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 (c *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 := c.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(c.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(c.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.InferenceProviderAzure:
161 endpoint, err := resolver.ResolveValue(p.APIEndpoint)
162 if err != nil || endpoint == "" {
163 if configExists {
164 slog.Warn("Skipping Azure provider due to missing API endpoint", "provider", p.ID, "error", err)
165 delete(c.Providers, string(p.ID))
166 }
167 continue
168 }
169 prepared.BaseURL = endpoint
170 prepared.ExtraParams["apiVersion"] = env.Get("AZURE_OPENAI_API_VERSION")
171 case provider.InferenceProviderBedrock:
172 if !hasAWSCredentials(env) {
173 if configExists {
174 slog.Warn("Skipping Bedrock provider due to missing AWS credentials")
175 delete(c.Providers, string(p.ID))
176 }
177 continue
178 }
179 for _, model := range p.Models {
180 if !strings.HasPrefix(model.ID, "anthropic.") {
181 return fmt.Errorf("bedrock provider only supports anthropic models for now, found: %s", model.ID)
182 }
183 }
184 default:
185 // if the provider api or endpoint are missing we skip them
186 v, err := resolver.ResolveValue(p.APIKey)
187 if v == "" || err != nil {
188 if configExists {
189 slog.Warn("Skipping provider due to missing API key", "provider", p.ID)
190 delete(c.Providers, string(p.ID))
191 }
192 continue
193 }
194 }
195 c.Providers[string(p.ID)] = prepared
196 }
197
198 // validate the custom providers
199 for id, providerConfig := range c.Providers {
200 if knownProviderNames[id] {
201 continue
202 }
203
204 // Make sure the provider ID is set
205 providerConfig.ID = id
206 if providerConfig.Name == "" {
207 providerConfig.Name = id // Use ID as name if not set
208 }
209 // default to OpenAI if not set
210 if providerConfig.Type == "" {
211 providerConfig.Type = provider.TypeOpenAI
212 }
213
214 if providerConfig.Disable {
215 slog.Debug("Skipping custom provider due to disable flag", "provider", id)
216 delete(c.Providers, id)
217 continue
218 }
219 if providerConfig.APIKey == "" {
220 slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
221 }
222 if providerConfig.BaseURL == "" {
223 slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id)
224 delete(c.Providers, id)
225 continue
226 }
227 if len(providerConfig.Models) == 0 {
228 slog.Warn("Skipping custom provider because the provider has no models", "provider", id)
229 delete(c.Providers, id)
230 continue
231 }
232 if providerConfig.Type != provider.TypeOpenAI {
233 slog.Warn("Skipping custom provider because the provider type is not supported", "provider", id, "type", providerConfig.Type)
234 delete(c.Providers, id)
235 continue
236 }
237
238 apiKey, err := resolver.ResolveValue(providerConfig.APIKey)
239 if apiKey == "" || err != nil {
240 slog.Warn("Provider is missing API key, this might be OK for local providers", "provider", id)
241 }
242 baseURL, err := resolver.ResolveValue(providerConfig.BaseURL)
243 if baseURL == "" || err != nil {
244 slog.Warn("Skipping custom provider due to missing API endpoint", "provider", id, "error", err)
245 delete(c.Providers, id)
246 continue
247 }
248
249 c.Providers[id] = providerConfig
250 }
251 return nil
252}
253
254func (c *Config) setDefaults(workingDir string) {
255 c.workingDir = workingDir
256 if c.Options == nil {
257 c.Options = &Options{}
258 }
259 if c.Options.TUI == nil {
260 c.Options.TUI = &TUIOptions{}
261 }
262 if c.Options.ContextPaths == nil {
263 c.Options.ContextPaths = []string{}
264 }
265 if c.Options.DataDirectory == "" {
266 c.Options.DataDirectory = filepath.Join(workingDir, defaultDataDirectory)
267 }
268 if c.Providers == nil {
269 c.Providers = make(map[string]ProviderConfig)
270 }
271 if c.Models == nil {
272 c.Models = make(map[SelectedModelType]SelectedModel)
273 }
274 if c.MCP == nil {
275 c.MCP = make(map[string]MCPConfig)
276 }
277 if c.LSP == nil {
278 c.LSP = make(map[string]LSPConfig)
279 }
280
281 // Add the default context paths if they are not already present
282 c.Options.ContextPaths = append(defaultContextPaths, c.Options.ContextPaths...)
