| 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | Author Tobias Koppers @sokra
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| 4 | */
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| 5 | /*globals __resourceQuery */
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| 6 | if (module.hot) {
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| 7 | var log = require("./log");
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| 8 | var checkForUpdate = function checkForUpdate(fromUpdate) {
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| 9 | module.hot
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| 10 | .check()
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| 11 | .then(function (updatedModules) {
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| 12 | if (!updatedModules) {
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| 13 | if (fromUpdate) log("info", "[HMR] Update applied.");
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| 14 | else log("warning", "[HMR] Cannot find update.");
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| 15 | return;
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| 16 | }
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| 17 |
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| 18 | return module.hot
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| 19 | .apply({
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| 20 | ignoreUnaccepted: true,
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| 21 | onUnaccepted: function (data) {
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| 22 | log(
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| 23 | "warning",
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| 24 | "Ignored an update to unaccepted module " +
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| 25 | data.chain.join(" -> ")
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| 26 | );
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| 27 | }
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| 28 | })
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| 29 | .then(function (renewedModules) {
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| 30 | require("./log-apply-result")(updatedModules, renewedModules);
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| 31 |
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| 32 | checkForUpdate(true);
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| 33 | return null;
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| 34 | });
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| 35 | })
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| 36 | .catch(function (err) {
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| 37 | var status = module.hot.status();
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| 38 | if (["abort", "fail"].indexOf(status) >= 0) {
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| 39 | log("warning", "[HMR] Cannot apply update.");
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| 40 | log("warning", "[HMR] " + log.formatError(err));
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| 41 | log("warning", "[HMR] You need to restart the application!");
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| 42 | } else {
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| 43 | log("warning", "[HMR] Update failed: " + (err.stack || err.message));
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| 44 | }
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| 45 | });
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| 46 | };
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| 47 |
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| 48 | process.on(__resourceQuery.substr(1) || "SIGUSR2", function () {
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| 49 | if (module.hot.status() !== "idle") {
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| 50 | log(
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| 51 | "warning",
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| 52 | "[HMR] Got signal but currently in " + module.hot.status() + " state."
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| 53 | );
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| 54 | log("warning", "[HMR] Need to be in idle state to start hot update.");
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| 55 | return;
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| 56 | }
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| 57 |
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| 58 | checkForUpdate();
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| 59 | });
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| 60 | } else {
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| 61 | throw new Error("[HMR] Hot Module Replacement is disabled.");
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| 62 | }
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