Packages: Create new spec-parser package

.eslintignore

@@ -2,5 +2,6 @@ build
 build-module
 coverage
 node_modules
+packages/spec-parser
 test/e2e/test-plugins
 vendor

bin/create-php-parser.js

@@ -5,7 +5,7 @@ const phpegjs = require( 'phpegjs' );
 const fs = require( 'fs' );
 const path = require( 'path' );
 
-const peg = fs.readFileSync( 'blocks/api/post.pegjs', 'utf8' );
+const peg = fs.readFileSync( 'packages/spec-parser/grammar.pegjs', 'utf8' );
 
 const parser = pegjs.generate(
 	peg,

bin/generate-public-grammar.js

@@ -2,7 +2,7 @@
 const parser = require( '../node_modules/pegjs/lib/parser.js' );
 const fs = require( 'fs' );
 const path = require( 'path' );
-const grammarSource = fs.readFileSync( './blocks/api/post.pegjs', 'utf8' );
+const grammarSource = fs.readFileSync( './packages/spec-parser/grammar.pegjs', 'utf8' );
 const grammar = parser.parse( grammarSource );
 
 function escape( text ) {

blocks/api/parser.js

@@ -10,11 +10,11 @@ import { flow, castArray, mapValues, omit, stubFalse } from 'lodash';
 import { autop } from '@wordpress/autop';
 import { applyFilters } from '@wordpress/hooks';
 import deprecated from '@wordpress/deprecated';
+import { parse as grammarParse } from '@wordpress/spec-parser';
 
 /**
  * Internal dependencies
  */
-import { parse as grammarParse } from './post-parser';
 import { getBlockType, getUnknownTypeHandlerName } from './registration';
 import { createBlock } from './factory';
 import { isValidBlock } from './validation';
@@ -365,7 +365,7 @@ export function createBlockWithFallback( blockNode ) {
  *
  * @return {Function} An implementation which parses the post content.
  */
-export const createParse = ( parseImplementation ) =>
+const createParse = ( parseImplementation ) =>
 	( content ) => parseImplementation( content ).reduce( ( memo, blockNode ) => {
 		const block = createBlockWithFallback( blockNode );
 		if ( block ) {