1package config
2
3import (
4 "context"
5 "fmt"
6 "log/slog"
7 "net/http"
8 "os"
9 "slices"
10 "strings"
11 "time"
12
13 "github.com/charmbracelet/catwalk/pkg/catwalk"
14 "github.com/charmbracelet/crush/internal/csync"
15 "github.com/charmbracelet/crush/internal/env"
16 "github.com/tidwall/sjson"
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 catwalk.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 []catwalk.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 Permissions struct {
125 AllowedTools []string `json:"allowed_tools,omitempty"` // Tools that don't require permission prompts
126 SkipRequests bool `json:"-"` // Automatically accept all permissions (YOLO mode)
127}
128
129type Options struct {
130 ContextPaths []string `json:"context_paths,omitempty"`
131 TUI *TUIOptions `json:"tui,omitempty"`
132 Debug bool `json:"debug,omitempty"`
133 DebugLSP bool `json:"debug_lsp,omitempty"`
134 DisableAutoSummarize bool `json:"disable_auto_summarize,omitempty"`
135 DataDirectory string `json:"data_directory,omitempty"` // Relative to the cwd
136}
137
138type MCPs map[string]MCPConfig
139
140type MCP struct {
141 Name string `json:"name"`
142 MCP MCPConfig `json:"mcp"`
143}
144
145func (m MCPs) Sorted() []MCP {
146 sorted := make([]MCP, 0, len(m))
147 for k, v := range m {
148 sorted = append(sorted, MCP{
149 Name: k,
150 MCP: v,
151 })
152 }
153 slices.SortFunc(sorted, func(a, b MCP) int {
154 return strings.Compare(a.Name, b.Name)
155 })
156 return sorted
157}
158
159type LSPs map[string]LSPConfig
160
161type LSP struct {
162 Name string `json:"name"`
163 LSP LSPConfig `json:"lsp"`
164}
165
166func (l LSPs) Sorted() []LSP {
167 sorted := make([]LSP, 0, len(l))
168 for k, v := range l {
169 sorted = append(sorted, LSP{
170 Name: k,
171 LSP: v,
172 })
173 }
174 slices.SortFunc(sorted, func(a, b LSP) int {
175 return strings.Compare(a.Name, b.Name)
176 })
177 return sorted
178}
179
180func (m MCPConfig) ResolvedEnv() []string {
181 resolver := NewShellVariableResolver(env.New())
182 for e, v := range m.Env {
183 var err error
184 m.Env[e], err = resolver.ResolveValue(v)
185 if err != nil {
186 slog.Error("error resolving environment variable", "error", err, "variable", e, "value", v)
187 continue
188 }
189 }
190
191 env := make([]string, 0, len(m.Env))
192 for k, v := range m.Env {
193 env = append(env, fmt.Sprintf("%s=%s", k, v))
194 }
195 return env
196}
197
198func (m MCPConfig) ResolvedHeaders() map[string]string {
199 resolver := NewShellVariableResolver(env.New())
200 for e, v := range m.Headers {
201 var err error
202 m.Headers[e], err = resolver.ResolveValue(v)
203 if err != nil {
204 slog.Error("error resolving header variable", "error", err, "variable", e, "value", v)
205 continue
206 }
207 }
208 return m.Headers
209}
210
211type Agent struct {
212 ID string `json:"id,omitempty"`
213 Name string `json:"name,omitempty"`
214 Description string `json:"description,omitempty"`
215 // This is the id of the system prompt used by the agent
216 Disabled bool `json:"disabled,omitempty"`
217
218 Model SelectedModelType `json:"model"`
219
220 // The available tools for the agent
221 // if this is nil, all tools are available
222 AllowedTools []string `json:"allowed_tools,omitempty"`
223
224 // this tells us which MCPs are available for this agent
225 // if this is empty all mcps are available
226 // the string array is the list of tools from the AllowedMCP the agent has available
227 // if the string array is nil, all tools from the AllowedMCP are available
228 AllowedMCP map[string][]string `json:"allowed_mcp,omitempty"`
229
230 // The list of LSPs that this agent can use
231 // if this is nil, all LSPs are available
232 AllowedLSP []string `json:"allowed_lsp,omitempty"`
233
234 // Overrides the context paths for this agent
235 ContextPaths []string `json:"context_paths,omitempty"`
236}
237
238// Config holds the configuration for crush.
