/
slim.js
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/
slim.js
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/*jshint funcscope:true*/
var pump = require("pump");
var arrify = require("../arrify");
var assign = require("lodash/assign");
var difference = require("lodash/difference");
var makeDeferred = require("../make-deferred");
var isUndefined = require("lodash/isUndefined");
var assignDefaultOptions = require("../assign_default_options");
// streams
var buildType = require("../stream/build_type");
var bundle = require("../stream/bundle");
var minify = require("../stream/minify");
var slimBundles = require("../stream/slim");
var transpile = require("../stream/transpile");
var concat = require("../bundle/concat_stream");
var addModuleIds = require("../stream/add_module_ids");
var addBundleIds = require("../stream/add_bundle_ids");
var filterGraph = require("../stream/filter_slim_graph");
var addPluginNames = require("../stream/add_plugin_names");
var addAtStealShim = require("../stream/add_steal_shim");
var addAtLoaderShim = require("../stream/add_loader_shim");
var loadNodeBuilder = require("../stream/load_node_builder");
var convertSlimConfig = require("../stream/convert_slim_config");
var adjustBundlesPath = require("../stream/adjust_bundles_path");
var write = require("../bundle/write_bundles").createWriteStream;
var writeBundlesManifest = require("../stream/write_bundle_manifest");
var graph = require("../graph/make_graph_with_bundles").createBundleGraphStream;
module.exports = function(cfg, opts) {
var config = cfg !== undefined ? cfg : {};
var options = opts !== undefined ? opts : {};
var slimDfd = makeDeferred();
var supportedTargets = ["web", "node", "worker"];
// minification is on by default
assign(options, {
minify: isUndefined(options.minify) ? true : options.minify
});
try {
options = assignDefaultOptions(config, options);
} catch (err) {
return Promise.reject(err);
}
// fail early if an unknown target is passed in
var targets = arrify(options.target);
if (difference(targets, supportedTargets).length) {
var unknown = difference(targets, supportedTargets);
return Promise.reject(
new Error(
`Cannot create slim build, target(s) ${unknown.join(",")} not supported`
)
);
}
var initialStream = pump(
graph(config, options),
buildType("optimize"),
filterGraph(),
addAtStealShim(),
addAtLoaderShim(),
addModuleIds(),
convertSlimConfig(),
loadNodeBuilder(),
transpile({
outputFormat: "slim",
keepInGraph: ["@steal", "@loader"]
}),
bundle(),
addPluginNames(),
addBundleIds(),
function(err) {
if (err) slimDfd.reject(err);
}
);
var promises = (targets.length ? targets : [""]).map(function(target) {
var dfd = makeDeferred();
var final = pump(
initialStream,
adjustBundlesPath({ target: target }), // the "" target is relevant for this transform
slimBundles({ target: target || "web" }), // set default target so there is no need to handle ""
concat(),
minify(),
write(),
writeBundlesManifest(),
function(err) {
if (err) dfd.reject(err);
}
);
final.on("data", function (builtResult) {
// run external steal-tool plugins after the build
if (options) {
var p = Promise.resolve(builtResult);
if (options.bundleAssets) {
var bundleAssets = require("steal-bundler");
p = p.then(function (builtResult) {
return bundleAssets(builtResult, options.bundleAssets);
});
}
}
p.then(function (builtResult) {
dfd.resolve(builtResult);
}).catch(function (error) {
dfd.reject(error);
});
});
return dfd.promise;
});
Promise.all(promises).then(
// If no `target` is provided resolves `buildResult`; otherwise
// resolves an object where the key is the target name and its value
// the `buildResult` object.
function(results) {
var value;
if (targets.length) {
value = {};
results.forEach(function(result, index) {
value[targets[index]] = result;
});
} else {
value = results[0];
}
slimDfd.resolve(value);
},
slimDfd.reject
);
return slimDfd.promise;
};