1package config
2
3import (
4 "context"
5 "fmt"
6 "net/http"
7 "os"
8 "slices"
9 "strings"
10 "time"
11
12 "github.com/charmbracelet/crush/internal/csync"
13 "github.com/charmbracelet/crush/internal/env"
14 "github.com/charmbracelet/crush/internal/fur/provider"
15 "github.com/tidwall/sjson"
16 "golang.org/x/exp/slog"
17)
18
19const (
20 appName = "crush"
21 defaultDataDirectory = ".crush"
22 defaultLogLevel = "info"
23)
24
25var defaultContextPaths = []string{
26 ".github/copilot-instructions.md",
27 ".cursorrules",
28 ".cursor/rules/",
29 "CLAUDE.md",
30 "CLAUDE.local.md",
31 "GEMINI.md",
32 "gemini.md",
33 "crush.md",
34 "crush.local.md",
35 "Crush.md",
36 "Crush.local.md",
37 "CRUSH.md",
38 "CRUSH.local.md",
39}
40
41type SelectedModelType string
42
43const (
44 SelectedModelTypeLarge SelectedModelType = "large"
45 SelectedModelTypeSmall SelectedModelType = "small"
46)
47
48type SelectedModel struct {
49 // The model id as used by the provider API.
50 // Required.
51 Model string `json:"model"`
52 // The model provider, same as the key/id used in the providers config.
53 // Required.
54 Provider string `json:"provider"`
55
56 // Only used by models that use the openai provider and need this set.
57 ReasoningEffort string `json:"reasoning_effort,omitempty"`
58
59 // Overrides the default model configuration.
60 MaxTokens int64 `json:"max_tokens,omitempty"`
61
62 // Used by anthropic models that can reason to indicate if the model should think.
63 Think bool `json:"think,omitempty"`
64}
65
66type ProviderConfig struct {
67 // The provider's id.
68 ID string `json:"id,omitempty"`
69 // The provider's name, used for display purposes.
70 Name string `json:"name,omitempty"`
71 // The provider's API endpoint.
72 BaseURL string `json:"base_url,omitempty"`
73 // The provider type, e.g. "openai", "anthropic", etc. if empty it defaults to openai.
74 Type provider.Type `json:"type,omitempty"`
75 // The provider's API key.
76 APIKey string `json:"api_key,omitempty"`
77 // Marks the provider as disabled.
78 Disable bool `json:"disable,omitempty"`
79
80 // Extra headers to send with each request to the provider.
81 ExtraHeaders map[string]string `json:"extra_headers,omitempty"`
82 // Extra body
83 ExtraBody map[string]any `json:"extra_body,omitempty"`
84
85 // Used to pass extra parameters to the provider.
86 ExtraParams map[string]string `json:"-"`
87
88 // The provider models
89 Models []provider.Model `json:"models,omitempty"`
90}
91
92type MCPType string
93
94const (
95 MCPStdio MCPType = "stdio"
96 MCPSse MCPType = "sse"
97 MCPHttp MCPType = "http"
98)
99
100type MCPConfig struct {
101 Command string `json:"command,omitempty" `
102 Env map[string]string `json:"env,omitempty"`
103 Args []string `json:"args,omitempty"`
104 Type MCPType `json:"type"`
105 URL string `json:"url,omitempty"`
106 Disabled bool `json:"disabled,omitempty"`
107
108 // TODO: maybe make it possible to get the value from the env
109 Headers map[string]string `json:"headers,omitempty"`
110}
111
112type LSPConfig struct {
113 Disabled bool `json:"enabled,omitempty"`
114 Command string `json:"command"`
115 Args []string `json:"args,omitempty"`
116 Options any `json:"options,omitempty"`
117}
118
119type TUIOptions struct {
120 CompactMode bool `json:"compact_mode,omitempty"`
121 // Here we can add themes later or any TUI related options
122}
123
124type Options struct {
