#!/usr/bin/env bash

 set -e

 # This script looks for bundles built by make.sh, and releases them on a
 # public S3 bucket.

 #
 # Bundles should be available for the VERSION string passed as argument.
 #

 # The correct way to call this script is inside a container built by the
 # official Dockerfile at the root of the Docker source code. The Dockerfile,
 # make.sh and release.sh should all be from the same source code revision.

 set -o pipefail

 
 # Print a usage message and exit.
 usage() {

 	cat >&2 <<'EOF'

 To run, I need:
 - to be in a container generated by the Dockerfile at the top of the Docker
   repository;

 - to be provided with the location of an S3 bucket and path, in
   environment variables AWS_S3_BUCKET and AWS_S3_BUCKET_PATH (default: '');

 - to be provided with AWS credentials for this S3 bucket, in environment

   variables AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY;

 - a generous amount of good will and nice manners.
 The canonical way to run me is to run the image produced by the Dockerfile: e.g.:"
 

 docker run -e AWS_S3_BUCKET=test.docker.com \

            -e AWS_ACCESS_KEY_ID     \
            -e AWS_SECRET_ACCESS_KEY \
            -e AWS_DEFAULT_REGION    \
            -it --privileged         \

            docker ./hack/release.sh

 EOF

 	exit 1
 }
 

 [ "$AWS_S3_BUCKET" ] || usage

 [ "$AWS_ACCESS_KEY_ID" ] || usage
 [ "$AWS_SECRET_ACCESS_KEY" ] || usage

 [ -d /go/src/github.com/docker/docker ] || usage
 cd /go/src/github.com/docker/docker

 [ -x hack/make.sh ] || usage
 

 export AWS_DEFAULT_REGION

 : ${AWS_DEFAULT_REGION:=us-west-1}

 RELEASE_BUNDLES=(
 	binary

 	cross

 	tgz

 )
 
 if [ "$1" != '--release-regardless-of-test-failure' ]; then

 	RELEASE_BUNDLES=(

 		test-unit

 		"${RELEASE_BUNDLES[@]}"
 		test-integration-cli
 	)

 fi

 VERSION=$(< VERSION)

 BUCKET=$AWS_S3_BUCKET

 BUCKET_PATH=$BUCKET
 [[ -n "$AWS_S3_BUCKET_PATH" ]] && BUCKET_PATH+=/$AWS_S3_BUCKET_PATH

 if command -v git &> /dev/null && git rev-parse &> /dev/null; then
 	if [ -n "$(git status --porcelain --untracked-files=no)" ]; then
 		echo "You cannot run the release script on a repo with uncommitted changes"
 		usage
 	fi
 fi
 

 # These are the 2 keys we've used to sign the deb's

 #   release (get.docker.com)

 #	GPG_KEY="36A1D7869245C8950F966E92D8576A8BA88D21E9"

 #   test    (test.docker.com)

 #	GPG_KEY="740B314AE3941731B942C66ADF4FD13717AAD7D6"
 

 setup_s3() {

 	echo "Setting up S3"

 	# Try creating the bucket. Ignore errors (it might already exist).

 	aws s3 mb "s3://$BUCKET" 2>/dev/null || true

 	# Check access to the bucket.

 	aws s3 ls "s3://$BUCKET" >/dev/null

 	# Make the bucket accessible through website endpoints.

 	aws s3 website --index-document index --error-document error "s3://$BUCKET"

 }
 
 # write_to_s3 uploads the contents of standard input to the specified S3 url.
 write_to_s3() {
 	DEST=$1
 	F=`mktemp`

 	cat > "$F"

 	aws s3 cp --acl public-read --content-type 'text/plain' "$F" "$DEST"

 	rm -f "$F"

 }
 
 s3_url() {

 	case "$BUCKET" in

 		get.docker.com|test.docker.com|experimental.docker.com)

 			echo "https://$BUCKET_PATH"

 			;;
 		*)