239type Config struct {
240 // We currently only support large/small as values here.
241 Models map[SelectedModelType]SelectedModel `json:"models,omitempty"`
242
243 // The providers that are configured
244 Providers *csync.Map[string, ProviderConfig] `json:"providers,omitempty"`
245
246 MCP MCPs `json:"mcp,omitempty"`
247
248 LSP LSPs `json:"lsp,omitempty"`
249
250 Options *Options `json:"options,omitempty"`
251
252 Permissions *Permissions `json:"permissions,omitempty"`
253
254 // Internal
255 workingDir string `json:"-"`
256 // TODO: most likely remove this concept when I come back to it
257 Agents map[string]Agent `json:"-"`
258 // TODO: find a better way to do this this should probably not be part of the config
259 resolver VariableResolver
260 dataConfigDir string `json:"-"`
261 knownProviders []catwalk.Provider `json:"-"`
262}
263
264func (c *Config) WorkingDir() string {
265 return c.workingDir
266}
267
268func (c *Config) EnabledProviders() []ProviderConfig {
269 var enabled []ProviderConfig
270 for _, p := range c.Providers.Seq2() {
271 if !p.Disable {
272 enabled = append(enabled, p)
273 }
274 }
275 return enabled
276}
277
278// IsConfigured return true if at least one provider is configured
279func (c *Config) IsConfigured() bool {
280 return len(c.EnabledProviders()) > 0
281}
282
283func (c *Config) GetModel(provider, model string) *catwalk.Model {
284 if providerConfig, ok := c.Providers.Get(provider); ok {
285 for _, m := range providerConfig.Models {
286 if m.ID == model {
287 return &m
288 }
289 }
290 }
291 return nil
292}
293
294func (c *Config) GetProviderForModel(modelType SelectedModelType) *ProviderConfig {
295 model, ok := c.Models[modelType]
296 if !ok {
297 return nil
298 }
299 if providerConfig, ok := c.Providers.Get(model.Provider); ok {
300 return &providerConfig
301 }
302 return nil
303}
304
305func (c *Config) GetModelByType(modelType SelectedModelType) *catwalk.Model {
306 model, ok := c.Models[modelType]
307 if !ok {
308 return nil
309 }
310 return c.GetModel(model.Provider, model.Model)
311}
312
313func (c *Config) LargeModel() *catwalk.Model {
314 model, ok := c.Models[SelectedModelTypeLarge]
315 if !ok {
316 return nil
317 }
318 return c.GetModel(model.Provider, model.Model)
319}
320
321func (c *Config) SmallModel() *catwalk.Model {
322 model, ok := c.Models[SelectedModelTypeSmall]
323 if !ok {
324 return nil
325 }
326 return c.GetModel(model.Provider, model.Model)
327}
328
329func (c *Config) SetCompactMode(enabled bool) error {
330 if c.Options == nil {
331 c.Options = &Options{}
332 }
333 c.Options.TUI.CompactMode = enabled
334 return c.SetConfigField("options.tui.compact_mode", enabled)
335}
336
337func (c *Config) Resolve(key string) (string, error) {
338 if c.resolver == nil {
339 return "", fmt.Errorf("no variable resolver configured")
340 }
341 return c.resolver.ResolveValue(key)
342}
343
344func (c *Config) UpdatePreferredModel(modelType SelectedModelType, model SelectedModel) error {
345 c.Models[modelType] = model
346 if err := c.SetConfigField(fmt.Sprintf("models.%s", modelType), model); err != nil {
347 return fmt.Errorf("failed to update preferred model: %w", err)
348 }
349 return nil
350}
351
352func (c *Config) SetConfigField(key string, value any) error {
353 // read the data
354 data, err := os.ReadFile(c.dataConfigDir)
355 if err != nil {
356 if os.IsNotExist(err) {
357 data = []byte("{}")
358 } else {
359 return fmt.Errorf("failed to read config file: %w", err)
360 }
361 }
362
363 newValue, err := sjson.Set(string(data), key, value)
364 if err != nil {
365 return fmt.Errorf("failed to set config field %s: %w", key, err)
366 }
