mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
36 lines
1.5 KiB
36 lines
1.5 KiB
11 years ago
|
# Is This Path Inside This Other Path?
|
||
|
|
|
||
|
|
It turns out this question isn't trivial to answer using Node's built-in path APIs. A naive `indexOf`-based solution will fail sometimes on Windows, which is case-insensitive (see e.g. [isaacs/npm#4214][]). You might then think to be clever with `path.resolve`, but you have to be careful to account for situations whether the paths have different drive letters, or else you'll cause bugs like [isaacs/npm#4313][]. And let's not even get started on trailing slashes.
|
||
|
|
|
||
|
|
The **path-is-inside** package will give you a robust, cross-platform way of detecting whether a given path is inside another path.
|
||
|
|
|
||
|
|
## Usage
|
||
|
|
|
||
|
|
Pretty simple. First the path being tested; then the potential parent. Like so:
|
||
|
|
|
||
|
|
```js
|
||
|
|
var pathIsInside = require("path-is-inside");
|
||
|
|
|
||
|
|
pathIsInside("/x/y/z", "/x/y") // true
|
||
|
|
pathIsInside("/x/y", "/x/y/z") // false
|
||
|
|
```
|
||
|
|
|
||
|
|
## OS-Specific Behavior
|
||
|
|
|
||
|
|
Like Node's built-in path module, path-is-inside treats all file paths on Windows as case-insensitive, whereas it treats all file paths on *-nix operating systems as case-sensitive. Keep this in mind especially when working on a Mac, where, despite Node's defaults, the OS usually treats paths case-insensitively.
|
||
|
|
|
||
|
|
In practice, this means:
|
||
|
|
|
||
|
|
```js
|
||
|
|
// On Windows
|
||
|
|
|
||
|
|
pathIsInside("C:\\X\\Y\\Z", "C:\\x\\y") // true
|
||
|
|
|
||
|
|
// On *-nix, including Mac OS X
|
||
|
|
|
||
|
|
pathIsInside("/X/Y/Z", "/x/y") // false
|
||
|
|
```
|
||
|
|
|
||
|
|
[isaacs/npm#4214]: https://github.com/isaacs/npm/pull/4214
|
||
|
|
[isaacs/npm#4313]: https://github.com/isaacs/npm/issues/4313
|