mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-11-18 12:47:33 -05:00
250 lines
9.3 KiB
Scheme
Executable file
250 lines
9.3 KiB
Scheme
Executable file
#!@GUILE@ \
|
|
--no-auto-compile -s
|
|
!#
|
|
|
|
;;; GNU Guix --- Functional package management for GNU
|
|
;;; Copyright © 2020 Ricardo Wurmus <rekado@elephly.net>
|
|
;;;
|
|
;;; 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/>.
|
|
|
|
;;; Commentary:
|
|
|
|
;; This script stages and commits changes to package definitions.
|
|
|
|
;;; Code:
|
|
|
|
(import (sxml xpath)
|
|
(srfi srfi-1)
|
|
(srfi srfi-9)
|
|
(ice-9 format)
|
|
(ice-9 popen)
|
|
(ice-9 match)
|
|
(ice-9 rdelim)
|
|
(ice-9 textual-ports))
|
|
|
|
(define (read-excursion port)
|
|
"Read an expression from PORT and reset the port position before returning
|
|
the expression."
|
|
(let ((start (ftell port))
|
|
(result (read port)))
|
|
(seek port start SEEK_SET)
|
|
result))
|
|
|
|
(define (surrounding-sexp port line-no)
|
|
"Return the top-level S-expression surrounding the change at line number
|
|
LINE-NO in PORT."
|
|
(let loop ((i (1- line-no))
|
|
(last-top-level-sexp #f))
|
|
(if (zero? i)
|
|
last-top-level-sexp
|
|
(match (peek-char port)
|
|
(#\(
|
|
(let ((sexp (read-excursion port)))
|
|
(read-line port)
|
|
(loop (1- i) sexp)))
|
|
(_
|
|
(read-line port)
|
|
(loop (1- i) last-top-level-sexp))))))
|
|
|
|
(define-record-type <hunk>
|
|
(make-hunk file-name
|
|
old-line-number
|
|
new-line-number
|
|
diff)
|
|
hunk?
|
|
(file-name hunk-file-name)
|
|
;; Line number before the change
|
|
(old-line-number hunk-old-line-number)
|
|
;; Line number after the change
|
|
(new-line-number hunk-new-line-number)
|
|
;; The full diff to be used with "git apply --cached"
|
|
(diff hunk-diff))
|
|
|
|
(define* (hunk->patch hunk #:optional (port (current-output-port)))
|
|
(let ((file-name (hunk-file-name hunk)))
|
|
(format port
|
|
"diff --git a/~a b/~a~%--- a/~a~%+++ b/~a~%~a"
|
|
file-name file-name file-name file-name
|
|
(hunk-diff hunk))))
|
|
|
|
(define (diff-info)
|
|
"Read the diff and return a list of <hunk> values."
|
|
(let ((port (open-pipe* OPEN_READ
|
|
"git" "diff"
|
|
"--no-prefix"
|
|
;; Do not include any context lines. This makes it
|
|
;; easier to find the S-expression surrounding the
|
|
;; change.
|
|
"--unified=0")))
|
|
(define (extract-line-number line-tag)
|
|
(abs (string->number
|
|
(car (string-split line-tag #\,)))))
|
|
(define (read-hunk)
|
|
(reverse
|
|
(let loop ((lines '()))
|
|
(let ((line (read-line port 'concat)))
|
|
(cond
|
|
((eof-object? line) lines)
|
|
((or (string-prefix? "@@ " line)
|
|
(string-prefix? "diff --git" line))
|
|
(unget-string port line)
|
|
lines)
|
|
(else (loop (cons line lines))))))))
|
|
(define info
|
|
(let loop ((acc '())
|
|
(file-name #f))
|
|
(let ((line (read-line port)))
|
|
(cond
|
|
((eof-object? line) acc)
|
|
((string-prefix? "--- " line)
|
|
(match (string-split line #\space)
|
|
((_ file-name)
|
|
(loop acc file-name))))
|
|
((string-prefix? "@@ " line)
|
|
(match (string-split line #\space)
|
|
((_ old-start new-start . _)
|
|
(loop (cons (make-hunk file-name
|
|
(extract-line-number old-start)
|
|
(extract-line-number new-start)
|
|
(string-join (cons* line "\n"
|
|
(read-hunk)) ""))
|
|
acc)
|
|
file-name))))
|
|
(else (loop acc file-name))))))
|
|
(close-pipe port)
|
|
info))
|
|
|
|
(define (old-sexp hunk)
|
|
"Using the diff information in HUNK return the unmodified S-expression
|
|
corresponding to the top-level definition containing the staged changes."
|
|
;; TODO: We can't seek with a pipe port...
