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