1package config
2
3import (
4 "context"
5 "encoding/json"
6 "fmt"
7 "io"
8 "os"
9 "path/filepath"
10 "runtime"
11 "slices"
12 "strings"
13 "time"
14
15 "github.com/charmbracelet/crush/internal/env"
16 "github.com/charmbracelet/crush/internal/fur/client"
17 "github.com/charmbracelet/crush/internal/fur/provider"
18 "github.com/charmbracelet/crush/internal/log"
19 "github.com/charmbracelet/crush/internal/ollama"
20 "golang.org/x/exp/slog"
21)
22
23// LoadReader config via io.Reader.
24func LoadReader(fd io.Reader) (*Config, error) {
25 data, err := io.ReadAll(fd)
26 if err != nil {
27 return nil, err
28 }
29
30 var config Config
31 err = json.Unmarshal(data, &config)
32 if err != nil {
33 return nil, err
34 }
35 return &config, err
36}
37
38// Load loads the configuration from the default paths.
39func Load(workingDir string, debug bool) (*Config, error) {
40 // uses default config paths
41 configPaths := []string{
42 globalConfig(),
43 GlobalConfigData(),
44 filepath.Join(workingDir, fmt.Sprintf("%s.json", appName)),
45 filepath.Join(workingDir, fmt.Sprintf(".%s.json", appName)),
46 }
47 cfg, err := loadFromConfigPaths(configPaths)
48 if err != nil {
49 return nil, fmt.Errorf("failed to load config from paths %v: %w", configPaths, err)
50 }
51
52 cfg.dataConfigDir = GlobalConfigData()
53
54 cfg.setDefaults(workingDir)
55
56 if debug {
57 cfg.Options.Debug = true
58 }
59
60 // Setup logs
61 log.Setup(
62 filepath.Join(cfg.Options.DataDirectory, "logs", fmt.Sprintf("%s.log", appName)),
63 cfg.Options.Debug,
64 )
65
66 // Load known providers, this loads the config from fur
67 providers, err := LoadProviders(client.New())
68 if err != nil || len(providers) == 0 {
69 return nil, fmt.Errorf("failed to load providers: %w", err)
70 }
71 cfg.knownProviders = providers
72
73 env := env.New()
74 // Configure providers
75 valueResolver := NewShellVariableResolver(env)
76 cfg.resolver = valueResolver
77 if err := cfg.configureProviders(env, valueResolver, providers); err != nil {
78 return nil, fmt.Errorf("failed to configure providers: %w", err)
79 }
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 (cfg *Config) configureProviders(env env.Env, resolver VariableResolver, knownProviders []provider.Provider) error {
94 knownProviderNames := make(map[string]bool)
95 for _, p := range knownProviders {
96 knownProviderNames[string(p.ID)] = true
97 config, configExists := cfg.Providers[string(p.ID)]
98 // if the user configured a known provider we need to allow it to override a couple of parameters
99 if configExists {
100 if config.Disable {
101 slog.Debug("Skipping provider due to disable flag", "provider", p.ID)
102 delete(cfg.Providers, string(p.ID))
103 continue
104 }
105 if config.BaseURL != "" {
106 p.APIEndpoint = config.BaseURL
107 }
108 if config.APIKey != "" {
109 p.APIKey = config.APIKey
110 }
111 if len(config.Models) > 0 {
112 models := []provider.Model{}
113 seen := make(map[string]bool)
114
115 for _, model := range config.Models {
116 if seen[model.ID] {
117 continue
118 }
119 seen[model.ID] = true
120 if model.Model == "" {
121 model.Model = model.ID
122 }
123 models = append(models, model)
124 }
125 for _, model := range p.Models {
126 if seen[model.ID] {
127 continue
128 }
129 seen[model.ID] = true
130 if model.Model == "" {
131 model.Model = model.ID
132 }
133 models = append(models, model)
134 }
135
136 p.Models = models
137 }
138 }
139 prepared := ProviderConfig{
140 ID: string(p.ID),
141 Name: p.Name,
142 BaseURL: p.APIEndpoint,