367 if err := os.WriteFile(c.dataConfigDir, []byte(newValue), 0o644); err != nil {
368 return fmt.Errorf("failed to write config file: %w", err)
369 }
370 return nil
371}
372
373func (c *Config) SetProviderAPIKey(providerID, apiKey string) error {
374 // First save to the config file
375 err := c.SetConfigField("providers."+providerID+".api_key", apiKey)
376 if err != nil {
377 return fmt.Errorf("failed to save API key to config file: %w", err)
378 }
379
380 providerConfig, exists := c.Providers.Get(providerID)
381 if exists {
382 providerConfig.APIKey = apiKey
383 c.Providers.Set(providerID, providerConfig)
384 return nil
385 }
386
387 var foundProvider *catwalk.Provider
388 for _, p := range c.knownProviders {
389 if string(p.ID) == providerID {
390 foundProvider = &p
391 break
392 }
393 }
394
395 if foundProvider != nil {
396 // Create new provider config based on known provider
397 providerConfig = ProviderConfig{
398 ID: providerID,
399 Name: foundProvider.Name,
400 BaseURL: foundProvider.APIEndpoint,
401 Type: foundProvider.Type,
402 APIKey: apiKey,
403 Disable: false,
404 ExtraHeaders: make(map[string]string),
405 ExtraParams: make(map[string]string),
406 Models: foundProvider.Models,
407 }
408 } else {
409 return fmt.Errorf("provider with ID %s not found in known providers", providerID)
410 }
411 // Store the updated provider config
412 c.Providers.Set(providerID, providerConfig)
413 return nil
414}
415
416func (c *Config) SetupAgents() {
417 agents := map[string]Agent{
418 "coder": {
419 ID: "coder",
420 Name: "Coder",
421 Description: "An agent that helps with executing coding tasks.",
422 Model: SelectedModelTypeLarge,
423 ContextPaths: c.Options.ContextPaths,
424 // All tools allowed
425 },
426 "task": {
427 ID: "task",
428 Name: "Task",
429 Description: "An agent that helps with searching for context and finding implementation details.",
430 Model: SelectedModelTypeLarge,
431 ContextPaths: c.Options.ContextPaths,
432 AllowedTools: []string{
433 "glob",
434 "grep",
435 "ls",
436 "sourcegraph",
437 "view",
438 },
439 // NO MCPs or LSPs by default
440 AllowedMCP: map[string][]string{},
441 AllowedLSP: []string{},
442 },
443 }
444 c.Agents = agents
445}
446
447func (c *Config) Resolver() VariableResolver {
448 return c.resolver
449}
450
451func (c *ProviderConfig) TestConnection(resolver VariableResolver) error {
452 testURL := ""
453 headers := make(map[string]string)
454 apiKey, _ := resolver.ResolveValue(c.APIKey)
455 switch c.Type {
456 case catwalk.TypeOpenAI:
457 baseURL, _ := resolver.ResolveValue(c.BaseURL)
458 if baseURL == "" {
459 baseURL = "https://api.openai.com/v1"
460 }
461 testURL = baseURL + "/models"
462 headers["Authorization"] = "Bearer " + apiKey
463 case catwalk.TypeAnthropic:
464 baseURL, _ := resolver.ResolveValue(c.BaseURL)
465 if baseURL == "" {
466 baseURL = "https://api.anthropic.com/v1"
467 }
468 testURL = baseURL + "/models"
469 headers["x-api-key"] = apiKey
470 headers["anthropic-version"] = "2023-06-01"
471 }
472 ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
473 defer cancel()
474 client := &http.Client{}
475 req, err := http.NewRequestWithContext(ctx, "GET", testURL, nil)
476 if err != nil {
477 return fmt.Errorf("failed to create request for provider %s: %w", c.ID, err)
478 }
479 for k, v := range headers {
480 req.Header.Set(k, v)
481 }
482 for k, v := range c.ExtraHeaders {
483 req.Header.Set(k, v)
484 }
485 b, err := client.Do(req)
486 if err != nil {
487 return fmt.Errorf("failed to create request for provider %s: %w", c.ID, err)
488 }
489 if b.StatusCode != http.StatusOK {
490 return fmt.Errorf("failed to connect to provider %s: %s", c.ID, b.Status)
491 }
492 _ = b.Body.Close()
493 return nil
494}