install protoc

.github/workflows/build.yml

@@ -14,8 +14,12 @@ jobs:
         go-version: 1.19
     - name: Fetch dependencies
       run: go mod download -x
+    - name: Setup protoc
+        env:
+          PROTOBUF_VERSION: ${{ matrix.protobuf_version }}
+        run: ./install-protoc.sh
     - name: Install tools
-      run: go install -x github.com/goccmack/gocc github.com/awalterschulze/goderive github.com/gogo/protobuf
+      run: go install -x github.com/goccmack/gocc github.com/awalterschulze/goderive github.com/gogo/protobuf/protoc-gen-gogo
     - name: Generate
       run: make regenerate
     - name: Build

install_protoc.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+set -ex
+
+die() {
+    echo "$@" >&2
+    exit 1
+}
+
+cd ${HOME}
+
+case "$PROTOBUF_VERSION" in
+2*)
+    basename=protobuf-$PROTOBUF_VERSION
+    wget https://github.com/google/protobuf/releases/download/v$PROTOBUF_VERSION/$basename.tar.gz
+    tar xzf $basename.tar.gz
+    cd protobuf-$PROTOBUF_VERSION
+    ./configure --prefix=${HOME} && make -j2 && make install
+    ;;
+3*)
+    basename=protoc-$PROTOBUF_VERSION-linux-x86_64
+    wget https://github.com/google/protobuf/releases/download/v$PROTOBUF_VERSION/$basename.zip
+    unzip $basename.zip
+    ;;
+*)
+    die "unknown protobuf version: $PROTOBUF_VERSION"
+    ;;
+esac