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# cleanpath
[](https://github.com/jhunkeler/cleanpath/actions/workflows/cmake.yml)
`cleanpath` is a utility that filters unwanted elements from an environment variable.
# Installation
```shell
$ git clone https://github.com/jhunkeler/cleanpath
$ cd cleanpath
$ mkdir -p build
$ cmake .. -DCMAKE_INSTALL_PREFIX=$HOME/.local
$ make install
```
# Usage
```shell
usage: cleanpath [-hVelrsv] [pattern ...]
--help -h Displays this help message
--version -V Displays the program's version
--exact -e Filter when pattern is an exact match (default)
--loose -l Filter when any part of the pattern matches
--regex -r Filter matches with (Extended) Regular Expressions
--sep [str] -s Use custom path separator (default: ':')
--env [str] -E Use custom environment variable (default: PATH)
```
# Example
A typical MacOS path with Macports installed:
```shell
/opt/local/bin:/opt/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/Library/Apple/usr/bin
```
## Remove MacPorts from the PATH
### Exact match (default)
```shell
$ cleanpath /opt/local/bin /opt/local/sbin
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/Library/Apple/usr/bin
```
### Loose match
```shell
$ cleanpath -l /opt/local
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/Library/Apple/usr/bin
```
### Regex match
```shell
$ cleanpath -r ^/opt/local/.*
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/Library/Apple/usr/bin
```
## Modifying other environment variables
```shell
$ TESTVAR=a:b/c:d/e:f
$ cleanpath -E TESTVAR -s / -l c
a:b/e:f
```
## Using cleanpath in a script
```shell
#!/usr/bin/env bash
# Remove MacPorts and Fink
PATH=$(cleanpath -r '^/opt/local/.*' '^/opt/sw/.*')
export PATH
```
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