update.sh

#!/bin/bash

###
# Updates the AWS CloudFormation Resource Specification using the files published on the AWS Documentaiton.
# See: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cfn-resource-specification.html
###

set -euo pipefail
scriptdir=$(cd $(dirname $0) && pwd)

rm -f CHANGELOG.md.new

function update-spec() {
    local title=$1
    local url=$2
    local targetdir=$3
    local gunzip=$4
    local split=$5

    local tmpdir="$(mktemp -d)"
    local newspec="${tmpdir}/new_proposed.json"
    local newcombined="${tmpdir}/new.json"
    local oldcombined="${tmpdir}/old.json"

    # fail if the spec has changes, otherwise we won't be able to determine the diff
    if [ -n "$(git status --porcelain ${targetdir})" ]; then
        echo "The directory ${targetdir} has changes, revert them before cfn-update"
        exit 1
    fi

    echo >&2 "Downloading from ${url}..."
    if ${gunzip}; then
        curl -sL "${url}" | gunzip - > ${newspec}
    else
        curl -sL "${url}" > ${newspec}
    fi

    # Calculate the old and new combined specs, so we can do a diff on the changes
    echo >&2 "Updating source spec..."

    node build-tools/patch-set.js --quiet "${targetdir}" "${oldcombined}"
    if ${split}; then
        node build-tools/split-spec-by-service.js "${newspec}" "${targetdir}"
    else
        cp "${newspec}" "${targetdir}/spec.json"
        sort-json "${targetdir}/spec.json"
    fi
    node build-tools/patch-set.js --quiet "${targetdir}" "${newcombined}"

    echo >&2 "Updating CHANGELOG.md..."
    node build-tools/spec-diff.js "${title}" "${oldcombined}" "${newcombined}" >> CHANGELOG.md.new

    echo "" >> CHANGELOG.md.new
}

# First run a build to get a complete version of the old spec

update-spec \
    "CloudFormation Resource Specification" \
    "https://d1uauaxba7bl26.cloudfront.net/latest/gzip/CloudFormationResourceSpecification.json" \
    spec-source/specification/000_cfn/000_official \
    true true

old_version=$(cat cfn.version)
new_version=$(node -p "require('${scriptdir}/../spec-source/specification/000_cfn/000_official/001_Version.json').ResourceSpecificationVersion")
echo >&2 "Recording new version..."
rm -f cfn.version
echo "$new_version" > cfn.version

# Only report outdated specs if we made changes, otherwise we're stuck reporting changes every time.
if [[ "$new_version" != "$old_version" ]]; then
    echo >&2 "Reporting outdated specs..."
    node build-tools/report-issues spec-source/specification/000_cfn/000_official/ outdated >> CHANGELOG.md.new
fi

update-spec \
    "Serverless Application Model (SAM) Resource Specification" \
    "https://raw.githubusercontent.com/awslabs/goformation/master/generate/sam-2016-10-31.json" \
    spec-source/specification/100_sam/000_official \
    false false

npm run build

echo >&2 "Creating missing AWS construct libraries for new resource types..."
node ${scriptdir}/create-missing-libraries.js || {
    echo "------------------------------------------------------------------------------------"
    echo "cfn-spec update script failed when trying to create modules for new services"
    echo "Fix the error (you will likely need to add RefKind patches), and then run 'npm run update' again"
    exit 1
}

# update monocdk dep list
(cd ${scriptdir}/../../../monocdk && yarn gen || true)

# append old changelog after new and replace as the last step because otherwise we will not be idempotent
_changelog_contents=$(cat CHANGELOG.md.new)
if [ -n "${_changelog_contents}" ]; then
    cat CHANGELOG.md >> CHANGELOG.md.new
    cp CHANGELOG.md.new CHANGELOG.md
fi