Renderer plugins (#231)

* refactor: pluggable renderers

* refactor: cache renderer per component

* docs: update comments on snowpack plugin `transform` method

* docs: add comments to renderer plugins

* refactor: convert components to Map

* fix: pass children through to astro __render

* refactor: move Components/ComponentInfo to shared types

* refactor: remove `gatherRuntimes` step, just scan output for imports

* refactor: update isComponentTag logic

* chore: move dependencies to renderers

* fix: cross-platform transform injection

* feat: defer renderer to react, fallback to preact

* fix: use double quotes in generated script

* test: fix failing children tests

* test: add workspaceRoot to all tests

* fix: pass props to renderer check

* chore: add test:core script back for convenience

* chore: remove unused external

* chore: rename renderers

* chore: add astring, estree-util-value-to-estree

* chore: render-component => __astro_component

* refactor: split hydrate logic to own file

* refactor: use `astro-fragment` rather than `div`

* chore: remove unused hooks

* chore: delete unused file

* chore: add changesets

* fix: Astro renderer should be async

* fix: remove <astro-fragment> for static content

* test: fix failing test

* chore: normalize config interface

* feat: allow renderers to inject a snowpackPlugin

* fix: resolve import URL before using dynamic import

* refactor: update renderers to use separate /server entrypoint

* refactor: update server renderer interface

* fix: get renderers working again

* test: debug failing test

* test: better debug

* test: better debug

* test: remove debug

* fix: support esm and cjs packages via "resolve"

* refactor: split hydrate functions into individual files

* fix: dependency resolution relative to projectRoot

* fix: @snowpack/plugin-postcss needs to be hoisted

* fix: do not test prettier-plugin-astro as it's not ready for primetime

1 files changed, 2 insertions, 1 deletions

diff --git a/packages/astro/src/compiler/transform/index.ts b/packages/astro/src/compiler/transform/index.ts
index 27f5a3212..d622846d9 100644
--- a/packages/astro/src/compiler/transform/index.ts
+++ b/packages/astro/src/compiler/transform/index.ts
@@ -8,6 +8,7 @@ import transformStyles from './styles.js';
 import transformDoctype from './doctype.js';
 import transformModuleScripts from './module-scripts.js';
 import transformCodeBlocks from './prism.js';
+import transformHydration from './hydration.js';
 
 interface VisitorCollection {
   enter: Map<string, VisitorFn[]>;
@@ -84,7 +85,7 @@ export async function transform(ast: Ast, opts: TransformOptions) {
   const cssVisitors = createVisitorCollection();
   const finalizers: Array<() => Promise<void>> = [];
 
-  const optimizers = [transformStyles(opts), transformDoctype(opts), transformModuleScripts(opts), transformCodeBlocks(ast.module)];
+  const optimizers = [transformHydration(), transformStyles(opts), transformDoctype(opts), transformModuleScripts(opts), transformCodeBlocks(ast.module)];
 
   for (const optimizer of optimizers) {
     collectVisitors(optimizer, htmlVisitors, cssVisitors, finalizers);