Fix #58: build system (#59)

plugins/demo/README.md

@@ -0,0 +1,25 @@
+# Demo
+
+A demo project of a custom scittle build.
+
+See:
+
+- `bb.edn` with
+  - `:deps` which includes:
+    - a dependency on the `scittle.build` project to build scittle + custom features
+    - zero or more plugin dependencies
+    - helpers like static file server
+  - development `:tasks`. Run `bb dev` for development and `bb release` to produce release artifacts.
+- `deps.edn`: this only contains a dependency on scittle itself
+
+Available plugins are in the `plugins` directory inside the top level directory of this repo.
+
+Writing a plugin involves writing
+
+- SCI configuration (this can be shared with users in the [sci.configs](https://github.com/babashka/sci.configs) project
+- Adding a `scittle_plugin.edn` file on the plugin's classpath (e.g. in the `src` directory). This EDN file contains:
+  - `:name`, name of the plugin
+  - `:namespaces`: the namespaces exposed to SCI
+  - `:js`: the name of the produced `.js` module file
+  - `:shadow-config`: the shadow-cljs configuration specific to this plugin
+- A `.cljs` file with an `init` function which calls `scittle/register-plugin!`.