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			prepared.SetupClaudeCode()
206		case p.ID == catwalk.InferenceProviderCopilot:
207			if config.OAuthToken != nil {
208				prepared.SetupGitHubCopilot()
209			}
210		}
211
212		switch p.ID {
213		// Handle specific providers that require additional configuration
214		case catwalk.InferenceProviderVertexAI:
215			if !hasVertexCredentials(env) {
216				if configExists {
217					slog.Warn("Skipping Vertex AI provider due to missing credentials")
218					c.Providers.Del(string(p.ID))
219				}
220				continue
221			}
222			prepared.ExtraParams["project"] = env.Get("VERTEXAI_PROJECT")
223			prepared.ExtraParams["location"] = env.Get("VERTEXAI_LOCATION")
224		case catwalk.InferenceProviderAzure:
225			endpoint, err := resolver.ResolveValue(p.APIEndpoint)
226			if err != nil || endpoint == "" {
227				if configExists {
228					slog.Warn("Skipping Azure provider due to missing API endpoint", "provider", p.ID, "error", err)
229					c.Providers.Del(string(p.ID))
230				}
231				continue
232			}
233			prepared.BaseURL = endpoint
234			prepared.ExtraParams["apiVersion"] = env.Get("AZURE_OPENAI_API_VERSION")
235		case catwalk.InferenceProviderBedrock:
236			if !hasAWSCredentials(env) {
237				if configExists {
238					slog.Warn("Skipping Bedrock provider due to missing AWS credentials")
239					c.Providers.Del(string(p.ID))
240				}
241				continue
242			}
243			prepared.ExtraParams["region"] = env.Get("AWS_REGION")
244			if prepared.ExtraParams["region"] == "" {
245				prepared.ExtraParams["region"] = env.Get("AWS_DEFAULT_REGION")
246			}
247			for _, model := range p.Models {
248				if !strings.HasPrefix(model.ID, "anthropic.") {
249					return fmt.Errorf("bedrock provider only supports anthropic models for now, found: %s", model.ID)
250				}
251			}
252		default:
253			// if the provider api or endpoint are missing we skip them
254			v, err := resolver.ResolveValue(p.APIKey)
255			if v == "" || err != nil {
256				if configExists {
257					slog.Warn("Skipping provider due to missing API key", "provider", p.ID)
258					c.Providers.Del(string(p.ID))
259				}
260				continue
261			}
262		}
263		c.Providers.Set(string(p.ID), prepared)
264	}
265
266	// validate the custom providers
267	for id, providerConfig := range c.Providers.Seq2() {
268		if knownProviderNames[id] {
269			continue
270		}
271
272		// Make sure the provider ID is set
273		providerConfig.ID = id
274		if providerConfig.Name == "" {
275			providerConfig.Name = id // Use ID as name if not set
276		}
277		// default to OpenAI if not set
278		if providerConfig.Type == "" {
279			providerConfig.Type = catwalk.TypeOpenAICompat
280		}
281		if !slices.Contains(catwalk.KnownProviderTypes(), providerConfig.Type) && providerConfig.Type != hyper.Name {
282			slog.Warn("Skipping custom provider due to unsupported provider type", "provider", id)
283			c.Providers.Del(id)
284			continue
285		}
286
287		if providerConfig.Disable {
288			slog.Debug("Skipping custom provider due to disable flag", "provider", id)
289			c.Providers.Del(id)
290			continue
291		}
292		if providerConfig.APIKey == "" {
293			slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
294		}
295		if providerConfig.BaseURL == "" {
296			slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id)
297			c.Providers.Del(id)
298			continue
299		}
300		if len(providerConfig.Models) == 0 {
301			slog.Warn("Skipping custom provider because the provider has no models", "provider", id)
302			c.Providers.Del(id)
303			continue
304		}
305		apiKey, err := resolver.ResolveValue(providerConfig.APIKey)
306		if apiKey == "" || err != nil {
307			slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
308		}
309		baseURL, err := resolver.ResolveValue(providerConfig.BaseURL)
310		if baseURL == "" || err != nil {
311			slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id, "error", err)
312			c.Providers.Del(id)
313			continue
314		}
315
316		c.Providers.Set(id, providerConfig)
317	}
318	return nil
319}
320
321func (c *Config) setDefaults(workingDir, dataDir string) {
322	c.workingDir = workingDir
323	if c.Options == nil {
324		c.Options = &Options{}
325	}
326	if c.Options.TUI == nil {
327		c.Options.TUI = &TUIOptions{}
328	}
329	if c.Options.ContextPaths == nil {
330		c.Options.ContextPaths = []string{}
331	}
332	if c.Options.MemoryPaths == nil {
333		crushConfigDir := filepath.Dir(GlobalConfig())
334		c.Options.MemoryPaths = []string{
335			filepath.Join(crushConfigDir, "CRUSH.md"),
336			filepath.Join(filepath.Dir(crushConfigDir), "AGENTS.md"),
337		}
338	}
339	c.Options.ContextPaths = append(c.Options.ContextPaths, c.Options.MemoryPaths...)
