1package config
2
3import (
4 "encoding/json"
5 "fmt"
6 "io"
7 "log/slog"
8 "os"
9 "path/filepath"
10 "runtime"
11 "slices"
12 "strings"
13 "sync"
14
15 "github.com/charmbracelet/crush/internal/csync"
16 "github.com/charmbracelet/crush/internal/env"
17 "github.com/charmbracelet/crush/internal/fur/provider"
18 "github.com/charmbracelet/crush/internal/log"
19)
20
21// LoadReader config via io.Reader.
22func LoadReader(fd io.Reader) (*Config, error) {
23 data, err := io.ReadAll(fd)
24 if err != nil {
25 return nil, err
26 }
27
28 var config Config
29 err = json.Unmarshal(data, &config)
30 if err != nil {
31 return nil, err
32 }
33 return &config, err
34}
35
36// Load loads the configuration from the default paths.
37func Load(workingDir string, debug bool) (*Config, error) {
38 // uses default config paths
39 configPaths := []string{
40 globalConfig(),
41 GlobalConfigData(),
42 filepath.Join(workingDir, fmt.Sprintf("%s.json", appName)),
43 filepath.Join(workingDir, fmt.Sprintf(".%s.json", appName)),
44 }
45 cfg, err := loadFromConfigPaths(configPaths)
46 if err != nil {
47 return nil, fmt.Errorf("failed to load config from paths %v: %w", configPaths, err)
48 }
49
50 cfg.dataConfigDir = GlobalConfigData()
51
52 cfg.setDefaults(workingDir)
53
54 if debug {
55 cfg.Options.Debug = true
56 }
57
58 // Setup logs
59 log.Setup(
60 filepath.Join(cfg.Options.DataDirectory, "logs", fmt.Sprintf("%s.log", appName)),
61 cfg.Options.Debug,
62 )
63
64 // Load known providers, this loads the config from fur
65 providers, err := Providers()
66 if err != nil || len(providers) == 0 {
67 return nil, fmt.Errorf("failed to load providers: %w", err)
68 }
69 cfg.knownProviders = providers
70
71 env := env.New()
72 // Configure providers
73 valueResolver := NewShellVariableResolver(env)
74 cfg.resolver = valueResolver
75 if err := cfg.configureProviders(env, valueResolver, providers); err != nil {
76 return nil, fmt.Errorf("failed to configure providers: %w", err)
77 }
78
79 go cfg.removeUnresponsiveProviders()
80
81 if !cfg.IsConfigured() {
82 slog.Warn("No providers configured")
83 return cfg, nil
84 }
85
86 if err := cfg.configureSelectedModels(providers); err != nil {
87 return nil, fmt.Errorf("failed to configure selected models: %w", err)
88 }
89 cfg.SetupAgents()
90 return cfg, nil
91}
92
93func (c *Config) removeUnresponsiveProviders() {
94 // Test provider connections in parallel
95 var testResults sync.Map
96 var wg sync.WaitGroup
97 slog.Info("Testing provider connections")
98 defer slog.Info("Provider connection tests completed")
99 for _, p := range c.Providers.Seq2() {
100 if p.Type == provider.TypeOpenAI || p.Type == provider.TypeAnthropic {
101 wg.Add(1)
102 go func(provider ProviderConfig) {
103 defer wg.Done()
104 err := provider.TestConnection(c.resolver)
105 testResults.Store(provider.ID, err == nil)
106 if err != nil {
107 slog.Error("Provider connection test failed", "provider", provider.ID, "error", err)
108 }
109 }(p)
110 }
111 }
112 wg.Wait()
113
114 // Remove failed providers
115 testResults.Range(func(key, value any) bool {
116 providerID := key.(string)
117 passed := value.(bool)
118 if !passed {
119 c.Providers.Del(providerID)
120 }
121 return true
122 })
123}
124
125func (c *Config) configureProviders(env env.Env, resolver VariableResolver, knownProviders []provider.Provider) error {
126 knownProviderNames := make(map[string]bool)
127 for _, p := range knownProviders {
128 knownProviderNames[string(p.ID)] = true
129 config, configExists := c.Providers.Get(string(p.ID))
