mirror of https://github.com/webpack/webpack.git
63 lines
1.6 KiB
JavaScript
63 lines
1.6 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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/*globals __resourceQuery */
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if (module.hot) {
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var log = require("./log");
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var checkForUpdate = function checkForUpdate(fromUpdate) {
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module.hot
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.check()
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.then(function(updatedModules) {
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if (!updatedModules) {
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if (fromUpdate) log("info", "[HMR] Update applied.");
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else log("warning", "[HMR] Cannot find update.");
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return;
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}
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return module.hot
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.apply({
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ignoreUnaccepted: true,
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onUnaccepted: function(data) {
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log(
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"warning",
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"Ignored an update to unaccepted module " +
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data.chain.join(" -> ")
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);
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}
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})
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.then(function(renewedModules) {
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require("./log-apply-result")(updatedModules, renewedModules);
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checkForUpdate(true);
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return null;
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});
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})
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.catch(function(err) {
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var status = module.hot.status();
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if (["abort", "fail"].indexOf(status) >= 0) {
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log("warning", "[HMR] Cannot apply update.");
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log("warning", "[HMR] " + log.formatError(err));
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log("warning", "[HMR] You need to restart the application!");
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} else {
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log("warning", "[HMR] Update failed: " + (err.stack || err.message));
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}
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});
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};
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process.on(__resourceQuery.substr(1) || "SIGUSR2", function() {
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if (module.hot.status() !== "idle") {
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log(
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"warning",
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"[HMR] Got signal but currently in " + module.hot.status() + " state."
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);
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log("warning", "[HMR] Need to be in idle state to start hot update.");
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return;
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}
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checkForUpdate();
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});
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} else {
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throw new Error("[HMR] Hot Module Replacement is disabled.");
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}
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