docs: refresh Go example

- `build` action now only build for the local platform
- `build:all` action builds for multi-platform and compress the binaries

Signed-off-by: Yves Brissaud <yves.brissaud@gmail.com>

Author: eunomie

examples/go/Dockerfile

@@ -12,7 +12,7 @@ FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS b
 COPY --from=xx / /
 RUN apk add --no-cache curl
 RUN sh -c "$(curl --location https://taskfile.dev/install.sh)" -- -d -b /usr/local/bin
-RUN apk add --no-cache git ca-certificates openssh-client
+RUN apk add --no-cache git ca-certificates openssh-client zip
 
 FROM build-base AS build
 ARG TARGETPLATFORM
@@ -27,20 +27,35 @@ RUN --mount=type=ssh \
 COPY . ./
 
 FROM build AS binary
-ENV CGO_ENABLED=0
+ARG TARGETOS
+ARG TARGETARCH
 ARG BIN_NAME
+ARG NO_ARCHIVE
+ENV CGO_ENABLED=0
 RUN --mount=type=cache,target=/root/.cache \
     --mount=type=cache,target=/go/pkg/mod \
     GIT_VERSION=$(git describe --tags | cut -c 2-) && \
+    PKG_NAME=$(go mod graph | head -n 1 | cut -d ' ' -f 1) && \
     xx-go build \
       -o dist/${BIN_NAME} \
       -ldflags="-w -s \
-        -X {{.PKG_NAME}}/internal/constants.Version=$GIT_VERSION" \
+        -X $PKG_NAME/internal/constants.Version=$GIT_VERSION" \
       ./cmd/${BIN_NAME} && \
-    xx-verify dist/${BIN_NAME}
+    xx-verify dist/${BIN_NAME} && \
+    if [ -z "${NO_ARCHIVE}" ]; then \
+      # on windows add the .exe extension and zip the binary \
+      if [ "${TARGETOS}" = "windows" ]; then \
+        mv dist/${BIN_NAME} dist/${BIN_NAME}.exe && \
+        (cd dist && zip ${BIN_NAME}-${TARGETOS}-${TARGETARCH}.zip ${BIN_NAME}.exe && rm -f ${BIN_NAME}.exe); \
+      fi && \
+      # if target os is not windows, tar and gzip the binary \
+      if [ "${TARGETOS}" != "windows" ]; then \
+        tar -C dist -czf dist/${BIN_NAME}-${TARGETOS}-${TARGETARCH}.tar.gz ${BIN_NAME} && rm -f dist/${BIN_NAME}; \
+      fi \
+    fi
 
 FROM scratch AS export-bin
 ARG BIN_NAME
 ARG TARGETOS
 ARG TARGETARCH
-COPY --from=binary /go/src/dist/${BIN_NAME} /${BIN_NAME}-${TARGETOS}-${TARGETARCH}
+COPY --from=binary /go/src/dist/* /

examples/go/README.md

@@ -12,7 +12,7 @@ Go packages and cache are shared with `golangci-lint` to speed up the process.
 
 ### Build
 
-`build` action will build the codebase using `docker buildx` and output as (multi-platform) binaries.
+`build` action will build the codebase using `docker buildx` and output as binary.
 
 By convention if the binary name is `tool`, it will try to build `cmd/tool/` and the output will be inside `dist` directory.
 
@@ -26,11 +26,29 @@ images:
       build:
         opts:
           bin_name: <bin name>
-          platforms: <platforms to build against>
 ```
 
 That way you will be able to run `docker runx build` without to specify anything else.
 
+### Multi platform builds
+
+`build:all` allows to create multi-platform builds using `docker buildx`.
+
+The generated binaries will be compressed and stored in the `dist` directory.
+
+To make it more convenient, define the following in `.docker/runx.yaml`:
+
+```yaml
+ref: eunomie/go
+images:
+  eunomie/go:
+    actions:
+      build:all:
+        opts:
+          bin_name: <bin name>
+          platforms: <comma separated list of platforms>
+```
+
 ### Mocks
 
 `mocks` action will generate mocks for the codebase using `mockery`.

examples/go/runx.yaml

@@ -20,6 +20,23 @@ actions:
       golangci-lint run --timeout 5m
 
   - id: build
+    type: build
+    dockerfile: Dockerfile
+    opts:
+      - name: bin_name
+        desc: The name of the binary that also defines the build target as cmd/<bin_name>
+        prompt: Please enter then name of the binary
+        required: true
+    cmd: >
+      -f {{.Dockerfile}}
+      --build-arg BIN_NAME={{opt "bin_name"}}
+      --build-arg NO_ARCHIVE=true
+      --platform local
+      --target export-bin
+      --output type=local,dest=dist/
+      .
+
+  - id: build:all
     type: build
     dockerfile: Dockerfile
     opts:
@@ -35,7 +52,7 @@ actions:
       --build-arg BIN_NAME={{opt "bin_name"}}
       {{if opt "platforms"}}--platform {{opt "platforms"}}{{end}}
       --target export-bin
-      --output type=local,dest=dist/
+      --output type=local,dest=dist/,platform-split=false
       .
 
   - id: mocks