130 // if the user configured a known provider we need to allow it to override a couple of parameters
131 if configExists {
132 if config.Disable {
133 slog.Debug("Skipping provider due to disable flag", "provider", p.ID)
134 c.Providers.Del(string(p.ID))
135 continue
136 }
137 if config.BaseURL != "" {
138 p.APIEndpoint = config.BaseURL
139 }
140 if config.APIKey != "" {
141 p.APIKey = config.APIKey
142 }
143 if len(config.Models) > 0 {
144 models := []provider.Model{}
145 seen := make(map[string]bool)
146
147 for _, model := range config.Models {
148 if seen[model.ID] {
149 continue
150 }
151 seen[model.ID] = true
152 if model.Model == "" {
153 model.Model = model.ID
154 }
155 models = append(models, model)
156 }
157 for _, model := range p.Models {
158 if seen[model.ID] {
159 continue
160 }
161 seen[model.ID] = true
162 if model.Model == "" {
163 model.Model = model.ID
164 }
165 models = append(models, model)
166 }
167
168 p.Models = models
169 }
170 }
171 prepared := ProviderConfig{
172 ID: string(p.ID),
173 Name: p.Name,
174 BaseURL: p.APIEndpoint,
175 APIKey: p.APIKey,
176 Type: p.Type,
177 Disable: config.Disable,
178 ExtraHeaders: config.ExtraHeaders,
179 ExtraBody: config.ExtraBody,
180 ExtraParams: make(map[string]string),
181 Models: p.Models,
182 }
183
184 switch p.ID {
185 // Handle specific providers that require additional configuration
186 case provider.InferenceProviderVertexAI:
187 if !hasVertexCredentials(env) {
188 if configExists {
189 slog.Warn("Skipping Vertex AI provider due to missing credentials")
190 c.Providers.Del(string(p.ID))
191 }
192 continue
193 }
194 prepared.ExtraParams["project"] = env.Get("GOOGLE_CLOUD_PROJECT")
195 prepared.ExtraParams["location"] = env.Get("GOOGLE_CLOUD_LOCATION")
196 case provider.InferenceProviderAzure:
197 endpoint, err := resolver.ResolveValue(p.APIEndpoint)
198 if err != nil || endpoint == "" {
199 if configExists {
200 slog.Warn("Skipping Azure provider due to missing API endpoint", "provider", p.ID, "error", err)
201 c.Providers.Del(string(p.ID))
202 }
203 continue
204 }
205 prepared.BaseURL = endpoint
206 prepared.ExtraParams["apiVersion"] = env.Get("AZURE_OPENAI_API_VERSION")
207 case provider.InferenceProviderBedrock:
208 if !hasAWSCredentials(env) {
209 if configExists {
210 slog.Warn("Skipping Bedrock provider due to missing AWS credentials")
211 c.Providers.Del(string(p.ID))
212 }
213 continue
214 }
215 for _, model := range p.Models {
216 if !strings.HasPrefix(model.ID, "anthropic.") {
217 return fmt.Errorf("bedrock provider only supports anthropic models for now, found: %s", model.ID)
218 }
219 }
220 default:
221 // if the provider api or endpoint are missing we skip them
222 v, err := resolver.ResolveValue(p.APIKey)
223 if v == "" || err != nil {
224 if configExists {
225 slog.Warn("Skipping provider due to missing API key", "provider", p.ID)
226 c.Providers.Del(string(p.ID))
227 }
228 continue
229 }
230 }
231 c.Providers.Set(string(p.ID), prepared)
232 }
233
234 // validate the custom providers
235 for id, providerConfig := range c.Providers.Seq2() {
236 if knownProviderNames[id] {
237 continue
238 }
239
240 // Make sure the provider ID is set
241 providerConfig.ID = id
242 if providerConfig.Name == "" {
243 providerConfig.Name = id // Use ID as name if not set
244 }
245 // default to OpenAI if not set
246 if providerConfig.Type == "" {
247 providerConfig.Type = provider.TypeOpenAI
248 }
249
250 if providerConfig.Disable {
