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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| package plugins | ||
|
|
||
| import ( | ||
| "crypto/sha256" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "os/user" | ||
| "path/filepath" | ||
| "sync" | ||
|
|
||
| "github.com/gobuffalo/envy" | ||
| ) | ||
|
|
||
| type cachedPlugin struct { | ||
| Commands Commands `json:"commands"` | ||
| CheckSum string `json:"check_sum"` | ||
| } | ||
|
|
||
| type cachedPlugins map[string]cachedPlugin | ||
|
|
||
| var cachePath = func() string { | ||
| home := "." | ||
| if usr, err := user.Current(); err == nil { | ||
| home = usr.HomeDir | ||
| } | ||
| return filepath.Join(home, ".buffalo", "plugin.cache") | ||
| }() | ||
|
|
||
| var cacheMoot sync.RWMutex | ||
|
|
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| var cacheOn = envy.Get("BUFFALO_PLUGIN_CACHE", "on") | ||
|
|
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| var cache = func() cachedPlugins { | ||
| m := cachedPlugins{} | ||
| if cacheOn != "on" { | ||
| return m | ||
| } | ||
| f, err := os.Open(cachePath) | ||
| if err != nil { | ||
| return m | ||
| } | ||
| defer f.Close() | ||
| if err := json.NewDecoder(f).Decode(&m); err != nil { | ||
| f.Close() | ||
| os.Remove(f.Name()) | ||
| } | ||
| return m | ||
| }() | ||
|
|
||
| func findInCache(path string) (cachedPlugin, bool) { | ||
| cacheMoot.RLock() | ||
| defer cacheMoot.RUnlock() | ||
| cp, ok := cache[path] | ||
| return cp, ok | ||
| } | ||
|
|
||
| func saveCache() error { | ||
| if cacheOn != "on" { | ||
| return nil | ||
| } | ||
| cacheMoot.Lock() | ||
| defer cacheMoot.Unlock() | ||
| os.MkdirAll(filepath.Dir(cachePath), 0744) | ||
| f, err := os.Create(cachePath) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return json.NewEncoder(f).Encode(cache) | ||
| } | ||
|
|
||
| func sum(path string) string { | ||
| f, err := os.Open(path) | ||
| if err != nil { | ||
| return "" | ||
| } | ||
| defer f.Close() | ||
| hash := sha256.New() | ||
| if _, err := io.Copy(hash, f); err != nil { | ||
| return "" | ||
| } | ||
| sum := hash.Sum(nil) | ||
|
|
||
| s := fmt.Sprintf("%x", sum) | ||
| return s | ||
| } | ||
|
|
||
| func addToCache(path string, cp cachedPlugin) { | ||
| if cp.CheckSum == "" { | ||
| cp.CheckSum = sum(path) | ||
| } | ||
| cacheMoot.Lock() | ||
| defer cacheMoot.Unlock() | ||
| cache[path] = cp | ||
| } |
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