symlink()

优质

小牛编辑

138浏览

2023-12-01

创建一个流（stream），用于连接 Vinyl 对象到文件系统。

用法

const { src, symlink } = require('gulp');

function link() {
  return src('input/*.js')
    .pipe(symlink('output/'));
}

exports.link = link;

函数原型

symlink(directory, [options])

参数

参数类型描述

directory
(required) string
function The path of the output directory where symbolic links will be created. If a function is used, the function will be called with each Vinyl object and must return a string directory path.

options

object

Detailed in 返回值

A stream that can be used in the middle or at the end of a pipeline to create symbolic links on the file system. Whenever a Vinyl object is passed through the stream, it creates a symbolic link to the original file on the file system at the given directory.

Whenever a symbolic link is created on the file system, the Vinyl object will be modified.

The cwd, base, and path properties will be updated to match the created symbolic link.
The stat property will be updated to match the symbolic link on the file system.
The contents property will be set to null.
The symlink property will be added or replaced with original path.

Note: On Windows, directory links are created using junctions by default. The useJunctions option disables this behavior.

可能出现的错误

When directory is an empty string, throws an error with the message, "Invalid symlink() folder argument. Please specify a non-empty string or a function."

When directory is not a string or function, throws an error with the message, "Invalid symlink() folder argument. Please specify a non-empty string or a function."

When directory is a function that returns an empty string or undefined, emits an error with the message, "Invalid output folder".

选项

对于接受函数的选项，传递的函数将与每个 Vinyl 对象一起调用，并且必须返回另一个列出类型的值。

name	type	default	note
cwd	string function	`process.cwd()`	The directory that will be combined with any relative path to form an absolute path. Is ignored for absolute paths. Use to avoid combining `directory` with `path.join()`.
dirMode	number function		The mode used when creating directories. If not set, the process' mode will be used.
overwrite	boolean function	true	When true, overwrites existing files with the same path.
relativeSymlinks	boolean function	false	When false, any symbolic links created will be absolute. Note: Ignored if a junction is being created, as they must be absolute.
useJunctions	boolean function	true	This option is only relevant on Windows and ignored elsewhere. When true, creates directory symbolic link as a junction. Detailed in Symbolic links on Windows When creating symbolic links on Windows, a `type` argument is passed to Node's `fs.symlink()` method which specifies the type of target being linked. The link type is set to: `'file'` when the target is a regular file `'junction'` when the target is a directory `'dir'` when the target is a directory and the user disables the `useJunctions` option If you try to create a dangling (pointing to a non-existent target) link, the link type can't be determined automatically. In these cases, behavior will vary depending on whether the dangling link is being created via `symlink()` or via `dest()`. For dangling links created via `symlink()`, the incoming Vinyl object represents the target, so its stats will determine the desired link type. If `isDirectory()` returns false then a `'file'` link is created, otherwise a `'junction'` or `'dir'` link is created depending on the value of the `useJunctions` option. For dangling links created via `dest()`, the incoming Vinyl object represents the link - typically loaded from disk via `src(..., { resolveSymlinks: false })`. In this case, the link type can't be reasonably determined and defaults to using `'file'`. This may cause unexpected behavior when creating a dangling link to a directory. Avoid this scenario.