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