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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020 Magali Lemes <magalilemes00@gmail.com>
;;;
;;; 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/>.
(define-module (guix scripts git log)
#:use-module (git)
#:use-module ((guix channels)
#:select (%default-guix-channel
channel-url))
#:use-module ((guix git) #:select (url-cache-directory))
#:use-module (guix scripts)
#:use-module (guix ui)
#:use-module (ice-9 format)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-37)
#:export (guix-git-log))
(define %options
(list (option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '("checkout-path") #f #f
(lambda (opt name arg result)
(alist-cons 'checkout-path? #t result)))
(option '("oneline") #f #f
(lambda (opt name arg result)
(alist-cons 'oneline? #t result)))))
(define %default-options
'())
(define (show-help)
(display (G_ "Usage: guix git log [OPTIONS...]
Show Guix commit logs.\n"))
(display (G_ "
--checkout-path show checkout path"))
(display (G_ "
--oneline show short hash and summary of five first commits"))
(display (G_ "
-h, --help display this help and exit"))
(newline)
(show-bug-report-information))
(define (show-checkout-path)
(display (url-cache-directory (channel-url %default-guix-channel)))
(newline))
(define commit-short-id
(compose (cut string-take <> 7) oid->string commit-id))
(define (show-commit commit)
(format #t (G_ "~a ~a~%") (commit-short-id commit) (commit-summary commit)))
;; currently showing 5 latest commits
(define (get-commits path)
(let* ((repository (repository-open path))
(latest-commit (commit-lookup repository (reference-target (repository-head repository)))))
(for-each show-commit (take
(let loop ((commit latest-commit)
(res (list latest-commit)))
(match (commit-parents commit)
(() (reverse res))
((head . tail)
(loop head (cons head res)))))
5))))
(define (guix-git-log . args)
(define options
(parse-command-line args %options (list %default-options)))
(let ((checkout-path? (assoc-ref options 'checkout-path?))
(oneline? (assoc-ref options 'oneline?)))
(with-error-handling
(cond
(checkout-path?
(show-checkout-path))
(oneline?
(let ((cache (url-cache-directory (channel-url %default-guix-channel))))
(get-commits cache)))))))
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