1package config
2
3import (
4 "encoding/json"
5 "fmt"
6 "io"
7 "log/slog"
8 "maps"
9 "os"
10 "path/filepath"
11 "runtime"
12 "slices"
13 "strconv"
14 "strings"
15
16 "github.com/charmbracelet/catwalk/pkg/catwalk"
17 "github.com/charmbracelet/crush/internal/csync"
18 "github.com/charmbracelet/crush/internal/env"
19 "github.com/charmbracelet/crush/internal/fsext"
20 "github.com/charmbracelet/crush/internal/home"
21 "github.com/charmbracelet/crush/internal/log"
22 powernapConfig "github.com/charmbracelet/x/powernap/pkg/config"
23)
24
25const defaultCatwalkURL = "https://catwalk.charm.sh"
26
27// LoadReader config via io.Reader.
28func LoadReader(fd io.Reader) (*Config, error) {
29 data, err := io.ReadAll(fd)
30 if err != nil {
31 return nil, err
32 }
33
34 var config Config
35 err = json.Unmarshal(data, &config)
36 if err != nil {
37 return nil, err
38 }
39 return &config, err
40}
41
42// Load loads the configuration from the default paths.
43func Load(workingDir, dataDir string, debug bool) (*Config, error) {
44 // uses default config paths
45 configPaths := []string{
46 globalConfig(),
47 GlobalConfigData(),
48 filepath.Join(workingDir, fmt.Sprintf("%s.json", appName)),
49 filepath.Join(workingDir, fmt.Sprintf(".%s.json", appName)),
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 // Load known providers, this loads the config from catwalk
71 providers, err := Providers(cfg)
72 if err != nil {
73 return nil, err
74 }
75 cfg.knownProviders = providers
76
77 env := env.New()
78 // Configure providers
79 valueResolver := NewShellVariableResolver(env)
80 cfg.resolver = valueResolver
81 if err := cfg.configureProviders(env, valueResolver, cfg.knownProviders); err != nil {
82 return nil, fmt.Errorf("failed to configure providers: %w", err)
83 }
84
85 if !cfg.IsConfigured() {
86 slog.Warn("No providers configured")
87 return cfg, nil
88 }
89
90 if err := cfg.configureSelectedModels(cfg.knownProviders); err != nil {
91 return nil, fmt.Errorf("failed to configure selected models: %w", err)
92 }
93 cfg.SetupAgents()
94 return cfg, nil
95}
96
97func PushPopCrushEnv() func() {
98 found := []string{}
99 for _, ev := range os.Environ() {
100 if strings.HasPrefix(ev, "CRUSH_") {
101 pair := strings.SplitN(ev, "=", 2)
102 if len(pair) != 2 {
103 continue
104 }
105 found = append(found, strings.TrimPrefix(pair[0], "CRUSH_"))
106 }
107 }
108 backups := make(map[string]string)
109 for _, ev := range found {
110 backups[ev] = os.Getenv(ev)
111 }
112
113 for _, ev := range found {
114 os.Setenv(ev, os.Getenv("CRUSH_"+ev))
115 }
116
117 restore := func() {
118 for k, v := range backups {
119 os.Setenv(k, v)
120 }
121 }
122 return restore
123}
124
125func (c *Config) configureProviders(env env.Env, resolver VariableResolver, knownProviders []catwalk.Provider) error {
126 knownProviderNames := make(map[string]bool)
127 restore := PushPopCrushEnv()
128 defer restore()
129 for _, p := range knownProviders {
130 knownProviderNames[string(p.ID)] = true
131 config, configExists := c.Providers.Get(string(p.ID))
132 // if the user configured a known provider we need to allow it to override a couple of parameters
133 if configExists {
134 if config.Disable {
135 slog.Debug("Skipping provider due to disable flag", "provider", p.ID)
136 c.Providers.Del(string(p.ID))
137 continue
138 }
139 if config.BaseURL != "" {
140 p.APIEndpoint = config.BaseURL
141 }
142 if config.APIKey != "" {
143 p.APIKey = config.APIKey
144 }
145 if len(config.Models) > 0 {
146 models := []catwalk.Model{}
147 seen := make(map[string]bool)
148
149 for _, model := range config.Models {
150 if seen[model.ID] {
151 continue
152 }
153 seen[model.ID] = true
154 if model.Name == "" {