143 APIKey: p.APIKey,
144 Type: p.Type,
145 Disable: config.Disable,
146 ExtraHeaders: config.ExtraHeaders,
147 ExtraParams: make(map[string]string),
148 Models: p.Models,
149 }
150
151 switch p.ID {
152 // Handle specific providers that require additional configuration
153 case provider.InferenceProviderVertexAI:
154 if !hasVertexCredentials(env) {
155 if configExists {
156 slog.Warn("Skipping Vertex AI provider due to missing credentials")
157 delete(cfg.Providers, string(p.ID))
158 }
159 continue
160 }
161 prepared.ExtraParams["project"] = env.Get("GOOGLE_CLOUD_PROJECT")
162 prepared.ExtraParams["location"] = env.Get("GOOGLE_CLOUD_LOCATION")
163 case provider.InferenceProviderBedrock:
164 if !hasAWSCredentials(env) {
165 if configExists {
166 slog.Warn("Skipping Bedrock provider due to missing AWS credentials")
167 delete(cfg.Providers, string(p.ID))
168 }
169 continue
170 }
171 for _, model := range p.Models {
172 if !strings.HasPrefix(model.ID, "anthropic.") {
173 return fmt.Errorf("bedrock provider only supports anthropic models for now, found: %s", model.ID)
174 }
175 }
176 default:
177 // if the provider api or endpoint are missing we skip them
178 v, err := resolver.ResolveValue(p.APIKey)
179 if v == "" || err != nil {
180 if configExists {
181 slog.Warn("Skipping provider due to missing API key", "provider", p.ID)
182 delete(cfg.Providers, string(p.ID))
183 }
184 continue
185 }
186 }
187 cfg.Providers[string(p.ID)] = prepared
188 }
189
190 // Auto-detect Ollama if it's available and not already configured
191 if _, exists := cfg.Providers["ollama"]; !exists {
192 ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
193 defer cancel()
194
195 // First try to get provider if Ollama is already running
196 if ollamaProvider, err := ollama.GetProvider(ctx); err == nil {
197 slog.Debug("Auto-detected running Ollama provider", "models", len(ollamaProvider.Models))
198 cfg.Providers["ollama"] = ProviderConfig{
199 ID: "ollama",
200 Name: "Ollama",
201 BaseURL: "http://localhost:11434/v1",
202 Type: provider.TypeOpenAI,
203 APIKey: "ollama",
204 Models: ollamaProvider.Models,
205 }
206 } else {
207 // If Ollama is not running, try to start it
208 if err := ollama.EnsureOllamaRunning(ctx); err == nil {
209 // Now try to get the provider again
210 if ollamaProvider, err := ollama.GetProvider(ctx); err == nil {
211 slog.Debug("Started Ollama service and detected provider", "models", len(ollamaProvider.Models))
212 cfg.Providers["ollama"] = ProviderConfig{
213 ID: "ollama",
214 Name: "Ollama",
215 BaseURL: "http://localhost:11434/v1",
216 Type: provider.TypeOpenAI,
217 APIKey: "ollama",
218 Models: ollamaProvider.Models,
219 }
220 } else {
221 slog.Debug("Started Ollama service but failed to get provider", "error", err)
222 }
223 } else {
224 slog.Debug("Failed to start Ollama service", "error", err)
225 }
226 }
227 }
228
229 // validate the custom providers
230 for id, providerConfig := range cfg.Providers {
231 if knownProviderNames[id] {
232 continue
233 }
234
235 // Make sure the provider ID is set
236 providerConfig.ID = id
237 if providerConfig.Name == "" {
238 providerConfig.Name = id // Use ID as name if not set
239 }
240 // default to OpenAI if not set
241 if providerConfig.Type == "" {
242 providerConfig.Type = provider.TypeOpenAI
243 }
244
245 if providerConfig.Disable {
246 slog.Debug("Skipping custom provider due to disable flag", "provider", id)
247 delete(cfg.Providers, id)
248 continue
249 }
250 if providerConfig.APIKey == "" {
