94 lines
2.8 KiB
JavaScript
94 lines
2.8 KiB
JavaScript
|
var core = require('./core');
|
||
|
|
var fs = require('fs');
|
||
|
|
var path = require('path');
|
||
|
|
var caller = require('./caller.js');
|
||
|
|
var nodeModulesPaths = require('./node-modules-paths.js');
|
||
|
|
|
||
|
|
module.exports = function (x, options) {
|
||
|
|
if (typeof x !== 'string') {
|
||
|
|
throw new TypeError('Path must be a string.');
|
||
|
|
}
|
||
|
|
var opts = options || {};
|
||
|
|
var isFile = opts.isFile || function (file) {
|
||
|
|
try {
|
||
|
|
var stat = fs.statSync(file);
|
||
|
|
} catch (e) {
|
||
|
|
if (e && (e.code === 'ENOENT' || e.code === 'ENOTDIR')) return false;
|
||
|
|
throw e;
|
||
|
|
}
|
||
|
|
return stat.isFile() || stat.isFIFO();
|
||
|
|
};
|
||
|
|
var readFileSync = opts.readFileSync || fs.readFileSync;
|
||
|
|
|
||
|
|
var extensions = opts.extensions || ['.js'];
|
||
|
|
var y = opts.basedir || path.dirname(caller());
|
||
|
|
|
||
|
|
opts.paths = opts.paths || [];
|
||
|
|
|
||
|
|
if (/^(?:\.\.?(?:\/|$)|\/|([A-Za-z]:)?[/\\])/.test(x)) {
|
||
|
|
var res = path.resolve(y, x);
|
||
|
|
if (x === '..' || x.slice(-1) === '/') res += '/';
|
||
|
|
var m = loadAsFileSync(res) || loadAsDirectorySync(res);
|
||
|
|
if (m) return m;
|
||
|
|
} else {
|
||
|
|
var n = loadNodeModulesSync(x, y);
|
||
|
|
if (n) return n;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (core[x]) return x;
|
||
|
|
|
||
|
|
var err = new Error("Cannot find module '" + x + "' from '" + y + "'");
|
||
|
|
err.code = 'MODULE_NOT_FOUND';
|
||
|
|
throw err;
|
||
|
|
|
||
|
|
function loadAsFileSync(x) {
|
||
|
|
if (isFile(x)) {
|
||
|
|
return x;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (var i = 0; i < extensions.length; i++) {
|
||
|
|
var file = x + extensions[i];
|
||
|
|
if (isFile(file)) {
|
||
|
|
return file;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function loadAsDirectorySync(x) {
|
||
|
|
var pkgfile = path.join(x, '/package.json');
|
||
|
|
if (isFile(pkgfile)) {
|
||
|
|
try {
|
||
|
|
var body = readFileSync(pkgfile, 'UTF8');
|
||
|
|
var pkg = JSON.parse(body);
|
||
|
|
|
||
|
|
if (opts.packageFilter) {
|
||
|
|
pkg = opts.packageFilter(pkg, x);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pkg.main) {
|
||
|
|
if (pkg.main === '.' || pkg.main === './') {
|
||
|
|
pkg.main = 'index';
|
||
|
|
}
|
||
|
|
var m = loadAsFileSync(path.resolve(x, pkg.main));
|
||
|
|
if (m) return m;
|
||
|
|
var n = loadAsDirectorySync(path.resolve(x, pkg.main));
|
||
|
|
if (n) return n;
|
||
|
|
}
|
||
|
|
} catch (e) {}
|
||
|
|
}
|
||
|
|
|
||
|
|
return loadAsFileSync(path.join(x, '/index'));
|
||
|
|
}
|
||
|
|
|
||
|
|
function loadNodeModulesSync(x, start) {
|
||
|
|
var dirs = nodeModulesPaths(start, opts);
|
||
|
|
for (var i = 0; i < dirs.length; i++) {
|
||
|
|
var dir = dirs[i];
|
||
|
|
var m = loadAsFileSync(path.join(dir, '/', x));
|
||
|
|
if (m) return m;
|
||
|
|
var n = loadAsDirectorySync(path.join(dir, '/', x));
|
||
|
|
if (n) return n;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|