155 model.Name = model.ID
156 }
157 models = append(models, model)
158 }
159 for _, model := range p.Models {
160 if seen[model.ID] {
161 continue
162 }
163 seen[model.ID] = true
164 if model.Name == "" {
165 model.Name = model.ID
166 }
167 models = append(models, model)
168 }
169
170 p.Models = models
171 }
172 }
173
174 headers := map[string]string{}
175 if len(p.DefaultHeaders) > 0 {
176 maps.Copy(headers, p.DefaultHeaders)
177 }
178 if len(config.ExtraHeaders) > 0 {
179 maps.Copy(headers, config.ExtraHeaders)
180 }
181 prepared := ProviderConfig{
182 ID: string(p.ID),
183 Name: p.Name,
184 BaseURL: p.APIEndpoint,
185 APIKey: p.APIKey,
186 Type: p.Type,
187 Disable: config.Disable,
188 SystemPromptPrefix: config.SystemPromptPrefix,
189 ExtraHeaders: headers,
190 ExtraBody: config.ExtraBody,
191 ExtraParams: make(map[string]string),
192 Models: p.Models,
193 }
194
195 switch p.ID {
196 // Handle specific providers that require additional configuration
197 case catwalk.InferenceProviderVertexAI:
198 if !hasVertexCredentials(env) {
199 if configExists {
200 slog.Warn("Skipping Vertex AI provider due to missing credentials")
201 c.Providers.Del(string(p.ID))
202 }
203 continue
204 }
205 prepared.ExtraParams["project"] = env.Get("VERTEXAI_PROJECT")
206 prepared.ExtraParams["location"] = env.Get("VERTEXAI_LOCATION")
207 case catwalk.InferenceProviderAzure:
208 endpoint, err := resolver.ResolveValue(p.APIEndpoint)
209 if err != nil || endpoint == "" {
210 if configExists {
211 slog.Warn("Skipping Azure provider due to missing API endpoint", "provider", p.ID, "error", err)
212 c.Providers.Del(string(p.ID))
213 }
214 continue
215 }
216 prepared.BaseURL = endpoint
217 prepared.ExtraParams["apiVersion"] = env.Get("AZURE_OPENAI_API_VERSION")
218 case catwalk.InferenceProviderBedrock:
219 if !hasAWSCredentials(env) {
220 if configExists {
221 slog.Warn("Skipping Bedrock provider due to missing AWS credentials")
222 c.Providers.Del(string(p.ID))
223 }
224 continue
225 }
226 prepared.ExtraParams["region"] = env.Get("AWS_REGION")
227 if prepared.ExtraParams["region"] == "" {
228 prepared.ExtraParams["region"] = env.Get("AWS_DEFAULT_REGION")
229 }
230 for _, model := range p.Models {
231 if !strings.HasPrefix(model.ID, "anthropic.") {
232 return fmt.Errorf("bedrock provider only supports anthropic models for now, found: %s", model.ID)
233 }
234 }
235 default:
236 // if the provider api or endpoint are missing we skip them
237 v, err := resolver.ResolveValue(p.APIKey)
238 if v == "" || err != nil {
239 if configExists {
240 slog.Warn("Skipping provider due to missing API key", "provider", p.ID)
241 c.Providers.Del(string(p.ID))
242 }
243 continue
244 }
245 }
246 c.Providers.Set(string(p.ID), prepared)
247 }
248
249 // validate the custom providers
250 for id, providerConfig := range c.Providers.Seq2() {
251 if knownProviderNames[id] {
252 continue
253 }
254
255 // Make sure the provider ID is set
256 providerConfig.ID = id
257 if providerConfig.Name == "" {
258 providerConfig.Name = id // Use ID as name if not set
259 }
260 // default to OpenAI if not set
261 if providerConfig.Type == "" {
262 providerConfig.Type = catwalk.TypeOpenAI
263 }
264
265 if providerConfig.Disable {
266 slog.Debug("Skipping custom provider due to disable flag", "provider", id)
267 c.Providers.Del(id)
268 continue
269 }
270 if providerConfig.APIKey == "" {
271 slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
272 }
273 if providerConfig.BaseURL == "" {
274 slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id)
275 c.Providers.Del(id)
276 continue
277 }
278 if len(providerConfig.Models) == 0 {
279 slog.Warn("Skipping custom provider because the provider has no models", "provider", id)
