Add build-docker action

1 files changed, 76 insertions, 0 deletions

diff --git a/lib/actions/build-docker.bash b/lib/actions/build-docker.bash
new file mode 100644
index 0000000..f7f6241
--- /dev/null
+++ b/lib/actions/build-docker.bash
@@ -0,0 +1,76 @@
+#!/usr/bin/bash
+
+action() {
+	local OPTIND
+	local base_image
+	local base_tag
+	local output_tag
+	local dockerfile
+	local template
+	local install_options
+
+	while getopts ":B:b:f:T:t:" opt
+	do
+		case "$opt" in
+			b) RSTAR_BACKEND=$OPTARG ;;
+			B) base_image=$OPTARG ;;
+			T) base_tag=$OPTARG ;;
+			t) output_tag=$OPTARG ;;
+			f) template=$OPTARG ;;
+			*) emerg "Invalid option specified: $opt" ;;
+		esac
+	done
+
+	# Base image must be specified
+	if [[ -z $base_image ]]
+	then
+		emerg "Must specify a base image with -B"
+		exit 2
+	fi
+
+	# Tag of base image defaults to 'latest'
+	[[ -z $base_tag ]] && base_tag="latest"
+
+	# Set a default tag for the built image with relevant information
+	if [[ -z "$output_tag" ]]
+	then
+		output_tag="rakudo:$base_image-$base_tag"
+		if [[ ! -z $RSTAR_BACKEND ]]
+		then
+			output_tag="$output_tag-$RSTAR_BACKEND"
+		fi
+	fi
+
+	dockerfile=$(tempfile)
+
+	# We use the Dockerfile template for this image + tag pair if it exists,
+	# or use the image default template
+	if [[ -z $template ]] && [[ -f "$BASEDIR/lib/docker/$base_image/$base_tag" ]]
+	then
+		template="$BASEDIR/lib/docker/$base_image/$base_tag"
+	else
+		if [[ -f "$BASEDIR/lib/docker/$base_image" ]]
+		then
+			template="$BASEDIR/lib/docker/$base_image"
+		else
+			# Die if we have not found a template to use
+			emerg "No Dockerfile template found for '$base_image:$base_tag'!"
+			exit 2
+		fi
+	fi
+
+	# Fill in template placeholders
+	if [[ ! -z $RSTAR_BACKEND ]]
+	then
+		install_options="$install_options -b "'"'"$RSTAR_BACKEND"'"'
+	fi
+
+	sed < "$template" > "$dockerfile" \
+		-e "s/{{INSTALL_OPTIONS}}/$install_options/" \
+		-e "s/{{TAG}}/$base_tag/"
+
+	# Build the image with the generated Dockerfile
+	docker build -t "$output_tag" -f "$dockerfile" "$BASEDIR"
+
+	shift $(( OPTIND -1 ))
+}