added content to readme.md

.drone.yml

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+pipeline:
+
+  test:
+    image: alpine
+    commands:
+      - cd test
+      - ./sendxmpp_parameter_test.sh
+
+  docker:
+    image: plugins/docker
+    repo: bunix42/drone-sendxmpp
+    tags:
+     - 0.1.0
+     - latest
+    secrets: [ docker_username, docker_password ]

Dockerfile

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+FROM debian:9-slim
+
+LABEL maintainer="hanjo@bunix.de"
+
+RUN apt-get update && apt-get install -y \
+  sendxmpp \
+  && rm -rf /var/lib/apt/lists/*
+
+ADD sendxmpp.sh /bin/sendxmpp.sh
+
+RUN chmod +x /bin/sendxmpp.sh
+
+ENTRYPOINT /bin/sendxmpp.sh

README.md

@@ -1,2 +1,60 @@
 # drone-sendxmpp
 
+Drone plugin for sending messages to Jabber accounts, using [sendxmpp](http://sendxmpp.hostname.sk/)
+
+![](https://drone.bunix.de/api/badges/bunix42/drone-sendxmpp/status.svg)
+[![](https://images.microbadger.com/badges/version/bunix42/drone-sendxmpp.svg)](https://microbadger.com/images/bunix42/drone-sendxmpp "Get your own version badge on microbadger.com")
+[![](https://images.microbadger.com/badges/image/bunix42/drone-sendxmpp.svg)](https://microbadger.com/images/bunix42/drone-sendxmpp "Get your own image badge on microbadger.com")
+[![](https://img.shields.io/docker/pulls/bunix42/drone-sendxmpp.svg)](https://hub.docker.com/r/bunix42/drone-sendxmpp/)
+
+# Usage
+
+## prerequisites
+
+you obviously need a valid jabber account to send messages, this can be your own account or a dedicated one just for your drone notifications.
+
+## standalone using docker
+
+```
+docker run
+  -e PLUGIN_USERNAME=someaccount
+	-e PLUGIN_JSERVER=jabberserver.invalid
+	-e SENDXMPP_PASSWORD=secret1234
+	-e PLUGIN_RECIPIENT=someone@jabberserver.invalid
+	bunix42/drone-sendxmpp
+```
+
+## drone pipeline
+
+```
+pipeline:
+  sendxmpp:
+    image: bunix42/drone-sendxmpp
+    pull: true
+    recipient: someone@jabberserver.invalid
+    jserver: jabberserver.invalid
+    secrets: [ sendxmpp_username, sendxmpp_password ]
+```
+
+### secret reference
+
+* `sendxmpp_username` username without domain part used for authentication
+* `sendxmpp_password` password used for authentication
+
+### parameter reference
+
+* `recipient` jabber id of the account to receive the message
+* `jserver` jabberserver of the sending account
+* `username` username to use for authentication (_better use drone secrets_)
+* `password` password to use for authentication (_better use drone secrets_)
+
+# TODO's
+
+* support for self-signed certificate authorities and common ca's (_currently tls validation is disabled_)
+* support for sending messages to chat rooms instead of single users
+* customizable message template (_currently its only `repo:tag/branch:status:link`_)
+
+# References
+
+* [sendxmpp](http://sendxmpp.hostname.sk/) is used for sending messages
+* [shunit2](https://github.com/kward/shunit2) is used for script testing

