132	return restore
133}
134
135func (c *Config) configureProviders(env env.Env, resolver VariableResolver, knownProviders []catwalk.Provider) error {
136	knownProviderNames := make(map[string]bool)
137	restore := PushPopCrushEnv()
138	defer restore()
139
140	for _, p := range knownProviders {
141		knownProviderNames[string(p.ID)] = true
142		config, configExists := c.Providers.Get(string(p.ID))
143		// if the user configured a known provider we need to allow it to override a couple of parameters
144		if configExists {
145			if config.BaseURL != "" {
146				p.APIEndpoint = config.BaseURL
147			}
148			if config.APIKey != "" {
149				p.APIKey = config.APIKey
150			}
151			if len(config.Models) > 0 {
152				models := []catwalk.Model{}
153				seen := make(map[string]bool)
154
155				for _, model := range config.Models {
156					if seen[model.ID] {
157						continue
158					}
159					seen[model.ID] = true
160					if model.Name == "" {
161						model.Name = model.ID
162					}
163					models = append(models, model)
164				}
165				for _, model := range p.Models {
166					if seen[model.ID] {
167						continue
168					}
169					seen[model.ID] = true
170					if model.Name == "" {
171						model.Name = model.ID
172					}
173					models = append(models, model)
174				}
175
176				p.Models = models
177			}
178		}
179
180		headers := map[string]string{}
181		if len(p.DefaultHeaders) > 0 {
182			maps.Copy(headers, p.DefaultHeaders)
183		}
184		if len(config.ExtraHeaders) > 0 {
185			maps.Copy(headers, config.ExtraHeaders)
186		}
187		prepared := ProviderConfig{
188			ID:                 string(p.ID),
189			Name:               p.Name,
190			BaseURL:            p.APIEndpoint,
191			APIKey:             p.APIKey,
192			APIKeyTemplate:     p.APIKey, // Store original template for re-resolution
193			OAuthToken:         config.OAuthToken,
194			Type:               p.Type,
195			Disable:            config.Disable,
196			SystemPromptPrefix: config.SystemPromptPrefix,
197			ExtraHeaders:       headers,
198			ExtraBody:          config.ExtraBody,
199			ExtraParams:        make(map[string]string),
200			Models:             p.Models,
201		}
202
203		switch {
204		case p.ID == catwalk.InferenceProviderAnthropic && config.OAuthToken != nil:
205			// Claude Code subscription is not supported anymore. Remove to show onboarding.
206			c.RemoveConfigField("providers.anthropic")
207			c.Providers.Del(string(p.ID))
208			continue
209		case p.ID == catwalk.InferenceProviderCopilot && config.OAuthToken != nil:
210			prepared.SetupGitHubCopilot()
211		}
212
213		switch p.ID {
214		// Handle specific providers that require additional configuration
215		case catwalk.InferenceProviderVertexAI:
216			if !hasVertexCredentials(env) {
217				if configExists {
218					slog.Warn("Skipping Vertex AI provider due to missing credentials")
219					c.Providers.Del(string(p.ID))
220				}
221				continue
222			}
223			prepared.ExtraParams["project"] = env.Get("VERTEXAI_PROJECT")
224			prepared.ExtraParams["location"] = env.Get("VERTEXAI_LOCATION")
225		case catwalk.InferenceProviderAzure:
226			endpoint, err := resolver.ResolveValue(p.APIEndpoint)
227			if err != nil || endpoint == "" {
228				if configExists {
229					slog.Warn("Skipping Azure provider due to missing API endpoint", "provider", p.ID, "error", err)
230					c.Providers.Del(string(p.ID))
231				}
232				continue
233			}
234			prepared.BaseURL = endpoint
235			prepared.ExtraParams["apiVersion"] = env.Get("AZURE_OPENAI_API_VERSION")
236		case catwalk.InferenceProviderBedrock:
237			if !hasAWSCredentials(env) {
238				if configExists {
239					slog.Warn("Skipping Bedrock provider due to missing AWS credentials")
240					c.Providers.Del(string(p.ID))
241				}
242				continue
243			}
244			prepared.ExtraParams["region"] = env.Get("AWS_REGION")
245			if prepared.ExtraParams["region"] == "" {
246				prepared.ExtraParams["region"] = env.Get("AWS_DEFAULT_REGION")
247			}
248			for _, model := range p.Models {
249				if !strings.HasPrefix(model.ID, "anthropic.") {
