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make_shim_template.js
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make_shim_template.js
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var first = require("lodash/first");
var template = require("lodash/template");
var slimPluginsPartial = `
// delegate loading non plain JS modules to plugins
var pluginModuleId = steal.plugins[steal.bundles[moduleId]];
if (pluginModuleId) {
return stealRequire(pluginModuleId)(moduleId, steal);
}
`;
var renderProgressivePartial = function(options) {
return options.progressive ?
require("./progressive_loader_partial")[options.target] : "";
};
var importSlimExtensionsPartial = `
(steal.extensions || []).forEach(function(id) {
stealRequire(id)(stealRequire);
});
`;
var importSharedBundlesPartial = function(bundles) {
// get a list of the first node ids inside the shared bundles
// stealRequire.dynamic expects node ids and not bundle ids
var ids = bundles.map(function(bundle) {
return first(bundle.nodes).load.uniqueId;
});
return `${JSON.stringify(ids)}.map(stealRequire.dynamic)`;
};
var resolveHook = {
baseResolve: `
// hook into resolve to load stuff before the graph is executed
stealRequire.resolve = function(id) {
return Promise.resolve(id);
};
`,
resolveIds: `
(steal.identifiersToResolve || []).map(function(id) {
return stealRequire.resolve(id, steal).then(function(resolved) {
resolvedIdentifiers[id] = resolved;
});
})
`,
stealRequireExtension: `
if (moduleId === "@empty") {
return {};
}
if (resolvedIdentifiers[moduleId]) {
return stealRequire(resolvedIdentifiers[moduleId]);
}
`
};
var renderMainImportPartial = function(options) {
var result;
var sharedBundles = options.sharedBundles || [];
var prefix = options.target === "node" ? "module.exports = " : "";
var importMainPartial = options.splitLoader ?
prefix + "stealRequire.dynamic(<%= mainModuleId %>);" :
prefix + "stealRequire(<%= mainModuleId %>);";
if (options.resolve && sharedBundles.length) {
result = `
var beforeMain = [];
beforeMain.concat(${resolveHook.resolveIds});
beforeMain.concat(${importSharedBundlesPartial(sharedBundles)});
Promise.all(beforeMain).then(function() {
${importMainPartial}
});
`;
} else if (options.resolve) {
result = `
Promise.all(${resolveHook.resolveIds}).then(function() {
${importMainPartial}
});
`;
} else if (sharedBundles.length) {
result = `
Promise.all(${importSharedBundlesPartial(sharedBundles)})
.then(function() {
${importMainPartial}
});
`;
} else {
result = importMainPartial;
}
return result;
};
module.exports = function(options) {
return template(`
(function(modules) {
var modulesMap = {};
var loadedModules = {};
${options.resolve ? "var resolvedIdentifiers = {};" : ""}
function addModules(mods) {
mods.forEach(function(m) { modulesMap[m[0]] = m[1]; });
}
addModules(modules);
function stealRequire(moduleId) {
if (loadedModules[moduleId]) {
return loadedModules[moduleId].exports;
}
${options.resolve ? resolveHook.stealRequireExtension : ""}
${options.plugins ? slimPluginsPartial : ""}
var stealModule = (loadedModules[moduleId] = {
exports: {}
});
modulesMap[moduleId].call(
stealModule.exports,
stealRequire,
stealModule.exports,
stealModule
);
return stealModule.exports;
}
${renderProgressivePartial(options)}
${options.resolve ? resolveHook.baseResolve : ""}
${options.extensions ? importSlimExtensionsPartial : ""}
${renderMainImportPartial(options)}
})([
<%= args %>
]);
`);
};