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