Add Drone CI configuration

.drone.yml

@@ -0,0 +1,51 @@
+---
+kind: pipeline
+name: default
+
+steps:
+- name: "set image tags (normal build)"
+  image: alpine
+  environment:
+    VERSION: "7.2.10-r2"
+  commands:
+    - "./write-tags.sh $VERSION > .tags"
+    - "echo Will build the following tags:"
+    - "cat .tags"
+
+- name: "build docker image"
+  image: plugins/docker
+  settings:
+    repo: ovdnet/atheme
+    username:
+      from_secret: docker_user
+    password:
+      from_secret: docker_password
+    build_args:
+      - VERSION=7.2.10-r2
+  trigger:
+    branch:
+    - master
+
+- name: "set image tags (build with contrib)"
+  image: alpine
+  environment:
+    VERSION: "7.2.10-r2"
+  commands:
+    - "./write-tags.sh $VERSION contrib > .tags"
+    - "echo Will build the following tags:"
+    - "cat .tags"
+
+- name: "build docker image (contrib)"
+  image: plugins/docker
+  settings:
+    repo: ovdnet/atheme
+    username:
+      from_secret: docker_user
+    password:
+      from_secret: docker_password
+    build_args:
+      - VERSION=7.2.10-r2
+      - BUILD_CONTRIB_MODULES=true
+  trigger:
+    branch:
+    - master

write-tags.sh

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+#!/bin/sh
+# Write Docker tags for Drone CI: version-YYMMDD, version, maj.min, maj, latest
+
+VERSION="$1"
+SUFFIX="$2"
+
+if test -z "$VERSION"; then
+    echo "Usage: $0 <version> [<suffix>]"
+    exit 1
+fi
+
+if test -n "$SUFFIX"; then
+    case $SUFFIX in
+    "-"*) SUFFIX_HYPHENATED="$SUFFIX" ;;
+    *)    SUFFIX_HYPHENATED="-$SUFFIX" ;;
+    esac
+fi
+
+# Date based tag
+printf '%s' "$VERSION-$(date +%Y%m%d)$SUFFIX_HYPHENATED,"
+# Program version
+printf '%s' "$VERSION$SUFFIX_HYPHENATED,"
+# Major program version
+printf '%s' "$(printf '%s' "$VERSION" | cut -d . -f 1)"
+printf '%s' "$SUFFIX_HYPHENATED,"
+# maj.min pair. FIXME: failover if program version is not in the form x.y.z
+printf '%s' "$(printf '%s' "$VERSION" | cut -d . -f 1-2)"
+printf '%s' "$SUFFIX_HYPHENATED,"
+
+if test -z "$SUFFIX"; then
+    echo latest
+else
+    echo "$SUFFIX"
+fi