251 slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
252 }
253 if providerConfig.BaseURL == "" {
254 slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id)
255 delete(cfg.Providers, id)
256 continue
257 }
258 if len(providerConfig.Models) == 0 {
259 slog.Warn("Skipping custom provider because the provider has no models", "provider", id)
260 delete(cfg.Providers, id)
261 continue
262 }
263 if providerConfig.Type != provider.TypeOpenAI {
264 slog.Warn("Skipping custom provider because the provider type is not supported", "provider", id, "type", providerConfig.Type)
265 delete(cfg.Providers, id)
266 continue
267 }
268
269 apiKey, err := resolver.ResolveValue(providerConfig.APIKey)
270 if apiKey == "" || err != nil {
271 slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
272 }
273 baseURL, err := resolver.ResolveValue(providerConfig.BaseURL)
274 if baseURL == "" || err != nil {
275 slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id, "error", err)
276 delete(cfg.Providers, id)
277 continue
278 }
279
280 cfg.Providers[id] = providerConfig
281 }
282 return nil
283}
284
285func (cfg *Config) setDefaults(workingDir string) {
286 cfg.workingDir = workingDir
287 if cfg.Options == nil {
288 cfg.Options = &Options{}
289 }
290 if cfg.Options.TUI == nil {
291 cfg.Options.TUI = &TUIOptions{}
292 }
293 if cfg.Options.ContextPaths == nil {
294 cfg.Options.ContextPaths = []string{}
295 }
296 if cfg.Options.DataDirectory == "" {
297 cfg.Options.DataDirectory = filepath.Join(workingDir, defaultDataDirectory)
298 }
299 if cfg.Providers == nil {
300 cfg.Providers = make(map[string]ProviderConfig)
301 }
302 if cfg.Models == nil {
303 cfg.Models = make(map[SelectedModelType]SelectedModel)
304 }
305 if cfg.MCP == nil {
306 cfg.MCP = make(map[string]MCPConfig)
307 }
308 if cfg.LSP == nil {
309 cfg.LSP = make(map[string]LSPConfig)
310 }
311
312 // Add the default context paths if they are not already present
313 cfg.Options.ContextPaths = append(defaultContextPaths, cfg.Options.ContextPaths...)
314 slices.Sort(cfg.Options.ContextPaths)
315 cfg.Options.ContextPaths = slices.Compact(cfg.Options.ContextPaths)
316}
317
318func (cfg *Config) defaultModelSelection(knownProviders []provider.Provider) (largeModel SelectedModel, smallModel SelectedModel, err error) {
319 if len(knownProviders) == 0 && len(cfg.Providers) == 0 {
320 err = fmt.Errorf("no providers configured, please configure at least one provider")
321 return
322 }
323
324 // Use the first provider enabled based on the known providers order
325 // if no provider found that is known use the first provider configured
326 for _, p := range knownProviders {
327 providerConfig, ok := cfg.Providers[string(p.ID)]
328 if !ok || providerConfig.Disable {
329 continue
330 }
331 defaultLargeModel := cfg.GetModel(string(p.ID), p.DefaultLargeModelID)
332 if defaultLargeModel == nil {
333 err = fmt.Errorf("default large model %s not found for provider %s", p.DefaultLargeModelID, p.ID)
334 return
335 }
336 largeModel = SelectedModel{
337 Provider: string(p.ID),
338 Model: defaultLargeModel.ID,
339 MaxTokens: defaultLargeModel.DefaultMaxTokens,
340 ReasoningEffort: defaultLargeModel.DefaultReasoningEffort,
341 }
342
343 defaultSmallModel := cfg.GetModel(string(p.ID), p.DefaultSmallModelID)
344 if defaultSmallModel == nil {
345 err = fmt.Errorf("default small model %s not found for provider %s", p.DefaultSmallModelID, p.ID)
346 return
347 }
348 smallModel = SelectedModel{
349 Provider: string(p.ID),
350 Model: defaultSmallModel.ID,