250					return fmt.Errorf("bedrock provider only supports anthropic models for now, found: %s", model.ID)
251				}
252			}
253		default:
254			// if the provider api or endpoint are missing we skip them
255			v, err := resolver.ResolveValue(p.APIKey)
256			if v == "" || err != nil {
257				if configExists {
258					slog.Warn("Skipping provider due to missing API key", "provider", p.ID)
259					c.Providers.Del(string(p.ID))
260				}
261				continue
262			}
263		}
264		c.Providers.Set(string(p.ID), prepared)
265	}
266
267	// validate the custom providers
268	for id, providerConfig := range c.Providers.Seq2() {
269		if knownProviderNames[id] {
270			continue
271		}
272
273		// Make sure the provider ID is set
274		providerConfig.ID = id
275		if providerConfig.Name == "" {
276			providerConfig.Name = id // Use ID as name if not set
277		}
278		// default to OpenAI if not set
279		if providerConfig.Type == "" {
280			providerConfig.Type = catwalk.TypeOpenAICompat
281		}
282		if !slices.Contains(catwalk.KnownProviderTypes(), providerConfig.Type) && providerConfig.Type != hyper.Name {
283			slog.Warn("Skipping custom provider due to unsupported provider type", "provider", id)
284			c.Providers.Del(id)
285			continue
286		}
287
288		if providerConfig.Disable {
289			slog.Debug("Skipping custom provider due to disable flag", "provider", id)
290			c.Providers.Del(id)
291			continue
292		}
293		if providerConfig.APIKey == "" {
294			slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
295		}
296		if providerConfig.BaseURL == "" {
297			slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id)
298			c.Providers.Del(id)
299			continue
300		}
301		if len(providerConfig.Models) == 0 {
302			slog.Warn("Skipping custom provider because the provider has no models", "provider", id)
303			c.Providers.Del(id)
304			continue
305		}
306		apiKey, err := resolver.ResolveValue(providerConfig.APIKey)
307		if apiKey == "" || err != nil {
308			slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
309		}
310		baseURL, err := resolver.ResolveValue(providerConfig.BaseURL)
311		if baseURL == "" || err != nil {
312			slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id, "error", err)
313			c.Providers.Del(id)
314			continue
315		}
316
317		c.Providers.Set(id, providerConfig)
318	}
319	return nil
320}
321
322func (c *Config) setDefaults(workingDir, dataDir string) {
323	c.workingDir = workingDir
324	if c.Options == nil {
325		c.Options = &Options{}
326	}
327	if c.Options.TUI == nil {
328		c.Options.TUI = &TUIOptions{}
329	}
330	if c.Options.ContextPaths == nil {
331		c.Options.ContextPaths = []string{}
332	}
333	if c.Options.MemoryPaths == nil {
334		crushConfigDir := filepath.Dir(GlobalConfig())
335		c.Options.MemoryPaths = []string{
336			filepath.Join(crushConfigDir, "CRUSH.md"),
337			filepath.Join(filepath.Dir(crushConfigDir), "AGENTS.md"),
338		}
339	}
340	c.Options.ContextPaths = append(c.Options.ContextPaths, c.Options.MemoryPaths...)
341	if c.Options.SkillsPaths == nil {
342		c.Options.SkillsPaths = []string{}
343	}
344	if dataDir != "" {
345		c.Options.DataDirectory = dataDir
346	} else if c.Options.DataDirectory == "" {
347		if path, ok := fsext.LookupClosest(workingDir, defaultDataDirectory); ok {
348			c.Options.DataDirectory = path
349		} else {
350			c.Options.DataDirectory = filepath.Join(workingDir, defaultDataDirectory)
351		}
352	}
353	if c.Providers == nil {
354		c.Providers = csync.NewMap[string, ProviderConfig]()
355	}
356	if c.Models == nil {
357		c.Models = make(map[SelectedModelType]SelectedModel)
358	}
359	if c.RecentModels == nil {
360		c.RecentModels = make(map[SelectedModelType][]SelectedModel)
361	}
362	if c.MCP == nil {
363		c.MCP = make(map[string]MCPConfig)
364	}
365	if c.LSP == nil {
366		c.LSP = make(map[string]LSPConfig)
367	}
368
369	// Apply defaults to LSP configurations
370	c.applyLSPDefaults()
371
372	// Add the default context paths if they are not already present
373	c.Options.ContextPaths = append(defaultContextPaths, c.Options.ContextPaths...)
