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authorOleg Pykhalov <go.wigust@gmail.com>2018-11-21 16:47:43 +0300
committerOleg Pykhalov <go.wigust@gmail.com>2018-11-22 21:17:54 +0300
commit81a40ee0cb925bc39e3044bddcfdd38ddb04f04d (patch)
tree725d064c1c4af2af90da75bbb3fd55aad9db750c
parent8548f995494d8d6358e6a8d7bc3b3bb5a0cbecb5 (diff)
downloadguix-81a40ee0cb925bc39e3044bddcfdd38ddb04f04d.tar
guix-81a40ee0cb925bc39e3044bddcfdd38ddb04f04d.tar.gz
describe: Add json format.
* guix/scripts/describe.scm (channel->json): New procedure. (display-checkout-info, display-profile-info): Use this. (%options): Add 'json' option. * doc/guix.texi (Invoking guix describe): Document this.
-rw-r--r--doc/guix.texi5
-rw-r--r--guix/scripts/describe.scm19
2 files changed, 20 insertions, 4 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 082e81bf7c..3413eb30f2 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -3273,7 +3273,10 @@ produce human-readable output;
@item channels
produce a list of channel specifications that can be passed to @command{guix
pull -C} or installed as @file{~/.config/guix/channels.scm} (@pxref{Invoking
-guix pull}).
+guix pull});
+@item json
+@cindex JSON
+produce a list of channel specifications in JSON format.
@end table
@item --profile=@var{profile}
diff --git a/guix/scripts/describe.scm b/guix/scripts/describe.scm
index 21b4c71526..0bfd983f1b 100644
--- a/guix/scripts/describe.scm
+++ b/guix/scripts/describe.scm
@@ -25,6 +25,7 @@
#:use-module (guix profiles)
#:use-module ((guix scripts pull) #:select (display-profile-content))
#:use-module (git)
+ #:use-module (json)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-37)
#:use-module (ice-9 match)
@@ -40,7 +41,7 @@
;; Specifications of the command-line options.
(list (option '(#\f "format") #t #f
(lambda (opt name arg result)
- (unless (member arg '("human" "channels"))
+ (unless (member arg '("human" "channels" "json"))
(leave (G_ "~a: unsupported output format~%") arg))
(alist-cons 'format (string->symbol arg) result)))
(option '(#\p "profile") #t #f
@@ -92,6 +93,11 @@ Display information about the channels currently in use.\n"))
(url ,(channel-url channel))
(commit ,(channel-commit channel))))
+(define (channel->json channel)
+ (scm->json-string `((name . ,(channel-name channel))
+ (url . ,(channel-url channel))
+ (commit . ,(channel-commit channel)))))
+
(define* (display-checkout-info fmt #:optional directory)
"Display information about the current checkout according to FMT, a symbol
denoting the requested format. Exit if the current directory does not lie
@@ -114,7 +120,12 @@ within a Git checkout."
('channels
(pretty-print `(list ,(channel->sexp (channel (name 'guix)
(url (dirname directory))
- (commit commit)))))))
+ (commit commit))))))
+ ('json
+ (display (channel->json (channel (name 'guix)
+ (url (dirname directory))
+ (commit commit))))
+ (newline)))
(display-package-search-path fmt)))
(define (display-profile-info profile fmt)
@@ -153,7 +164,9 @@ in the format specified by FMT."
('human
(display-profile-content profile number))
('channels
- (pretty-print `(list ,@(map channel->sexp channels)))))
+ (pretty-print `(list ,@(map channel->sexp channels))))
+ ('json
+ (format #t "[~a]~%" (string-join (map channel->json channels) ","))))
(display-package-search-path fmt))