340	if c.Options.SkillsPaths == nil {
341		c.Options.SkillsPaths = []string{}
342	}
343	if dataDir != "" {
344		c.Options.DataDirectory = dataDir
345	} else if c.Options.DataDirectory == "" {
346		if path, ok := fsext.LookupClosest(workingDir, defaultDataDirectory); ok {
347			c.Options.DataDirectory = path
348		} else {
349			c.Options.DataDirectory = filepath.Join(workingDir, defaultDataDirectory)
350		}
351	}
352	if c.Providers == nil {
353		c.Providers = csync.NewMap[string, ProviderConfig]()
354	}
355	if c.Models == nil {
356		c.Models = make(map[SelectedModelType]SelectedModel)
357	}
358	if c.RecentModels == nil {
359		c.RecentModels = make(map[SelectedModelType][]SelectedModel)
360	}
361	if c.MCP == nil {
362		c.MCP = make(map[string]MCPConfig)
363	}
364	if c.LSP == nil {
365		c.LSP = make(map[string]LSPConfig)
366	}
367
368	// Apply defaults to LSP configurations
369	c.applyLSPDefaults()
370
371	// Add the default context paths if they are not already present
372	c.Options.ContextPaths = append(defaultContextPaths, c.Options.ContextPaths...)
373
374	slices.Sort(c.Options.ContextPaths)
375	c.Options.ContextPaths = slices.Compact(c.Options.ContextPaths)
376
377	// Add the default skills directories if not already present.
378	for _, dir := range GlobalSkillsDirs() {
379		if !slices.Contains(c.Options.SkillsPaths, dir) {
380			c.Options.SkillsPaths = append(c.Options.SkillsPaths, dir)
381		}
382	}
383
384	if str, ok := os.LookupEnv("CRUSH_DISABLE_PROVIDER_AUTO_UPDATE"); ok {
385		c.Options.DisableProviderAutoUpdate, _ = strconv.ParseBool(str)
386	}
387
388	if c.Options.Attribution == nil {
389		c.Options.Attribution = &Attribution{
390			TrailerStyle:  TrailerStyleAssistedBy,
391			GeneratedWith: true,
392		}
393	} else if c.Options.Attribution.TrailerStyle == "" {
394		// Migrate deprecated co_authored_by or apply default
395		if c.Options.Attribution.CoAuthoredBy != nil {
396			if *c.Options.Attribution.CoAuthoredBy {
397				c.Options.Attribution.TrailerStyle = TrailerStyleCoAuthoredBy
398			} else {
399				c.Options.Attribution.TrailerStyle = TrailerStyleNone
400			}
401		} else {
402			c.Options.Attribution.TrailerStyle = TrailerStyleAssistedBy
403		}
404	}
405	if c.Options.InitializeAs == "" {
406		c.Options.InitializeAs = defaultInitializeAs
407	}
408}
409
410// applyLSPDefaults applies default values from powernap to LSP configurations
411func (c *Config) applyLSPDefaults() {
412	// Get powernap's default configuration
413	configManager := powernapConfig.NewManager()
414	configManager.LoadDefaults()
415
416	// Apply defaults to each LSP configuration
417	for name, cfg := range c.LSP {
418		// Try to get defaults from powernap based on name or command name.
