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build: generate protobuf messages in tempdir

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This way, if the process fails, the files in trezorlib/messages remain
untouched. This is important because "setup.py build" now runs the
build_protobuf tool, and it can easily fail on a system without protoc.
This commit is contained in:
matejcik 2018-03-26 18:55:45 +02:00
parent 3f35475e7b
commit 04326749f4
1 changed files with 30 additions and 14 deletions
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44
tools/build_protobuf
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@ -3,30 +3,46 @@ set -e
cd "$(dirname "$0")"
# set up paths
INDEX="__init__.py"
GENPATH="../trezorlib/messages"
INDEX="$GENPATH/__init__.py"
PROTO_PATH="../vendor/trezor-common/protob"
PROTO_FILES="types messages"
PB2_OUT="pb2"
rm -f "$GENPATH/[A-Z]*.py"
mkdir -p "$GENPATH"
# set up temporary directory & cleanup
TMPDIR=$(mktemp -d)
function cleanup {
rm -r $TMPDIR
}
trap cleanup EXIT
cat > "$INDEX" << EOF
# set up pb2 outdir
PB2_OUT="$TMPDIR/pb2"
mkdir -p "$PB2_OUT"
# compile .proto files to python2 modules using google protobuf library
for file in $PROTO_FILES; do
protoc --python_out="$PB2_OUT" -I/usr/include -I"$PROTO_PATH" "$PROTO_PATH/$file.proto"
done
# create index (__init__.py)
cat > "$TMPDIR/$INDEX" << EOF
# Automatically generated by pb2py
EOF
mkdir -p "$PB2_OUT"
# convert google protobuf library to trezor's internal format
for file in $PROTO_FILES; do
# Compile .proto files to python2 modules using google protobuf library
protoc --python_out="$PB2_OUT" -I/usr/include -I"$PROTO_PATH" "$PROTO_PATH/$file.proto"
./pb2py -P "trezorlib.protobuf" -p "$PB2_OUT" -l "$TMPDIR/$INDEX" "$file" "$TMPDIR"
done
for file in $PROTO_FILES; do
# Convert google protobuf library to trezor's internal format
./pb2py -P "trezorlib.protobuf" -p "$PB2_OUT" -l "$INDEX" "$file" "$GENPATH"
done
# ensure $GENPATH exists and is empty of messages
mkdir -p "$GENPATH"
# only remove messages - there could possibly be other files not starting with capital letter
rm -f "$GENPATH"/[A-Z]*.py
rm -rf "$PB2_OUT"
# move generated files to the destination
# (this assumes $INDEX is *.py, otherwise we'd have to add $INDEX separately)
mv "$TMPDIR"/*.py "$GENPATH"
# the exit trap handles removing the tmp directory