Add ability to build Docker image with prebuilt binary from GH Releases + Pass PREBUILT_TAG in GH Action workflow

Author: valeriansaliou

.github/workflows/build.yml

@@ -9,6 +9,9 @@ jobs:
   build-releases:
     runs-on: ubuntu-latest
 
+    outputs:
+      tag: ${{ steps.current_tag.outputs.tag }}
+
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
@@ -77,6 +80,7 @@ jobs:
           token: ${{ secrets.PACKAGECLOUD_TOKEN }}
 
   build-docker:
+    needs: build-releases
     runs-on: ubuntu-latest
 
     steps:
@@ -108,6 +112,8 @@ jobs:
           tags: ${{ steps.metadata.outputs.tags }}
           labels: ${{ steps.metadata.outputs.labels }}
           push: true
+          build-args: |
+            PREBUILT_TAG=${{ needs.build-releases.outputs.tag }}
           platforms: |
             linux/amd64
             linux/arm64

Dockerfile

@@ -1,31 +1,44 @@
 FROM rust:latest AS build
 
+ARG PREBUILT_TAG
 ARG TARGETPLATFORM
 
+ENV PREBUILT_TAG=$PREBUILT_TAG
+
 WORKDIR /app
 COPY . /app
 
 RUN case ${TARGETPLATFORM} in \
-    "linux/amd64")  echo "x86_64-unknown-linux-musl" > .toolchain ;; \
-    "linux/arm64")  echo "aarch64-unknown-linux-musl" > .toolchain ;; \
+    "linux/amd64")  echo "x86_64" > .arch && echo "x86_64-unknown-linux-musl" > .toolchain ;; \
+    "linux/arm64")  echo "aarch64" > .arch && echo "aarch64-unknown-linux-musl" > .toolchain ;; \
     *)              echo "Unsupported platform: $TARGETPLATFORM" && exit 1 ;; \
     esac
 
-RUN apt-get update
-RUN apt-get install -y musl-tools
-
-RUN rustup target add $(cat .toolchain)
-
-RUN cargo build --release --target $(cat .toolchain)
-RUN mv ./target/$(cat .toolchain)/release/vigil ./
+# Run full build?
+RUN if [ -z "$PREBUILT_TAG" ]; then \
+    apt-get update && \
+        apt-get install -y musl-tools && \
+        rustup target add $(cat .toolchain) \
+    ; fi
+RUN if [ -z "$PREBUILT_TAG" ]; then \
+    cargo build --release --target $(cat .toolchain) && \
+        mkdir -p ./vigil/ && \
+        mv ./target/$(cat .toolchain)/release/vigil ./vigil/ \
+    ; fi
+
+# Pull pre-built binary?
+RUN if [ ! -z "$PREBUILT_TAG" ]; then \
+    wget https://github.com/valeriansaliou/vigil/releases/download/$PREBUILT_TAG/$PREBUILT_TAG-$(cat .arch).tar.gz && \
+        tar -xzf $PREBUILT_TAG-$(cat .arch).tar.gz \
+    ; fi
 
 FROM alpine:latest
 
 WORKDIR /usr/src/vigil
 
-COPY ./res/assets/ ./res/assets/
 COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
-COPY --from=build /app/vigil /usr/local/bin/vigil
+COPY --from=build /app/vigil/vigil /usr/local/bin/vigil
+COPY --from=build /app/vigil/res/assets/ ./res/assets/
 
 CMD [ "vigil", "-c", "/etc/vigil.cfg" ]