auto indent js files

Author: ShMcK

parser/compile/indent.js

@@ -0,0 +1,37 @@
+'use strict';
+
+// https://github.com/sindresorhus/repeating/blob/master/index.js
+// https://github.com/sindresorhus/indent-string/blob/master/index.js
+
+const repeating = (n, str) => {
+	str = str === undefined ? ' ' : str;
+	let ret = '';
+	do {
+		if (n & 1) {
+			ret += str;
+		}
+		str += str;
+	} while ((n >>= 1));
+	return ret;
+}
+
+module.exports = (str, count) => {
+	let indent = ' ';
+	count = count === undefined ? 1 : count;
+
+	if (typeof str !== 'string') {
+		throw new TypeError(`Expected \`input\` to be a \`string\`, got \`${typeof str}\``);
+	}
+
+	if (typeof count !== 'number') {
+		throw new TypeError(`Expected \`count\` to be a \`number\`, got \`${typeof count}\``);
+	}
+
+	if (count === 0) {
+		return str;
+	}
+
+	indent = count > 1 ? repeating(count, indent) : indent;
+
+	return str.replace(/^(?!\s*$)/mg, indent);
+};

parser/compile/index.js

@@ -4,7 +4,7 @@ const pegjs = require('pegjs');
 const loadImports = require('./loadImports');
 
 let compiled = '';
-const start = readFileSync(join(__dirname, '../pegjs/start.pegjs'), 'utf8');
+const start = readFileSync(join(__dirname, '../pegjs/index.pegjs'), 'utf8');
 
 compiled += loadImports(start);
 

parser/compile/loadImports.js

@@ -1,13 +1,29 @@
 const { readFileSync } = require('fs');
 const { join } = require('path');
+const indent = require('./indent');
 
 const importPath = /^@import\((.+)\)$/gm;
+const pegjs = /\.pegjs$/;
 
 function loadImports(str) {
+  // collect all imports
   const imports = str.match(importPath);
+
   imports.forEach(i => {
-    const fileName = i.slice(9, -2) + '.pegjs';
-    const file = readFileSync(join(__dirname, '../pegjs/', fileName), 'utf8');
+
+    // capture file name
+    const fileName = i.slice(9, -2);
+
+    // load import
+    let file = readFileSync(join(__dirname, '../pegjs/', fileName), 'utf8');
+
+
+    // indent js files
+    if (!fileName.match(pegjs)) {
+      file = indent(file, 2);
+    }
+
+    // add imported file to text
     str = str.replace(i, file);
   });
   return str;

parser/index.pegjs

@@ -37,7 +37,6 @@
     return trimQuotes(trimBrackets(str));
   }
 
-
 }
 
 start
@@ -63,7 +62,6 @@ info_title
     title: content
   { return adjust(title); }
 
-
 page
   = title: page_title
     description: description*
@@ -83,7 +81,6 @@ page_title
     break
   { return adjust(title); }
 
-
 page_task
 	= '+'
     space?
@@ -119,11 +116,9 @@ task_hint
   	return { type: 'hints', value: h };
   }
 
-
 page_actions
   = on_page_complete
 
-
 on_page_complete
 	= '@onPageComplete'
     '('
@@ -143,7 +138,6 @@ page_import
     break
   { return filePath.join(''); }
 
-
 task_action
 	= '@action'
     '('
@@ -202,13 +196,11 @@ action_write_from_file
     quote
     ')'
 
-
 description
   = description: content
     break
   { return adjust(description); }
 
-
 content = [^#^@^+] [^\n^\r]+ [\n\r]
 space = [ \s]
 break = [\n\r]?

parser/pegjs/data.js

@@ -0,0 +1,8 @@
+// final parsed output for coderoad.json file
+var output = {
+  info: {
+    title: 'Tutorial Title',
+    description: '',
+  },
+  pages: []
+};

parser/pegjs/functions.js

@@ -0,0 +1,32 @@
+function adjust(item) {
+  return item[0].concat(item[1].join(''));
+}
+
+function trim({desc, str, first, last}) {
+  if ( str[0].match(first) && str[str.length - 1].match(last || first) ) {
+    return str.slice(1, -1);
+  }
+  console.log('Error. Could not parse ' + desc + ' in ' + str);
+  return str;
+}
+
+function trimBrackets(str) {
+  return trim({
+    desc: 'bracket',
+    str: str,
+    first: /\(/,
+    last: /\)/,
+  });
+}
+
+function trimQuotes(str) {
+  return trim({
+    desc: 'quote',
+    str,
+    first: /[\"\'\`]/
+  });
+}
+
+function trimBracketsAndQuotes(str) {
+  return trimQuotes(trimBrackets(str));
+}

parser/pegjs/functions.pegjs

@@ -0,0 +1,21 @@
+{
+@import('./data.js')
+@import('./functions.js')
+}
+
+start
+  = doc
+  { return output; }
+
+doc
+  = info
+  	break?
+	  page*
+
+@import('./info.pegjs')
+@import('./page.pegjs')
+@import('./task.pegjs')
+@import('./page-actions.pegjs')
+@import('./task-actions.pegjs')
+@import('./shared.pegjs')
+@import('./characters.pegjs')

parser/pegjs/index.pegjs

@@ -1,7 +1,6 @@
 page_actions
   = on_page_complete
 
-
 on_page_complete
 	= '@onPageComplete'
     '('

parser/pegjs/page-actions.pegjs

@@ -16,3 +16,15 @@ page_title
     title: content
     break
   { return adjust(title); }
+
+page_task
+	= '+'
+    space?
+  	description: description
+    actions: task_actions*
+    break?
+
+  { let task = { description, tests: [], hints: [] };
+	  actions.forEach(({type, value}) => task[type].push(value));
+	  return task;
+  }

parser/pegjs/page.pegjs

@@ -1,15 +1,3 @@
-page_task
-	= '+'
-    space?
-  	description: description
-    actions: task_actions*
-    break?
-
-  { let task = { description, tests: [], hints: [] };
-	  actions.forEach(({type, value}) => task[type].push(value));
-	  return task;
-  }
-
 task_actions
   = test: task_test
   / hint: task_hint