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* Fix source code formatting * Init fs watch. Move bats test to dedicated dir * Refactor file watching * Add notification channel to config watcher * Fix path to bats tests in CircleCI config * observer implementation (#5) * config file watching, "requiedHash" support * vendor fsnotify (and update some dependencies) * Upgrade vendored `color` package. Add StdErr outup * Revert changes in a vendor dir * Fix bats test directory paths * problem: duplicate config flags (#6)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| package core | ||
|
|
||
| import ( | ||
| "log" | ||
| "path/filepath" | ||
|
|
||
| "github.com/fsnotify/fsnotify" | ||
| ) | ||
|
|
||
| type configWatchdog struct { | ||
| path string | ||
| watcher *fsnotify.Watcher | ||
| observers []func(*SufficientChainConfig) | ||
| } | ||
|
|
||
| // NewConfigWatchdog creates new file watcher for config | ||
| // directory | ||
| func NewConfigWatchdog() (*configWatchdog, error) { | ||
| path := flaggedExternalChainConfigPath // pull the package-level variable | ||
| watcher, err := fsnotify.NewWatcher() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| // monitor entire directory - we assume, that files can be included only from this directory | ||
| err = watcher.Add(filepath.Dir(path)) | ||
|
|
||
| return &configWatchdog{path, watcher, nil}, err | ||
| } | ||
|
|
||
| // Start config directory watching | ||
| func (cw *configWatchdog) Start() { | ||
| go func() { | ||
| for { | ||
| select { | ||
| case event := <-cw.watcher.Events: | ||
| log.Println("event:", event) | ||
| if event.Op&fsnotify.Write == fsnotify.Write { | ||
| log.Println("modified file:", event.Name) | ||
| newConfig, err := ReadExternalChainConfigFromFile(cw.path) | ||
| if err != nil { | ||
| log.Println("configuration error:", err) | ||
| continue | ||
| } | ||
| for _, observer := range cw.observers { | ||
| observer(newConfig) | ||
| } | ||
| } | ||
| case err := <-cw.watcher.Errors: | ||
| log.Println("error:", err) | ||
| } | ||
| } | ||
| }() | ||
| } | ||
|
|
||
| // Stop config directory watching | ||
| func (cw *configWatchdog) Stop() error { | ||
| return cw.watcher.Close() | ||
| } | ||
|
|
||
| func (cw *configWatchdog) Subscribe(observer func(*SufficientChainConfig)) { | ||
| cw.observers = append(cw.observers, observer) | ||
| } |
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