283 slices.Sort(c.Options.ContextPaths)
284 c.Options.ContextPaths = slices.Compact(c.Options.ContextPaths)
285}
286
287func (c *Config) defaultModelSelection(knownProviders []provider.Provider) (largeModel SelectedModel, smallModel SelectedModel, err error) {
288 if len(knownProviders) == 0 && len(c.Providers) == 0 {
289 err = fmt.Errorf("no providers configured, please configure at least one provider")
290 return
291 }
292
293 // Use the first provider enabled based on the known providers order
294 // if no provider found that is known use the first provider configured
295 for _, p := range knownProviders {
296 providerConfig, ok := c.Providers[string(p.ID)]
297 if !ok || providerConfig.Disable {
298 continue
299 }
300 defaultLargeModel := c.GetModel(string(p.ID), p.DefaultLargeModelID)
301 if defaultLargeModel == nil {
302 err = fmt.Errorf("default large model %s not found for provider %s", p.DefaultLargeModelID, p.ID)
303 return
304 }
305 largeModel = SelectedModel{
306 Provider: string(p.ID),
307 Model: defaultLargeModel.ID,
308 MaxTokens: defaultLargeModel.DefaultMaxTokens,
309 ReasoningEffort: defaultLargeModel.DefaultReasoningEffort,
310 }
311
312 defaultSmallModel := c.GetModel(string(p.ID), p.DefaultSmallModelID)
313 if defaultSmallModel == nil {
314 err = fmt.Errorf("default small model %s not found for provider %s", p.DefaultSmallModelID, p.ID)
315 return
316 }
317 smallModel = SelectedModel{
318 Provider: string(p.ID),
319 Model: defaultSmallModel.ID,
320 MaxTokens: defaultSmallModel.DefaultMaxTokens,
321 ReasoningEffort: defaultSmallModel.DefaultReasoningEffort,
322 }
323 return
324 }
325
326 enabledProviders := c.EnabledProviders()
327 slices.SortFunc(enabledProviders, func(a, b ProviderConfig) int {
328 return strings.Compare(a.ID, b.ID)
329 })
330
331 if len(enabledProviders) == 0 {
332 err = fmt.Errorf("no providers configured, please configure at least one provider")
333 return
334 }
335
336 providerConfig := enabledProviders[0]
337 if len(providerConfig.Models) == 0 {
338 err = fmt.Errorf("provider %s has no models configured", providerConfig.ID)
339 return
340 }
341 defaultLargeModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
342 largeModel = SelectedModel{
343 Provider: providerConfig.ID,
344 Model: defaultLargeModel.ID,
345 MaxTokens: defaultLargeModel.DefaultMaxTokens,
346 }
347 defaultSmallModel := c.GetModel(providerConfig.ID, providerConfig.Models[0].ID)
348 smallModel = SelectedModel{
349 Provider: providerConfig.ID,
350 Model: defaultSmallModel.ID,
351 MaxTokens: defaultSmallModel.DefaultMaxTokens,
352 }
353 return
354}
355
356func (c *Config) configureSelectedModels(knownProviders []provider.Provider) error {
357 defaultLarge, defaultSmall, err := c.defaultModelSelection(knownProviders)
358 if err != nil {
359 return fmt.Errorf("failed to select default models: %w", err)
360 }
361 large, small := defaultLarge, defaultSmall
362
363 largeModelSelected, largeModelConfigured := c.Models[SelectedModelTypeLarge]
364 if largeModelConfigured {
365 if largeModelSelected.Model != "" {
366 large.Model = largeModelSelected.Model
367 }
368 if largeModelSelected.Provider != "" {
369 large.Provider = largeModelSelected.Provider
370 }
371 model := c.GetModel(large.Provider, large.Model)
372 if model == nil {
373 large = defaultLarge
374 // override the model type to large
375 err := c.UpdatePreferredModel(SelectedModelTypeLarge, large)
376 if err != nil {
377 return fmt.Errorf("failed to update preferred large model: %w", err)
378 }
379 } else {
380 if largeModelSelected.MaxTokens > 0 {
381 large.MaxTokens = largeModelSelected.MaxTokens
382 } else {
383 large.MaxTokens = model.DefaultMaxTokens
384 }
385 if largeModelSelected.ReasoningEffort != "" {
386 large.ReasoningEffort = largeModelSelected.ReasoningEffort
387 }
388 large.Think = largeModelSelected.Think
389 }
390 }
391 smallModelSelected, smallModelConfigured := c.Models[SelectedModelTypeSmall]
392 if smallModelConfigured {
393 if smallModelSelected.Model != "" {
394 small.Model = smallModelSelected.Model
395 }
396 if smallModelSelected.Provider != "" {
397 small.Provider = smallModelSelected.Provider
398 }
399
400 model := c.GetModel(small.Provider, small.Model)
401 if model == nil {