125 ContextPaths []string `json:"context_paths,omitempty"`
126 TUI *TUIOptions `json:"tui,omitempty"`
127 Debug bool `json:"debug,omitempty"`
128 DebugLSP bool `json:"debug_lsp,omitempty"`
129 DisableAutoSummarize bool `json:"disable_auto_summarize,omitempty"`
130 DataDirectory string `json:"data_directory,omitempty"` // Relative to the cwd
131 SkipPermissionsRequests bool `json:"-"` // Automatically accept all permissions (YOLO mode)
132}
133
134type MCPs map[string]MCPConfig
135
136type MCP struct {
137 Name string `json:"name"`
138 MCP MCPConfig `json:"mcp"`
139}
140
141func (m MCPs) Sorted() []MCP {
142 sorted := make([]MCP, 0, len(m))
143 for k, v := range m {
144 sorted = append(sorted, MCP{
145 Name: k,
146 MCP: v,
147 })
148 }
149 slices.SortFunc(sorted, func(a, b MCP) int {
150 return strings.Compare(a.Name, b.Name)
151 })
152 return sorted
153}
154
155type LSPs map[string]LSPConfig
156
157type LSP struct {
158 Name string `json:"name"`
159 LSP LSPConfig `json:"lsp"`
160}
161
162func (l LSPs) Sorted() []LSP {
163 sorted := make([]LSP, 0, len(l))
164 for k, v := range l {
165 sorted = append(sorted, LSP{
166 Name: k,
167 LSP: v,
168 })
169 }
170 slices.SortFunc(sorted, func(a, b LSP) int {
171 return strings.Compare(a.Name, b.Name)
172 })
173 return sorted
174}
175
176func (m MCPConfig) ResolvedEnv() []string {
177 resolver := NewShellVariableResolver(env.New())
178 for e, v := range m.Env {
179 var err error
180 m.Env[e], err = resolver.ResolveValue(v)
181 if err != nil {
182 slog.Error("error resolving environment variable", "error", err, "variable", e, "value", v)
183 continue
184 }
185 }
186
187 env := make([]string, 0, len(m.Env))
188 for k, v := range m.Env {
189 env = append(env, fmt.Sprintf("%s=%s", k, v))
190 }
191 return env
192}
193
194func (m MCPConfig) ResolvedHeaders() map[string]string {
195 resolver := NewShellVariableResolver(env.New())
196 for e, v := range m.Headers {
197 var err error
198 m.Headers[e], err = resolver.ResolveValue(v)
199 if err != nil {
200 slog.Error("error resolving header variable", "error", err, "variable", e, "value", v)
201 continue
202 }
203 }
204 return m.Headers
205}
206
207type Agent struct {
208 ID string `json:"id,omitempty"`
209 Name string `json:"name,omitempty"`
210 Description string `json:"description,omitempty"`
211 // This is the id of the system prompt used by the agent
212 Disabled bool `json:"disabled,omitempty"`
213
214 Model SelectedModelType `json:"model"`
215
216 // The available tools for the agent
217 // if this is nil, all tools are available
218 AllowedTools []string `json:"allowed_tools,omitempty"`
219
220 // this tells us which MCPs are available for this agent
221 // if this is empty all mcps are available
222 // the string array is the list of tools from the AllowedMCP the agent has available
223 // if the string array is nil, all tools from the AllowedMCP are available
224 AllowedMCP map[string][]string `json:"allowed_mcp,omitempty"`
225
226 // The list of LSPs that this agent can use
227 // if this is nil, all LSPs are available
228 AllowedLSP []string `json:"allowed_lsp,omitempty"`
229
230 // Overrides the context paths for this agent
231 ContextPaths []string `json:"context_paths,omitempty"`
232}
233
234// Config holds the configuration for crush.
235type Config struct {
236 // We currently only support large/small as values here.
