chore: remove old parser

tools/challenge-parser/parser/index.js

@@ -0,0 +1,58 @@
+const { readSync } = require('to-vfile');
+const remark = require('remark-parse');
+const directive = require('remark-directive');
+const frontmatter = require('remark-frontmatter');
+const addTests = require('./plugins/add-tests');
+const replaceImports = require('./plugins/replace-imports');
+const addFrontmatter = require('./plugins/add-frontmatter');
+const addText = require('./plugins/add-text');
+const addVideoQuestion = require('./plugins/add-video-question');
+const addSeed = require('./plugins/add-seed');
+const addSolution = require('./plugins/add-solution');
+const tableAndStrikeThrough = require('./plugins/table-and-strikethrough');
+const unified = require('unified');
+
+// by convention, anything that adds to file.data has the name add<name>.
+const processor = unified()
+  // add the remark parser
+  .use(remark)
+  // modify the parser so that Github flavour tables and strikethroughs get
+  // converted to 'delete' nodes
+  .use(tableAndStrikeThrough)
+  // directives are parsed into 'leafDirective' nodes and used for imports
+  .use(directive)
+  // convert the text at the top of the document (surrounded by ---) into a
+  // 'yaml' node
+  .use(frontmatter, ['yaml'])
+  // extract the content from that 'yaml' node
+  .use(addFrontmatter)
+  // Any imports will be replaced (in the tree) with
+  // the sub-tree of the target file. e.g.
+  // ::import{component="Script" from="./file.path" }
+  // means that file.path's tree will be inserted wherever
+  // ::use{component="Script"}
+  // appears.
+  .use(replaceImports)
+  // the final five plugins insert content into file.data
+  .use(addText, ['description', 'instructions'])
+  // TODO: rename test->hint everywhere? It should make things easier to reason
+  // about.
+  .use(addTests)
+  .use(addVideoQuestion)
+  .use(addSeed)
+  .use(addSolution);
+
+exports.parseMD = function parseMD(filename) {
+  return new Promise((resolve, reject) => {
+    const file = readSync(filename);
+    const tree = processor.parse(file);
+    processor.run(tree, file, function(err, node, file) {
+      if (err) {
+        err.message += ' in file ' + filename;
+        reject(err);
+      }
+      delete file.contents;
+      return resolve(file.data);
+    });
+  });
+};