351 MaxTokens: defaultSmallModel.DefaultMaxTokens,
352 ReasoningEffort: defaultSmallModel.DefaultReasoningEffort,
353 }
354 return
355 }
356
357 enabledProviders := cfg.EnabledProviders()
358 slices.SortFunc(enabledProviders, func(a, b ProviderConfig) int {
359 return strings.Compare(a.ID, b.ID)
360 })
361
362 if len(enabledProviders) == 0 {
363 err = fmt.Errorf("no providers configured, please configure at least one provider")
364 return
365 }
366
367 providerConfig := enabledProviders[0]
368 if len(providerConfig.Models) == 0 {
369 err = fmt.Errorf("provider %s has no models configured", providerConfig.ID)
370 return
371 }
372 defaultLargeModel := cfg.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
373 largeModel = SelectedModel{
374 Provider: providerConfig.ID,
375 Model: defaultLargeModel.ID,
376 MaxTokens: defaultLargeModel.DefaultMaxTokens,
377 }
378 defaultSmallModel := cfg.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
379 smallModel = SelectedModel{
380 Provider: providerConfig.ID,
381 Model: defaultSmallModel.ID,
382 MaxTokens: defaultSmallModel.DefaultMaxTokens,
383 }
384 return
385}
386
387func (cfg *Config) configureSelectedModels(knownProviders []provider.Provider) error {
388 defaultLarge, defaultSmall, err := cfg.defaultModelSelection(knownProviders)
389 if err != nil {
390 return fmt.Errorf("failed to select default models: %w", err)
391 }
392 large, small := defaultLarge, defaultSmall
393
394 largeModelSelected, largeModelConfigured := cfg.Models[SelectedModelTypeLarge]
395 if largeModelConfigured {
396 if largeModelSelected.Model != "" {
397 large.Model = largeModelSelected.Model
398 }
399 if largeModelSelected.Provider != "" {
400 large.Provider = largeModelSelected.Provider
401 }
402 model := cfg.GetModel(large.Provider, large.Model)
403 if model == nil {
404 large = defaultLarge
405 // override the model type to large
406 err := cfg.UpdatePreferredModel(SelectedModelTypeLarge, large)
407 if err != nil {
408 return fmt.Errorf("failed to update preferred large model: %w", err)
409 }
410 } else {
411 if largeModelSelected.MaxTokens > 0 {
412 large.MaxTokens = largeModelSelected.MaxTokens
413 } else {
414 large.MaxTokens = model.DefaultMaxTokens
415 }
416 if largeModelSelected.ReasoningEffort != "" {
417 large.ReasoningEffort = largeModelSelected.ReasoningEffort
418 }
419 large.Think = largeModelSelected.Think
420 }
421 }
422 smallModelSelected, smallModelConfigured := cfg.Models[SelectedModelTypeSmall]
423 if smallModelConfigured {
424 if smallModelSelected.Model != "" {
425 small.Model = smallModelSelected.Model
426 }
427 if smallModelSelected.Provider != "" {
428 small.Provider = smallModelSelected.Provider
429 }
430
431 model := cfg.GetModel(small.Provider, small.Model)
432 if model == nil {
433 small = defaultSmall
434 // override the model type to small
435 err := cfg.UpdatePreferredModel(SelectedModelTypeSmall, small)
436 if err != nil {
437 return fmt.Errorf("failed to update preferred small model: %w", err)
438 }
439 } else {
440 if smallModelSelected.MaxTokens > 0 {
441 small.MaxTokens = smallModelSelected.MaxTokens
442 } else {
443 small.MaxTokens = model.DefaultMaxTokens
444 }
445 small.ReasoningEffort = smallModelSelected.ReasoningEffort
446 small.Think = smallModelSelected.Think
447 }
448 }
449 cfg.Models[SelectedModelTypeLarge] = large
450 cfg.Models[SelectedModelTypeSmall] = small
451 return nil
452}
453
454func loadFromConfigPaths(configPaths []string) (*Config, error) {
455 var configs []io.Reader
