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example | ||
lib | ||
test | ||
.editorconfig | ||
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LICENSE | ||
appveyor.yml | ||
index.js | ||
package.json | ||
readme.markdown |
readme.markdown
resolve
implements the node require.resolve()
algorithm
such that you can require.resolve()
on behalf of a file asynchronously and
synchronously
example
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
methods
var resolve = require('resolve')
resolve(id, opts={}, cb)
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 - transform the parsed package.json contents before looking at the "main" field
-
opts.pathFilter(pkg, path, relativePath) - transform a path within a package
- pkg - package data
- path - the path being resolved
- relativePath - the path relative from the package.json location
- returns - a relative path that will be joined from the package.json location
-
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 currentlytrue
by default but it will be changed tofalse
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 (file, cb) {
fs.stat(file, function (err, stat) {
if (err && err.code === 'ENOENT') cb(null, false)
else if (err) cb(err)
else cb(null, stat.isFile())
});
},
moduleDirectory: 'node_modules',
preserveSymlinks: true
}
resolve.sync(id, opts)
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, pkgfile)
- transform the parsed package.json -
contents before looking at the "main" field
-
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 currentlytrue
by default but it will be changed tofalse
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 (file) {
try { return fs.statSync(file).isFile() }
catch (e) { return false }
},
moduleDirectory: 'node_modules',
preserveSymlinks: true
}
resolve.isCore(pkg)
Return whether a package is in core.
install
With npm do:
npm install resolve
license
MIT