gen-test

#!/bin/sh -eu
# Use this to regenerate all the test data that's derived from .proto
# files.  This script only does so if any of the test files have
# changed, since it can't be done during CI, because it requires
# 'protoc' and 'protoc-gen-rust'.
dir=$(dirname "$0")
testdata="$dir/testdata"
hash="$testdata/hash"

# This dance is needed to make mktemp work on both Mac OS X and
# GNU/Linux
newhash=$(mktemp 2>/dev/null || mktemp -t "serde_protobuf-gen-test")

# This dance is needed to implement md5 sums on both Mac OS X and
# GNU/Linux
if which md5 1>/dev/null 2>/dev/null
then md5sum='md5 -r'
elif which md5sum 1>/dev/null 2>/dev/null
then md5sum='md5sum'
else echo 'No md5 utility found; exiting'; exit 1
fi

(cd "$testdata" && find . -type f \( -name '*.proto' -o -name '*.pb' \) -exec $md5sum {} \; | LC_ALL=C sort -k 2 | awk '{print $1, $2}'> "$newhash")

if [ ! -f "$hash" ] || ! diff "$hash" "$newhash"
then
    echo >&2 'Changes detected; rebuilding protobuf'
    mkdir -p "$dir/tests/protobuf_unittest"
    protoc -I "$testdata" --rust_out "$dir/tests/protobuf_unittest" "$testdata/google/protobuf/unittest.proto"
    protoc -I "$testdata" --rust_out "$dir/tests/protobuf_unittest" "$testdata/google/protobuf/unittest_import.proto"
    protoc -I "$testdata" --rust_out "$dir/tests/protobuf_unittest" "$testdata/google/protobuf/unittest_import_public.proto"
    protoc -I "$testdata" --include_imports -o "$testdata/descriptors.pb" "$testdata/google/protobuf/unittest.proto"
    mv "$newhash" "$hash"
else
    echo >&2 'Protobuf test data is up to date'
fi