sendxmpp.sh

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+#!/bin/sh
+
+# set username from secret if not supplied
+[ -z "$PLUGIN_USERNAME" ] && [ -n "$SENDXMPP_USERNAME" ] && PLUGIN_USERNAME="${SENDXMPP_USERNAME}"
+[ -z "$PLUGIN_PASSWORD" ] && [ -n "$SENDXMPP_PASSWORD" ] && PLUGIN_PASSWORD="${SENDXMPP_PASSWORD}"
+
+# check if all required fields are set
+[ -z "$PLUGIN_USERNAME" ] && echo "missing username or sendxmpp_username secret" && exit 123
+[ -z "$PLUGIN_PASSWORD" ] && echo "missing password or sendxmpp_password secret" && exit 123
+[ -z "$PLUGIN_JSERVER" ] && echo "missing jserver" && exit 123
+[ -z "$PLUGIN_RECIPIENT" ] && echo "missing recipient" && exit 123
+
+# create message from drone environment
+[ -n "$DRONE_TAG"] && MSG="$DRONE_REPO_NAME:$DRONE_TAG" || MSG="$DRONE_REPO_NAME:$DRONE_TAG"
+MSG="$MSG:$DRONE_BUILD_STATUS:$DRONE_BUILD_LINK"
+
+CMD="sendxmpp \
+  -u ${PLUGIN_USERNAME} \
+	-j ${PLUGIN_JSERVER} \
+	-p ${PLUGIN_PASSWORD} \
+	--tls \
+	--verbose \
+	--no-tls-verify
+	${PLUGIN_RECIPIENT}"
+
+echo $MSG | $CMD

test/sendxmpp_parameter_test.sh

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+# !/bin/sh
+
+setUp() {
+	# if sendxmpp is present command will fail with err code 1 because of invalid domain
+	# otherwise it will ultimatly fail with return code 127 aka command not found
+	command -v sendxmpp > /dev/null && export EXPECTED_RETURN_CODE=1 || export EXPECTED_RETURN_CODE=127
+	export PLUGIN_USERNAME="username"
+	export PLUGIN_PASSWORD="password"
+	export PLUGIN_JSERVER="server.invalid"
+	export PLUGIN_RECIPIENT="foo@bar.invalid"
+}
+
+tearDown() {
+	unset PLUGIN_USERNAME
+	unset PLUGIN_PASSWORD
+	unset PLUGIN_JSERVER
+  unset PLUGIN_RECIPIENT
+	unset SENDXMPP_USERNAME
+	unset SENDXMPP_PASSWORD
+}
+
+testAllOk() {
+	stdout=$( ../sendxmpp.sh 2> /dev/null )
+	assertEquals $EXPECTED_RETURN_CODE $?
+	assertTrue "[ -z "$stdout" ]"
+}
+
+testMissingUsernameAndUsernameSecret() {
+	unset PLUGIN_USERNAME
+	unset SENDXMPP_USERNAME
+
+	stdout=$( ../sendxmpp.sh 2> /dev/null )
+	assertEquals 123 $?
+  assertEquals "missing username or sendxmpp_username secret" "$stdout"
+}
+
+testUsernameSecretSet() {
+  unset PLUGIN_USERNAME
+	export SENDXMPP_USERNAME="secretusername"
+
+	stdout=$( ../sendxmpp.sh 2> /dev/null )
+	assertEquals $EXPECTED_RETURN_CODE $?
+	assertTrue "[ -z "$stdout" ]"
+}
+
+testMissingPasswordAndPasswordSecret() {
+	unset PLUGIN_PASSWORD
+	unset SENDXMPP_PASSWORD
+
+	stdout=$( ../sendxmpp.sh 2> /dev/null )
+	assertEquals 123 $?
+  assertEquals "missing password or sendxmpp_password secret" "$stdout"
+}
+
+testPasswordSecretSet() {
+	unset PLUGIN_PASSWORD
+	export SENDXMPP_PASSWORD="secretpassword"
+
+	stdout=$( ../sendxmpp.sh 2> /dev/null )
+	assertEquals $EXPECTED_RETURN_CODE $?
+	assertTrue "[ -z "$stdout" ]"
+}
+
+testMissingJserver() {
+	unset PLUGIN_JSERVER
+
+	stdout=$( ../sendxmpp.sh 2> /dev/null )
+	assertEquals 123 $?
+	assertEquals "missing jserver" "$stdout"
+}
+
+testMissingRecipient() {
+	unset PLUGIN_RECIPIENT
+
+	stdout=$( ../sendxmpp.sh 2> /dev/null )
+	assertEquals 123 $?
+	assertEquals "missing recipient" "$stdout"
+}
+
+. ./shunit2