402 small = defaultSmall
403 // override the model type to small
404 err := c.UpdatePreferredModel(SelectedModelTypeSmall, small)
405 if err != nil {
406 return fmt.Errorf("failed to update preferred small model: %w", err)
407 }
408 } else {
409 if smallModelSelected.MaxTokens > 0 {
410 small.MaxTokens = smallModelSelected.MaxTokens
411 } else {
412 small.MaxTokens = model.DefaultMaxTokens
413 }
414 small.ReasoningEffort = smallModelSelected.ReasoningEffort
415 small.Think = smallModelSelected.Think
416 }
417 }
418 c.Models[SelectedModelTypeLarge] = large
419 c.Models[SelectedModelTypeSmall] = small
420 return nil
421}
422
423func loadFromConfigPaths(configPaths []string) (*Config, error) {
424 var configs []io.Reader
425
426 for _, path := range configPaths {
427 fd, err := os.Open(path)
428 if err != nil {
429 if os.IsNotExist(err) {
430 continue
431 }
432 return nil, fmt.Errorf("failed to open config file %s: %w", path, err)
433 }
434 defer fd.Close()
435
436 configs = append(configs, fd)
437 }
438
439 return loadFromReaders(configs)
440}
441
442func loadFromReaders(readers []io.Reader) (*Config, error) {
443 if len(readers) == 0 {
444 return &Config{}, nil
445 }
446
447 merged, err := Merge(readers)
448 if err != nil {
449 return nil, fmt.Errorf("failed to merge configuration readers: %w", err)
450 }
451
452 return LoadReader(merged)
453}
454
455func hasVertexCredentials(env env.Env) bool {
456 useVertex := env.Get("GOOGLE_GENAI_USE_VERTEXAI") == "true"
457 hasProject := env.Get("GOOGLE_CLOUD_PROJECT") != ""
458 hasLocation := env.Get("GOOGLE_CLOUD_LOCATION") != ""
459 return useVertex && hasProject && hasLocation
460}
461
462func hasAWSCredentials(env env.Env) bool {
463 if env.Get("AWS_ACCESS_KEY_ID") != "" && env.Get("AWS_SECRET_ACCESS_KEY") != "" {
464 return true
465 }
466
467 if env.Get("AWS_PROFILE") != "" || env.Get("AWS_DEFAULT_PROFILE") != "" {
468 return true
469 }
470
471 if env.Get("AWS_REGION") != "" || env.Get("AWS_DEFAULT_REGION") != "" {
472 return true
473 }
474
475 if env.Get("AWS_CONTAINER_CREDENTIALS_RELATIVE_URI") != "" ||
476 env.Get("AWS_CONTAINER_CREDENTIALS_FULL_URI") != "" {
477 return true
478 }
479
480 return false
481}
482
483func globalConfig() string {
484 xdgConfigHome := os.Getenv("XDG_CONFIG_HOME")
485 if xdgConfigHome != "" {
486 return filepath.Join(xdgConfigHome, appName, fmt.Sprintf("%s.json", appName))
487 }
488
489 // return the path to the main config directory
490 // for windows, it should be in `%LOCALAPPDATA%/crush/`
491 // for linux and macOS, it should be in `$HOME/.config/crush/`
492 if runtime.GOOS == "windows" {
493 localAppData := os.Getenv("LOCALAPPDATA")
494 if localAppData == "" {
495 localAppData = filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local")
496 }
497 return filepath.Join(localAppData, appName, fmt.Sprintf("%s.json", appName))
498 }
499
500 return filepath.Join(os.Getenv("HOME"), ".config", appName, fmt.Sprintf("%s.json", appName))
501}
502
503// GlobalConfigData returns the path to the main data directory for the application.
504// this config is used when the app overrides configurations instead of updating the global config.
505func GlobalConfigData() string {
506 xdgDataHome := os.Getenv("XDG_DATA_HOME")
507 if xdgDataHome != "" {
508 return filepath.Join(xdgDataHome, appName, fmt.Sprintf("%s.json", appName))
509 }
510
511 // return the path to the main data directory
512 // for windows, it should be in `%LOCALAPPDATA%/crush/`
513 // for linux and macOS, it should be in `$HOME/.local/share/crush/`
514 if runtime.GOOS == "windows" {
515 localAppData := os.Getenv("LOCALAPPDATA")
516 if localAppData == "" {
517 localAppData = filepath.Join(os.Getenv("USERPROFILE"), "AppData", "Local")
518 }
519 return filepath.Join(localAppData, appName, fmt.Sprintf("%s.json", appName))
520 }
521
522 return filepath.Join(os.Getenv("HOME"), ".local", "share", appName, fmt.Sprintf("%s.json", appName))
523}
524
525func HomeDir() string {
526 homeDir := os.Getenv("HOME")
527 if homeDir == "" {
528 homeDir = os.Getenv("USERPROFILE") // For Windows compatibility
529 }
530 if homeDir == "" {
531 homeDir = os.Getenv("HOMEPATH") // Fallback for some environments
532 }
533 return homeDir
534}