251 slog.Debug("Skipping custom provider due to disable flag", "provider", id)
252 c.Providers.Del(id)
253 continue
254 }
255 if providerConfig.APIKey == "" {
256 slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
257 }
258 if providerConfig.BaseURL == "" {
259 slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id)
260 c.Providers.Del(id)
261 continue
262 }
263 if len(providerConfig.Models) == 0 {
264 slog.Warn("Skipping custom provider because the provider has no models", "provider", id)
265 c.Providers.Del(id)
266 continue
267 }
268 if providerConfig.Type != provider.TypeOpenAI {
269 slog.Warn("Skipping custom provider because the provider type is not supported", "provider", id, "type", providerConfig.Type)
270 c.Providers.Del(id)
271 continue
272 }
273
274 apiKey, err := resolver.ResolveValue(providerConfig.APIKey)
275 if apiKey == "" || err != nil {
276 slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
277 }
278 baseURL, err := resolver.ResolveValue(providerConfig.BaseURL)
279 if baseURL == "" || err != nil {
280 slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id, "error", err)
281 c.Providers.Del(id)
282 continue
283 }
284
285 c.Providers.Set(id, providerConfig)
286 }
287 return nil
288}
289
290func (c *Config) setDefaults(workingDir string) {
291 c.workingDir = workingDir
292 if c.Options == nil {
293 c.Options = &Options{}
294 }
295 if c.Options.TUI == nil {
296 c.Options.TUI = &TUIOptions{}
297 }
298 if c.Options.ContextPaths == nil {
299 c.Options.ContextPaths = []string{}
300 }
301 if c.Options.DataDirectory == "" {
302 c.Options.DataDirectory = filepath.Join(workingDir, defaultDataDirectory)
303 }
304 if c.Providers == nil {
305 c.Providers = csync.NewMap[string, ProviderConfig]()
306 }
307 if c.Models == nil {
308 c.Models = make(map[SelectedModelType]SelectedModel)
309 }
310 if c.MCP == nil {
311 c.MCP = make(map[string]MCPConfig)
312 }
313 if c.LSP == nil {
314 c.LSP = make(map[string]LSPConfig)
315 }
316
317 // Add the default context paths if they are not already present
318 c.Options.ContextPaths = append(defaultContextPaths, c.Options.ContextPaths...)
319 slices.Sort(c.Options.ContextPaths)
320 c.Options.ContextPaths = slices.Compact(c.Options.ContextPaths)
321}
322
323func (c *Config) defaultModelSelection(knownProviders []provider.Provider) (largeModel SelectedModel, smallModel SelectedModel, err error) {
324 if len(knownProviders) == 0 && c.Providers.Len() == 0 {
325 err = fmt.Errorf("no providers configured, please configure at least one provider")
326 return
327 }
328
329 // Use the first provider enabled based on the known providers order
330 // if no provider found that is known use the first provider configured
331 for _, p := range knownProviders {
332 providerConfig, ok := c.Providers.Get(string(p.ID))
333 if !ok || providerConfig.Disable {
334 continue
335 }
336 defaultLargeModel := c.GetModel(string(p.ID), p.DefaultLargeModelID)
337 if defaultLargeModel == nil {
338 err = fmt.Errorf("default large model %s not found for provider %s", p.DefaultLargeModelID, p.ID)
339 return
340 }
341 largeModel = SelectedModel{
342 Provider: string(p.ID),
343 Model: defaultLargeModel.ID,
344 MaxTokens: defaultLargeModel.DefaultMaxTokens,
345 ReasoningEffort: defaultLargeModel.DefaultReasoningEffort,
346 }
347
348 defaultSmallModel := c.GetModel(string(p.ID), p.DefaultSmallModelID)
349 if defaultSmallModel == nil {
350 err = fmt.Errorf("default small model %s not found for provider %s", p.DefaultSmallModelID, p.ID)
351 return
352 }
353 smallModel = SelectedModel{