 			BASE_URL="http://${BUCKET}.s3-website-${AWS_DEFAULT_REGION}.amazonaws.com"

 			if [[ -n "$AWS_S3_BUCKET_PATH" ]] ; then
 				echo "$BASE_URL/$AWS_S3_BUCKET_PATH"
 			else
 				echo "$BASE_URL"
 			fi

 			;;
 	esac

 }
 

 build_all() {

 	echo "Building release"

 	if ! ./hack/make.sh "${RELEASE_BUNDLES[@]}"; then
 		echo >&2
 		echo >&2 'The build or tests appear to have failed.'
 		echo >&2
 		echo >&2 'You, as the release  maintainer, now have a couple options:'
 		echo >&2 '- delay release and fix issues'
 		echo >&2 '- delay release and fix issues'
 		echo >&2 '- did we mention how important this is?  issues need fixing :)'
 		echo >&2
 		echo >&2 'As a final LAST RESORT, you (because only you, the release maintainer,'
 		echo >&2 ' really knows all the hairy problems at hand with the current release'
 		echo >&2 ' issues) may bypass this checking by running this script again with the'
 		echo >&2 ' single argument of "--release-regardless-of-test-failure", which will skip'
 		echo >&2 ' running the test suite, and will only build the binaries and packages.  Please'
 		echo >&2 ' avoid using this if at all possible.'
 		echo >&2
 		echo >&2 'Regardless, we cannot stress enough the scarcity with which this bypass'
 		echo >&2 ' should be used.  If there are release issues, we should always err on the'
 		echo >&2 ' side of caution.'
 		echo >&2
 		exit 1
 	fi
 }
 

 upload_release_build() {
 	src="$1"
 	dst="$2"
 	latest="$3"
 
 	echo
 	echo "Uploading $src"
 	echo "  to $dst"
 	echo

 	aws s3 cp --follow-symlinks --acl public-read "$src" "$dst"

 	if [ "$latest" ]; then
 		echo
 		echo "Copying to $latest"
 		echo

 		aws s3 cp --acl public-read "$dst" "$latest"

 	fi
 
 	# get hash files too (see hash_files() in hack/make.sh)
 	for hashAlgo in md5 sha256; do
 		if [ -e "$src.$hashAlgo" ]; then
 			echo
 			echo "Uploading $src.$hashAlgo"
 			echo "  to $dst.$hashAlgo"
 			echo

 			aws s3 cp --follow-symlinks --acl public-read --content-type='text/plain' "$src.$hashAlgo" "$dst.$hashAlgo"

 			if [ "$latest" ]; then
 				echo
 				echo "Copying to $latest.$hashAlgo"
 				echo

 				aws s3 cp --acl public-read "$dst.$hashAlgo" "$latest.$hashAlgo"

 			fi
 		fi
 	done
 }
 

 release_build() {

 	echo "Releasing binaries"

 	GOOS=$1
 	GOARCH=$2
 

 	binDir=bundles/$VERSION/cross/$GOOS/$GOARCH
 	tgzDir=bundles/$VERSION/tgz/$GOOS/$GOARCH
 	binary=docker-$VERSION

 	zipExt=".tgz"
 	binaryExt=""
 	tgz=$binary$zipExt

 
 	latestBase=
 	if [ -z "$NOLATEST" ]; then
 		latestBase=docker-latest
 	fi

 
 	# we need to map our GOOS and GOARCH to uname values
 	# see https://en.wikipedia.org/wiki/Uname
 	# ie, GOOS=linux -> "uname -s"=Linux
 

 	s3Os=$GOOS
 	case "$s3Os" in

 		darwin)

 			s3Os=Darwin

 			;;
 		freebsd)

 			s3Os=FreeBSD

 			;;
 		linux)

 			s3Os=Linux

 			;;

 		windows)

 			# this is windows use the .zip and .exe extentions for the files.

 			s3Os=Windows

 			zipExt=".zip"
 			binaryExt=".exe"
 			tgz=$binary$zipExt
 			binary+=$binaryExt

 			;;