374
375	slices.Sort(c.Options.ContextPaths)
376	c.Options.ContextPaths = slices.Compact(c.Options.ContextPaths)
377
378	// Add the default skills directories if not already present.
379	for _, dir := range GlobalSkillsDirs() {
380		if !slices.Contains(c.Options.SkillsPaths, dir) {
381			c.Options.SkillsPaths = append(c.Options.SkillsPaths, dir)
382		}
383	}
384
385	if str, ok := os.LookupEnv("CRUSH_DISABLE_PROVIDER_AUTO_UPDATE"); ok {
386		c.Options.DisableProviderAutoUpdate, _ = strconv.ParseBool(str)
387	}
388
389	if c.Options.Attribution == nil {
390		c.Options.Attribution = &Attribution{
391			TrailerStyle:  TrailerStyleAssistedBy,
392			GeneratedWith: true,
393		}
394	} else if c.Options.Attribution.TrailerStyle == "" {
395		// Migrate deprecated co_authored_by or apply default
396		if c.Options.Attribution.CoAuthoredBy != nil {
397			if *c.Options.Attribution.CoAuthoredBy {
398				c.Options.Attribution.TrailerStyle = TrailerStyleCoAuthoredBy
399			} else {
400				c.Options.Attribution.TrailerStyle = TrailerStyleNone
401			}
402		} else {
403			c.Options.Attribution.TrailerStyle = TrailerStyleAssistedBy
404		}
405	}
406	if c.Options.InitializeAs == "" {
407		c.Options.InitializeAs = defaultInitializeAs
408	}
409}
410
411// applyLSPDefaults applies default values from powernap to LSP configurations
412func (c *Config) applyLSPDefaults() {
413	// Get powernap's default configuration
414	configManager := powernapConfig.NewManager()
415	configManager.LoadDefaults()
416
417	// Apply defaults to each LSP configuration
418	for name, cfg := range c.LSP {
419		// Try to get defaults from powernap based on name or command name.
420		base, ok := configManager.GetServer(name)
421		if !ok {
422			base, ok = configManager.GetServer(cfg.Command)
423			if !ok {
424				continue
425			}
426		}
427		if cfg.Options == nil {
428			cfg.Options = base.Settings
429		}
430		if cfg.InitOptions == nil {
431			cfg.InitOptions = base.InitOptions
432		}
433		if len(cfg.FileTypes) == 0 {
434			cfg.FileTypes = base.FileTypes
435		}
436		if len(cfg.RootMarkers) == 0 {
437			cfg.RootMarkers = base.RootMarkers
438		}
439		if cfg.Command == "" {
440			cfg.Command = base.Command
441		}
442		if len(cfg.Args) == 0 {
443			cfg.Args = base.Args
444		}
445		if len(cfg.Env) == 0 {
446			cfg.Env = base.Environment
447		}
448		// Update the config in the map
449		c.LSP[name] = cfg
450	}
451}
452
453func (c *Config) defaultModelSelection(knownProviders []catwalk.Provider) (largeModel SelectedModel, smallModel SelectedModel, err error) {
454	if len(knownProviders) == 0 && c.Providers.Len() == 0 {
455		err = fmt.Errorf("no providers configured, please configure at least one provider")
456		return largeModel, smallModel, err
457	}
458
459	// Use the first provider enabled based on the known providers order
460	// if no provider found that is known use the first provider configured
461	for _, p := range knownProviders {
462		providerConfig, ok := c.Providers.Get(string(p.ID))
463		if !ok || providerConfig.Disable {
464			continue
465		}
466		defaultLargeModel := c.GetModel(string(p.ID), p.DefaultLargeModelID)
467		if defaultLargeModel == nil {
468			err = fmt.Errorf("default large model %s not found for provider %s", p.DefaultLargeModelID, p.ID)
469			return largeModel, smallModel, err
470		}
471		largeModel = SelectedModel{
472			Provider:        string(p.ID),
473			Model:           defaultLargeModel.ID,
474			MaxTokens:       defaultLargeModel.DefaultMaxTokens,
475			ReasoningEffort: defaultLargeModel.DefaultReasoningEffort,
476		}
477
478		defaultSmallModel := c.GetModel(string(p.ID), p.DefaultSmallModelID)
479		if defaultSmallModel == nil {
