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-rw-r--r--Makefile.am1
-rw-r--r--doc/guix.texi28
-rw-r--r--guix/scripts/style.scm65
-rw-r--r--tests/guix-style.sh80
4 files changed, 153 insertions, 21 deletions
diff --git a/Makefile.am b/Makefile.am
index 2cda20e61c..f7c42e8153 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -580,6 +580,7 @@ SH_TESTS = \
tests/guix-package.sh \
tests/guix-package-aliases.sh \
tests/guix-package-net.sh \
+ tests/guix-style.sh \
tests/guix-system.sh \
tests/guix-home.sh \
tests/guix-archive.sh \
diff --git a/doc/guix.texi b/doc/guix.texi
index d6460a785f..9a6a5c307d 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -14058,9 +14058,12 @@ otherwise.
@node Invoking guix style
@section Invoking @command{guix style}
-The @command{guix style} command helps packagers style their package
-definitions according to the latest fashionable trends. The command
-currently provides the following styling rules:
+The @command{guix style} command helps users and packagers alike style
+their package definitions and configuration files according to the
+latest fashionable trends. It can either reformat whole files, with the
+@option{--whole-file} option, or apply specific @dfn{styling rules} to
+individual package definitions. The command currently provides the
+following styling rules:
@itemize
@item
@@ -14115,6 +14118,12 @@ the packages. The @option{--styling} or @option{-S} option allows you
to select the style rule, the default rule being @code{format}---see
below.
+To reformat entire source files, the syntax is:
+
+@example
+guix style --whole-file @var{file}@dots{}
+@end example
+
The available options are listed below.
@table @code
@@ -14122,6 +14131,19 @@ The available options are listed below.
@itemx -n
Show source file locations that would be edited but do not modify them.
+@item --whole-file
+@itemx -f
+Reformat the given files in their entirety. In that case, subsequent
+arguments are interpreted as file names (rather than package names), and
+the @option{--styling} option has no effect.
+
+As an example, here is how you might reformat your operating system
+configuration (you need write permissions for the file):
+
+@example
+guix style -f /etc/config.scm
+@end example
+
@item --styling=@var{rule}
@itemx -S @var{rule}
Apply @var{rule}, one of the following styling rules:
diff --git a/guix/scripts/style.scm b/guix/scripts/style.scm
index 2e14bc68fd..c0b9ea1a28 100644
--- a/guix/scripts/style.scm
+++ b/guix/scripts/style.scm
@@ -330,6 +330,21 @@ PACKAGE."
;;;
+;;; Whole-file formatting.
+;;;
+
+(define* (format-whole-file file #:rest rest)
+ "Reformat all of FILE."
+ (let ((lst (call-with-input-file file read-with-comments/sequence)))
+ (with-atomic-file-output file
+ (lambda (port)
+ (apply pretty-print-with-comments/splice port lst
+ #:format-comment canonicalize-comment
+ #:format-vertical-space canonicalize-vertical-space
+ rest)))))
+
+
+;;;
;;; Options.
;;;
@@ -345,6 +360,9 @@ PACKAGE."
(option '(#\e "expression") #t #f
(lambda (opt name arg result)
(alist-cons 'expression arg result)))
+ (option '(#\f "whole-file") #f #f
+ (lambda (opt name arg result)
+ (alist-cons 'whole-file? #t result)))
(option '(#\S "styling") #t #f
(lambda (opt name arg result)
(alist-cons 'styling-procedure
@@ -400,6 +418,9 @@ Update package definitions to the latest style.\n"))
of 'silent', 'safe', or 'always'"))
(newline)
(display (G_ "
+ -f, --whole-file format the entire contents of the given file(s)"))
+ (newline)
+ (display (G_ "
-h, --help display this help and exit"))
(display (G_ "
-V, --version display version information and exit"))
@@ -426,27 +447,35 @@ Update package definitions to the latest style.\n"))
#:build-options? #f))
(let* ((opts (parse-options))
- (packages (filter-map (match-lambda
- (('argument . spec)
- (specification->package spec))
- (('expression . str)
- (read/eval str))
- (_ #f))
- opts))
(edit (if (assoc-ref opts 'dry-run?)
