deploy.sh.template

#!/bin/bash

# Function to display usage
function usage() {
    cat <<EOF
Usage: $0 [options]
Uploads the Angular site to AWS S3.

Options:
  -h, --help            Show this message and exit.
  -d, --delete-first    Remove specific contents in the target bucket before syncing.
  -s, --sync            Sync the local directory to the S3 bucket.
EOF
}

# AWS CloudFront Distribution ID
DISTID=""

# Check for necessary commands
if ! command -v ng &>/dev/null || ! command -v aws &>/dev/null; then
    echo "Error: This script requires both 'ng' and 'aws' commands to be available."
    exit 1
fi

# Default action is to show usage if no arguments are passed
if [ $# -eq 0 ]; then
    usage
    exit 1
fi

# Function to determine content type based on file extension
get_mime_type() {
    local filename="$1"
    local extension="${filename##*.}"  # Get everything after the last dot
    case "$extension" in
        js)
            echo "application/javascript"
            ;;
        css)
            echo "text/css"
            ;;
        html)
            echo "text/html"
            ;;
        json)
            echo "application/json"
            ;;
        wasm)
            # If your Angular app uses WebAssembly, set application/wasm
            echo "application/wasm"  # [2]
            ;;
        map)
            echo "application/json"
            ;;
        *)
            # Fallback to auto-detection via the 'file' command
            file --mime-type -b "./dist/$filename"
            ;;
    esac
}

# Function to perform sync
sync_to_s3() {
    echo "Building Angular project..."
    ng build --configuration production || {
        echo "Build failed"
        exit 1
    }

    echo "Checking for changed files..."
    local local_files_checksum="./local_files_checksum.txt"
    local s3_files_metadata="./s3_files_metadata.txt"

    # Generate list of local files and their checksums
    find ./dist -type f -exec md5sum {} + | sed 's|./dist/||' | sort >"$local_files_checksum"

    # Get list of existing files in S3 and their checksums
    aws s3api list-objects \
        --bucket junipertcy.info \
        --query "Contents[].{Key: Key, ETag: ETag}" \
        --output text \
        | awk '{print $1 "  " $2}' \
        | sed 's/"//g' \
        | sort > "$s3_files_metadata"

    # Sync files that differ by MD5 or don’t exist in S3
    while IFS= read -r line; do
        local md5=$(echo "$line" | awk '{print $1}')
        local file_path=$(echo "$line" | awk '{print $2}')
        local s3_md5=$(grep "$file_path" "$s3_files_metadata" | awk '{print $1}')
        
        if [[ "$md5" != "$s3_md5" ]]; then
            echo "MD5 mismatch or new file - Syncing file: $file_path: local=$md5 vs s3=$s3_md5"
            metadata=$(aws s3api head-object \
                --bucket junipertcy.info \
                --key "$file_path" \
                --query Metadata.md5checksum \
                --output text \
                --profile default 2>/dev/null)

            if [[ "$md5" != "$metadata" ]]; then
                mime_type=$(get_mime_type "$file_path")
                aws s3 cp "./dist/$file_path" "s3://junipertcy.info/$file_path" \
                    --acl public-read \
                    --metadata md5checksum=$md5 \
                    --content-type "$mime_type" \
                    --profile default \
                    || echo "Failed to sync $file_path"
            else
                echo "Yet, metadata match - No need to sync: $file_path"
            fi
        fi
    done <"$local_files_checksum"

    # Invalidate CloudFront cache
    echo "Invalidating CloudFront distribution..."
    aws cloudfront create-invalidation \
        --distribution-id $DISTID \
        --paths "/*" \
        --profile default \
        || echo "Failed to invalidate CloudFront distribution"

    # Cleanup
    echo "Cleaning up temporary files..."
    rm -f "$local_files_checksum" "$s3_files_metadata"
    echo "Sync completed."
}

# Parse options
while getopts ":hds" option; do
    case "${option}" in
    h)
        usage
        exit 0
        ;;
    d)
        # Remove specific contents before syncing
        aws s3 rm s3://junipertcy.info --recursive \
            --exclude "*" \
            --include "*.js" \
            --include "*.css" \
            --include "*.eot" \
            --include "*.woff" \
            --include "*.woff2" \
            --profile default
        sync_to_s3
        exit 0
        ;;
    s)
        sync_to_s3
        exit 0
        ;;
    *)
        usage
        exit 1
        ;;
    esac
done

# Shift off the options
shift $((OPTIND - 1))

# If no options were passed, show usage
if [ $# -eq 0 ]; then
    usage
    exit 1
fi