480			err = fmt.Errorf("default small model %s not found for provider %s", p.DefaultSmallModelID, p.ID)
481			return largeModel, smallModel, err
482		}
483		smallModel = SelectedModel{
484			Provider:        string(p.ID),
485			Model:           defaultSmallModel.ID,
486			MaxTokens:       defaultSmallModel.DefaultMaxTokens,
487			ReasoningEffort: defaultSmallModel.DefaultReasoningEffort,
488		}
489		return largeModel, smallModel, err
490	}
491
492	enabledProviders := c.EnabledProviders()
493	slices.SortFunc(enabledProviders, func(a, b ProviderConfig) int {
494		return strings.Compare(a.ID, b.ID)
495	})
496
497	if len(enabledProviders) == 0 {
498		err = fmt.Errorf("no providers configured, please configure at least one provider")
499		return largeModel, smallModel, err
500	}
501
502	providerConfig := enabledProviders[0]
503	if len(providerConfig.Models) == 0 {
504		err = fmt.Errorf("provider %s has no models configured", providerConfig.ID)
505		return largeModel, smallModel, err
506	}
507	defaultLargeModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
508	largeModel = SelectedModel{
509		Provider:  providerConfig.ID,
510		Model:     defaultLargeModel.ID,
511		MaxTokens: defaultLargeModel.DefaultMaxTokens,
512	}
513	defaultSmallModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
514	smallModel = SelectedModel{
515		Provider:  providerConfig.ID,
516		Model:     defaultSmallModel.ID,
517		MaxTokens: defaultSmallModel.DefaultMaxTokens,
518	}
519	return largeModel, smallModel, err
520}
521
522func (c *Config) configureSelectedModels(knownProviders []catwalk.Provider) error {
523	defaultLarge, defaultSmall, err := c.defaultModelSelection(knownProviders)
524	if err != nil {
525		return fmt.Errorf("failed to select default models: %w", err)
526	}
527	large, small := defaultLarge, defaultSmall
528
529	largeModelSelected, largeModelConfigured := c.Models[SelectedModelTypeLarge]
530	if largeModelConfigured {
531		if largeModelSelected.Model != "" {
532			large.Model = largeModelSelected.Model
533		}
534		if largeModelSelected.Provider != "" {
535			large.Provider = largeModelSelected.Provider
536		}
537		model := c.GetModel(large.Provider, large.Model)
538		if model == nil {
539			large = defaultLarge
540			// override the model type to large
541			err := c.UpdatePreferredModel(SelectedModelTypeLarge, large)
542			if err != nil {
543				return fmt.Errorf("failed to update preferred large model: %w", err)
544			}
545		} else {
546			if largeModelSelected.MaxTokens > 0 {
547				large.MaxTokens = largeModelSelected.MaxTokens
548			} else {
549				large.MaxTokens = model.DefaultMaxTokens
550			}
551			if largeModelSelected.ReasoningEffort != "" {
552				large.ReasoningEffort = largeModelSelected.ReasoningEffort
553			}
554			large.Think = largeModelSelected.Think
555			if largeModelSelected.Temperature != nil {
556				large.Temperature = largeModelSelected.Temperature
557			}
558			if largeModelSelected.TopP != nil {
559				large.TopP = largeModelSelected.TopP
560			}
561			if largeModelSelected.TopK != nil {
562				large.TopK = largeModelSelected.TopK
563			}
564			if largeModelSelected.FrequencyPenalty != nil {
565				large.FrequencyPenalty = largeModelSelected.FrequencyPenalty
566			}
567			if largeModelSelected.PresencePenalty != nil {
568				large.PresencePenalty = largeModelSelected.PresencePenalty
569			}
570		}
571	}
572	smallModelSelected, smallModelConfigured := c.Models[SelectedModelTypeSmall]
573	if smallModelConfigured {
574		if smallModelSelected.Model != "" {
575			small.Model = smallModelSelected.Model
576		}
577		if smallModelSelected.Provider != "" {
578			small.Provider = smallModelSelected.Provider
579		}
580
581		model := c.GetModel(small.Provider, small.Model)
