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