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| example | 5 年之前 | |
| lib | 5 年之前 | |
| test | 5 年之前 | |
| .editorconfig | 5 年之前 | |
| .eslintignore | 5 年之前 | |
| .eslintrc | 5 年之前 | |
| .travis.yml | 5 年之前 | |
| LICENSE | 5 年之前 | |
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| index.js | 5 年之前 | |
| package.json | 5 年之前 | |
| readme.markdown | 5 年之前 | |
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.isDirectory - function to asynchronously test whether a directory exists
opts.realpath - function to asynchronously resolve a potential symlink to its real path
opts.packageFilter(pkg, pkgfile, 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)
For advanced users, paths can also be a opts.paths(request, start, opts) function
* request - the import specifier being resolved
* start - lookup path
* getNodeModulesDirs - a thunk (no-argument function) that returns the paths using standard `node_modules` resolution
* opts - the resolution options
opts.packageIterator(request, start, opts) - return the list of candidate paths where the packages sources may be found (probably don't use this)
node_modules resolutionopts.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);
});
},
isDirectory: function isDirectory(dir, cb) {
fs.stat(dir, function (err, stat) {
if (!err) {
return cb(null, stat.isDirectory());
}
if (err.code === 'ENOENT' || err.code === 'ENOTDIR') return cb(null, false);
return cb(err);
});
},
realpath: function realpath(file, cb) {
var realpath = typeof fs.realpath.native === 'function' ? fs.realpath.native : fs.realpath;
realpath(file, function (realPathErr, realPath) {
if (realPathErr && realPathErr.code !== 'ENOENT') cb(realPathErr);
else cb(null, realPathErr ? file : realPath);
});
},
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.isDirectory - function to synchronously test whether a directory exists
opts.realpathSync - function to synchronously resolve a potential symlink to its real path
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)
For advanced users, paths can also be a opts.paths(request, start, opts) function
* request - the import specifier being resolved
* start - lookup path
* getNodeModulesDirs - a thunk (no-argument function) that returns the paths using standard `node_modules` resolution
* opts - the resolution options
opts.packageIterator(request, start, opts) - return the list of candidate paths where the packages sources may be found (probably don't use this)
node_modules resolutionopts.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();
},
isDirectory: function isDirectory(dir) {
try {
var stat = fs.statSync(dir);
} catch (e) {
if (e && (e.code === 'ENOENT' || e.code === 'ENOTDIR')) return false;
throw e;
}
return stat.isDirectory();
},
realpathSync: function realpathSync(file) {
try {
var realpath = typeof fs.realpathSync.native === 'function' ? fs.realpathSync.native : fs.realpathSync;
return realpath(file);
} catch (realPathErr) {
if (realPathErr.code !== 'ENOENT') {
throw realPathErr;
}
}
return file;
},
moduleDirectory: 'node_modules',
preserveSymlinks: true
}
Return whether a package is in core.
With npm do:
npm install resolve
MIT