Pre-commit hook for Golang formatting and linting

_readme.md

Pre-commit git hook to require Golang formatting and linting

1. Add this file in a local repo at .githooks/pre-commit.
2. git config core.hooksPath .githooks sets up the hook

pre-commit

#!/bin/sh

STAGED_GO_FILES=$(git diff --cached --name-only --diff-filter ACMR | grep ".go$" | grep -v '^vendor/')

if [ "$STAGED_GO_FILES" = "" ]
  then exit 0
fi

directories=""
for filename in $STAGED_GO_FILES
  do directories="$directories $(dirname $filename)"
done

STAGED_GO_PACKAGES=$(echo "$directories" | tr " " "\n" | sort | uniq)

PASS=true

if ! gofmt -s -w $STAGED_GO_FILES
  then PASS=false
fi

if ! golangci-lint run --fix $STAGED_GO_PACKAGES
  then PASS=false
fi

if ! git add $STAGED_GO_FILES
  then PASS=false
fi

if [ "$PASS" = "false" ]
  then exit 1
fi