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