#!/bin/sh
# Copyright 2012 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.

# git gofmt, go vet, and golint pre-push hook
#
# To use, store as .git/hooks/pre-push inside your repository and make
# sure it has execute permissions. This can be used instead of the
# pre-commit hook for workflows where the cleanliness of each
# individual commit doesn't matter (e.g., ones that squash commits
# before pushing).
#
# This script does not handle file names that contain spaces.

# Please keep this file in sync with pre-commit. (See pre-commit for
# comments as to why we duplicate the code here.) The only difference
# is that we don't do a git diff check in this file, since that only
# applies to an unapplied commit.
#
# TODO: It might be possible to do something similar to the git diff
# check, but comparing against the remote HEAD, which is passed in as
# one of the parameters.

# Resolve the repo root in case it's a symlink.
cd "$(git rev-parse --show-toplevel)"

check_go_fmt() {
	gofiles=$(git ls-files | grep '.go$' | grep -v go/vendor/ | grep -v vendor/)
	[ -z "$gofiles" ] && return 0

	unformatted=$(gofmt -l $gofiles)
	[ -z "$unformatted" ] && return 0

	# Some files are not gofmt'd. Print message and fail.

	echo >&2 "Go files must be formatted with gofmt. Please run:"
	for fn in $unformatted; do
		echo >&2 "  gofmt -w $PWD/$fn"
	done

	exit 1
}

check_go_vet() {
    	warnings=$(go vet $(go list ./... 2>/dev/null | grep -v vendor) 2>&1)
	[ -z "$warnings" ] && return 0

	# go vet found issues

	echo >&2 "go vet found issues:"
	echo >&2 $warnings

	exit 1
}

check_make_lint() {
    if ! which golint > /dev/null 2>&1 ; then
      echo >&2 "golint is not installed"
      exit 1
    fi
    # Try the root dir.  If that doesn't work, see if there's a go subdir.
    lint=$(make -s lint 2> /dev/null)
    if [ $? -eq 2 ] ; then
        lint=$(make -s -C go lint 2> /dev/null)
    fi
    [ -z "$lint" -o "$lint" = "Lint-free!" ] && return 0

    # make lint found issues
    echo >&2 "go lint found issues:"
    echo >&2 "$lint"

    exit 1
}

#-----------------------------------------------------------------------------

check_go_fmt
check_go_vet
check_make_lint
