feat: rewrite to run on plv8 and add support for pg_tle

.github/workflows/ci.yml

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+name: JS CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        rust:
+          - stable
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Setup Node.js environment
+      uses: actions/setup-node@v3.8.1
+
+    - name: NPM install with caching
+      run: npm install
+
+    - name: Build
+      run: npm run build
+
+    - name: Node Test
+      run: npm run test

.gitignore

@@ -1,14 +1,130 @@
-# Generated by Cargo
-# will have compiled files and executables
-debug/
-target/
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
 
-# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
-Cargo.lock
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
 
-# These are backup files generated by rustfmt
-**/*.rs.bk
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
 
-# MSVC Windows builds of rustc generate these, which store debugging information
-*.pdb
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*

.prettierrc

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+{
+  "printWidth": 120,
+  "trailingComma": "all",
+  "singleQuote": true
+}

.vscode/settings.json

@@ -1,5 +1,10 @@
 {
-    "rust-analyzer.linkedProjects": [
-
+    "deno.enable": true,
+    "deno.lint": true,
+    "deno.unstable": true,
+    "deno.enablePaths": [
+        "./src/deno/mod.ts",
+        "./examples/deno.ts",
+        "./tests/mod.test.ts"
     ]
 }

Makefile

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+.PHONY: test
+
+prepare:
+	npm install
+
+build:
+	npm run build
+
+test: prepare
+	npm run test
+	deno test -A .\tests\mod.test.ts
+
+clean:
+	echo "No clean implemented"
+
+publish: clean prepare build
+	npm publish
+
+format:
+	npx prettier --write src
+
+lint:
+	npx prettier --check src
+
+docs:
+	npx typedoc --out doc src
+
+show-docs: docs
+	open doc/index.html
+
+update-kernel:
+	node update-kernel.js

README.md

@@ -1,6 +1,74 @@
 # pg_extism
-An Extism sample showing how you can run Extism plugins from PostgreSQl using pgrx!
 
+**Note**: This is an experimental SDK.
+
+## Getting started
+Make sure [`plv8`](https://github.com/plv8/plv8) is installed on your server. Then enable it for your database:
+```sql
+create extension plv8;
+```
+
+Now run the script in [dist/index.sql](./dist/index.sql) and you'll get two SQL functions: `extism_create_plugin` and `extism_call`.
+
+## Use pg_extism
+
+Assume you have a table called `plugins`:
+```sql
+CREATE TABLE public.plugins (
+	id int4 GENERATED ALWAYS AS IDENTITY( INCREMENT BY 1 MINVALUE 1 MAXVALUE 2147483647 START 1 CACHE 1 NO CYCLE) NOT NULL,
+	"data" bytea NULL,
+	"name" varchar NULL,
+	CONSTRAINT plugins_pk PRIMARY KEY (id)
+);
+```
+
+Insert a few plugins into the table. And then call:
+
+```sql
+select extism_call(data, 'count_vowels', 'Hello World!') from plugins where id = 2;
+```
+
+**Note:** this assumes the plugin with id `2` has a function called `count_vowels`. You can find the plugin [here](https://github.com/extism/plugins/releases).
+
+If you want more control over your plugin, you can use `extism_create_plugin`:
+
+```sql
+-- DROP FUNCTION public.count_vowels_kv(varchar);
+
+CREATE OR REPLACE FUNCTION public.count_vowels_kv(input character varying)
+ RETURNS character varying
+ LANGUAGE plv8
+AS $function$
+	const createPlugin = plv8.find_function("extism_create_plugin");
+	const wasm = plv8.execute("select data from plugins where id = 3")[0];
+	const opts = {
+		useWasi: true,
+
+		functions: {
+			"extism:host/user": {
+				kv_read(cp, offs) {
+	                const key = cp.read(offs).text();
+				    let result = plv8.execute("SELECT value FROM kv WHERE key = $1", [key]);
+				    let value = result.length > 0 ? result[0].value : new Uint8Array([0, 0, 0, 0]);
+				    return cp.store(value);
+	            },
+	            kv_write(cp, kOffs, vOffs) {
+					const key = cp.read(kOffs).text();
+				    const value = cp.read(vOffs).bytes();
+				    let result = plv8.execute("SELECT value FROM kv WHERE key = $1", [key]);
+				    if (result.length > 0) {
+				        plv8.execute("UPDATE kv SET value = $1 WHERE key = $2", [value, key]);
+				    } else {
+				        plv8.execute("INSERT INTO kv (key, value) VALUES ($1, $2)", [key, value]);
+				    }
+	            }
+			}
+		}
+	};
+
+	const plugin = createPlugin(wasm, opts);
+	return plugin.call("count_vowels", input).text()
+$function$
+;
 ```
-cargo pgx run pg14
-```
+The above example shows how you can use `extism_create_plugin` to supply your own host functions to the plugin. You can find th source code for the plugin [here](https://github.com/extism/plugins/tree/main/count_vowels_kvstore).