oliverdavies.uk/content/node.0f64feba-0a96-41e4-b8e3-10358e4c86c6.yml

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title:
  - value: 'Referencing other commits in commit messages'
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      <p>Last week, I asked <a href="/daily/2024/05/15/should-you-include-issue-ids-in-your-commit-messages">whether you should include issue IDs in commit messages</a>.</p>

      <p>Another thing I like to reference in a commit message is the commit ID (or SHA) of a related commit.</p>

      <p>For example, when I run <code>git log</code> in my website repository, I see commits like this:</p>

      <pre><code class="plain">commit 0c91825c16217d0fe7eff4ea100a67550051c4a9
      Author: Oliver Davies &lt;oliver@oliverdavies.dev&gt;
      Date:   Sat May 11 15:32:07 2024 +0200

          Create a cached talk counter

          Create a cached version of the talk counter service that returns a
          cached result of the talk count for that day.

          This uses the Decorator design pattern to decorate the existing
          `TalkCounter` service and works as they both implement the same
          `TalkCounterInterface`.
      </code></pre>

      <p>The sha for this commit is <code>0c91825c16217d0fe7eff4ea100a67550051c4a9</code>.</p>

      <p>If I was to make another commit that was related to this one, I can include this commit sha in my new commit message.</p>

      <p>I also don't need to include the entire thing - only enough for it to be unique (usually five or six characters).</p>

      <p>Once pushed, the commit IDs should never change, so this will be a permanent reference to the first commit.</p>

      <p>Helpfully, websites like GitHub, GitLab and Bitbucket will identify it as a commit sha and make it clickable so you can easily navigate to the referenced commit.</p>

              
    format: full_html
    processed: |
      <p>Last week, I asked <a href="/daily/2024/05/15/should-you-include-issue-ids-in-your-commit-messages">whether you should include issue IDs in commit messages</a>.</p>

      <p>Another thing I like to reference in a commit message is the commit ID (or SHA) of a related commit.</p>

      <p>For example, when I run <code>git log</code> in my website repository, I see commits like this:</p>

      <pre><code class="plain">commit 0c91825c16217d0fe7eff4ea100a67550051c4a9
      Author: Oliver Davies &lt;oliver@oliverdavies.dev&gt;
      Date:   Sat May 11 15:32:07 2024 +0200

          Create a cached talk counter

          Create a cached version of the talk counter service that returns a
          cached result of the talk count for that day.

          This uses the Decorator design pattern to decorate the existing
          `TalkCounter` service and works as they both implement the same
          `TalkCounterInterface`.
      </code></pre>

      <p>The sha for this commit is <code>0c91825c16217d0fe7eff4ea100a67550051c4a9</code>.</p>

      <p>If I was to make another commit that was related to this one, I can include this commit sha in my new commit message.</p>

      <p>I also don't need to include the entire thing - only enough for it to be unique (usually five or six characters).</p>

      <p>Once pushed, the commit IDs should never change, so this will be a permanent reference to the first commit.</p>

      <p>Helpfully, websites like GitHub, GitLab and Bitbucket will identify it as a commit sha and make it clickable so you can easily navigate to the referenced commit.</p>

              
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