237 Models map[SelectedModelType]SelectedModel `json:"models,omitempty"`
238
239 // The providers that are configured
240 Providers *csync.Map[string, ProviderConfig] `json:"providers,omitempty"`
241
242 MCP MCPs `json:"mcp,omitempty"`
243
244 LSP LSPs `json:"lsp,omitempty"`
245
246 Options *Options `json:"options,omitempty"`
247
248 // Internal
249 workingDir string `json:"-"`
250 // TODO: most likely remove this concept when I come back to it
251 Agents map[string]Agent `json:"-"`
252 // TODO: find a better way to do this this should probably not be part of the config
253 resolver VariableResolver
254 dataConfigDir string `json:"-"`
255 knownProviders []provider.Provider `json:"-"`
256}
257
258func (c *Config) WorkingDir() string {
259 return c.workingDir
260}
261
262func (c *Config) EnabledProviders() []ProviderConfig {
263 var enabled []ProviderConfig
264 for _, p := range c.Providers.Seq2() {
265 if !p.Disable {
266 enabled = append(enabled, p)
267 }
268 }
269 return enabled
270}
271
272// IsConfigured return true if at least one provider is configured
273func (c *Config) IsConfigured() bool {
274 return len(c.EnabledProviders()) > 0
275}
276
277func (c *Config) GetModel(provider, model string) *provider.Model {
278 if providerConfig, ok := c.Providers.Get(provider); ok {
279 for _, m := range providerConfig.Models {
280 if m.ID == model {
281 return &m
282 }
283 }
284 }
285 return nil
286}
287
288func (c *Config) GetProviderForModel(modelType SelectedModelType) *ProviderConfig {
289 model, ok := c.Models[modelType]
290 if !ok {
291 return nil
292 }
293 if providerConfig, ok := c.Providers.Get(model.Provider); ok {
294 return &providerConfig
295 }
296 return nil
297}
298
299func (c *Config) GetModelByType(modelType SelectedModelType) *provider.Model {
300 model, ok := c.Models[modelType]
301 if !ok {
302 return nil
303 }
304 return c.GetModel(model.Provider, model.Model)
305}
306
307func (c *Config) LargeModel() *provider.Model {
308 model, ok := c.Models[SelectedModelTypeLarge]
309 if !ok {
310 return nil
311 }
312 return c.GetModel(model.Provider, model.Model)
313}
314
315func (c *Config) SmallModel() *provider.Model {
316 model, ok := c.Models[SelectedModelTypeSmall]
317 if !ok {
318 return nil
319 }
320 return c.GetModel(model.Provider, model.Model)
321}
322
323func (c *Config) SetCompactMode(enabled bool) error {
324 if c.Options == nil {
325 c.Options = &Options{}
326 }
327 c.Options.TUI.CompactMode = enabled
328 return c.SetConfigField("options.tui.compact_mode", enabled)
329}
330
331func (c *Config) Resolve(key string) (string, error) {
332 if c.resolver == nil {
333 return "", fmt.Errorf("no variable resolver configured")
334 }
335 return c.resolver.ResolveValue(key)
336}
337
338func (c *Config) UpdatePreferredModel(modelType SelectedModelType, model SelectedModel) error {
339 c.Models[modelType] = model
340 if err := c.SetConfigField(fmt.Sprintf("models.%s", modelType), model); err != nil {
341 return fmt.Errorf("failed to update preferred model: %w", err)
342 }
343 return nil
344}
345
346func (c *Config) SetConfigField(key string, value any) error {
347 // read the data
348 data, err := os.ReadFile(c.dataConfigDir)
349 if err != nil {
350 if os.IsNotExist(err) {
351 data = []byte("{}")
352 } else {
353 return fmt.Errorf("failed to read config file: %w", err)
354 }
355 }
356
357 newValue, err := sjson.Set(string(data), key, value)
358 if err != nil {
359 return fmt.Errorf("failed to set config field %s: %w", key, err)
360 }
361 if err := os.WriteFile(c.dataConfigDir, []byte(newValue), 0o644); err != nil {
