signal.js
631422e9a504validity_dates

signal.js
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			/*
			MIT License http://www.opensource.org/licenses/mit-license.php
			Author Tobias Koppers @sokra
			*/
			/globals __resourceQuery /
			if (module.hot) {
			var log = require("./log");
			var checkForUpdate = function checkForUpdate(fromUpdate) {
			module.hot
			.check()
			.then(function (updatedModules) {
			if (!updatedModules) {
			if (fromUpdate) log("info", "[HMR] Update applied.");
			else log("warning", "[HMR] Cannot find update.");
			return;
			}

			return module.hot
			.apply({
			ignoreUnaccepted: true,
			onUnaccepted: function (data) {
			log(
			"warning",
			"Ignored an update to unaccepted module " +
			data.chain.join(" -> ")
			);
			}
			})
			.then(function (renewedModules) {
			require("./log-apply-result")(updatedModules, renewedModules);

			checkForUpdate(true);
			return null;
			});
			})
			.catch(function (err) {
			var status = module.hot.status();
			if (["abort", "fail"].indexOf(status) >= 0) {
			log("warning", "[HMR] Cannot apply update.");
			log("warning", "[HMR] " + log.formatError(err));
			log("warning", "[HMR] You need to restart the application!");
			} else {
			log("warning", "[HMR] Update failed: " + (err.stack \|\| err.message));
			}
			});
			};

			process.on(__resourceQuery.substr(1) \|\| "SIGUSR2", function () {
			if (module.hot.status() !== "idle") {
			log(
			"warning",
			"[HMR] Got signal but currently in " + module.hot.status() + " state."
			);
			log("warning", "[HMR] Need to be in idle state to start hot update.");
			return;
			}

			checkForUpdate();
			});
			} else {
			throw new Error("[HMR] Hot Module Replacement is disabled.");
			}