354 Provider: string(p.ID),
355 Model: defaultSmallModel.ID,
356 MaxTokens: defaultSmallModel.DefaultMaxTokens,
357 ReasoningEffort: defaultSmallModel.DefaultReasoningEffort,
358 }
359 return
360 }
361
362 enabledProviders := c.EnabledProviders()
363 slices.SortFunc(enabledProviders, func(a, b ProviderConfig) int {
364 return strings.Compare(a.ID, b.ID)
365 })
366
367 if len(enabledProviders) == 0 {
368 err = fmt.Errorf("no providers configured, please configure at least one provider")
369 return
370 }
371
372 providerConfig := enabledProviders[0]
373 if len(providerConfig.Models) == 0 {
374 err = fmt.Errorf("provider %s has no models configured", providerConfig.ID)
375 return
376 }
377 defaultLargeModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
378 largeModel = SelectedModel{
379 Provider: providerConfig.ID,
380 Model: defaultLargeModel.ID,
381 MaxTokens: defaultLargeModel.DefaultMaxTokens,
382 }
383 defaultSmallModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
384 smallModel = SelectedModel{
385 Provider: providerConfig.ID,
386 Model: defaultSmallModel.ID,
387 MaxTokens: defaultSmallModel.DefaultMaxTokens,
388 }
389 return
390}
391
392func (c *Config) configureSelectedModels(knownProviders []provider.Provider) error {
393 defaultLarge, defaultSmall, err := c.defaultModelSelection(knownProviders)
394 if err != nil {
395 return fmt.Errorf("failed to select default models: %w", err)
396 }
397 large, small := defaultLarge, defaultSmall
398
399 largeModelSelected, largeModelConfigured := c.Models[SelectedModelTypeLarge]
400 if largeModelConfigured {
401 if largeModelSelected.Model != "" {
402 large.Model = largeModelSelected.Model
403 }
404 if largeModelSelected.Provider != "" {
405 large.Provider = largeModelSelected.Provider
406 }
407 model := c.GetModel(large.Provider, large.Model)
408 if model == nil {
409 large = defaultLarge
410 // override the model type to large
411 err := c.UpdatePreferredModel(SelectedModelTypeLarge, large)
412 if err != nil {
413 return fmt.Errorf("failed to update preferred large model: %w", err)
414 }
415 } else {
416 if largeModelSelected.MaxTokens > 0 {
417 large.MaxTokens = largeModelSelected.MaxTokens
418 } else {
419 large.MaxTokens = model.DefaultMaxTokens
420 }
421 if largeModelSelected.ReasoningEffort != "" {
422 large.ReasoningEffort = largeModelSelected.ReasoningEffort
423 }
424 large.Think = largeModelSelected.Think
425 }
426 }
427 smallModelSelected, smallModelConfigured := c.Models[SelectedModelTypeSmall]
428 if smallModelConfigured {
429 if smallModelSelected.Model != "" {
430 small.Model = smallModelSelected.Model
431 }
432 if smallModelSelected.Provider != "" {
433 small.Provider = smallModelSelected.Provider
434 }
435
436 model := c.GetModel(small.Provider, small.Model)
437 if model == nil {
438 small = defaultSmall
439 // override the model type to small
440 err := c.UpdatePreferredModel(SelectedModelTypeSmall, small)
441 if err != nil {
442 return fmt.Errorf("failed to update preferred small model: %w", err)
443 }
444 } else {
445 if smallModelSelected.MaxTokens > 0 {
446 small.MaxTokens = smallModelSelected.MaxTokens
447 } else {
448 small.MaxTokens = model.DefaultMaxTokens
449 }
450 small.ReasoningEffort = smallModelSelected.ReasoningEffort
451 small.Think = smallModelSelected.Think
452 }
453 }
454 c.Models[SelectedModelTypeLarge] = large
455 c.Models[SelectedModelTypeSmall] = small
456 return nil
457}
458
459func loadFromConfigPaths(configPaths []string) (*Config, error) {
