Emacs Bash scripts imenu: Support hyphens in function names

add-hyphen-bash-imenu.el

;;; add-hyphen-bash-imenu.el --- Bash scripts imenu: Support hyphens in function names -*- lexical-binding: t; -*-
;; Gits URL: https://gist.github.com/jamescherti/3dcfe5b67b69a331b09c3db66e82d5fc
;; License: MIT
;; Author: James Cherti
;;
;; This patch has been integrated into Emacs:
;; https://lists.gnu.org/archive/html/emacs-devel/2024-11/msg00684.html

(with-eval-after-load "sh-script"
  ;; By default, imenu does not include functions with hyphens in their names by
  ;; default. While it is true that sh does not allow hyphens in function names,
  ;; Bash does permit them. The following code snippet adds a hyphen '-' to the imenu
  ;; Bash script regular expression.
  (let ((bash-entry
         '((nil
            ;; function FOO / function FOO()
            "^\\s-*function\\s-+\\([[:alpha:]_][[:alnum:]_-]*\\)\\s-*\\(?:()\\)?"
            1)
           ;; FOO()
           (nil
            "^\\s-*\\([[:alpha:]_][[:alnum:]_-]*\\)\\s-*()"
            1))))
    (if-let ((entry (assoc 'bash sh-imenu-generic-expression)))
        (setcdr entry bash-entry)
      (push (cons 'bash bash-entry) sh-imenu-generic-expression))))