Copy magician dependencies to the container image (GoogleCloudPlatfor…

…m#9299)

Co-authored-by: Thomas Rodgers <[email protected]>

.ci/containers/go-plus/Dockerfile

@@ -1,5 +1,25 @@
-from golang:1.19-bullseye as resource
+# Stage 1: Download go module cache for builds
+FROM golang:1.19-bullseye AS builder
+ENV GOCACHE=/go/cache
+
+RUN apt-get update && apt-get install -y unzip
+WORKDIR /app1
+# Add the source code and build
+ADD "https://github.com/GoogleCloudPlatform/magic-modules/archive/refs/heads/main.zip" source.zip
+RUN unzip source.zip && rm source.zip
+WORKDIR /app1/magic-modules-main/.ci/magician
+# Build the binary (we won't use it in the final image, but it's cached)
+RUN go build -o /dev/null .
+
+# Stage 2: Creating the final image
+FROM golang:1.19-bullseye
 SHELL ["/bin/bash", "-c"]
+ENV GOCACHE=/go/cache
+
+# Copy Go dependencies and Go build cache
+COPY --from=builder /go/pkg/mod /go/pkg/mod
+COPY --from=builder /go/cache /go/cache
+
 # Set up Github SSH cloning.
 RUN ssh-keyscan github.com >> /known_hosts
 RUN echo "UserKnownHostsFile /known_hosts" >> /etc/ssh/ssh_config

.ci/scripts/go-plus/magician/exec.sh

@@ -1,20 +1,28 @@
 #!/bin/bash
 
-# Check if there's at least one argument
-if [ "$#" -eq 0 ]; then
-    echo "No arguments provided"
-    exit 1
-fi
-
 # Get the directory of the current script
 DIR="$(dirname $(realpath $0))"
 
-# Construct the path to the Go program
-GO_PROGRAM="$DIR/../../../magician/"
+# Construct the path to the Go program directory and binary
+GO_PROGRAM_DIR="$DIR/../../../magician/"
+GO_BINARY="$GO_PROGRAM_DIR/magician_binary"
 
-pushd $GO_PROGRAM
+pushd $GO_PROGRAM_DIR
 
 set -x
-# Pass all arguments to the child command
-go run . "$@"
+# Check if the binary exists
+if [ ! -f "$GO_BINARY" ]; then
+    # If it doesn't exist, compile the binary
+    echo "Building the magician binary at $GO_BINARY"
+    go build -o "$GO_BINARY"
+fi
+
+# If there are no arguments only compile the binary
+if [ "$#" -eq 0 ]; then
+    echo "No arguments provided"
+    exit 0
+fi
+
+# Run the binary and pass all arguments
+$GO_BINARY "$@"
 set +x