[PATCH 1/4] Split byte-recompile-directory into byte-recompile-file

[Julien Danjou]

Signed-off-by: Julien Danjou <address@hidden>
---
 lisp/ChangeLog              |    5 +++
 lisp/emacs-lisp/bytecomp.el |   75 +++++++++++++++++++++++++++++++++----------
 2 files changed, 63 insertions(+), 17 deletions(-)

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 3111ade..34a1dfd 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2010-09-21  Julien Danjou  <address@hidden>
+
+       * emacs-lisp/bytecomp.el (byte-recompile-file): Add this function.
+       (byte-recompile-directory): Use `byte-recompile-file'.
+
 2010-09-21  Michael Albinus  <address@hidden>
 
        * net/ange-ftp.el (ange-ftp-skip-msgs): Add "^504 ..." message.
diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index aca3a54..e6f55e1 100644
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -37,6 +37,7 @@
 ;; ========================================================================
 ;; Entry points:
 ;;     byte-recompile-directory, byte-compile-file,
+;;      byte-recompile-file,
 ;;     batch-byte-compile, batch-byte-recompile-directory,
 ;;     byte-compile, compile-defun,
 ;;     display-call-tree
@@ -1551,23 +1552,10 @@ that already has a `.elc' file."
                        (not (auto-save-file-name-p bytecomp-source))
                        (not (string-equal dir-locals-file
                                           (file-name-nondirectory
-                                           bytecomp-source)))
-                       (setq bytecomp-dest
-                              (byte-compile-dest-file bytecomp-source))
-                       (if (file-exists-p bytecomp-dest)
-                           ;; File was already compiled.
-                           (or bytecomp-force
-                                (file-newer-than-file-p bytecomp-source
-                                                        bytecomp-dest))
-                         ;; No compiled file exists yet.
-                         (and bytecomp-arg
-                              (or (eq 0 bytecomp-arg)
-                                  (y-or-n-p (concat "Compile "
-                                                     bytecomp-source "? "))))))
-                  (progn (if (and noninteractive (not byte-compile-verbose))
-                             (message "Compiling %s..." bytecomp-source))
-                         (let ((bytecomp-res (byte-compile-file
-                                               bytecomp-source)))
+                                           bytecomp-source))))
+                  (progn (let ((bytecomp-res (byte-recompile-file
+                                               bytecomp-source
+                                               bytecomp-force bytecomp-arg)))
                            (cond ((eq bytecomp-res 'no-byte-compile)
                                   (setq skip-count (1+ skip-count)))
                                  ((eq bytecomp-res t)
@@ -1595,6 +1583,59 @@ This is normally set in local file variables at the end 
of the elisp file:
 ;; Local Variables:\n;; no-byte-compile: t\n;; End: ")
 ;;;###autoload(put 'no-byte-compile 'safe-local-variable 'booleanp)
 
+(defun byte-recompile-file (bytecomp-filename &optional bytecomp-force 
bytecomp-arg load)
+  "Recompile BYTECOMP-FILENAME file if it needs recompilation.
+This happens when its `.elc' file is older than itself.
+
+If the `.elc' file exists and is up-to-date, normally this
+function *does not* compile BYTECOMP-FILENAME. However, if the
+prefix argument BYTECOMP-FORCE is set, that means do compile
+BYTECOMP-FILENAME even if the destination already exists and is
+up-to-date.
+
+If the `.elc' file does not exist, normally this function *does
+not* compile BYTECOMP-FILENAME. If BYTECOMP-ARG is 0, that means
+compile the file even if it has never been compiled before.
+A nonzero BYTECOMP-ARG means ask the user.
+
+If LOAD is set, `load' the file after compiling.
+
+The value returned is the value returned by `byte-compile-file',
+or 'no-byte-compile if the file did not need recompilation."
+  (interactive
+      (let ((bytecomp-file buffer-file-name)
+        (bytecomp-file-name nil)
+        (bytecomp-file-dir nil))
+     (and bytecomp-file
+         (eq (cdr (assq 'major-mode (buffer-local-variables)))
+             'emacs-lisp-mode)
+         (setq bytecomp-file-name (file-name-nondirectory bytecomp-file)
+               bytecomp-file-dir (file-name-directory bytecomp-file)))
+     (list (read-file-name (if current-prefix-arg
+                              "Byte compile file: "
+                            "Byte recompile file: ")
+                          bytecomp-file-dir bytecomp-file-name nil)
+          current-prefix-arg)))
+  (let ((bytecomp-dest
+         (byte-compile-dest-file bytecomp-filename))
+        ;; Expand now so we get the current buffer's defaults
+        (bytecomp-filename (expand-file-name bytecomp-filename)))
+    (if (if (file-exists-p bytecomp-dest)
+            ;; File was already compiled
+            ;; Compile if forced to, or filename newer
+            (or bytecomp-force
+                (file-newer-than-file-p bytecomp-filename
+                                         bytecomp-dest))
+          (or (eq 0 bytecomp-arg)
+              (y-or-n-p (concat "Compile "
+                                bytecomp-filename "? "))))
+        (progn
+          (if (and noninteractive (not byte-compile-verbose))
+              (message "Compiling %s..." bytecomp-source))
+          (byte-compile-file bytecomp-filename load))
+      (when load (load bytecomp-filename))
+      'no-byte-compile)))
+
 ;;;###autoload
 (defun byte-compile-file (bytecomp-filename &optional load)
   "Compile a file of Lisp code named BYTECOMP-FILENAME into a file of byte 
code.
-- 
1.7.1