feat: add version builds

.drone.yml

@@ -2,7 +2,25 @@ pipeline:
         docker:
                 image: plugins/docker
                 repo: docker.jcg.re/caddy
+                build_args:
+                        - BRANCH=tags/${CADDY_VERSION}
                 registry: docker.jcg.re
                 secrets: [ docker_username, docker_password ]
+                tags: ${CADDY_VERSION}
+        docker:
+                image: plugins/docker
+                repo: docker.jcg.re/caddy
+                registry: docker.jcg.re
+                secrets: [docker_username, docker_password ]
                 tags: latest
+                
 
+matrix:
+        CADDY_VERSION:
+                - v0.10.10
+                - v0.10.9
+                - v0.10.8
+                - v0.10.7
+                - v0.10.6
+                - v0.10.5
+                - v0.10.4

Dockerfile

@@ -2,7 +2,7 @@ FROM docker.jcg.re/base-alpine
 MAINTAINER Jan Christian Grünhage <jan.christian@gruenhage.xyz>
 
 ARG CLONE_URL=github.com/mholt/caddy
-ARG BRANCH=tags/v0.10.10
+ARG BRANCH
 
 ENV GOPATH=/gopath \
     UID=192 \
@@ -21,7 +21,7 @@ RUN apk upgrade --update \
  && mkdir -p ${GOPATH}/src/${CLONE_URL} \
  && cd $GOPATH/src/${CLONE_URL} \
  && git clone https://${CLONE_URL} . \
- && git checkout ${BRANCH} \
+ && git checkout ${BRANCH:-$(git describe --abbrev=0 --tags)} \
  && cd caddy/caddymain \
  && export LINE="$(grep -n "// This is where other plugins get plugged in (imported)" < run.go | sed 's/^\([0-9]\+\):.*$/\1/')" \
  && head -n ${LINE} run.go > newrun.go \