#!/bin/sh
# Copyright (c) Contributors to the Apptainer project, established as
#   Apptainer a Series of LF Projects LLC.
#   For website terms of use, trademark policy, privacy policy and other
#   project policies see https://lfprojects.org/policies

set -e

if test ! -e go.mod ; then
	echo "E: $PWD/go.mod not found. Abort."
	exit 1
fi

export GO111MODULE=on

# Make sure the index is updated
git update-index --refresh

if ! git diff-index --raw --exit-code HEAD ; then
	echo "E: Workspace is unexpectedly dirty. Abort."
	exit 2
fi

if ! go mod download ; then
	echo "E: Failed to download Go modules. Abort"
	exit 3
fi

if ! go mod verify > /dev/null ; then
	echo "E: Invalid Go module state. Abort."
	exit 4
fi

# Use the minimum go version for backward compatibility when different
# go versions are used on different operating systems
HERE=${0%/*}
PARENT=${HERE%/*}
if [ "$PARENT" = "$HERE" ]; then
    PARENT=.
fi
eval `grep ^hstgo_version= ${PARENT}/mconfig`

if ! go mod tidy -go=$hstgo_version; then
	echo "E: Failed to run go mod tidy. Abort."
	exit 5
fi

# The go mod tidy command above might have updated go.mod or go.sum.
# The next command tells git that things _might_ have been modified so
# it should check that.
git update-index --refresh

if ! git diff-index --raw --exit-code HEAD ; then
	echo "E: Workspace became dirty after running 'go mod tidy'. Abort."
	exit 6
fi

echo "I: go.mod OK."
exit 0