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