582		if model == nil {
583			small = defaultSmall
584			// override the model type to small
585			err := c.UpdatePreferredModel(SelectedModelTypeSmall, small)
586			if err != nil {
587				return fmt.Errorf("failed to update preferred small model: %w", err)
588			}
589		} else {
590			if smallModelSelected.MaxTokens > 0 {
591				small.MaxTokens = smallModelSelected.MaxTokens
592			} else {
593				small.MaxTokens = model.DefaultMaxTokens
594			}
595			if smallModelSelected.ReasoningEffort != "" {
596				small.ReasoningEffort = smallModelSelected.ReasoningEffort
597			}
598			if smallModelSelected.Temperature != nil {
599				small.Temperature = smallModelSelected.Temperature
600			}
601			if smallModelSelected.TopP != nil {
602				small.TopP = smallModelSelected.TopP
603			}
604			if smallModelSelected.TopK != nil {
605				small.TopK = smallModelSelected.TopK
606			}
607			if smallModelSelected.FrequencyPenalty != nil {
608				small.FrequencyPenalty = smallModelSelected.FrequencyPenalty
609			}
610			if smallModelSelected.PresencePenalty != nil {
611				small.PresencePenalty = smallModelSelected.PresencePenalty
612			}
613			small.Think = smallModelSelected.Think
614		}
615	}
616	c.Models[SelectedModelTypeLarge] = large
617	c.Models[SelectedModelTypeSmall] = small
618	return nil
619}
620
621// lookupConfigs searches config files recursively from CWD up to FS root
622func lookupConfigs(cwd string) []string {
623	// prepend default config paths
624	configPaths := []string{
625		GlobalConfig(),
626		GlobalConfigData(),
627	}
628
629	configNames := []string{appName + ".json", "." + appName + ".json"}
630
631	foundConfigs, err := fsext.Lookup(cwd, configNames...)
632	if err != nil {
633		// returns at least default configs
634		return configPaths
635	}
636
637	// reverse order so last config has more priority
638	slices.Reverse(foundConfigs)
639
640	return append(configPaths, foundConfigs...)
641}
642
643func loadFromConfigPaths(configPaths []string) (*Config, error) {
644	var configs []io.Reader
645
646	for _, path := range configPaths {
647		fd, err := os.Open(path)
648		if err != nil {
649			if os.IsNotExist(err) {
650				continue
651			}
652			return nil, fmt.Errorf("failed to open config file %s: %w", path, err)
653		}
654		defer fd.Close()
655
656		configs = append(configs, fd)
657	}
658
659	return loadFromReaders(configs)
660}
661
662func loadFromReaders(readers []io.Reader) (*Config, error) {
663	if len(readers) == 0 {
664		return &Config{}, nil
665	}
666
667	merged, err := Merge(readers)
668	if err != nil {
669		return nil, fmt.Errorf("failed to merge configuration readers: %w", err)
670	}
671
672	return LoadReader(merged)
673}
674
675func hasVertexCredentials(env env.Env) bool {
676	hasProject := env.Get("VERTEXAI_PROJECT") != ""
677	hasLocation := env.Get("VERTEXAI_LOCATION") != ""
678	return hasProject && hasLocation
679}
680
681func hasAWSCredentials(env env.Env) bool {
682	if env.Get("AWS_BEARER_TOKEN_BEDROCK") != "" {
683		return true
684	}
685
686	if env.Get("AWS_ACCESS_KEY_ID") != "" && env.Get("AWS_SECRET_ACCESS_KEY") != "" {
687		return true
688	}
689
690	if env.Get("AWS_PROFILE") != "" || env.Get("AWS_DEFAULT_PROFILE") != "" {
691		return true
692	}
693
694	if env.Get("AWS_REGION") != "" || env.Get("AWS_DEFAULT_REGION") != "" {
695		return true
696	}
697
698	if env.Get("AWS_CONTAINER_CREDENTIALS_RELATIVE_URI") != "" ||
699		env.Get("AWS_CONTAINER_CREDENTIALS_FULL_URI") != "" {
700		return true
701	}
702
703	if _, err := os.Stat(filepath.Join(home.Dir(), ".aws/credentials")); err == nil && !testing.Testing() {
704		return true
705	}
706
707	return false
708}
709
710// GlobalConfig returns the global configuration file path for the application.
