Simplify build infra

Build/lib/create-file.js

@@ -0,0 +1,99 @@
+// @ts-check
+const { promises: fsPromises } = require('fs');
+const fse = require('fs-extra');
+const { readFileByLine } = require('./fetch-remote-text-by-line');
+const { surgeDomainsetToClashDomainset, surgeRulesetToClashClassicalTextRuleset } = require('./clash');
+
+/**
+ * @param {string[]} linesA
+ * @param {string} filePath
+ */
+async function compareAndWriteFile(linesA, filePath) {
+  await fse.ensureFile(filePath);
+
+  let isEqual = true;
+  let index = 0;
+
+  for await (const lineB of readFileByLine(filePath)) {
+    const lineA = linesA[index];
+    index++;
+
+    if (lineA[0] === '#' && lineB[0] === '#') {
+      continue;
+    }
+
+    if (lineA !== lineB) {
+      isEqual = false;
+      break;
+    }
+  }
+
+  if (!isEqual || index !== linesA.length - 1) {
+    await fsPromises.writeFile(
+      filePath,
+      linesA.join('\n'),
+      { encoding: 'utf-8' }
+    );
+  } else {
+    console.log(`Same Content, bail out writing: ${filePath}`);
+  }
+}
+module.exports.compareAndWriteFile = compareAndWriteFile;
+
+/**
+ * @param {string} title
+ * @param {string[]} description
+ * @param {Date} date
+ * @param {string[]} content
+ * @returns {string[]}
+ */
+const withBannerArray = (title, description, date, content) => {
+  return [
+    '########################################',
+    `# ${title}`,
+    `# Last Updated: ${date.toISOString()}`,
+    `# Size: ${content.length}`,
+    ...description.map(line => (line ? `# ${line}` : '#')),
+    '########################################',
+    ...content,
+    '################# END ###################',
+    ''
+  ];
+};
+module.exports.withBannerArray = withBannerArray;
+
+/**
+ * @param {string} title
+ * @param {string[]} description
+ * @param {Date} date
+ * @param {string[]} content
+ * @param {'ruleset' | 'domainset'} type
+ * @param {string} surgePath
+ * @param {string} clashPath
+ */
+const createRuleset = (
+  title, description, date, content,
+  type, surgePath, clashPath
+) => {
+  const surgeContent = withBannerArray(title, description, date, content);
+
+  let _clashContent;
+  switch (type) {
+    case 'domainset':
+      _clashContent = surgeDomainsetToClashDomainset(content);
+      break;
+    case 'ruleset':
+      _clashContent = surgeRulesetToClashClassicalTextRuleset(content);
+      break;
+    default:
+      throw new TypeError(`Unknown type: ${type}`);
+  }
+
+  const clashContent = withBannerArray(title, description, date, _clashContent);
+
+  return [
+    compareAndWriteFile(surgeContent, surgePath),
+    compareAndWriteFile(clashContent, clashPath)
+  ];
+};
+module.exports.createRuleset = createRuleset;