git pre-commit hook for go projects

pre-commit.sh

#!/bin/sh

echo "ℹ️  Running pre-commit hook"

# go to git root
pushd `git rev-parse --show-toplevel` > /dev/null

STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep ".go$")

if [[ "$STAGED_FILES" = "" ]]; then
  popd > /dev/null
  exit 0
fi

GOFUMPTD_FILES=$(gofumpt -l -w $STAGED_FILES)
if [ -n "$GOFUMPTD_FILES" ];then
  echo "⛔️ \x1b[31mFollowing files were gofumpt'd. Please review the changes and stage the files again.\x1b[0m"
  echo "$GOFUMPTD_FILES"
else
  echo "👌 \x1b[32mAll files are gofumpt'd.\x1b[0m"
fi

echo "ℹ️  Linting..."
LINT_ERRORS_1=$(golangci-lint run --tests=true --fix=true --config .golangci.yaml --build-tags="tags" --new-from-rev="$(git rev-parse HEAD)")
LINT_ERRORS_2=$(golangci-lint run --tests=true --fix=true --config .golangci.yaml --build-tags="tags" --new-from-rev="$(git rev-parse HEAD)")
if [ -n "${LINT_ERRORS_1}" ] || [ -n "${LINT_ERRORS_2}" ]; then
  echo "⛔️ \x1b[31mLint errors:\x1b[0m"
  echo "${LINT_ERRORS_1}"
  echo "${LINT_ERRORS_2}"
  popd > /dev/null
  exit 1
else
  echo "👌 \x1b[32mLint passed.\x1b[0m"
fi

if [ -n "$GOFUMPTD_FILES" ];then
  popd > /dev/null
  exit 1
fi

popd > /dev/null