Build controller without CGO

Signed-off-by: Stefan Prodan <[email protected]>

Author: stefanprodan

Dockerfile

@@ -1,30 +1,16 @@
-ARG BASE_VARIANT=alpine
 ARG GO_VERSION=1.23
 ARG XX_VERSION=1.6.1
 
 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
+# Docker buildkit multi-arch build requires golang alpine
+FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine AS builder
 
+# Copy the build utilities.
 COPY --from=xx / /
 
-# build-go-mod can still be cached at build platform architecture.
-FROM build-base AS build
-
 ARG TARGETPLATFORM
 
-# Some dependencies have to installed 
-# for the target platform: https://github.com/tonistiigi/xx#go--cgo
-RUN xx-apk add musl-dev gcc clang lld
-
 # Configure workspace
 WORKDIR /workspace
 
@@ -46,28 +32,17 @@ COPY internal/ internal/
 ARG TARGETPLATFORM
 ARG TARGETARCH
 
-# Reasons why CGO is in use:
-# - The SHA1 implementation (sha1cd) used by go-git depends on CGO for
-#   performance reasons. See: https://github.com/pjbgf/sha1cd/issues/15
-ENV CGO_ENABLED=1
-
-RUN export CGO_LDFLAGS="-static -fuse-ld=lld" && \
-  xx-go build \
-  -ldflags "-s -w" \
-  -tags 'netgo,osusergo,static_build' \
-  -o /source-controller -trimpath main.go;
-
-# Ensure that the binary was cross-compiled correctly to the target platform.
-RUN xx-verify --static /source-controller
+# build without specifing the arch
+ENV CGO_ENABLED=0
+RUN xx-go build -trimpath -a -o source-controller main.go
 
 FROM alpine:3.21
 
 ARG TARGETPLATFORM
 RUN apk --no-cache add ca-certificates \
   && update-ca-certificates
 
-# Copy over binary from build
-COPY --from=build /source-controller /usr/local/bin/
+COPY --from=builder /workspace/source-controller /usr/local/bin/
 
 USER 65534:65534
 ENTRYPOINT [ "source-controller" ]