@antora/expand-path-helper

A Node.js module that provides a helper function to expand a path to a normalized absolute path. This function also expands the following shorthand expressions when used as the first path segment: dot (.), tilde (~), or tilde plus (~+). The expanded path is system dependent. Developed for use in Antora.

Install

$ npm i @antora/expand-path-helper

API

function expandPath (path[, context])

Expands the specified path to a normalized absolute path. The main purpose of this function is path expansion and normalization.

path <string> - The path to expand. This parameter is required. If the path is already absolute, the path is normalized and returned.
context <Object> - Named parameters that control how the path is resolved. All named parameters are optional. This parameter can also be specified as a String, in which case it’s used as the base context argument. Default: {}.
- base <string> - The base directory from which to resolve a relative path instead of the working directory. Default: ~+
- cwd <string> - The absolute directory to use as the working directory instead of the current working directory. If not specified, the current working directory is used. Default: undefined
- dot <string> - The value to use to replace a leading dot (.) segment. If the value is ., the value of the base context argument is used instead. Default: .

If the first segment of the path argument, the base context argument, or the dot context argument is ~ or ~+, that value is expanded to the user’s home directory or current working directory, respectively. If the first segment of the path argument is ., that value is replaced with the dot context argument after the dot context argument is expanded.

Usage

The output of expandPath depends on the system on which it is run (specifically on the path.sep value).

*nix

const expandPath = require('@antora/expand-path-helper')

expandPath('/absolute/path')
//=> /absolute/path

expandPath('/absolute/./path/..')
//=> /absolute

expandPath('foo/bar')
//=> $PWD/foo/bar

expandPath('./foo/bar')
//=> $PWD/foo/bar

expandPath('~/foo/bar')
//=> $HOME/foo/bar

expandPath('~+/foo/bar')
//=> $PWD/foo/bar

expandPath('~+/foo/bar', { cwd: '/working/dir' })
//=> /working/dir/foo/bar

expandPath('foo/bar', '/base/dir')
//=> /base/dir/foo/bar

expandPath('foo/bar', { base: '/base/dir' })
//=> /base/dir/foo/bar

expandPath('./foo/bar', { base: '/base/dir' })
//=> /base/dir/foo/bar

expandPath('./foo/bar', { dot: '/dot/dir' })
//=> /dot/dir/foo/bar

Windows

const expandPath = require('@antora/expand-path-helper')

expandPath('C:\\absolute\\path')
//=> C:\absolute\path

expandPath('C:/absolute/path')
//=> C:\absolute\path

expandPath('C:\\absolute\\.\\path\\..')
//=> C:\absolute

expandPath('foo\\bar')
//=> C:\current\directory\foo\bar

expandPath('.\\foo\\bar')
//=> C:\current\directory\foo\bar

expandPath('~\\foo\\bar')
//=> C:\Users\user\foo\bar

expandPath('~+\\foo\\bar')
//=> C:\current\directory\foo\bar

expandPath('~+\\foo\\bar', { cwd: 'C:\\working\\dir' })
//=> C:\working\dir\foo\bar

expandPath('foo\\bar', 'C:\\base\\dir')
//=> C:\base\dir\foo\bar

expandPath('foo\\bar', { base: 'C:\\base\\dir' })
//=> C:\base\dir\foo\bar

expandPath('.\\foo\\bar', { base: 'C:\\base\\dir' })
//=> C:\base\dir\foo\bar

expandPath('.\\foo\\bar', { dot: 'C:\\dot\\dir' })
//=> C:\dot\dir\foo\bar

On Windows, the input path may use forward slashes, but the expanded path will always have backslashes.

Copyright and License

Use of this software is granted under the terms of the Mozilla Public License Version 2.0 (MPL-2.0).

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