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implements the node require.resolve()
algorithm
such that you can require.resolve() on behalf of a file asynchronously and
synchronously
asynchronously resolve:
var resolve = require('resolve');
resolve('tap', { basedir: __dirname }, function (err, res) {
if (err) console.error(err)
else console.log(res)
});
$ node example/async.js
/home/substack/projects/node-resolve/node_modules/tap/lib/main.js
synchronously resolve:
var resolve = require('resolve');
var res = resolve.sync('tap', { basedir: __dirname });
console.log(res);
$ node example/sync.js
/home/substack/projects/node-resolve/node_modules/tap/lib/main.js
var resolve = require('resolve')
Asynchronously resolve the module path string id into cb(err, res [, pkg]), where pkg (if defined) is the data from package.json.
options are:
opts.basedir - directory to begin resolving from
opts.package - package.json data applicable to the module being loaded
opts.extensions - array of file extensions to search in order
opts.readFile - how to read files asynchronously
opts.isFile - function to asynchronously test whether a file exists
opts.packageFilter(pkg, pkgfile) - transform the parsed package.json contents before looking at the "main" field
opts.pathFilter(pkg, path, relativePath) - transform a path within a package
opts.paths - require.paths array to use if nothing is found on the normal node_modules recursive walk (probably don't use this)
opts.moduleDirectory - directory (or directories) in which to recursively look for modules. default: "node_modules"
opts.preserveSymlinks - if true, doesn't resolve basedir to real path before resolving.
This is the way Node resolves dependencies when executed with the --preserve-symlinks flag.
Note: this property is currently true by default but it will be changed to
false in the next major version because Node's resolution algorithm does not preserve symlinks by default.
default opts values:
{
paths: [],
basedir: __dirname,
extensions: [ '.js' ],
readFile: fs.readFile,
isFile: function isFile(file, cb) {
fs.stat(file, function (err, stat) {
if (!err) {
return cb(null, stat.isFile() || stat.isFIFO());
}
if (err.code === 'ENOENT' || err.code === 'ENOTDIR') return cb(null, false);
return cb(err);
});
},
moduleDirectory: 'node_modules',
preserveSymlinks: true
}
Synchronously resolve the module path string id, returning the result and
throwing an error when id can't be resolved.
options are:
opts.basedir - directory to begin resolving from
opts.extensions - array of file extensions to search in order
opts.readFile - how to read files synchronously
opts.isFile - function to synchronously test whether a file exists
opts.packageFilter(pkg, dir) - transform the parsed package.json contents before looking at the "main" field
opts.pathFilter(pkg, path, relativePath) - transform a path within a package
opts.paths - require.paths array to use if nothing is found on the normal node_modules recursive walk (probably don't use this)
opts.moduleDirectory - directory (or directories) in which to recursively look for modules. default: "node_modules"
opts.preserveSymlinks - if true, doesn't resolve basedir to real path before resolving.
This is the way Node resolves dependencies when executed with the --preserve-symlinks flag.
Note: this property is currently true by default but it will be changed to
false in the next major version because Node's resolution algorithm does not preserve symlinks by default.
default opts values:
{
paths: [],
basedir: __dirname,
extensions: [ '.js' ],
readFileSync: fs.readFileSync,
isFile: function isFile(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();
},
moduleDirectory: 'node_modules',
preserveSymlinks: true
}
````
## resolve.isCore(pkg)
Return whether a package is in core.
# install
With [npm](https://npmjs.org) do:
npm install resolve ```
MIT