280 c.Providers.Del(id)
281 continue
282 }
283 if providerConfig.Type != catwalk.TypeOpenAI && providerConfig.Type != catwalk.TypeAnthropic {
284 slog.Warn("Skipping custom provider because the provider type is not supported", "provider", id, "type", providerConfig.Type)
285 c.Providers.Del(id)
286 continue
287 }
288
289 apiKey, err := resolver.ResolveValue(providerConfig.APIKey)
290 if apiKey == "" || err != nil {
291 slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
292 }
293 baseURL, err := resolver.ResolveValue(providerConfig.BaseURL)
294 if baseURL == "" || err != nil {
295 slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id, "error", err)
296 c.Providers.Del(id)
297 continue
298 }
299
300 c.Providers.Set(id, providerConfig)
301 }
302 return nil
303}
304
305func (c *Config) setDefaults(workingDir, dataDir string) {
306 c.workingDir = workingDir
307 if c.Options == nil {
308 c.Options = &Options{}
309 }
310 if c.Options.TUI == nil {
311 c.Options.TUI = &TUIOptions{}
312 }
313 if c.Options.ContextPaths == nil {
314 c.Options.ContextPaths = []string{}
315 }
316 if dataDir != "" {
317 c.Options.DataDirectory = dataDir
318 } else if c.Options.DataDirectory == "" {
319 if path, ok := fsext.SearchParent(workingDir, defaultDataDirectory); ok {
320 c.Options.DataDirectory = path
321 } else {
322 c.Options.DataDirectory = filepath.Join(workingDir, defaultDataDirectory)
323 }
324 }
325 if c.Providers == nil {
326 c.Providers = csync.NewMap[string, ProviderConfig]()
327 }
328 if c.Models == nil {
329 c.Models = make(map[SelectedModelType]SelectedModel)
330 }
331 if c.MCP == nil {
332 c.MCP = make(map[string]MCPConfig)
333 }
334 if c.LSP == nil {
335 c.LSP = make(map[string]LSPConfig)
336 }
337
338 // Apply defaults to LSP configurations
339 c.applyLSPDefaults()
340
341 // Add the default context paths if they are not already present
342 c.Options.ContextPaths = append(defaultContextPaths, c.Options.ContextPaths...)
343 slices.Sort(c.Options.ContextPaths)
344 c.Options.ContextPaths = slices.Compact(c.Options.ContextPaths)
345
346 if str, ok := os.LookupEnv("CRUSH_DISABLE_PROVIDER_AUTO_UPDATE"); ok {
347 c.Options.DisableProviderAutoUpdate, _ = strconv.ParseBool(str)
348 }
349}
350
351// applyLSPDefaults applies default values from powernap to LSP configurations
352func (c *Config) applyLSPDefaults() {
353 // Get powernap's default configuration
354 configManager := powernapConfig.NewManager()
355 configManager.LoadDefaults()
356
357 // Apply defaults to each LSP configuration
358 for name, cfg := range c.LSP {
359 // Try to get defaults from powernap based on command name
360 base, ok := configManager.GetServer(cfg.Command)
361 if !ok {
362 continue
363 }
364 if cfg.Options == nil {
365 cfg.Options = base.Settings
366 }
367 if cfg.InitOptions == nil {
368 cfg.InitOptions = base.InitOptions
369 }
370 if len(cfg.FileTypes) == 0 {
371 cfg.FileTypes = base.FileTypes
372 }
373 if len(cfg.RootMarkers) == 0 {
374 cfg.RootMarkers = base.RootMarkers
375 }
376 // Update the config in the map
377 c.LSP[name] = cfg
378 }
379}
380
381func (c *Config) defaultModelSelection(knownProviders []catwalk.Provider) (largeModel SelectedModel, smallModel SelectedModel, err error) {
382 if len(knownProviders) == 0 && c.Providers.Len() == 0 {
383 err = fmt.Errorf("no providers configured, please configure at least one provider")
384 return
385 }
386
387 // Use the first provider enabled based on the known providers order
388 // if no provider found that is known use the first provider configured
389 for _, p := range knownProviders {
390 providerConfig, ok := c.Providers.Get(string(p.ID))
391 if !ok || providerConfig.Disable {
