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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)
#:use-module ((guix git) #:select (url-cache-directory))
#:use-module (guix scripts)
#:use-module (guix scripts pull)
#:use-module (guix ui)
#:use-module (ice-9 format)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-19)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-37)
#:export (guix-git-log))
(define %formats
'("oneline" "medium" "full"))
(define %options
(list (option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '("channel-cache-path") #f #t
(lambda (opt name arg result)
(alist-cons 'channel-cache-path
(if arg (string->symbol arg) 'guix)
result)))
(option '("format") #t #f
(lambda (opt name arg result)
(unless (member arg %formats)
(leave (G_ "~a: invalid format~%") arg))
(alist-cons 'format (string->symbol arg) 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_ "
--channel-cache-path[=CHANNEL]
show checkout path from CHANNEL"))
(display (G_ "
--format=FORMAT show log according to FORMAT"))
(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-channel-cache-path channel)
(define channels (channel-list '()))
(let ((found-channel (find (lambda (element)
(equal? channel (channel-name element)))
channels)))
(if found-channel
(format #t "~a~%" (url-cache-directory (channel-url found-channel)))
(leave (G_ "~a: channel not found~%") (symbol->string channel)))))
(define commit-short-id
(compose (cut string-take <> 7) oid->string commit-id))
;; --oneline = show-commit 'oneline #t
(define (show-commit commit fmt abbrev-commit)
(match fmt
('oneline
(format #t "~a ~a~%"
(if abbrev-commit
(commit-short-id commit)
(oid->string (commit-id commit)))
(commit-summary commit)))
('medium
(let ((author (commit-author commit))
(merge-commit (if (> (commit-parentcount commit) 1) #t #f)))
(format #t "commit ~a~[~%Merge:~]~{ ~a~}~%Author: ~a <~a>~%Date: ~a~%~%~a~%"
(if abbrev-commit
(commit-short-id commit)
(oid->string (commit-id commit)))
(if merge-commit 0 1) ;; show "Merge:"
(if merge-commit (map commit-short-id (commit-parents commit)) '())
(signature-name author)
(signature-email author)
(date->string
(time-utc->date
(make-time time-utc 0
(time-time (signature-when author)))
(* 60 (time-offset (signature-when author))))
"~a ~b ~e ~H:~M:~S ~Y ~z")
(commit-message commit))))
('full
(let ((merge-commit (if (> (commit-parentcount commit) 1) #t #f))
(author (commit-author commit))
(committer (commit-committer commit)))
(format #t "commit ~a~[~%Merge:~]~{ ~a~}~%Author: ~a <~a>~%Commit: ~a <~a>~%~%~a~%"
(if abbrev-commit
(commit-short-id commit)
(oid->string (commit-id commit)))
(if merge-commit 0 1) ;; show "Merge:"
(if merge-commit (map commit-short-id (commit-parents commit)) '())
(signature-name author)
(signature-email author)
(signature-name committer)
(signature-email committer)
(commit-message commit))))))
;; returns a list of commits from path
(define (get-commits path)
(let* ((repository (repository-open path))
(latest-commit (commit-lookup repository (reference-target (repository-head repository)))))
(define commits (let loop ((commit latest-commit)
(res (list latest-commit)))
(match (commit-parents commit)
(() (reverse res))
((head . tail)
(loop head (cons head res))))))
commits))
(define (guix-git-log . args)
(define options
(parse-command-line args %options (list %default-options)))
(let ((channel-cache (assoc-ref options 'channel-cache-path))
(oneline? (assoc-ref options 'oneline?))
(format-type (assoc-ref options 'format)))
(with-error-handling
(cond
(channel-cache
(show-channel-cache-path channel-cache))
(oneline?
(let ((cache (url-cache-directory (channel-url %default-guix-channel))))
(for-each (lambda (commit-list)
(show-commit commit-list 'oneline #t))
(take (get-commits cache) 5))))
(format-type
(let ((cache (url-cache-directory (channel-url %default-guix-channel))))
(for-each (lambda (commit-list)
(show-commit commit-list format-type #f))
(take (get-commits cache) 5))))))))
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