 		*)

 			echo >&2 "error: can't convert $s3Os to an appropriate value for 'uname -s'"

 			exit 1
 			;;
 	esac
 

 	s3Arch=$GOARCH
 	case "$s3Arch" in

 		amd64)

 			s3Arch=x86_64

 			;;
 		386)

 			s3Arch=i386

 			;;
 		arm)

 			s3Arch=armel

 			# someday, we might potentially support multiple GOARM values, in which case we might get armhf here too

 			;;
 		*)

 			echo >&2 "error: can't convert $s3Arch to an appropriate value for 'uname -m'"

 			exit 1
 			;;
 	esac
 

 	s3Dir="s3://$BUCKET_PATH/builds/$s3Os/$s3Arch"

 	# latest=

 	latestTgz=
 	if [ "$latestBase" ]; then

 		# commented out since we aren't uploading binaries right now.
 		# latest="$s3Dir/$latestBase$binaryExt"
 		# we don't include the $binaryExt because we don't want docker.exe.zip
 		latestTgz="$s3Dir/$latestBase$zipExt"

 	fi

 	if [ ! -f "$tgzDir/$tgz" ]; then
 		echo >&2 "error: can't find $tgzDir/$tgz - was it packaged properly?"

 		exit 1
 	fi

 	# disable binary uploads for now. Only providing tgz downloads
 	# upload_release_build "$binDir/$binary" "$s3Dir/$binary" "$latest"

 	upload_release_build "$tgzDir/$tgz" "$s3Dir/$tgz" "$latestTgz"

 }
 
 # Upload binaries and tgz files to S3
 release_binaries() {

 	[ -e "bundles/$VERSION/cross/linux/amd64/docker-$VERSION" ] || {

 		echo >&2 './hack/make.sh must be run before release_binaries'

 		exit 1
 	}
 

 	for d in bundles/$VERSION/cross/*/*; do
 		GOARCH="$(basename "$d")"
 		GOOS="$(basename "$(dirname "$d")")"
 		release_build "$GOOS" "$GOARCH"
 	done

 	# TODO create redirect from builds/*/i686 to builds/*/i386

 	cat <<EOF | write_to_s3 s3://$BUCKET_PATH/builds/index

 # To install, run the following commands as root:
 curl -fsSLO $(s3_url)/builds/Linux/x86_64/docker-$VERSION.tgz && tar --strip-components=1 -xvzf docker-$VERSION.tgz -C /usr/local/bin
 

 # Then start docker in daemon mode:

 /usr/local/bin/dockerd

 EOF

 
 	# Add redirect at /builds/info for URL-backwards-compatibility
 	rm -rf /tmp/emptyfile && touch /tmp/emptyfile

 	aws s3 cp --acl public-read --website-redirect '/builds/' --content-type='text/plain' /tmp/emptyfile "s3://$BUCKET_PATH/builds/info"

 	if [ -z "$NOLATEST" ]; then

 		echo "Advertising $VERSION on $BUCKET_PATH as most recent version"
 		echo "$VERSION" | write_to_s3 "s3://$BUCKET_PATH/latest"

 	fi
 }
 

 # Upload the index script
 release_index() {

 	echo "Releasing index"

 	url="$(s3_url)/" hack/make.sh install-script

 	write_to_s3 "s3://$BUCKET_PATH/index" < "bundles/$VERSION/install-script/install.sh"

 }
 

 main() {

 	build_all

 	setup_s3

 	release_binaries

 	release_index

 }
 
 main

 
 echo
 echo
 echo "Release complete; see $(s3_url)"

 echo "Use the following text to announce the release:"
 echo
 echo "We have just pushed $VERSION to $(s3_url). You can download it with the following:"
 echo
 echo "Linux 64bit tgz: $(s3_url)/builds/Linux/x86_64/docker-$VERSION.tgz"

 echo "Darwin/OSX 64bit client tgz: $(s3_url)/builds/Darwin/x86_64/docker-$VERSION.tgz"
 echo "Windows 64bit zip: $(s3_url)/builds/Windows/x86_64/docker-$VERSION.zip"

 echo "Windows 32bit client zip: $(s3_url)/builds/Windows/i386/docker-$VERSION.zip"

 echo