hairyhenderson/go-which

# go-which [][build-url] [][dockerhub-url] [][godocs] A cross-platform Go implementation of the `which(1)` command, usable both as a CLI and library. Usage of which: -a List all instances of executables found (instead of just the first). -s No output, just return 0 if all executables are found, or 1 if some were not found. -v Print the version Unlike the UNIX `which(1)` command, even if multiple programs are given as input, only the first one found will be returned. ## CLI Usage Chances are you don't really need this, since most UNIX-like OSes come with the more established (and significantly smaller) C implementation of `which(1)`, either as a standalone binary, or as a shell builtin. _But_ if there's some reason this may be useful to you, you can use this just like the normal `which(1)`: $ which zsh /usr/local/bin/zsh $ which -a zsh /usr/local/bin/zsh /bin/zsh $ which zsh bash sh /usr/local/bin/zsh $ which -a zsh bash sh /usr/local/bin/zsh /bin/zsh /bin/bash /bin/sh $ if (which -s zsh bash); then > echo 'I have zsh and bash installed'; > fi I have zsh and bash installed $ if (which -s zsh bash ash); then echo 'yup' > else > echo "I'm missing one of them..."; > fi I'm missing one of them... ## Go package usage If you're writing a program in the Go language, it can be useful to not have to shell out to `which(1)` to locate a binary. The simplest usage is: package main import ( "fmt" "github.com/hairyhenderson/go-which" ) func main() { zshPath := which.Which("zsh") fmt.Printf("zsh found at %s", zshPath) } See the [godocs][] for more information. ## License [The MIT License](http://opensource.org/licenses/MIT) Copyright (c) 2018-2020 Dave Henderson

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