460 var configs []io.Reader
461
462 for _, path := range configPaths {
463 fd, err := os.Open(path)
464 if err != nil {
465 if os.IsNotExist(err) {
466 continue
467 }
468 return nil, fmt.Errorf("failed to open config file %s: %w", path, err)
469 }
470 defer fd.Close()
471
472 configs = append(configs, fd)
473 }
474
475 return loadFromReaders(configs)
476}
477
478func loadFromReaders(readers []io.Reader) (*Config, error) {
479 if len(readers) == 0 {
480 return &Config{}, nil
481 }
482
483 merged, err := Merge(readers)
484 if err != nil {
485 return nil, fmt.Errorf("failed to merge configuration readers: %w", err)
486 }
487
488 return LoadReader(merged)
489}
490
491func hasVertexCredentials(env env.Env) bool {
492 useVertex := env.Get("GOOGLE_GENAI_USE_VERTEXAI") == "true"
493 hasProject := env.Get("GOOGLE_CLOUD_PROJECT") != ""
494 hasLocation := env.Get("GOOGLE_CLOUD_LOCATION") != ""
495 return useVertex && hasProject && hasLocation
496}
497
498func hasAWSCredentials(env env.Env) bool {
499 if env.Get("AWS_ACCESS_KEY_ID") != "" && env.Get("AWS_SECRET_ACCESS_KEY") != "" {
500 return true
501 }
502
503 if env.Get("AWS_PROFILE") != "" || env.Get("AWS_DEFAULT_PROFILE") != "" {
504 return true
505 }
506
507 if env.Get("AWS_REGION") != "" || env.Get("AWS_DEFAULT_REGION") != "" {
508 return true
509 }
510
511 if env.Get("AWS_CONTAINER_CREDENTIALS_RELATIVE_URI") != "" ||
512 env.Get("AWS_CONTAINER_CREDENTIALS_FULL_URI") != "" {
513 return true
514 }
515
516 return false
517}
518
519func globalConfig() string {
520 xdgConfigHome := os.Getenv("XDG_CONFIG_HOME")
521 if xdgConfigHome != "" {
522 return filepath.Join(xdgConfigHome, appName, fmt.Sprintf("%s.json", appName))
523 }
524
525 // return the path to the main config directory
526 // for windows, it should be in `%LOCALAPPDATA%/crush/`
527 // for linux and macOS, it should be in `$HOME/.config/crush/`
528 if runtime.GOOS == "windows" {
529 localAppData := os.Getenv("LOCALAPPDATA")
530 if localAppData == "" {
531 localAppData = filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local")
532 }
533 return filepath.Join(localAppData, appName, fmt.Sprintf("%s.json", appName))
534 }
535
536 return filepath.Join(os.Getenv("HOME"), ".config", appName, fmt.Sprintf("%s.json", appName))
537}
538
539// GlobalConfigData returns the path to the main data directory for the application.
540// this config is used when the app overrides configurations instead of updating the global config.
541func GlobalConfigData() string {
542 xdgDataHome := os.Getenv("XDG_DATA_HOME")
543 if xdgDataHome != "" {
544 return filepath.Join(xdgDataHome, appName, fmt.Sprintf("%s.json", appName))
545 }
546
547 // return the path to the main data directory
548 // for windows, it should be in `%LOCALAPPDATA%/crush/`
549 // for linux and macOS, it should be in `$HOME/.local/share/crush/`
550 if runtime.GOOS == "windows" {
551 localAppData := os.Getenv("LOCALAPPDATA")
552 if localAppData == "" {
553 localAppData = filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local")
554 }
555 return filepath.Join(localAppData, appName, fmt.Sprintf("%s.json", appName))
556 }
557
558 return filepath.Join(os.Getenv("HOME"), ".local", "share", appName, fmt.Sprintf("%s.json", appName))
559}
560
561func HomeDir() string {
562 homeDir := os.Getenv("HOME")
563 if homeDir == "" {
564 homeDir = os.Getenv("USERPROFILE") // For Windows compatibility
565 }
566 if homeDir == "" {
567 homeDir = os.Getenv("HOMEPATH") // Fallback for some environments
568 }
569 return homeDir
570}