392 continue
393 }
394 defaultLargeModel := c.GetModel(string(p.ID), p.DefaultLargeModelID)
395 if defaultLargeModel == nil {
396 err = fmt.Errorf("default large model %s not found for provider %s", p.DefaultLargeModelID, p.ID)
397 return
398 }
399 largeModel = SelectedModel{
400 Provider: string(p.ID),
401 Model: defaultLargeModel.ID,
402 MaxTokens: defaultLargeModel.DefaultMaxTokens,
403 ReasoningEffort: defaultLargeModel.DefaultReasoningEffort,
404 }
405
406 defaultSmallModel := c.GetModel(string(p.ID), p.DefaultSmallModelID)
407 if defaultSmallModel == nil {
408 err = fmt.Errorf("default small model %s not found for provider %s", p.DefaultSmallModelID, p.ID)
409 return
410 }
411 smallModel = SelectedModel{
412 Provider: string(p.ID),
413 Model: defaultSmallModel.ID,
414 MaxTokens: defaultSmallModel.DefaultMaxTokens,
415 ReasoningEffort: defaultSmallModel.DefaultReasoningEffort,
416 }
417 return
418 }
419
420 enabledProviders := c.EnabledProviders()
421 slices.SortFunc(enabledProviders, func(a, b ProviderConfig) int {
422 return strings.Compare(a.ID, b.ID)
423 })
424
425 if len(enabledProviders) == 0 {
426 err = fmt.Errorf("no providers configured, please configure at least one provider")
427 return
428 }
429
430 providerConfig := enabledProviders[0]
431 if len(providerConfig.Models) == 0 {
432 err = fmt.Errorf("provider %s has no models configured", providerConfig.ID)
433 return
434 }
435 defaultLargeModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
436 largeModel = SelectedModel{
437 Provider: providerConfig.ID,
438 Model: defaultLargeModel.ID,
439 MaxTokens: defaultLargeModel.DefaultMaxTokens,
440 }
441 defaultSmallModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
442 smallModel = SelectedModel{
443 Provider: providerConfig.ID,
444 Model: defaultSmallModel.ID,
445 MaxTokens: defaultSmallModel.DefaultMaxTokens,
446 }
447 return
448}
449
450func (c *Config) configureSelectedModels(knownProviders []catwalk.Provider) error {
451 defaultLarge, defaultSmall, err := c.defaultModelSelection(knownProviders)
452 if err != nil {
453 return fmt.Errorf("failed to select default models: %w", err)
454 }
455 large, small := defaultLarge, defaultSmall
456
457 largeModelSelected, largeModelConfigured := c.Models[SelectedModelTypeLarge]
458 if largeModelConfigured {
459 if largeModelSelected.Model != "" {
460 large.Model = largeModelSelected.Model
461 }
462 if largeModelSelected.Provider != "" {
463 large.Provider = largeModelSelected.Provider
464 }
465 model := c.GetModel(large.Provider, large.Model)
466 if model == nil {
467 large = defaultLarge
468 // override the model type to large
469 err := c.UpdatePreferredModel(SelectedModelTypeLarge, large)
470 if err != nil {
471 return fmt.Errorf("failed to update preferred large model: %w", err)
472 }
473 } else {
474 if largeModelSelected.MaxTokens > 0 {
475 large.MaxTokens = largeModelSelected.MaxTokens
476 } else {
477 large.MaxTokens = model.DefaultMaxTokens
478 }
479 if largeModelSelected.ReasoningEffort != "" {
480 large.ReasoningEffort = largeModelSelected.ReasoningEffort
481 }
482 large.Think = largeModelSelected.Think
483 }
484 }
485 smallModelSelected, smallModelConfigured := c.Models[SelectedModelTypeSmall]
486 if smallModelConfigured {
487 if smallModelSelected.Model != "" {
488 small.Model = smallModelSelected.Model
489 }
490 if smallModelSelected.Provider != "" {
491 small.Provider = smallModelSelected.Provider
492 }
493
494 model := c.GetModel(small.Provider, small.Model)
495 if model == nil {
496 small = defaultSmall
497 // override the model type to small
498 err := c.UpdatePreferredModel(SelectedModelTypeSmall, small)
499 if err != nil {
