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