419		base, ok := configManager.GetServer(name)
420		if !ok {
421			base, ok = configManager.GetServer(cfg.Command)
422			if !ok {
423				continue
424			}
425		}
426		if cfg.Options == nil {
427			cfg.Options = base.Settings
428		}
429		if cfg.InitOptions == nil {
430			cfg.InitOptions = base.InitOptions
431		}
432		if len(cfg.FileTypes) == 0 {
433			cfg.FileTypes = base.FileTypes
434		}
435		if len(cfg.RootMarkers) == 0 {
436			cfg.RootMarkers = base.RootMarkers
437		}
438		if cfg.Command == "" {
439			cfg.Command = base.Command
440		}
441		if len(cfg.Args) == 0 {
442			cfg.Args = base.Args
443		}
444		if len(cfg.Env) == 0 {
445			cfg.Env = base.Environment
446		}
447		// Update the config in the map
448		c.LSP[name] = cfg
449	}
450}
451
452func (c *Config) defaultModelSelection(knownProviders []catwalk.Provider) (largeModel SelectedModel, smallModel SelectedModel, err error) {
453	if len(knownProviders) == 0 && c.Providers.Len() == 0 {
454		err = fmt.Errorf("no providers configured, please configure at least one provider")
455		return largeModel, smallModel, err
456	}
457
458	// Use the first provider enabled based on the known providers order
459	// if no provider found that is known use the first provider configured
460	for _, p := range knownProviders {
461		providerConfig, ok := c.Providers.Get(string(p.ID))
462		if !ok || providerConfig.Disable {
463			continue
464		}
465		defaultLargeModel := c.GetModel(string(p.ID), p.DefaultLargeModelID)
466		if defaultLargeModel == nil {
467			err = fmt.Errorf("default large model %s not found for provider %s", p.DefaultLargeModelID, p.ID)
468			return largeModel, smallModel, err
469		}
470		largeModel = SelectedModel{
471			Provider:        string(p.ID),
472			Model:           defaultLargeModel.ID,
473			MaxTokens:       defaultLargeModel.DefaultMaxTokens,
474			ReasoningEffort: defaultLargeModel.DefaultReasoningEffort,
475		}
476
477		defaultSmallModel := c.GetModel(string(p.ID), p.DefaultSmallModelID)
478		if defaultSmallModel == nil {
479			err = fmt.Errorf("default small model %s not found for provider %s", p.DefaultSmallModelID, p.ID)
480			return largeModel, smallModel, err
481		}
482		smallModel = SelectedModel{
483			Provider:        string(p.ID),
484			Model:           defaultSmallModel.ID,
485			MaxTokens:       defaultSmallModel.DefaultMaxTokens,
486			ReasoningEffort: defaultSmallModel.DefaultReasoningEffort,
487		}
488		return largeModel, smallModel, err
489	}
490
491	enabledProviders := c.EnabledProviders()
492	slices.SortFunc(enabledProviders, func(a, b ProviderConfig) int {
493		return strings.Compare(a.ID, b.ID)
494	})
495
496	if len(enabledProviders) == 0 {
497		err = fmt.Errorf("no providers configured, please configure at least one provider")
498		return largeModel, smallModel, err
499	}
500
501	providerConfig := enabledProviders[0]
502	if len(providerConfig.Models) == 0 {
503		err = fmt.Errorf("provider %s has no models configured", providerConfig.ID)
504		return largeModel, smallModel, err
505	}
506	defaultLargeModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
507	largeModel = SelectedModel{
508		Provider:  providerConfig.ID,
509		Model:     defaultLargeModel.ID,
510		MaxTokens: defaultLargeModel.DefaultMaxTokens,
511	}
512	defaultSmallModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
513	smallModel = SelectedModel{
514		Provider:  providerConfig.ID,
515		Model:     defaultSmallModel.ID,
516		MaxTokens: defaultSmallModel.DefaultMaxTokens,
517	}
518	return largeModel, smallModel, err
519}
520
521func (c *Config) configureSelectedModels(knownProviders []catwalk.Provider) error {
522	defaultLarge, defaultSmall, err := c.defaultModelSelection(knownProviders)
523	if err != nil {
524		return fmt.Errorf("failed to select default models: %w", err)
525	}
526	large, small := defaultLarge, defaultSmall
