Lemmy Plugins

This repository contains various example plugins for Lemmy. See the Extism documentation for details on how to write plugins. Lemmy-specific details and available hooks are described in the RFC.

Go: Replace Words

Uses the create_local_post hook to listen for newly created posts, replacing some words and rejecting posts containing specific terms. See go-pdk readme for detailed documentation.

Use the following steps to compile it:

apt install go
# install tinygo: https://tinygo.org/getting-started/install/linux/
cd plugins/go_replace_words
tinygo build -o ../go_replace_words.wasm -target wasip1 -buildmode=c-shared main.go

Typescript: Push Webhook

Listens to new_post hook which is called after any local or remote post is created. Then calls the url configured in the manifest (plugins/typescript_push_webhook.json) with the post's ap_id. See js-pdk readme for setup and detailed documentation.

Use the following steps to compile it:

apt install npm typescript
# use steps in js-pdk readme to install extism-js
cd plugins/typescript_push_webhook
npm install
npm run build

Rust: Allowed Voters

Listens to new_vote hook, then calls /api/v4/person to get details about the voter. It only allows downvotes if the user has made at least 5 posts before. See rust-pdk readme for setup and detailed documentation.

Use the following steps to compile it:

apt install cargo
cd plugins/rust_allowed_voters
cargo build
cp target/wasm32-unknown-unknown/debug/rust_allowed_voters.wasm ..

Tests

This repository contains test cases for the plugins. To run them install pnpm and postgresql, with a database postgres://lemmy:password@localhost:5432/lemmy. Then compile all the plugins as described above, go into tests folder and execute ./run.sh.