master a30781399b3: * subr-x (eval-command-interactive-spec): New function.

[Sean Whitton]

branch: master
commit a30781399b3ef48150b9cb13cb0aeba7086c2d9e
Author: Sean Whitton <spwhitton@spwhitton.name>
Commit: Sean Whitton <spwhitton@spwhitton.name>

    * subr-x (eval-command-interactive-spec): New function.
---
 etc/NEWS                   | 5 +++++
 lisp/emacs-lisp/nadvice.el | 2 ++
 lisp/emacs-lisp/subr-x.el  | 7 +++++++
 3 files changed, 14 insertions(+)

diff --git a/etc/NEWS b/etc/NEWS
index 9529282f047..910472e5519 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -648,6 +648,11 @@ Since circular alias chains now cannot occur, 
'function-alias-p',
 'indirect-function' and 'indirect-variable' will never signal an error.
 Their 'noerror' arguments have no effect and are therefore obsolete.
 
+---
+** New function 'eval-command-interactive-spec' in the subr-x library.
+This function evaluates a command's interactive form and returns the
+resultant list.
+
 
 * Changes in Emacs 30.1 on Non-Free Operating Systems
 
diff --git a/lisp/emacs-lisp/nadvice.el b/lisp/emacs-lisp/nadvice.el
index e457387acc9..e6977f2012a 100644
--- a/lisp/emacs-lisp/nadvice.el
+++ b/lisp/emacs-lisp/nadvice.el
@@ -165,6 +165,8 @@ DOC is a string where \"FUNCTION\" and \"OLDFUN\" are 
expected.")
          (buffer-string))
        usage))))
 
+;; FIXME: How about renaming this to just `eval-interactive-spec'?
+;; It's not specific to the advice system.
 (defun advice-eval-interactive-spec (spec)
   "Evaluate the interactive spec SPEC."
   (cond
diff --git a/lisp/emacs-lisp/subr-x.el b/lisp/emacs-lisp/subr-x.el
index 9e906930b92..a7d8f785508 100644
--- a/lisp/emacs-lisp/subr-x.el
+++ b/lisp/emacs-lisp/subr-x.el
@@ -504,6 +504,13 @@ Used by `emacs-authors-mode' and `emacs-news-mode'."
                           (progn (forward-line -1) (point))
                         (point-max)))))
 
+(defun eval-command-interactive-spec (command)
+  "Evaluate COMMAND's interactive form and return resultant list.
+If COMMAND has no interactive form, return nil."
+  (advice-eval-interactive-spec
+   (cadr (or (and (symbolp command) (get command 'interactive-form))
+             (interactive-form command)))))
+
 (provide 'subr-x)
 
 ;;; subr-x.el ends here