Add Keep File Locally With git rm as a Git TIL

git/keep-file-locally-with-git-rm.md

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+# Keep File Locally With `git rm`
+
+Let's say I've added a new file `data.json` to my repo as part of the most
+recent commit. I realize this isn't the point at which I want to add that file.
+So, I do `git rm data.json` and then `git commit --amend` to rework that
+commit.
+
+However, when I look in my working tree, or even just my file system, I'll
+notice that `data.json` is gone. The `git rm` command completely removed the
+file since it was previously an untracked file.
+
+To keep `git rm` from tossing out my file like that, I can include the
+`--cached` flag which will remove the file from the index (stages it to be
+`deleted`), but restore it to the working directory.
+
+```bash
+$ git rm --cached data.json
+```
+
+See `man git-rm` for more details on the `--cached` flag.