711func GlobalConfig() string {
712	if crushGlobal := os.Getenv("CRUSH_GLOBAL_CONFIG"); crushGlobal != "" {
713		return filepath.Join(crushGlobal, fmt.Sprintf("%s.json", appName))
714	}
715	if xdgConfigHome := os.Getenv("XDG_CONFIG_HOME"); xdgConfigHome != "" {
716		return filepath.Join(xdgConfigHome, appName, fmt.Sprintf("%s.json", appName))
717	}
718	return filepath.Join(home.Dir(), ".config", appName, fmt.Sprintf("%s.json", appName))
719}
720
721// GlobalConfigData returns the path to the main data directory for the application.
722// this config is used when the app overrides configurations instead of updating the global config.
723func GlobalConfigData() string {
724	if crushData := os.Getenv("CRUSH_GLOBAL_DATA"); crushData != "" {
725		return filepath.Join(crushData, fmt.Sprintf("%s.json", appName))
726	}
727	if xdgDataHome := os.Getenv("XDG_DATA_HOME"); xdgDataHome != "" {
728		return filepath.Join(xdgDataHome, appName, fmt.Sprintf("%s.json", appName))
729	}
730
731	// return the path to the main data directory
732	// for windows, it should be in `%LOCALAPPDATA%/crush/`
733	// for linux and macOS, it should be in `$HOME/.local/share/crush/`
734	if runtime.GOOS == "windows" {
735		localAppData := cmp.Or(
736			os.Getenv("LOCALAPPDATA"),
737			filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local"),
738		)
739		return filepath.Join(localAppData, appName, fmt.Sprintf("%s.json", appName))
740	}
741
742	return filepath.Join(home.Dir(), ".local", "share", appName, fmt.Sprintf("%s.json", appName))
743}
744
745func assignIfNil[T any](ptr **T, val T) {
746	if *ptr == nil {
747		*ptr = &val
748	}
749}
750
751func isInsideWorktree() bool {
752	bts, err := exec.CommandContext(
753		context.Background(),
754		"git", "rev-parse",
755		"--is-inside-work-tree",
756	).CombinedOutput()
757	return err == nil && strings.TrimSpace(string(bts)) == "true"
758}
759
760// GlobalSkillsDirs returns the default directories for Agent Skills.
761// Skills in these directories are auto-discovered and their files can be read
762// without permission prompts.
763func GlobalSkillsDirs() []string {
764	if crushSkills := os.Getenv("CRUSH_SKILLS_DIR"); crushSkills != "" {
765		return []string{crushSkills}
766	}
767
768	// Determine the base config directory.
769	var configBase string
770	if xdgConfigHome := os.Getenv("XDG_CONFIG_HOME"); xdgConfigHome != "" {
771		configBase = xdgConfigHome
772	} else if runtime.GOOS == "windows" {
773		configBase = cmp.Or(
774			os.Getenv("LOCALAPPDATA"),
775			filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local"),
776		)
777	} else {
778		configBase = filepath.Join(home.Dir(), ".config")
779	}
780
781	return []string{
782		filepath.Join(configBase, appName, "skills"),
783		filepath.Join(configBase, "agents", "skills"),
784	}
785}