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import { join } from "node:path";
import { watch } from "chokidar";
import type { DispatchConfig } from "../types/index.js";
import { getGlobalConfigPath, loadConfig } from "./loader.js";
/**
* Watch BOTH the HOME-directory global `dispatch.toml` and the project/working-
* directory `dispatch.toml`. Either file changing triggers a reload that
* re-merges global + local (via {@link loadConfig}), so hot-reload works for
* global defaults and per-project overrides alike.
*
* When the global and local paths coincide (e.g. the working directory IS
* `~/.config/dispatch`, or `DISPATCH_GLOBAL_CONFIG` points at the local file)
* the duplicate is collapsed so chokidar only watches it once.
*/
export function createConfigWatcher(
dir: string,
onChange: (config: DispatchConfig) => void,
): { close(): void } {
const localPath = join(dir, "dispatch.toml");
const globalPath = getGlobalConfigPath();
const paths = globalPath === localPath ? [localPath] : [globalPath, localPath];
let debounceTimer: ReturnType<typeof setTimeout> | null = null;
const watcher = watch(paths, {
ignoreInitial: true,
persistent: false,
});
const handleChange = () => {
if (debounceTimer !== null) {
clearTimeout(debounceTimer);
}
debounceTimer = setTimeout(() => {
debounceTimer = null;
console.log(`dispatch: reloading config (global + ${localPath})`);
try {
const config = loadConfig(dir);
onChange(config);
} catch (err) {
console.warn(
`dispatch: retaining last known config due to parse error: ${err instanceof Error ? err.message : String(err)}`,
);
}
}, 300);
};
watcher.on("change", handleChange);
watcher.on("add", handleChange);
watcher.on("unlink", handleChange);
watcher.on("error", (err) => {
console.warn(
`dispatch: config watcher error: ${err instanceof Error ? err.message : String(err)}`,
);
});
return {
close() {
if (debounceTimer !== null) {
clearTimeout(debounceTimer);
debounceTimer = null;
}
watcher.close().catch((err) => {
console.warn(
`dispatch: error closing config watcher: ${err instanceof Error ? err.message : String(err)}`,
);
});
},
};
}
|
