deploy.sh

#!/usr/bin/env bash

# Environment variables:
#
# REPOSITORY_URI (Optional)

echo "[INFO] $0 started at `date`"

image_name=shib-proxy
return=0

# Get the commit hash
read -r commit_hash<<<$(git rev-parse --short HEAD)
echo "[INFO] Commit hash: \"$commit_hash\""

# Get the image's version label
read -r version<<<$(docker inspect --format='{{.Config.Labels.version}}' $image_name:$commit_hash)
if [ -z "$version" ]; then
    echo "[ERROR] Unable to inspect version label for image $image_name:$commit_hash"
    exit 1
fi
echo "[INFO] Version: \"$version\""
read -r major minor patch<<<$(echo $version | tr . ' ')
echo "[DEBUG] major.minor.patch=\"$major.$minor.$patch\""
local_image="$image_name:$commit_hash"
echo "[DEBUG] local_image=\"$local_image\""

# If no ECR hostname is set, default to using Docker Hub
if [ -z "$REPOSITORY_URI" ]; then
    remote_image_uri="${image_name}"
else
    remote_image_uri="${REPOSITORY_URI}/${image_name}"
fi
echo "[DEBUG] image_uri=\"$remote_image_uri\""

# Determine tags
tags=(
    "latest"
    "$major.$minor.$patch"
    "$major.$minor"
    "$major"
)
echo "[DEBUG] tags=\"${tags[*]}\""

# Tag the image
echo "[INFO] Tagging the container image"
for tag in ${tags[@]}; do
    cmd="docker tag $local_image $remote_image_uri:$tag"
    echo "[DEBUG] cmd=\"$cmd\""
    $cmd
    rc=$?
    if [ $rc -ne 0 ]; then
        echo "[ERROR] Tagging failed (exit code $rc)"
        return=1
        break
    fi
done

# Push the image to the registry
echo "[INFO] Pushing the image to the registry"
for tag in ${tags[@]}; do
    cmd="docker push $remote_image_uri:$tag"
    echo "[DEBUG] cmd=\"$cmd\""
    $cmd
    rc=$?
    if [ $rc -ne 0 ]; then
        echo "[ERROR] Push failed (exit code $rc)"
        return=1
        break
    fi
done

echo "[INFO] $0 finished at `date`"
exit $return