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Run Go program as script
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| //usr/bin/env go run $0 "$@"; exit | |
| package main | |
| import ( | |
| "fmt" | |
| "os" | |
| ) | |
| func main() { | |
| fmt.Println("Hello world!") | |
| cwd, _ := os.Getwd() | |
| fmt.Println("cwd:", cwd) | |
| fmt.Println("args:", os.Args[1:]) | |
| } |
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Why this works: http://www.faqs.org/faqs/unix-faq/faq/part3/section-16.html
tl;dr: magic number not detected (e.g. shebang
#!), so falls back to treating like a script and running it with/bin/sh. The first line coincidentally is a call toenvand a comment in Golang, so this happens to work. It callsgo runwith the same file path, and exits at the end of that first invocation. Go ignores the exit because it's in the comment, and runs the Go code instead.Nifty!