edit-expression/dry-run
edit-expression))
(style (assoc-ref opts 'styling-procedure))
(policy (assoc-ref opts 'input-simplification-policy)))
(with-error-handling
- (for-each (lambda (package)
- (style package #:policy policy
- #:edit-expression edit))
- ;; Sort package by source code location so that we start editing
- ;; files from the bottom and going upward. That way, the
- ;; 'location' field of <package> records is not invalidated as
- ;; we modify files.
- (sort (if (null? packages)
- (fold-packages cons '() #:select? (const #t))
- packages)
- (negate package-location<?))))))
+ (if (assoc-ref opts 'whole-file?)
+ (let ((files (filter-map (match-lambda
+ (('argument . file) file)
+ (_ #f))
+ opts)))
+ (unless (eq? format-package-definition style)
+ (warning (G_ "'--styling' option has no effect in whole-file mode~%")))
+ (for-each format-whole-file files))
+ (let ((packages (filter-map (match-lambda
+ (('argument . spec)
+ (specification->package spec))
+ (('expression . str)
+ (read/eval str))
+ (_ #f))
+ opts)))
+ (for-each (lambda (package)
+ (style package #:policy policy
+ #:edit-expression edit))
+ ;; Sort package by source code location so that we start
+ ;; editing files from the bottom and going upward. That
+ ;; way, the 'location' field of <package> records is not
+ ;; invalidated as we modify files.
+ (sort (if (null? packages)
+ (fold-packages cons '() #:select? (const #t))
+ packages)
+ (negate package-location<?))))))))
diff --git a/tests/guix-style.sh b/tests/guix-style.sh
new file mode 100644
index 0000000000..58f953a0ec
--- /dev/null
+++ b/tests/guix-style.sh
@@ -0,0 +1,80 @@
+# GNU Guix --- Functional package management for GNU
+# Copyright © 2022 Ludovic Courtès <ludo@gnu.org>
+#
+# This file is part of GNU Guix.
+#
+# GNU Guix is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or (at
+# your option) any later version.
+#
+# GNU Guix is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+#
+# Test 'guix style'.
+#
+
+set -e
+
+guix style --version
+
+tmpdir="guix-style-$$"
+trap 'rm -r "$tmpdir"' EXIT
+
+tmpfile="$tmpdir/os.scm"
+mkdir "$tmpdir"
+cat > "$tmpfile" <<EOF
+;;; This is a header with three semicolons.
+;;;
+
+(define-module (foo bar)
+ #:use-module (guix)
+ #:use-module (gnu))
+
+;; One blank line and a page break.
+
+
+;; And now, the OS.
+(operating-system
+ (host-name "komputilo")
+ (locale "eo_EO.UTF-8")
+
+ ;; User accounts.
+ (users (cons (user-account
+ (name "alice")
+ (comment "Bob's sister")
+ (group "users")
+
+ ;; Groups fit on one line.
+ (supplementary-groups '("wheel" "audio" "video")))
+ %base-user-accounts))
+
+ ;; The services.
+ (services
+ (cons (service mcron-service-type) %base-services)))
+EOF
+
+cp "$tmpfile" "$tmpfile.bak"
+
+initial_hash="$(guix hash "$tmpfile")"
+
+guix style -f "$tmpfile"
+if ! test "$initial_hash" = "$(guix hash "$tmpfile")"
+then
+ cat "$tmpfile"
+ diff -u "$tmpfile.bak" "$tmpfile"
+ false
+fi
+
+# Introduce random changes and try again.
+sed -i "$tmpfile" -e's/ +/ /g'
+! test "$initial_hash" = "$(guix hash "$tmpfile")"
+
+guix style -f "$tmpfile"
+test "$initial_hash" = "$(guix hash "$tmpfile")"