500 return fmt.Errorf("failed to update preferred small model: %w", err)
501 }
502 } else {
503 if smallModelSelected.MaxTokens > 0 {
504 small.MaxTokens = smallModelSelected.MaxTokens
505 } else {
506 small.MaxTokens = model.DefaultMaxTokens
507 }
508 small.ReasoningEffort = smallModelSelected.ReasoningEffort
509 small.Think = smallModelSelected.Think
510 }
511 }
512 c.Models[SelectedModelTypeLarge] = large
513 c.Models[SelectedModelTypeSmall] = small
514 return nil
515}
516
517func loadFromConfigPaths(configPaths []string) (*Config, error) {
518 var configs []io.Reader
519
520 for _, path := range configPaths {
521 fd, err := os.Open(path)
522 if err != nil {
523 if os.IsNotExist(err) {
524 continue
525 }
526 return nil, fmt.Errorf("failed to open config file %s: %w", path, err)
527 }
528 defer fd.Close()
529
530 configs = append(configs, fd)
531 }
532
533 return loadFromReaders(configs)
534}
535
536func loadFromReaders(readers []io.Reader) (*Config, error) {
537 if len(readers) == 0 {
538 return &Config{}, nil
539 }
540
541 merged, err := Merge(readers)
542 if err != nil {
543 return nil, fmt.Errorf("failed to merge configuration readers: %w", err)
544 }
545
546 return LoadReader(merged)
547}
548
549func hasVertexCredentials(env env.Env) bool {
550 hasProject := env.Get("VERTEXAI_PROJECT") != ""
551 hasLocation := env.Get("VERTEXAI_LOCATION") != ""
552 return hasProject && hasLocation
553}
554
555func hasAWSCredentials(env env.Env) bool {
556 if env.Get("AWS_ACCESS_KEY_ID") != "" && env.Get("AWS_SECRET_ACCESS_KEY") != "" {
557 return true
558 }
559
560 if env.Get("AWS_PROFILE") != "" || env.Get("AWS_DEFAULT_PROFILE") != "" {
561 return true
562 }
563
564 if env.Get("AWS_REGION") != "" || env.Get("AWS_DEFAULT_REGION") != "" {
565 return true
566 }
567
568 if env.Get("AWS_CONTAINER_CREDENTIALS_RELATIVE_URI") != "" ||
569 env.Get("AWS_CONTAINER_CREDENTIALS_FULL_URI") != "" {
570 return true
571 }
572 return false
573}
574
575func globalConfig() string {
576 xdgConfigHome := os.Getenv("XDG_CONFIG_HOME")
577 if xdgConfigHome != "" {
578 return filepath.Join(xdgConfigHome, appName, fmt.Sprintf("%s.json", appName))
579 }
580
581 // return the path to the main config directory
582 // for windows, it should be in `%LOCALAPPDATA%/crush/`
583 // for linux and macOS, it should be in `$HOME/.config/crush/`
584 if runtime.GOOS == "windows" {
585 localAppData := os.Getenv("LOCALAPPDATA")
586 if localAppData == "" {
587 localAppData = filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local")
588 }
589 return filepath.Join(localAppData, appName, fmt.Sprintf("%s.json", appName))
590 }
591
592 return filepath.Join(home.Dir(), ".config", appName, fmt.Sprintf("%s.json", appName))
593}
594
595// GlobalConfigData returns the path to the main data directory for the application.
596// this config is used when the app overrides configurations instead of updating the global config.
597func GlobalConfigData() string {
598 xdgDataHome := os.Getenv("XDG_DATA_HOME")
599 if xdgDataHome != "" {
600 return filepath.Join(xdgDataHome, appName, fmt.Sprintf("%s.json", appName))
601 }
602
603 // return the path to the main data directory
604 // for windows, it should be in `%LOCALAPPDATA%/crush/`
605 // for linux and macOS, it should be in `$HOME/.local/share/crush/`
606 if runtime.GOOS == "windows" {
607 localAppData := os.Getenv("LOCALAPPDATA")
608 if localAppData == "" {
609 localAppData = filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local")
610 }
611 return filepath.Join(localAppData, appName, fmt.Sprintf("%s.json", appName))
612 }
613
614 return filepath.Join(home.Dir(), ".local", "share", appName, fmt.Sprintf("%s.json", appName))
615}