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