upd: fix bug where realpath could crash

.config/shell/bin/upd

@@ -51,21 +51,16 @@ contains() {
 pretty_path() {
    arg="$1"
 
+   # If the arg starts with our home dir, replace the prefix with a tilde
    case "$arg" in
-      # If the arg starts with our home dir,
       "$HOME"*)
-         # replace the home dir part with a ~
-         printf '~%s' "$(printf '%s' "$arg" | sed -E 's/^.{'"${#HOME}"'}//')"
+         arg="~${arg#"$HOME"}"
          ;;
+   esac
 
-      # Otherwise,
-      *)
-         # Just print the arg
-         printf '%s' "${arg}"
-         ;;
-   esac | # Pass through some other filters
-      sed -E 's_/+$__' | # Remove trailing slash
-      tr -s '/' # Remove duplicate slashes
+   printf '%s' "$arg" |
+      tr -s '/' | # Remove duplicate slashes
+      sed 's+/$++' # Remove trailing slash
 }
 
 # Warn about incomplete changes to a repository
@@ -101,7 +96,7 @@ do_pull() {
    for repo in "$@"; do
       if [ -n "$repo" ]; then
          repo_pretty="$(pretty_path "$repo")"
-         repo="$(realpath "$repo" 2>/dev/null)"
+         repo="$(realpath "$repo" 2>/dev/null || true)"
          repo="$(git -C "$repo" rev-parse --show-toplevel 2> /dev/null || true)"
          if  [ -n "$repo" ]; then
             if ! contains "$repo" ':' "$updated"; then
@@ -133,7 +128,7 @@ do_pull() {
       ${did_updates:-false} && echo
       echo " Updating ${green}dotfiles${nc}…"
       dotfiles pull
-      do_checks "$(dotfiles rev-parse --git-dir)" dotfiles
+      do_checks "$(pretty_path "$(dotfiles rev-parse --git-dir)")" dotfiles
    fi
 }