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| const config = require('../config'),
Release = require('../data').Release,
mime = require('mime-types'),
gunzip = require('gunzip-maybe'),
tarStream = require('tar-stream'),
s3 = require('../s3-helpers');
function _updateProgress(reporter, message) {
Iif (reporter) {
reporter.emit('update', {message});
}
}
function _doRelease(build, target, algorithm, reporter) {
return new Promise((resolve, reject) => {
let bucketMap = {},
extract = tarStream.extract(),
dataStream = s3.getInstance().getObject({
Bucket: config.local.rootBucket.name,
Key: build.path
}).createReadStream();
dataStream.on('error', (error) => {
reject('Download failed: ' + error);
});
s3.listAllObjects({
Bucket: target
}).then((entries) => {
entries.forEach((e) => {
e.processed = false;
bucketMap[e.Key] = e;
});
extract.on('entry', function(header, stream, next) {
stream.on('end', function() {
next();
});
if (header.type === 'file') {
let entry = bucketMap[header.name];
if (entry) {
entry.processed = true;
Iif (entry.Size === header.size && entry.LastModified === header.mtime) {
_updateProgress(reporter, 'Skipping ' + header.name);
stream.resume();
return;
} else {
_updateProgress(reporter, 'Overwriting ' + header.name);
}
} else {
_updateProgress(reporter, 'Uploading ' + header.name);
}
s3.getInstance().upload(
{
Bucket: target,
Key: header.name,
Body: stream,
ACL: 'public-read',
CacheControl: 'max-age=600',
ContentType: mime.lookup(header.name) || 'application/octet-stream'
},
(err, data) => {
Iif (err) {
reject('Failed deploying ' + header.name + ': ' + err);
}
}
);
} else {
stream.resume();
}
});
extract.on('finish', function() {
/* Prepare a release object */
let release = new Release(build);
release.updateReleaseDate();
/* Delete files from bucket that weren't in the archive */
if (algorithm === 'sync') {
let toDelete = entries.filter(e => !e.processed);
toDelete.forEach(e => _updateProgress(reporter, 'Deleting ' + e.Key));
s3.deleteEntries(target, toDelete).then(() => {
resolve(release);
}).catch(reject);
} else {
resolve(release);
}
});
/* Decompress and parse the stream */
dataStream.pipe(gunzip()).pipe(extract);
});
});
}
function _uploadKartFile(release, target) {
return new Promise((resolve, reject) => {
s3.getInstance().upload(
{
Bucket: target,
Key: 'kart.json',
Body: release.toJSON()
},
(err, data) => {
Iif (err) {
return reject('Failed uploading the kart file:' + err);
}
resolve();
}
);
});
}
function _downloadKartFile(project, channel) {
return new Promise((resolve, reject) => {
s3.getInstance().getObject(
{
Bucket: config.remote.projects[project].channels[channel].deploy.bucket,
Key: 'kart.json'
},
(err, data) => {
if (err) {
if (err.code === 'NoSuchKey') {
return resolve(null);
}
return reject('Failed downloading kart.json: ' + err);
}
resolve(new Release(JSON.parse(data.Body.toString())));
}
);
});
}
/**
* Release a build.
*
* Uploading algorithms:
* * clear: Clears the target bucket before writing the build into it.
* * overwrite: Writes all the files into the bucked without clearing it out first.
* * sync: Uses the `aws sync` command to minimise bandwith usage.
*
* @param {Object} build The build object to be released.
* @param {Object} opts Options.
* @param {String} opts.bucket Name of the bucket to deploy to.
* @param {String} opts.algorithm Either 'clear', 'overwrite' or 'sync'.
* @param {String} opts.reporter An optional event listener to report events.
*/
function release(build, opts) {
let bucket = opts.bucket,
algorithm = opts.algorithm || 'clear',
releaseObject;
return build.fetchMetadata()
.then(() => {
return algorithm === 'clear' ? s3.clearBucket(bucket) : Promise.resolve();
}).then(() => {
return _doRelease(build, bucket, algorithm, opts.reporter);
}).then((r) => {
releaseObject = r;
return _uploadKartFile(releaseObject, bucket);
}).then(() => {
return Promise.resolve(releaseObject);
});
}
function status(project, channel) {
return _downloadKartFile(project, channel);
}
module.exports = {
release,
status
} |