fix[work]: fix aws,cdr commands, easier git switch in emacs

pkgs/flake/git-replace/default.nix

@@ -0,0 +1,63 @@
+{ name, writeShellApplication, git, gnugrep, findutils, ... }:
+
+writeShellApplication {
+  inherit name;
+  runtimeInputs = [ git gnugrep findutils ];
+  text = ''
+
+    function help_and_exit() {
+        echo
+        echo "Remotely installs SwarselSystem on a target machine including secret deployment."
+        echo
+        echo "USAGE: $0 [-f/-t} <from> <to>"
+        echo
+        echo "ARGS:"
+        echo "  -f | --filenames                        Replace in filenames."
+        echo "  -d | --directory                        Replace text in files within this directory."
+        echo "  -r | --repo                             Replace text in files in the entire git repo."
+        echo "  -h | --help                             Print this help."
+        exit 0
+    }
+
+    target_files=false
+    target_repo=false
+    target_dirs=false
+    while [[ $# -gt 0 ]]; do
+        case "$1" in
+        -f | --filenames)
+            shift
+            target_files=true
+            ;;
+        -r | --repo)
+            shift
+            target_repo=rue
+            ;;
+        -d | --directory)
+            shift
+            target_dirs=rue
+            ;;
+        -h | --help) help_and_exit ;;
+        *)
+            echo "Invalid option detected."
+            help_and_exit
+            ;;
+        esac
+        shift
+    done
+
+
+    if [[ $target_files == "true" ]]; then
+      for file in $(git ls-files | grep "$1" | sed -e "s/\($1[^/]*\).*/\1/" | uniq); do
+        git mv "$file" "''${file//$1/$2}"
+      done
+    fi
+
+    if [[ $target_repo == "true" ]]; then
+      git grep -l "$1" | xargs sed -i "s/$1/$2/g"
+    fi
+
+    if [[ $target_dirs == "true" ]]; then
+      grep -rl "$1" . | xargs sed -i "s/$1/$2/g"
+    fi
+      '';
+}