527
528	largeModelSelected, largeModelConfigured := c.Models[SelectedModelTypeLarge]
529	if largeModelConfigured {
530		if largeModelSelected.Model != "" {
531			large.Model = largeModelSelected.Model
532		}
533		if largeModelSelected.Provider != "" {
534			large.Provider = largeModelSelected.Provider
535		}
536		model := c.GetModel(large.Provider, large.Model)
537		if model == nil {
538			large = defaultLarge
539			// override the model type to large
540			err := c.UpdatePreferredModel(SelectedModelTypeLarge, large)
541			if err != nil {
542				return fmt.Errorf("failed to update preferred large model: %w", err)
543			}
544		} else {
545			if largeModelSelected.MaxTokens > 0 {
546				large.MaxTokens = largeModelSelected.MaxTokens
547			} else {
548				large.MaxTokens = model.DefaultMaxTokens
549			}
550			if largeModelSelected.ReasoningEffort != "" {
551				large.ReasoningEffort = largeModelSelected.ReasoningEffort
552			}
553			large.Think = largeModelSelected.Think
554			if largeModelSelected.Temperature != nil {
555				large.Temperature = largeModelSelected.Temperature
556			}
557			if largeModelSelected.TopP != nil {
558				large.TopP = largeModelSelected.TopP
559			}
560			if largeModelSelected.TopK != nil {
561				large.TopK = largeModelSelected.TopK
562			}
563			if largeModelSelected.FrequencyPenalty != nil {
564				large.FrequencyPenalty = largeModelSelected.FrequencyPenalty
565			}
566			if largeModelSelected.PresencePenalty != nil {
567				large.PresencePenalty = largeModelSelected.PresencePenalty
568			}
569		}
570	}
571	smallModelSelected, smallModelConfigured := c.Models[SelectedModelTypeSmall]
572	if smallModelConfigured {
573		if smallModelSelected.Model != "" {
574			small.Model = smallModelSelected.Model
575		}
576		if smallModelSelected.Provider != "" {
577			small.Provider = smallModelSelected.Provider
578		}
579
580		model := c.GetModel(small.Provider, small.Model)
581		if model == nil {
582			small = defaultSmall
583			// override the model type to small
584			err := c.UpdatePreferredModel(SelectedModelTypeSmall, small)
585			if err != nil {
586				return fmt.Errorf("failed to update preferred small model: %w", err)
587			}
588		} else {
589			if smallModelSelected.MaxTokens > 0 {
590				small.MaxTokens = smallModelSelected.MaxTokens
591			} else {
592				small.MaxTokens = model.DefaultMaxTokens
593			}
594			if smallModelSelected.ReasoningEffort != "" {
595				small.ReasoningEffort = smallModelSelected.ReasoningEffort
596			}
597			if smallModelSelected.Temperature != nil {
598				small.Temperature = smallModelSelected.Temperature
599			}
600			if smallModelSelected.TopP != nil {
601				small.TopP = smallModelSelected.TopP
602			}
603			if smallModelSelected.TopK != nil {
604				small.TopK = smallModelSelected.TopK
605			}
606			if smallModelSelected.FrequencyPenalty != nil {
607				small.FrequencyPenalty = smallModelSelected.FrequencyPenalty
608			}
609			if smallModelSelected.PresencePenalty != nil {
610				small.PresencePenalty = smallModelSelected.PresencePenalty
611			}
612			small.Think = smallModelSelected.Think
613		}
614	}
615	c.Models[SelectedModelTypeLarge] = large
616	c.Models[SelectedModelTypeSmall] = small
617	return nil
618}
619
620// lookupConfigs searches config files recursively from CWD up to FS root
621func lookupConfigs(cwd string) []string {
622	// prepend default config paths
623	configPaths := []string{
624		GlobalConfig(),
625		GlobalConfigData(),
626	}
627
628	configNames := []string{appName + ".json", "." + appName + ".json"}
629
630	foundConfigs, err := fsext.Lookup(cwd, configNames...)
631	if err != nil {
632		// returns at least default configs
633		return configPaths
634	}
635
636	// reverse order so last config has more priority
637	slices.Reverse(foundConfigs)
638
639	return append(configPaths, foundConfigs...)
