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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| package app | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
|
|
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| "github.com/cdmistman/watchman" | ||
| "github.com/cdmistman/watchman/protocol" | ||
| "github.com/cdmistman/watchman/protocol/query" | ||
| "github.com/rs/zerolog/log" | ||
| ) | ||
|
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| type watchmanState int | ||
|
|
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| const ( | ||
| uninit watchmanState = iota | ||
| initing | ||
| errored | ||
| ready | ||
| ) | ||
|
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| type Watchman struct { | ||
| subscriptions []Subscription | ||
| } | ||
|
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| type Subscription struct { | ||
| updates chan []string | ||
| glob string | ||
| } | ||
|
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| func (w *Watchman) MaybeStart() error { | ||
| // TODO: proper error handling | ||
| if len(w.subscriptions) == 0 { | ||
| return nil | ||
| } | ||
|
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| globs := []string{} | ||
| for _, sub := range w.subscriptions { | ||
| globs = append(globs, sub.glob) | ||
| } | ||
|
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| q := query.Query{ | ||
| Generators: query.Generators{query.GGlob: globs}, | ||
| Fields: query.Fields{query.FName}, | ||
| } | ||
|
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| client, err := watchman.Connect() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| if !client.HasCapability("glob_generator") { | ||
| return fmt.Errorf("watchman does not have the glob_generator capability") | ||
| } | ||
|
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| cwd, err := os.Getwd() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| watch, err := client.AddWatch(cwd) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| if watch.RelativePath() != "" { | ||
| if !client.HasCapability("relative_root") { | ||
| return fmt.Errorf("watchman does not have the relative_root capability but gave a relative root") | ||
| } | ||
|
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| q.RelativeRoot = watch.RelativePath() | ||
| } | ||
|
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| if _, err = watch.Subscribe("process-compose", &q); err != nil { | ||
| return err | ||
| } | ||
|
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| go loop(client, w.subscriptions, watch.Root(), watch.RelativePath()) | ||
| return nil | ||
| } | ||
|
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| // assumes that all subscriptions have already been created | ||
| func loop(client *watchman.Client, subs []Subscription, root, rel string) { | ||
| for { | ||
| rawNotif, ok := <-client.Notifications() | ||
| if !ok { | ||
| log.Warn().Msg("watchman client shut down, exiting watch loop") | ||
| return | ||
| } | ||
|
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| notif, ok := rawNotif.(*protocol.Subscription) | ||
| if !ok { | ||
| log.Debug().Msg("got a non-subscription notification, ignoring") | ||
| } | ||
|
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| if notif.IsFreshInstance() { | ||
| log.Debug().Msg("fresh instance notification, ignoring") | ||
| } | ||
|
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| files := []string{} | ||
| for _, rawFile := range notif.Files() { | ||
| // if the query fields change, this will need to be a map[string]any | ||
| file := rawFile.(string) | ||
| files = append(files, file) | ||
| } | ||
|
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| for _, sub := range subs { | ||
| sub.updates <- files | ||
| } | ||
| } | ||
| } | ||
|
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| func (w *Watchman) Subscribe(glob string) <-chan []string { | ||
| ch := make(chan []string) | ||
| w.subscriptions = append(w.subscriptions, Subscription{ | ||
| updates: ch, | ||
| glob: glob, | ||
| }) | ||
|
|
||
| return ch | ||
| } |
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