Conduitry
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docker-windows-watch
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tidy

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Conduitry 2018-07-06 23:31:00 -04:00
parent 41703af328
commit bb316f13fc
1 changed files with 13 additions and 26 deletions
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39
docker-windows-watch.js
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@ -49,10 +49,10 @@ const stream = endpoint => {
};
// handle a watch event
const watchHandler = async (containerId, containerName, target, filename) => {
const watchHandler = async (containerId, target, filename) => {
// determine the path inside the container
const dest = filename ? target + '/' + filename.replace(/\\/g, '/') : target;
console.log(`${containerName}: ${dest}`);
console.log(`${names.get(containerId)}: ${dest}`);
// create an exec instance for calling chmod
const { Id } = await api('post', `/containers/${containerId}/exec`, {
Cmd: ['chmod', '+', dest],
@ -62,25 +62,19 @@ const watchHandler = async (containerId, containerName, target, filename) => {
};
const watchers = new Map();
const names = new Map();
// attach a watcher for the given bind mount
const attachWatcher = (containerId, containerName, source, target) => {
const attachWatcher = (containerId, source, target) => {
// debounce the fs.watch events and handle them
const timeouts = new Map();
console.log(`${containerName}: [watching] ${source} => ${target}`);
console.log(`${names.get(containerId)}: [watching] ${source} => ${target}`);
const isDir = statSync(source).isDirectory();
return watch(source, { recursive: true }, async (eventType, filename) => {
clearTimeout(timeouts.get(filename));
timeouts.set(
filename,
setTimeout(
watchHandler,
10,
containerId,
containerName,
target,
isDir && filename,
),
setTimeout(watchHandler, 10, containerId, target, isDir && filename),
);
});
};
@ -92,13 +86,13 @@ const attachWatchers = async container => {
// attach a watcher for each bind mount
const arr = [];
watchers.set(info.Id, arr);
names.set(info.Id, info.Name ? info.Name.slice(1) : info.Id);
for (const { Type, Source, Destination } of info.Mounts) {
if (Type === 'bind' && Source.startsWith('/host_mnt/')) {
// determine the host path of the mount
arr.push(
attachWatcher(
info.Id,
info.Name ? info.Name.slice(1) : info.Id,
Source[10] + ':' + Source.slice(11).replace(/\//g, '\\'),
Destination,
),
@ -108,12 +102,13 @@ const attachWatchers = async container => {
};
// detach all watchers for a given container
const detachWatchers = (containerId, containerName) => {
console.log(`${containerName}: [closing]`);
const detachWatchers = containerId => {
console.log(`${names.get(containerId)}: [closing]`);
for (const watcher of watchers.get(containerId)) {
watcher.close();
}
watchers.delete(containerId);
names.delete(containerId);
};
(async () => {
@ -126,17 +121,9 @@ const detachWatchers = (containerId, containerName) => {
// attach watchers to all containers and monitor starting and stopping of containers
stream(
'/events?filters=%7B%22type%22%3A%5B%22container%22%5D%2C%22event%22%3A%5B%22start%22%2C%22die%22%5D%7D',
).on('', event => {
if (event.Action === 'start') {
attachWatchers(event.id);
} else if (event.Action === 'die') {
const containerName =
event.Actor && event.Actor.Attributes && event.Actor.Attributes.name
? event.Actor.Attributes.name
: event.id;
detachWatchers(event.id, containerName);
}
});
).on('', ({ Action, id }) =>
(Action === 'start' ? attachWatchers : detachWatchers)(id),
);
for (const container of await api('get', '/containers/json')) {
attachWatchers(container.Id);
}