362 return fmt.Errorf("failed to write config file: %w", err)
363 }
364 return nil
365}
366
367func (c *Config) SetProviderAPIKey(providerID, apiKey string) error {
368 // First save to the config file
369 err := c.SetConfigField("providers."+providerID+".api_key", apiKey)
370 if err != nil {
371 return fmt.Errorf("failed to save API key to config file: %w", err)
372 }
373
374 providerConfig, exists := c.Providers.Get(providerID)
375 if exists {
376 providerConfig.APIKey = apiKey
377 c.Providers.Set(providerID, providerConfig)
378 return nil
379 }
380
381 var foundProvider *provider.Provider
382 for _, p := range c.knownProviders {
383 if string(p.ID) == providerID {
384 foundProvider = &p
385 break
386 }
387 }
388
389 if foundProvider != nil {
390 // Create new provider config based on known provider
391 providerConfig = ProviderConfig{
392 ID: providerID,
393 Name: foundProvider.Name,
394 BaseURL: foundProvider.APIEndpoint,
395 Type: foundProvider.Type,
396 APIKey: apiKey,
397 Disable: false,
398 ExtraHeaders: make(map[string]string),
399 ExtraParams: make(map[string]string),
400 Models: foundProvider.Models,
401 }
402 } else {
403 return fmt.Errorf("provider with ID %s not found in known providers", providerID)
404 }
405 // Store the updated provider config
406 c.Providers.Set(providerID, providerConfig)
407 return nil
408}
409
410func (c *Config) SetupAgents() {
411 agents := map[string]Agent{
412 "coder": {
413 ID: "coder",
414 Name: "Coder",
415 Description: "An agent that helps with executing coding tasks.",
416 Model: SelectedModelTypeLarge,
417 ContextPaths: c.Options.ContextPaths,
418 // All tools allowed
419 },
420 "task": {
421 ID: "task",
422 Name: "Task",
423 Description: "An agent that helps with searching for context and finding implementation details.",
424 Model: SelectedModelTypeLarge,
425 ContextPaths: c.Options.ContextPaths,
426 AllowedTools: []string{
427 "glob",
428 "grep",
429 "ls",
430 "sourcegraph",
431 "view",
432 },
433 // NO MCPs or LSPs by default
434 AllowedMCP: map[string][]string{},
435 AllowedLSP: []string{},
436 },
437 }
438 c.Agents = agents
439}
440
441func (c *Config) Resolver() VariableResolver {
442 return c.resolver
443}
444
445func (c *ProviderConfig) TestConnection(resolver VariableResolver) error {
446 testURL := ""
447 headers := make(map[string]string)
448 apiKey, _ := resolver.ResolveValue(c.APIKey)
449 switch c.Type {
450 case provider.TypeOpenAI:
451 baseURL, _ := resolver.ResolveValue(c.BaseURL)
452 if baseURL == "" {
453 baseURL = "https://api.openai.com/v1"
454 }
455 testURL = baseURL + "/models"
456 headers["Authorization"] = "Bearer " + apiKey
457 case provider.TypeAnthropic:
458 baseURL, _ := resolver.ResolveValue(c.BaseURL)
459 if baseURL == "" {
460 baseURL = "https://api.anthropic.com/v1"
461 }
462 testURL = baseURL + "/models"
463 headers["x-api-key"] = apiKey
464 headers["anthropic-version"] = "2023-06-01"
465 }
466 ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
467 defer cancel()
468 client := &http.Client{}
469 req, err := http.NewRequestWithContext(ctx, "GET", testURL, nil)
470 if err != nil {
471 return fmt.Errorf("failed to create request for provider %s: %w", c.ID, err)
472 }
473 for k, v := range headers {
474 req.Header.Set(k, v)
475 }
476 for k, v := range c.ExtraHeaders {
477 req.Header.Set(k, v)
478 }
479 b, err := client.Do(req)
480 if err != nil {
481 return fmt.Errorf("failed to create request for provider %s: %w", c.ID, err)
482 }
483 if b.StatusCode != http.StatusOK {
484 return fmt.Errorf("failed to connect to provider %s: %s", c.ID, b.Status)
485 }
486 _ = b.Body.Close()
487 return nil
488}