456
457 for _, path := range configPaths {
458 fd, err := os.Open(path)
459 if err != nil {
460 if os.IsNotExist(err) {
461 continue
462 }
463 return nil, fmt.Errorf("failed to open config file %s: %w", path, err)
464 }
465 defer fd.Close()
466
467 configs = append(configs, fd)
468 }
469
470 return loadFromReaders(configs)
471}
472
473func loadFromReaders(readers []io.Reader) (*Config, error) {
474 if len(readers) == 0 {
475 return &Config{}, nil
476 }
477
478 merged, err := Merge(readers)
479 if err != nil {
480 return nil, fmt.Errorf("failed to merge configuration readers: %w", err)
481 }
482
483 return LoadReader(merged)
484}
485
486func hasVertexCredentials(env env.Env) bool {
487 useVertex := env.Get("GOOGLE_GENAI_USE_VERTEXAI") == "true"
488 hasProject := env.Get("GOOGLE_CLOUD_PROJECT") != ""
489 hasLocation := env.Get("GOOGLE_CLOUD_LOCATION") != ""
490 return useVertex && hasProject && hasLocation
491}
492
493func hasAWSCredentials(env env.Env) bool {
494 if env.Get("AWS_ACCESS_KEY_ID") != "" && env.Get("AWS_SECRET_ACCESS_KEY") != "" {
495 return true
496 }
497
498 if env.Get("AWS_PROFILE") != "" || env.Get("AWS_DEFAULT_PROFILE") != "" {
499 return true
500 }
501
502 if env.Get("AWS_REGION") != "" || env.Get("AWS_DEFAULT_REGION") != "" {
503 return true
504 }
505
506 if env.Get("AWS_CONTAINER_CREDENTIALS_RELATIVE_URI") != "" ||
507 env.Get("AWS_CONTAINER_CREDENTIALS_FULL_URI") != "" {
508 return true
509 }
510
511 return false
512}
513
514func globalConfig() string {
515 xdgConfigHome := os.Getenv("XDG_CONFIG_HOME")
516 if xdgConfigHome != "" {
517 return filepath.Join(xdgConfigHome, appName, fmt.Sprintf("%s.json", appName))
518 }
519
520 // return the path to the main config directory
521 // for windows, it should be in `%LOCALAPPDATA%/crush/`
522 // for linux and macOS, it should be in `$HOME/.config/crush/`
523 if runtime.GOOS == "windows" {
524 localAppData := os.Getenv("LOCALAPPDATA")
525 if localAppData == "" {
526 localAppData = filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local")
527 }
528 return filepath.Join(localAppData, appName, fmt.Sprintf("%s.json", appName))
529 }
530
531 return filepath.Join(os.Getenv("HOME"), ".config", appName, fmt.Sprintf("%s.json", appName))
532}
533
534// GlobalConfigData returns the path to the main data directory for the application.
535// this config is used when the app overrides configurations instead of updating the global config.
536func GlobalConfigData() string {
537 xdgDataHome := os.Getenv("XDG_DATA_HOME")
538 if xdgDataHome != "" {
539 return filepath.Join(xdgDataHome, appName, fmt.Sprintf("%s.json", appName))
540 }
541
542 // return the path to the main data directory
543 // for windows, it should be in `%LOCALAPPDATA%/crush/`
544 // for linux and macOS, it should be in `$HOME/.local/share/crush/`
545 if runtime.GOOS == "windows" {
546 localAppData := os.Getenv("LOCALAPPDATA")
547 if localAppData == "" {
548 localAppData = filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local")
549 }
550 return filepath.Join(localAppData, appName, fmt.Sprintf("%s.json", appName))
551 }
552
553 return filepath.Join(os.Getenv("HOME"), ".local", "share", appName, fmt.Sprintf("%s.json", appName))
554}
555
556func HomeDir() string {
557 homeDir := os.Getenv("HOME")
558 if homeDir == "" {
559 homeDir = os.Getenv("USERPROFILE") // For Windows compatibility
560 }
561 if homeDir == "" {
562 homeDir = os.Getenv("HOMEPATH") // Fallback for some environments
563 }
564 return homeDir
565}