Build and use binaries from vendor but do not install in GOPATH (isti…

…o#2377)

Automatic merge from submit-queue.

Build and use binaries from vendor but do not install in GOPATH

Builds from vendor, moves to `bin/`, gitignores those artifacts.

.gitignore

@@ -24,3 +24,6 @@ lintconfig.gen.json
 # dep
 Gopkg.lock
 .istiorc
+# codegen stuff
+bin/protoc-gen-gogoslick*
+bin/protoc-min-version*

bin/mixer_codegen.sh

@@ -4,11 +4,18 @@ WD=$(dirname $0)
 WD=$(cd $WD; pwd)
 ROOT=$(dirname $WD)
 
+if [ ! -e $ROOT/Gopkg.lock ]; then
+  echo "Please run 'dep ensure' first"
+  exit 1
+fi
+
+GOGO_VERSION=$(grep -A 4 "gogo/protobuf" $ROOT/Gopkg.lock | grep version | sed -e 's/^[^\"]*\"//g' -e 's/\"//g')
+
 set -e
 
 outdir=$ROOT
 file=$ROOT
-protoc="protoc-min-version -version=3.5.0"
+protoc="$ROOT/bin/protoc-min-version-$GOGO_VERSION -version=3.5.0"
 optimport=$ROOT
 
 while getopts 'f:o:p:i:' flag; do
@@ -29,18 +36,25 @@ if [ $ROOT != "${GOPATH-$HOME/go}/src/istio.io/istio" ]; then
        exit 1
 fi
 
-if [ ! -e $GOPATH/bin/protoc-gen-gogoslick ]; then
-echo "Installing protoc-gen-gogoslick..."
+GOGOPROTO_PATH=vendor/github.com/gogo/protobuf
+GOGOSLICK=protoc-gen-gogoslick
+GOGOSLICK_PATH=$ROOT/$GOGOPROTO_PATH/$GOGOSLICK
+
+if [ ! -e $ROOT/bin/$GOGOSLICK-$GOGO_VERSION ]; then
+echo "Building protoc-gen-gogoslick..."
 pushd $ROOT
-go install "./vendor/github.com/gogo/protobuf/protoc-gen-gogoslick"
+go build --pkgdir $GOGOSLICK_PATH -o $ROOT/bin/$GOGOSLICK-$GOGO_VERSION ./$GOGOPROTO_PATH/$GOGOSLICK
 popd
 echo "Done."
 fi
 
-if [ ! -e $GOPATH/bin/protoc-min-version ]; then
-echo "Installing protoc-min-version..."
+PROTOC_MIN_VERSION=protoc-min-version
+MIN_VERSION_PATH=$ROOT/$GOGOPROTO_PATH/$PROTOC_MIN_VERSION
+
+if [ ! -e $ROOT/bin/$PROTOC_MIN_VERSION-$GOGO_VERSION ]; then
+echo "Building protoc-min-version..."
 pushd $ROOT
-go install "./vendor/github.com/gogo/protobuf/protoc-min-version"
+go build --pkgdir $MIN_VERSION_PATH -o $ROOT/bin/$PROTOC_MIN_VERSION-$GOGO_VERSION ./$GOGOPROTO_PATH/$PROTOC_MIN_VERSION
 popd
 echo "Done."
 fi
@@ -94,7 +108,7 @@ do
 done
 
 
-PLUGIN="--gogoslick_out=$MAPPINGS:"
+PLUGIN="--plugin=$ROOT/bin/protoc-gen-gogoslick-$GOGO_VERSION --gogoslick_out=$MAPPINGS:"
 PLUGIN+=$outdir
 
 # echo $protoc $IMPORTS $PLUGIN $file