640}
641
642func loadFromConfigPaths(configPaths []string) (*Config, error) {
643	var configs []io.Reader
644
645	for _, path := range configPaths {
646		fd, err := os.Open(path)
647		if err != nil {
648			if os.IsNotExist(err) {
649				continue
650			}
651			return nil, fmt.Errorf("failed to open config file %s: %w", path, err)
652		}
653		defer fd.Close()
654
655		configs = append(configs, fd)
656	}
657
658	return loadFromReaders(configs)
659}
660
661func loadFromReaders(readers []io.Reader) (*Config, error) {
662	if len(readers) == 0 {
663		return &Config{}, nil
664	}
665
666	merged, err := Merge(readers)
667	if err != nil {
668		return nil, fmt.Errorf("failed to merge configuration readers: %w", err)
669	}
670
671	return LoadReader(merged)
672}
673
674func hasVertexCredentials(env env.Env) bool {
675	hasProject := env.Get("VERTEXAI_PROJECT") != ""
676	hasLocation := env.Get("VERTEXAI_LOCATION") != ""
677	return hasProject && hasLocation
678}
679
680func hasAWSCredentials(env env.Env) bool {
681	if env.Get("AWS_BEARER_TOKEN_BEDROCK") != "" {
682		return true
683	}
684
685	if env.Get("AWS_ACCESS_KEY_ID") != "" && env.Get("AWS_SECRET_ACCESS_KEY") != "" {
686		return true
687	}
688
689	if env.Get("AWS_PROFILE") != "" || env.Get("AWS_DEFAULT_PROFILE") != "" {
690		return true
691	}
692
693	if env.Get("AWS_REGION") != "" || env.Get("AWS_DEFAULT_REGION") != "" {
694		return true
695	}
696
697	if env.Get("AWS_CONTAINER_CREDENTIALS_RELATIVE_URI") != "" ||
698		env.Get("AWS_CONTAINER_CREDENTIALS_FULL_URI") != "" {
699		return true
700	}
701
702	if _, err := os.Stat(filepath.Join(home.Dir(), ".aws/credentials")); err == nil && !testing.Testing() {
703		return true
704	}
705
706	return false
707}
708
709// GlobalConfig returns the global configuration file path for the application.
710func GlobalConfig() string {
711	if crushGlobal := os.Getenv("CRUSH_GLOBAL_CONFIG"); crushGlobal != "" {
712		return filepath.Join(crushGlobal, fmt.Sprintf("%s.json", appName))
713	}
714	if xdgConfigHome := os.Getenv("XDG_CONFIG_HOME"); xdgConfigHome != "" {
715		return filepath.Join(xdgConfigHome, appName, fmt.Sprintf("%s.json", appName))
716	}
717	return filepath.Join(home.Dir(), ".config", appName, fmt.Sprintf("%s.json", appName))
718}
719
720// GlobalConfigData returns the path to the main data directory for the application.
721// this config is used when the app overrides configurations instead of updating the global config.
722func GlobalConfigData() string {
723	if crushData := os.Getenv("CRUSH_GLOBAL_DATA"); crushData != "" {
724		return filepath.Join(crushData, fmt.Sprintf("%s.json", appName))
725	}
726	if xdgDataHome := os.Getenv("XDG_DATA_HOME"); xdgDataHome != "" {
727		return filepath.Join(xdgDataHome, appName, fmt.Sprintf("%s.json", appName))
728	}
729
730	// return the path to the main data directory
731	// for windows, it should be in `%LOCALAPPDATA%/crush/`
732	// for linux and macOS, it should be in `$HOME/.local/share/crush/`
733	if runtime.GOOS == "windows" {
734		localAppData := cmp.Or(
735			os.Getenv("LOCALAPPDATA"),
736			filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local"),
737		)
738		return filepath.Join(localAppData, appName, fmt.Sprintf("%s.json", appName))
739	}
740
741	return filepath.Join(home.Dir(), ".local", "share", appName, fmt.Sprintf("%s.json", appName))
742}
743
744func assignIfNil[T any](ptr **T, val T) {
745	if *ptr == nil {
746		*ptr = &val
747	}
748}
749
750func isInsideWorktree() bool {
751	bts, err := exec.CommandContext(
752		context.Background(),
753		"git", "rev-parse",
754		"--is-inside-work-tree",
755	).CombinedOutput()
756	return err == nil && strings.TrimSpace(string(bts)) == "true"
757}
758
759// GlobalSkillsDirs returns the default directories for Agent Skills.
760// Skills in these directories are auto-discovered and their files can be read
761// without permission prompts.
762func GlobalSkillsDirs() []string {
763	if crushSkills := os.Getenv("CRUSH_SKILLS_DIR"); crushSkills != "" {
764		return []string{crushSkills}
765	}
766
767	// Determine the base config directory.
768	var configBase string
769	if xdgConfigHome := os.Getenv("XDG_CONFIG_HOME"); xdgConfigHome != "" {
770		configBase = xdgConfigHome
771	} else if runtime.GOOS == "windows" {
772		configBase = cmp.Or(
773			os.Getenv("LOCALAPPDATA"),
774			filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local"),
775		)
776	} else {
777		configBase = filepath.Join(home.Dir(), ".config")
778	}
779
780	return []string{
781		filepath.Join(configBase, appName, "skills"),
782		filepath.Join(configBase, "agents", "skills"),
783	}
784}