angular-docs-cn/tools/check-environment.js

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/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!! !!!
!!! This file is special in that it must be able to execute with wrong Node version !!!
!!! or even when node_modules are missing. !!!
!!! !!!
!!! Do not depend on Node4+ features or presence of npm packages here. !!!
!!! !!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
'use strict';
var exec = require('child_process').exec;
var checkNodeModules;
var semver;
var issues = [];
// coarse Node version check
if (Number.parseInt(process.version[1], 10) < 5) {
issues.push("Angular 2 build currently requires Node 5. Use nvm to update your node version.");
}
try {
semver = require('semver');
} catch(e) {
issues.push("Looks like you are missing some npm dependencies. Run: npm install");
}
if (issues.length) {
printWarning(issues);
console.error("Your environment doesn't provide the prerequisite dependencies.\n" +
"Please fix the issues listed above and then rerun the gulp command.\n" +
"Check out https://github.com/angular/angular/blob/master/DEVELOPER.md for more info.");
process.exit(1);
}
// wrap in try/catch in case someone requires from within that file
try {
checkNodeModules = require('./npm/check-node-modules.js');
} catch(e) {
issues.push("Looks like you are missing some npm dependencies. Run: npm install");
throw e;
} finally {
// print warnings and move on, the next steps will likely fail, but hey, we warned them.
printWarning(issues);
}
function checkEnvironment(reqs) {
exec('npm --version', function(e, stdout) {
var foundNpmVersion = semver.clean(stdout);
var foundNodeVersion = process.version;
var issues = [];
if (!semver.satisfies(foundNodeVersion, reqs.requiredNodeVersion)) {
issues.push('You are running unsupported node version. Found: ' + foundNodeVersion +
' Expected: ' + reqs.requiredNodeVersion + '. Use nvm to update your node version.');
}
if (!semver.satisfies(foundNpmVersion, reqs.requiredNpmVersion)) {
issues.push('You are running unsupported npm version. Found: ' + foundNpmVersion +
' Expected: ' + reqs.requiredNpmVersion + '. Run: npm update -g npm');
}
if (!checkNodeModules()) {
issues.push('Your node_modules directory is stale or out of sync with npm-shrinkwrap.json. Run: npm install');
}
printWarning(issues);
});
}
function printWarning(issues) {
if (!issues.length) return;
console.warn('');
console.warn(Array(110).join('!'));
console.warn('!!! Your environment is not in a good shape. Following issues were found:');
issues.forEach(function(issue) {console.warn('!!! - ' + issue);});
console.warn(Array(110).join('!'));
console.warn('');
if (process.env.CI) {
process.exit(1);
}
}
module.exports = checkEnvironment;