Upgrade to golang-with-libgit2:1.1.1.6 and use static libraries for in development

.github/workflows/e2e.yaml

@@ -27,6 +27,8 @@ jobs:
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
           restore-keys: |
             ${{ runner.os }}-go-
+      - name: Run tests
+        run: make test
       - name: Setup Kubernetes
         uses: engineerd/setup-kind@v0.5.0
         with:
@@ -36,11 +38,6 @@ jobs:
         uses: fluxcd/pkg/actions/kustomize@main
       - name: Setup Helm
         uses: fluxcd/pkg/actions/helm@main
-      - name: Run tests
-        uses: ./.github/actions/run-tests
-        env:
-          GOROOT:
-          GOPATH: /github/home/go
       - name: Verify
         run: make verify
       - name: Run E2E tests
@@ -59,6 +56,12 @@ jobs:
         uses: actions/setup-go@v2
         with:
           go-version: 1.17.x
+      - name: Run tests
+        run: |
+          mkdir tmp-download; cd tmp-download; go mod init go-download;
+          GOBIN="${GITHUB_WORKSPACE}/build/gobin" go install sigs.k8s.io/controller-runtime/tools/setup-envtest@latest
+          cd ..; rm -rf tmp-download
+          make test
       - name: Prepare
         id: prep
         run: |
@@ -80,3 +83,24 @@ jobs:
         run: |
           kind delete cluster --name ${{ steps.prep.outputs.CLUSTER }}
           rm /tmp/${{ steps.prep.outputs.CLUSTER }}
+
+  # Runs 'make test' on macos-10.15 to assure development environment for 
+  # contributors using MacOS.
+  darwin-amd64:
+    runs-on: macos-10.15
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Setup Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.17.x
+      - name: Restore Go cache
+        uses: actions/cache@v1
+        with:
+          path: /home/runner/work/_temp/_github_home/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+      - name: Run tests
+        run: make test

.gitignore

@@ -17,8 +17,5 @@ bin/
 testbin/
 config/release/
 
-# Exclude all libgit2 related files
-hack/libgit2/
-
 # Exclude temporary build files
 build/

Dockerfile

@@ -2,14 +2,27 @@ ARG BASE_VARIANT=alpine
 ARG GO_VERSION=1.17
 ARG XX_VERSION=1.1.0
 
-ARG LIBGIT2_IMG=ghcr.io/fluxcd/golang-with-libgit2
-ARG LIBGIT2_TAG=libgit2-1.1.1-4
+ARG LIBGIT2_IMG
+ARG LIBGIT2_TAG
 
-FROM --platform=linux/amd64 ${LIBGIT2_IMG}:${LIBGIT2_TAG} as build-amd64
-FROM --platform=linux/arm64 ${LIBGIT2_IMG}:${LIBGIT2_TAG} as build-arm64
-FROM --platform=linux/arm/v7 ${LIBGIT2_IMG}:${LIBGIT2_TAG} as build-armv7
+FROM ${LIBGIT2_IMG}:${LIBGIT2_TAG} AS libgit2-libs
 
-FROM --platform=$BUILDPLATFORM build-$TARGETARCH$TARGETVARIANT AS build
+FROM --platform=$BUILDPLATFORM tonistiigi/xx:${XX_VERSION} AS xx
+
+FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-${BASE_VARIANT} as gostable
+
+FROM gostable AS go-linux
+
+# Build-base consists of build platform dependencies and xx.
+# These will be used at current arch to yield execute the cross compilations.
+FROM go-${TARGETOS} AS build-base
+
+RUN apk add --no-cache clang lld pkgconfig
+
+COPY --from=xx / /
+
+# build-go-mod can still be cached at build platform architecture.
+FROM build-base as build-go-mod
 
 # Configure workspace
 WORKDIR /workspace
@@ -24,26 +37,55 @@ COPY go.sum go.sum
 # Cache modules
 RUN go mod download
 
-RUN apk add clang lld pkgconfig ca-certificates
+# The musl-tool-chain layer is an adhoc solution
+# for the problem in which xx gets confused during compilation
+# and a) looks for gold linker and then b) cannot find musl's dynamic linker.
+FROM --platform=$BUILDPLATFORM alpine as musl-tool-chain
+
+COPY --from=xx / /
+
+RUN apk add bash curl tar
+
+WORKDIR /workspace
+COPY hack/download-musl.sh .
 
-# Build the binary
-ENV CGO_ENABLED=1
 ARG TARGETPLATFORM
+ARG TARGETARCH
+RUN ROOT_DIR="$(pwd)" TARGET_ARCH="$(xx-info alpine-arch)" ENV_FILE=true \
+        ./download-musl.sh
 
-RUN xx-apk add --no-cache \
-        musl-dev gcc lld binutils-gold
+# Build stage install per target platform
+# dependency and effectively cross compile the application.
+FROM build-go-mod as build
+
+ARG TARGETPLATFORM
+
+COPY --from=libgit2-libs /usr/local/ /usr/local/
+
+# Some dependencies have to installed 
+# for the target platform: https://github.com/tonistiigi/xx#go--cgo
+RUN xx-apk add musl-dev gcc lld
+
+WORKDIR /workspace
+
+# Copy source code
+COPY main.go main.go
+COPY controllers/ controllers/
+COPY pkg/ pkg/
+COPY internal/ internal/
+
+COPY --from=musl-tool-chain /workspace/build /workspace/build
+
+ARG TARGETPLATFORM
+ARG TARGETARCH
+ENV CGO_ENABLED=1
 
-# Performance related changes:
-# - Use read-only bind instead of copying go source files.
-# - Cache go packages.
-RUN --mount=target=. \
-    --mount=type=cache,target=/root/.cache/go-build \
-    --mount=type=cache,target=/go/pkg \
-    export LIBRARY_PATH="/usr/local/$(xx-info triple)/lib:/usr/local/$(xx-info triple)/lib64:${LIBRARY_PATH}" && \
+# Instead of using xx-go, (cross) compile with vanilla go leveraging musl tool chain.
+RUN export $(cat build/musl/$(xx-info alpine-arch).env | xargs) && \
+    export LIBRARY_PATH="/usr/local/$(xx-info triple):/usr/local/$(xx-info triple)/lib64" && \
     export PKG_CONFIG_PATH="/usr/local/$(xx-info triple)/lib/pkgconfig:/usr/local/$(xx-info triple)/lib64/pkgconfig" && \
-	export FLAGS="$(pkg-config --static --libs --cflags libssh2 openssl libgit2)" && \
-    CGO_LDFLAGS="${FLAGS} -static" \
-	xx-go build \
+    export CGO_LDFLAGS="$(pkg-config --static --libs --cflags libssh2 openssl libgit2) -static" && \
+    GOARCH=$TARGETARCH go build  \
         -ldflags "-s -w" \
         -tags 'netgo,osusergo,static_build' \
         -o /source-controller -trimpath main.go;