如何在GitHub查看文件diff？仓库路径定位及/compare拼接404问题

Hey there! I totally get the frustration of hitting a 404 when following docs—let's break this down so you can get to those file diffs without hassle.

First, let's clarify what that "repository path" the docs mention actually is: it's the base URL of your GitHub repository, without any extra bits like branch names, file paths, or /tree/... suffixes.

Here's a step-by-step fix:

• Grab the correct repository path:
  Go to your repository's main homepage (the one that shows the README, list of files, etc.). Look at your browser's address bar—if it looks like https://github.com/your-username/your-repo-name/tree/main, you need to trim off everything starting from /tree (or any other suffix like /blob). The correct path is just https://github.com/your-username/your-repo-name.
  Example: For the octocat/hello-world repo, the repository path is https://github.com/octocat/hello-world.

• Add /compare to the end:
  Take that trimmed URL and append /compare directly. Using the example above, it becomes https://github.com/octocat/hello-world/compare. This should load the compare view without a 404. Once there, you can select branches, tags, or commit hashes to generate the exact diff you need.

• Pro tip: Skip manual URL editing:
  You don't even need to mess with URLs if you don't want to. On your repo's homepage, look for the "Compare" button—usually near the "Code" dropdown or under the "Pull requests" tab. Clicking it takes you straight to the compare view, where you can pick your targets to diff.

The 404 happened because you probably added /compare to a URL that already had extra path elements (like a branch or file location). Sticking to the base repo URL fixes that.

内容的提问来源于stack exchange，提问作者Allahjane