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