'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(callback) {
|
if (context.state) {
|
context.options.reporter(context.options, {
|
log,
|
state: false,
|
});
|
}
|
|
// We are now in invalid state
|
context.state = false;
|
if (typeof callback === 'function') {
|
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.hooks.invalid.tap('WebpackDevMiddleware', invalid);
|
context.compiler.hooks.run.tap('WebpackDevMiddleware', invalid);
|
context.compiler.hooks.done.tap('WebpackDevMiddleware', done);
|
context.compiler.hooks.watchRun.tap(
|
'WebpackDevMiddleware',
|
(comp, callback) => {
|
invalid(callback);
|
}
|
);
|
|
return context;
|
};
|
