build.sh

#!/bin/sh

#set variables to emulate running in the workflow/pipeline
GIT_REPOSITORY=$(basename `git rev-parse --show-toplevel`)
GIT_BRANCH=$(git branch --show-current)
GIT_COMMIT=$(git rev-parse HEAD)
GIT_TAG="latest-dev"
GITHUB_WORKFLOW="n/a"
GITHUB_RUN_ID=0
GITHUB_RUN_NUMBER=0
IMAGE_NAME="$GIT_REPOSITORY:$GIT_TAG"
#Note: you cannot export a buildx container image into a local docker instance with multiple architecture manifests so for local testing you have to select just a single architecture.
#$PLATFORM="linux/amd64,linux/arm64,linux/arm/v7"
PLATFORM="linux/amd64"

#Create a new builder instance
#https://github.com/docker/buildx/blob/master/docs/reference/buildx_create.md
docker buildx create --name multiarchcontainerrust --use

#Start a build
#https://github.com/docker/buildx/blob/master/docs/reference/buildx_build.md
docker buildx build \
    -t $IMAGE_NAME \
    --label "GITHUB_RUN_ID=$GITHUB_RUN_ID" \
    --label "IMAGE_NAME=$IMAGE_NAME" \
    --build-arg GIT_REPOSITORY=$GIT_REPOSITORY \
    --build-arg GIT_BRANCH=$GIT_BRANCH \
    --build-arg GIT_COMMIT=$GIT_COMMIT \
    --build-arg GIT_TAG=$GIT_TAG \
    --build-arg GITHUB_WORKFLOW=$GITHUB_WORKFLOW \
    --build-arg GITHUB_RUN_ID=$GITHUB_RUN_ID \
    --build-arg GITHUB_RUN_NUMBER=$GITHUB_RUN_NUMBER \
    --platform $PLATFORM \
    --pull \
    -o type=docker \
    .

#Preview matching images
#https://docs.docker.com/engine/reference/commandline/images/
docker images $GIT_REPOSITORY

read -p "Hit ENTER to run the '$IMAGE_NAME' image..."

#Run the multi-architecture container image
#https://docs.docker.com/engine/reference/commandline/run/
docker run --rm -it --name $GIT_REPOSITORY $IMAGE_NAME

#userprofile=$(wslpath "$(wslvar USERPROFILE)")
#export KUBECONFIG=$userprofile/.kube/config
#kubectl run -i --tty --attach multi-arch-container-rust --image=gcr.io/f2calv/multi-arch-container-rust --image-pull-policy='Always'