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diff-tool.js
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#!/usr/bin/env node
import simpleGit from 'simple-git';
import { program } from 'commander';
import fs from 'fs';
import path from 'path';
import * as Diff2Html from "diff2html";
// Define the CLI tool
program
.argument('<repoPath>', 'Path to the Git repository')
.argument('<baseBranch>', 'The base branch to compare')
.argument('<prBranch>', 'The pull request branch to compare')
.argument('<keywords>', 'Comma-separated keywords to search in the diff')
.option('-o, --output <outputPath>', 'Output path for the generated HTML file', './diff-output.html')
.option('-s, --separator <separator>', 'Separator for keywords', ',')
.action(async (repoPath, baseBranch, prBranch, keyword, options) => {
try {
const separator = options.separator || ',';
const keywords = keyword.split(separator).map(kw => kw.trim());
const repoAbsolutePath = path.resolve(repoPath);
const git = simpleGit(repoAbsolutePath);
await git.checkout(baseBranch);
const baseCommit = await git.revparse('HEAD');
await git.checkout(prBranch);
const prCommit = await git.revparse('HEAD');
const diff = await git.diff([`${baseCommit}`, `${prCommit}`]);
const diffJson = Diff2Html.parse(diff);
const filteredDiff = diffJson.map(file => {
file.blocks = file.blocks.filter(block =>
block.lines.some(line =>
keywords.some(kw => line.content.includes(kw))
)
);
return file;
}).filter(file => file.blocks.length > 0);
const diffHtmlContent = Diff2Html.html(filteredDiff, { inputFormat: 'json', outputFormat: 'line-by-line' });
const diffHtml = `
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Diff Output</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/diff2html/bundles/css/diff2html.min.css">
<script src="https://cdn.jsdelivr.net/npm/diff2html/bundles/js/diff2html.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/10.7.2/highlight.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/10.7.2/styles/github.min.css">
<style>
body {
font-family: Arial, sans-serif;
padding: 20px;
}
</style>
</head>
<body>
<h1>Git Diff with Keyword "${keyword}"</h1>
<div id="diff"></div>
<script>
document.getElementById("diff").innerHTML = ${JSON.stringify(diffHtmlContent)};
document.querySelectorAll('pre code').forEach(el => hljs.highlightElement(el));
</script>
</body>
</html>
`;
const outputFilePath = path.resolve(options.output);
fs.writeFileSync(outputFilePath, diffHtml);
console.log(`Diff for search input "${keyword}" written to ${outputFilePath}`);
} catch (error) {
console.error('Error:', error);
}
});
program.parse(process.argv);