add the old snippet md files

old_snippets/fix-git-file-mode-changes.en.md

@@ -0,0 +1,40 @@
+---
+title: "fix git file mode changes"
+seo_description: "How to reset file modes via git diff."
+date: 2022-06-04T12:16:22+02:00
+draft: false
+snippet_types:
+- git
+---
+
+Before changing laptops I backed up all my personal projects to my NAS.  When I
+transfer them back the file modes got messed up and a **git status** returned
+this:
+
+```shell
+diff --git a/docker/Dockerfile b/docker/Dockerfile
+old mode 100644
+new mode 100755
+diff --git a/lib/DeployTool/CLI.rakumod b/lib/DeployTool/CLI.rakumogpg --list-secret-keys --keyid-format LONG <EMAIL>d
+old mode 100644
+new mode 100755
+diff --git a/lib/DeployTool/Config.rakumod b/lib/DeployTool/Config.rakumod
+old mode 100644
+new mode 100755
+```
+
+Git diff shell magic, thanks to [Stanislav Khromov](https://snippets.khromov.se),
+to the rescue!
+
+
+```shell
+$ git diff -p -R --no-ext-diff --no-color \
+    | grep -E "^(diff|(old|new) mode)" --color=never  \
+    | git apply
+```
+
+This command uses git diff and some clever grep logic to swap the file modes back to what git remembers them as.
+
+I also converted the snippet to a shell script [here](https://paste.sr.ht/~travisshears/ee89c97e7c6a54401b28d8b71ae1f796468dcb48)
+
+source: [Stanislav Khromov's blog](https://snippets.khromov.se/reset-file-mode-chmod-changes-when-making-a-git-commit/)