Conduitry
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docker-windows-watch
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some adjustments

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Conduitry 2018-07-07 08:33:42 -04:00
parent bb316f13fc
commit 585e3810ff
1 changed files with 27 additions and 28 deletions
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55
docker-windows-watch.js
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@ -1,6 +1,8 @@
const EventEmitter = require('events');
const { statSync, watch } = require('fs');
const { stat, watch } = require('fs');
const { request } = require('http');
const { promisify } = require('util');
const statAsync = promisify(stat);
const socketPath = '//./pipe/docker_engine';
const versionPrefix = '/v1.37';
@ -48,35 +50,37 @@ const stream = endpoint => {
return emitter;
};
const watchers = new Map();
const names = new Map();
// handle a watch event
const watchHandler = async (containerId, target, filename) => {
const handleWatch = async (containerId, target, filename) => {
// determine the path inside the container
const dest = filename ? target + '/' + filename.replace(/\\/g, '/') : target;
console.log(`${names.get(containerId)}: ${dest}`);
// create an exec instance for calling chmod
const { Id } = await api('post', `/containers/${containerId}/exec`, {
Cmd: ['chmod', '+', dest],
});
// start the exec instance
await api('post', `/exec/${Id}/start`, { Detach: true });
console.log(`${names.get(containerId)}: ${dest}`);
};
const watchers = new Map();
const names = new Map();
// attach a watcher for the given bind mount
const attachWatcher = (containerId, source, target) => {
const attachWatcher = async (containerId, source, target) => {
// debounce the fs.watch events and handle them
const timeouts = new Map();
const isDir = (await statAsync(source)).isDirectory();
watchers.get(containerId).push(
watch(source, { recursive: true }, async (eventType, filename) => {
clearTimeout(timeouts.get(filename));
timeouts.set(
filename,
setTimeout(handleWatch, 10, containerId, target, isDir && filename),
);
}),
);
console.log(`${names.get(containerId)}: [watching] ${source} => ${target}`);
const isDir = statSync(source).isDirectory();
return watch(source, { recursive: true }, async (eventType, filename) => {
clearTimeout(timeouts.get(filename));
timeouts.set(
filename,
setTimeout(watchHandler, 10, containerId, target, isDir && filename),
);
});
};
// attach all watchers for a given container
@ -84,28 +88,23 @@ const attachWatchers = async container => {
// inspect the container
const info = await api('get', `/containers/${container}/json`);
// attach a watcher for each bind mount
const arr = [];
watchers.set(info.Id, arr);
names.set(info.Id, info.Name ? info.Name.slice(1) : info.Id);
watchers.set(info.Id, []);
names.set(info.Id, info.Name.slice(1));
for (const { Type, Source, Destination } of info.Mounts) {
if (Type === 'bind' && Source.startsWith('/host_mnt/')) {
// determine the host path of the mount
arr.push(
attachWatcher(
info.Id,
Source[10] + ':' + Source.slice(11).replace(/\//g, '\\'),
Destination,
),
);
attachWatcher(info.Id, Source.slice(10).replace('/', ':/'), Destination);
}
}
};
// detach all watchers for a given container
const detachWatchers = containerId => {
console.log(`${names.get(containerId)}: [closing]`);
for (const watcher of watchers.get(containerId)) {
watcher.close();
if (watchers.get(containerId).length) {
for (const watcher of watchers.get(containerId)) {
watcher.close();
}
console.log(`${names.get(containerId)}: [closing]`);
}
watchers.delete(containerId);
names.delete(containerId);