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context.js
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context.js
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'use strict';
const weblog = require('webpack-log');
module.exports = function ctx(compiler, options) {
const context = {
state: false,
webpackStats: null,
callbacks: [],
options,
compiler,
watching: null,
forceRebuild: false
};
if (options.logger) {
context.log = options.logger;
} else {
context.log = weblog({
level: options.logLevel || 'info',
name: 'wdm',
timestamp: options.logTime
});
}
const { log } = context;
function done(stats) {
// We are now on valid state
context.state = true;
context.webpackStats = stats;
// Do the stuff in nextTick, because bundle may be invalidated
// if a change happened while compiling
process.nextTick(() => {
// check if still in valid state
if (!context.state) {
return;
}
// print webpack output
context.options.reporter(context.options, {
log,
state: true,
stats
});
// execute callback that are delayed
const cbs = context.callbacks;
context.callbacks = [];
cbs.forEach((cb) => {
cb(stats);
});
});
// In lazy mode, we may issue another rebuild
if (context.forceRebuild) {
context.forceRebuild = false;
rebuild();
}
}
function invalid(...args) {
if (context.state) {
context.options.reporter(context.options, {
log,
state: false
});
}
// We are now in invalid state
context.state = false;
// resolve async
if (args.length === 2 && typeof args[1] === 'function') {
const [, callback] = args;
callback();
}
}
function rebuild() {
if (context.state) {
context.state = false;
context.compiler.run((err) => {
if (err) {
log.error(err.stack || err);
if (err.details) {
log.error(err.details);
}
}
});
} else {
context.forceRebuild = true;
}
}
context.rebuild = rebuild;
context.compiler.plugin('invalid', invalid);
context.compiler.plugin('run', invalid);
context.compiler.plugin('done', (stats) => {
// clean up the time offset
if (options.watchOffset > 0) {
stats.startTime -= options.watchOffset;
}
done(stats);
});
context.compiler.plugin('watch-run', (watcher, callback) => {
// apply a fix for compiler.watch, if watchOffset is greater than 0:
// ff0000-ad-tech/wp-plugin-watch-offset
// offset start-time
if (options.watchOffset > 0) {
watcher.startTime += options.watchOffset;
}
invalid(watcher, callback);
});
return context;
};