add drone image building support

1 files changed, 34 insertions, 0 deletions

diff --git a/dockerfiles.sh b/dockerfiles.sh
new file mode 100755
index 0000000..b0b2fb7
--- /dev/null
+++ b/dockerfiles.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+
+TEMPLATE="Dockerfile.in"
+RELEASES="v3.6 v3.7 v3.8 v3.9 edge"
+ARCHS="x86 x86_64 armhf armv7 aarch64"
+
+die() {
+	echo "$1" >&2
+	exit 1
+}
+
+arch_to_image() {
+	case $1 in
+		armv7) echo arm32v7 ;;
+		aarch64) echo arm64v8 ;;
+		x86_64) echo amd64 ;;
+		armhf) echo arm32v6 ;;
+		x86) echo i386 ;;
+		*) die "Unknown arch detected: \"$1\""
+	esac
+}
+
+[ -d "Dockerfiles" ] && rm -rf Dockerfiles/*
+
+for REL in $RELEASES; do
+	for ARCH in $ARCHS; do
+		mkdir -p Dockerfiles/$REL/$ARCH
+		cat "$TEMPLATE" |
+			sed -e "s/%%ALPINE_IMG%%/$(arch_to_image $ARCH)/" \
+			-e "s/%%ALPINE_TAG%%/${REL/v/}/" \
+			-e "s/%%ALPINE_REL%%/$REL/" > \
+			Dockerfiles/$REL/$ARCH/Dockerfile
+	done
+done