etc: Support indentation of whole files.

* etc/indent-package.el.in: Rename to...
* etc/indent-code.el.in: ... this.  Add case for a single argument.
* doc/contributing.texi (Formatting Code): Adjust accordingly.
* configure.ac: Likewise.

.gitignore

@@ -128,4 +128,4 @@ stamp-h[0-9]
 tmp
 /doc/os-config-lightweight-desktop.texi
 /nix/scripts/download
-/etc/indent-package.el
+/etc/indent-code.el

configure.ac

@@ -245,6 +245,6 @@ AC_CONFIG_FILES([scripts/guix], [chmod +x scripts/guix])
 AC_CONFIG_FILES([test-env:build-aux/test-env.in], [chmod +x test-env])
 AC_CONFIG_FILES([pre-inst-env:build-aux/pre-inst-env.in],
   [chmod +x pre-inst-env])
-AC_CONFIG_FILES([etc/indent-package.el], [chmod +x etc/indent-package.el])
+AC_CONFIG_FILES([etc/indent-code.el], [chmod +x etc/indent-code.el])
 
 AC_OUTPUT

doc/contributing.texi

@@ -256,12 +256,17 @@ If you do not use Emacs, please make sure to let your editor knows these
 rules.  To automatically indent a package definition, you can also run:
 
 @example
-./etc/indent-package.el gnu/packages/@var{file}.scm @var{package}
+./etc/indent-code.el gnu/packages/@var{file}.scm @var{package}
 @end example
 
 @noindent
 This automatically indents the definition of @var{package} in
-@file{gnu/packages/@var{file}.scm} by running Emacs in batch mode.
+@file{gnu/packages/@var{file}.scm} by running Emacs in batch mode.  To
+indent a whole file, omit the second argument:
+
+@example
+./etc/indent-code.el gnu/services/@var{file}.scm
+@end example
 
 We require all top-level procedures to carry a docstring.  This
 requirement can be relaxed for simple private procedures in the
@@ -374,7 +379,7 @@ or a package update along with fixes to that package.
 
 @item
 Please follow our code formatting rules, possibly running the
-@command{etc/indent-package.el} script to do that automatically for you
+@command{etc/indent-code.el} script to do that automatically for you
 (@pxref{Formatting Code}).
 
 @end enumerate

etc/indent-code.el.in

@@ -1,7 +1,8 @@
 #!@EMACS@ --script
-;;; indent-package.el --- Run Emacs to indent a package definition.
+;;; indent-code.el --- Run Emacs to indent a package definition.
 
 ;; Copyright © 2017 Alex Kost <alezost@gmail.com>
+;; Copyright © 2017 Ludovic Courtès <ludo@gnu.org>
 
 ;; This file is part of GNU Guix.
 
@@ -20,8 +21,8 @@
 
 ;;; Commentary:
 
-;; This scripts indents the given package definition in the specified file
-;; using Emacs.
+;; This scripts indents the given file or package definition in the specified
+;; file using Emacs.
 
 ;;; Code:
 
@@ -35,6 +36,7 @@
 
 (pcase command-line-args-left
   (`(,file-name ,package-name)
+   ;; Indent the definition of PACKAGE-NAME in FILE-NAME.
    (find-file file-name)
    (goto-char (point-min))
    (if (re-search-forward (concat "^(define\\(-public\\) +"
@@ -47,7 +49,14 @@
          (message "Done!"))
      (error "Package '%s' not found in '%s'"
             package-name file-name)))
+  (`(,file-name)
+   ;; Indent all of FILE-NAME.
+   (find-file file-name)
+   (let ((indent-tabs-mode nil))
+     (indent-region (point-min) (point-max))
+     (save-buffer)
+     (message "Done!")))
   (x
-   (error "Usage: indent-package.el FILE PACKAGE")))
+   (error "Usage: indent-code.el FILE [PACKAGE]")))
 
-;;; indent-package.el ends here
+;;; indent-code.el ends here