bug#40940: 27.0.91; project-query-replace-regexp stops too early

[Dmitry Gutov <dgutov@yandex.ru>]

On 29.04.2020 13:41, Eli Zaretskii wrote:
> The patch below seems to fix the rest.  Note that I've decided to make
> the change in fileloop.el, since I think all the other callers need
> the same fix.

Naturally.

> Also, using downcase is not entirely correct, we should
> use isearch-no-upper-case-p instead.

I usually like isearch-no-upper-case-p behavior, but here it doesn't fit 
the docstring, does it? There is no value of CASE-FOLD described that 
would indicate that the function will be too smart about it.

So we'd need to update the docstring that the CASE-FOLD value of t will 
obey the value of `search-upper-case'. Then we'll consult it as well, 
like isearch-search does.

Alternatively, we could for now use the below patch which changes the 
behavior less:

diff --git a/lisp/fileloop.el b/lisp/fileloop.el
index 543963feaf..c3c55badf5 100644
--- a/lisp/fileloop.el
+++ b/lisp/fileloop.el
@@ -175,14 +175,16 @@ fileloop-continue
              (funcall fileloop--operate-function)))
        (setq file-finished t))))

+(defun fileloop--case-fold (arg)
+  (if (memq arg '(t nil)) arg case-fold-search))
+
  ;;;###autoload
  (defun fileloop-initialize-search (regexp files case-fold)
    (let ((last-buffer (current-buffer)))
      (fileloop-initialize
       files
       (lambda ()
-       (let ((case-fold-search
-              (if (memq case-fold '(t nil)) case-fold case-fold-search)))
+       (let ((case-fold-search (fileloop--case-fold case-fold)))
           (re-search-forward regexp nil t)))
       (lambda ()
         (unless (eq last-buffer (current-buffer))
@@ -203,15 +205,16 @@ fileloop-initialize-replace
    (fileloop-initialize
     files
     (lambda ()
-     (let ((case-fold-search
-            (if (memql case-fold '(nil t)) case-fold case-fold-search)))
+     (let ((case-fold-search (fileloop--case-fold case-fold)))
         (if (re-search-forward from nil t)
  	   ;; When we find a match, move back
  	   ;; to the beginning of it so perform-replace
  	   ;; will see it.
  	   (goto-char (match-beginning 0)))))
     (lambda ()
-     (perform-replace from to t t delimited nil multi-query-replace-map))))
+     (let ((case-fold-search (fileloop--case-fold case-fold))
+           search-upper-case)
+       (perform-replace from to t t delimited nil 
multi-query-replace-map)))))

  (provide 'fileloop)
  ;;; fileloop.el ends here