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Example plugin

This provides a brief tutorial for creating a Woodpecker webhook plugin, using simple shell scripting, to make an http requests during the build pipeline.

What end users will see

The below example demonstrates how we might configure a webhook plugin in the YAML file:

pipeline:
webhook:
image: foo/webhook
settings:
url: http://foo.com
method: post
body: |
hello world

Write the logic

Create a simple shell script that invokes curl using the YAML configuration parameters, which are passed to the script as environment variables in uppercase and prefixed with PLUGIN_.

#!/bin/sh

curl \
-X ${PLUGIN_METHOD} \
-d ${PLUGIN_BODY} \
${PLUGIN_URL}

Package it

Create a Dockerfile that adds your shell script to the image, and configures the image to execute your shell script as the main entrypoint.

FROM alpine
ADD script.sh /bin/
RUN chmod +x /bin/script.sh
RUN apk -Uuv add curl ca-certificates
ENTRYPOINT /bin/script.sh

Build and publish your plugin to the Docker registry. Once published your plugin can be shared with the broader Woodpecker community.

docker build -t foo/webhook .
docker push foo/webhook

Execute your plugin locally from the command line to verify it is working:

docker run --rm \
-e PLUGIN_METHOD=post \
-e PLUGIN_URL=http://foo.com \
-e PLUGIN_BODY="hello world" \
foo/webhook