loadOnce reads the on-disk cache into memory the first time it is called. Best-effort: a missing or corrupt file leaves the cache empty so callers fall through to a fresh probe.
()
| 54 | // Best-effort: a missing or corrupt file leaves the cache empty so callers |
| 55 | // fall through to a fresh probe. |
| 56 | func (c *detectionCache) loadOnce() { |
| 57 | c.mu.Lock() |
| 58 | defer c.mu.Unlock() |
| 59 | if c.loaded { |
| 60 | return |
| 61 | } |
| 62 | c.loaded = true |
| 63 | raw, err := os.ReadFile(c.path) |
| 64 | if err != nil { |
| 65 | return |
| 66 | } |
| 67 | var file detectionCacheFile |
| 68 | if err := json.Unmarshal(raw, &file); err != nil { |
| 69 | return |
| 70 | } |
| 71 | for name, entry := range file.Tools { |
| 72 | c.entries[name] = entry |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | // get returns the cached entry for name and whether it is still fresh |
| 77 | // (within detectionTTL). A stale or missing entry reports fresh=false so the |