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index.js
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index.js
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'use strict';
var AWS = require('aws-sdk');
var gutil = require('gulp-util');
var through = require('through2');
var extend = require('xtend');
var DEFAULT_OPTS = {
profile: null,
region: 'us-east-1'
};
var DEFAULT_PARAMS = {
Handler: 'index.handler',
Runtime: 'nodejs4.3'
};
var makeErr = function(message) {
return new gutil.PluginError('gulp-awslambda', message);
};
var updateFunctionCode = function(lambda, name, upload, params, opts) {
delete params.Runtime;
var code = params.Code || { ZipFile: upload.contents };
return lambda.updateFunctionCode(extend({
FunctionName: name
}, code, {
Publish: opts.publish || false
}));
};
var createFunction = function(lambda, upload, params, opts) {
params.Code = params.Code || { ZipFile: upload.contents };
return lambda.createFunction(extend(DEFAULT_PARAMS, {
Publish: opts.publish || false
}, params));
};
var upsertAlias = function(operation, lambda, functionName, functionVersion, alias, aliasDescription) {
var params = {
FunctionName: functionName,
FunctionVersion: functionVersion,
Name: alias,
Description: aliasDescription
};
lambda[operation + 'Alias'](params, function(err) {
if (err) {
gutil.log('Could not ' + operation + ' alias ' + alias + ':' + err);
} else {
gutil.log(operation + 'd alias ' + gutil.colors.magenta(alias) + ' for version ' +
gutil.colors.magenta(functionVersion));
}
});
};
module.exports = function(params, opts) {
opts = extend(DEFAULT_OPTS, opts);
AWS.config.update({ region: opts.region });
var lambda = new AWS.Lambda();
var toUpload;
var functionName = typeof params === 'string' ? params : params.FunctionName;
var updateOrCreateAlias = function(response) {
if (opts.publish && opts.alias) {
lambda.getAlias({
FunctionName: functionName,
Name: opts.alias.name
}, function(err) {
var operation = err ? 'create' : 'update';
upsertAlias(operation, lambda, functionName,
(opts.alias.version || response.data.Version).toString(),
opts.alias.name,
opts.alias.description);
});
}
};
var printVersion = function(response) {
if (opts.publish) {
gutil.log('Publishing Function Version: ' + gutil.colors.magenta(response.data.Version));
}
};
var successfulUpdate = function(response) {
printVersion(response);
updateOrCreateAlias(response);
};
var successfulCreation = function(response) {
printVersion(response);
updateOrCreateAlias(response);
};
var transform = function(file, enc, cb) {
if (file.isNull()) {
return cb();
}
if (file.isStream()) {
return cb(makeErr('Streaming is not supported'));
}
if (!toUpload) {
toUpload = file;
}
cb();
};
var flush = function(cb) {
if (!toUpload && (typeof params === 'string' || !params.Code)) {
return cb(makeErr('No code provided'));
}
if (toUpload && toUpload.path.slice(-4) !== '.zip') {
return cb(makeErr('Provided file is not a ZIP'));
}
if (opts.alias) {
if (!opts.alias.name) {
return cb(makeErr('Alias requires a ' + gutil.colors.red('name') + ' parameter'));
} else if (!(typeof opts.alias.name === 'string')) {
return cb(makeErr('Alias ' + gutil.colors.red('name') + ' must be a string'));
}
}
gutil.log('Uploading Lambda function "' + functionName + '"...');
if (opts.profile !== null) {
AWS.config.credentials = new AWS.SharedIniFileCredentials({ profile: opts.profile });
}
var stream = this;
var done = function(err) {
if (err) {
return cb(makeErr(err.message));
}
gutil.log('Lambda function "' + functionName + '" successfully uploaded');
stream.push(toUpload);
cb();
};
if (typeof params === 'string') {
// Just updating code
updateFunctionCode(lambda, params, toUpload, params, opts)
.on('success', successfulUpdate)
.send(done);
} else {
lambda.getFunctionConfiguration({
FunctionName: params.FunctionName
}, function(err) {
if (err) {
// Creating a function
createFunction(lambda, toUpload, params, opts)
.on('success', successfulCreation)
.send(done);
} else {
// Updating code + config
var runtime = params.Runtime;
updateFunctionCode(lambda, params.FunctionName, toUpload, params, opts)
.on('success', successfulUpdate)
.send(function() {
delete params.Code;
if (runtime) {
params.Runtime = runtime;
}
lambda.updateFunctionConfiguration(params, done);
});
}
});
}
};
return through.obj(transform, flush);
};