gistfile1.txt

#!/usr/bin/env bash

# Redirect output to stderr.
exec 1>&2

# list staged go files
lsgo() {
        git ls-files|egrep '.*.go$'
}

# get the contents of $1 from the staging area
# (the staging area is the stuff that will be committed)
catstaged() {
        git cat-file -p :$1
}

check() {
        if test -n "`gofmt -d <(catstaged $1)`"
        then echo error: gofmt $1 && return 1
        fi
}

ok=true
for file in `lsgo`
do check $file || ok=false
done
test $ok = true