|
|
(let* ((port (open-pipe* OPEN_READ
|
|
"git" "show" (string-append "HEAD:"
|
|
(hunk-file-name hunk))))
|
|
(contents (get-string-all port)))
|
|
(close-pipe port)
|
|
(call-with-input-string contents
|
|
(lambda (port)
|
|
(surrounding-sexp port (hunk-old-line-number hunk))))))
|
|
|
|
(define (new-sexp hunk)
|
|
"Using the diff information in HUNK return the modified S-expression
|
|
corresponding to the top-level definition containing the staged changes."
|
|
(call-with-input-file (hunk-file-name hunk)
|
|
(lambda (port)
|
|
(surrounding-sexp port
|
|
(hunk-new-line-number hunk)))))
|
|
|
|
(define* (commit-message file-name old new #:optional (port (current-output-port)))
|
|
"Print ChangeLog commit message for changes between OLD and NEW."
|
|
(define (get-values expr field)
|
|
(match ((sxpath `(// ,field quasiquote *)) expr)
|
|
(() '())
|
|
((first . rest)
|
|
(map cadadr first))))
|
|
(define (listify items)
|
|
(match items
|
|
((one) one)
|
|
((one two)
|
|
(string-append one " and " two))
|
|
((one two . more)
|
|
(string-append (string-join (drop-right items 1) ", ")
|
|
", and " (first (take-right items 1))))))
|
|
(define variable-name
|
|
(second old))
|
|
(define version
|
|
(and=> ((sxpath '(// version *any*)) new)
|
|
first))
|
|
(format port
|
|
"gnu: ~a: Update to ~a.~%~%* ~a (~a): Update to ~a.~%"
|
|
variable-name version file-name variable-name version)
|
|
(for-each (lambda (field)
|
|
(let ((old-values (get-values old field))
|
|
(new-values (get-values new field)))
|
|
(or (equal? old-values new-values)
|
|
(let ((removed (lset-difference eq? old-values new-values))
|
|
(added (lset-difference eq? new-values old-values)))
|
|
(format port
|
|
"[~a]: ~a~%" field
|
|
(match (list (map symbol->string removed)
|
|
(map symbol->string added))
|
|
((() added)
|
|
(format #f "Add ~a."
|
|
(listify added)))
|
|
((removed ())
|
|
(format #f "Remove ~a."
|
|
(listify removed)))
|
|
((removed added)
|
|
(format #f "Remove ~a; add ~a."
|
|
(listify removed)
|
|
(listify added)))))))))
|
|
'(inputs propagated-inputs native-inputs)))
|
|
|
|
(define (group-hunks-by-sexp hunks)
|
|
"Return a list of pairs associating all hunks with the S-expression they are
|
|
modifying."
|
|
(fold (lambda (sexp hunk acc)
|
|
(match acc
|
|
(((previous-sexp . hunks) . rest)
|
|
(if (equal? sexp previous-sexp)
|
|
(cons (cons previous-sexp
|
|
(cons hunk hunks))
|
|
rest)
|
|
(cons (cons sexp (list hunk))
|
|
acc)))
|
|
(_
|
|
(cons (cons sexp (list hunk))
|
|
acc))))
|
|
'()
|
|
(map new-sexp hunks)
|
|
hunks))
|
|
|
|
(define (new+old+hunks hunks)
|
|
(map (match-lambda
|
|
((new . hunks)
|
|
(cons* new (old-sexp (first hunks)) hunks)))
|
|
(group-hunks-by-sexp hunks)))
|
|
|
|
(define (main . args)
|
|
(match (diff-info)
|
|
(()
|
|
(display "Nothing to be done." (current-error-port)))
|
|
(hunks
|
|
(for-each (match-lambda
|
|
((new old . hunks)
|
|
(for-each (lambda (hunk)
|
|
(let ((port (open-pipe* OPEN_WRITE
|
|
"git" "apply"
|
|
"--cached"
|
|
"--unidiff-zero")))
|
|
(hunk->patch hunk port)
|
|
(unless (eqv? 0 (status:exit-val (close-pipe port)))
|
|
(error "Cannot apply")))
|
|
(sleep 1))
|
|
hunks)
|
|
(commit-message (hunk-file-name (first hunks))
|
|
old new
|
|
(current-output-port))
|
|
(let ((port (open-pipe* OPEN_WRITE "git" "commit" "-F" "-")))
|
|
(commit-message (hunk-file-name (first hunks))
|
|
old new
|
|
port)
|
|
(sleep 1)
|
|
(unless (eqv? 0 (status:exit-val (close-pipe port)))
|
|
(error "Cannot commit")))))
|
|
(new+old+hunks hunks)))))
|
|
|
|
(main)
|