405 lines
16 KiB
Scheme
Executable File
405 lines
16 KiB
Scheme
Executable File
#!@GUILE@ \
|
|
--no-auto-compile -s
|
|
!#
|
|
|
|
;;; GNU Guix --- Functional package management for GNU
|
|
;;; Copyright © 2020, 2021 Ricardo Wurmus <rekado@elephly.net>
|
|
;;; Copyright © 2021 Sarah Morgensen <iskarian@mgsn.dev>
|
|
;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz>
|
|
;;;
|
|
;;; 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-2)
|
|
(srfi srfi-9)
|
|
(srfi srfi-11)
|
|
(srfi srfi-26)
|
|
(ice-9 format)
|
|
(ice-9 popen)
|
|
(ice-9 match)
|
|
(ice-9 rdelim)
|
|
(ice-9 regex)
|
|
(ice-9 textual-ports)
|
|
(guix gexp))
|
|
|
|
(define* (break-string str #:optional (max-line-length 70))
|
|
"Break the string STR into lines that are no longer than MAX-LINE-LENGTH.
|
|
Return a single string."
|
|
(define (restore-line words)
|
|
(string-join (reverse words) " "))
|
|
(if (<= (string-length str) max-line-length)
|
|
str
|
|
(let ((words+lengths (map (lambda (word)
|
|
(cons word (string-length word)))
|
|
(string-tokenize str))))
|
|
(match (fold (match-lambda*
|
|
(((word . length)
|
|
(count current lines))
|
|
(let ((new-count (+ count length 1)))
|
|
(if (< new-count max-line-length)
|
|
(list new-count
|
|
(cons word current)
|
|
lines)
|
|
(list length
|
|
(list word)
|
|
(cons (restore-line current) lines))))))
|
|
'(0 () ())
|
|
words+lengths)
|
|
((_ last-words lines)
|
|
(string-join (reverse (cons (restore-line last-words) lines))
|
|
"\n"))))))
|
|
|
|
(define* (break-string-with-newlines str #:optional (max-line-length 70))
|
|
"Break the lines of string STR into lines that are no longer than
|
|
MAX-LINE-LENGTH. Return a single string."
|
|
(string-join (map (cut break-string <> max-line-length)
|
|
(string-split str #\newline))
|
|
"\n"))
|
|
|
|
(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-lines
|
|
definition?)
|
|
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-lines hunk-diff-lines)
|
|
;; Does this hunk add a definition?
|
|
(definition? hunk-definition?))
|
|
|
|
(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
|
|
(string-join (hunk-diff-lines hunk) ""))))
|
|
|
|
(define (diff-info)
|
|
"Read the diff and return a list of <hunk> values."
|
|
(let ((port (open-pipe* OPEN_READ
|
|
"git" "diff-files"
|
|
"--no-prefix"
|
|
;; Only include one context line to avoid lumping in
|
|
;; new definitions with changes to existing
|
|
;; definitions.
|
|
"--unified=1"
|
|
"gnu")))
|
|
(define (extract-line-number line-tag)
|
|
(abs (string->number
|
|
(car (string-split line-tag #\,)))))
|
|
(define (read-hunk)
|
|
(let loop ((lines '())
|
|
(definition? #false))
|
|
(let ((line (read-line port 'concat)))
|
|
(cond
|
|
((eof-object? line)
|
|
(values (reverse lines) definition?))
|
|
((or (string-prefix? "@@ " line)
|
|
(string-prefix? "diff --git" line))
|
|
(unget-string port line)
|
|
(values (reverse lines) definition?))
|
|
(else
|
|
(loop (cons line lines)
|
|
(or definition?
|
|
(string-prefix? "+(define" line))))))))
|
|
(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 . _)
|
|
(let-values
|
|
(((diff-lines definition?) (read-hunk)))
|
|
(loop (cons (make-hunk file-name
|
|
(extract-line-number old-start)
|
|
(extract-line-number new-start)
|
|
(cons (string-append line "\n")
|
|
diff-lines)
|
|
definition?) acc)
|
|
file-name)))))
|
|
(else (loop acc file-name))))))
|
|
(close-pipe port)
|
|
info))
|
|
|
|
(define (lines-to-first-change hunk)
|
|
"Return the number of diff lines until the first change."
|
|
(1- (count (lambda (line)
|
|
((negate char-set-contains?)
|
|
(char-set #\+ #\-)
|
|
(string-ref line 0)))
|
|
(hunk-diff-lines hunk))))
|
|
|
|
(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" "cat-file" "-p" (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
|
|
(+ (lines-to-first-change hunk)
|
|
(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
|
|
(+ (lines-to-first-change hunk)
|
|
(hunk-new-line-number hunk))))))
|
|
|
|
(define* (change-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 equal? old-values new-values))
|
|
(added (lset-difference equal? new-values old-values)))
|
|
(format port
|
|
"[~a]: ~a~%" field
|
|
(break-string
|
|
(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* (add-commit-message file-name variable-name #:optional (port (current-output-port)))
|
|
"Print ChangeLog commit message for a change to FILE-NAME adding a definition."
|
|
(format port
|
|
"gnu: Add ~a.~%~%* ~a (~a): New variable.~%"
|
|
variable-name file-name variable-name))
|
|
|
|
(define* (custom-commit-message file-name variable-name message changelog
|
|
#:optional (port (current-output-port)))
|
|
"Print custom commit message for a change to VARIABLE-NAME in FILE-NAME, using
|
|
MESSAGE as the commit message and CHANGELOG as the body of the ChangeLog
|
|
entry. If CHANGELOG is #f, the commit message is reused. If CHANGELOG already
|
|
contains ': ', no colon is inserted between the location and body of the
|
|
ChangeLog entry."
|
|
(define (trim msg)
|
|
(string-trim-right (string-trim-both msg) (char-set #\.)))
|
|
|
|
(define (changelog-has-location? changelog)
|
|
(->bool (string-match "^[[:graph:]]+:[[:blank:]]" changelog)))
|
|
|
|
(let* ((message (trim message))
|
|
(changelog (if changelog (trim changelog) message))
|
|
(message/f (format #f "gnu: ~a: ~a." variable-name message))
|
|
(changelog/f (if (changelog-has-location? changelog)
|
|
(format #f "* ~a (~a)~a."
|
|
file-name variable-name changelog)
|
|
(format #f "* ~a (~a): ~a."
|
|
file-name variable-name changelog))))
|
|
(format port
|
|
"~a~%~%~a~%"
|
|
(break-string-with-newlines message/f 72)
|
|
(break-string-with-newlines changelog/f 72))))
|
|
|
|
(define (add-copyright-line line)
|
|
"Add the copyright line on LINE to the previous commit."
|
|
(let ((author (match:substring
|
|
(string-match "^\\+;;; Copyright ©[^[:alpha:]]+(.*)$" line)
|
|
1)))
|
|
(format
|
|
(current-output-port) "Amend and add copyright line for ~a~%" author)
|
|
(system* "git" "commit" "--amend" "--no-edit")))
|
|
|
|
(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 %delay 1000)
|
|
|
|
(define (main . args)
|
|
(define* (change-commit-message* file-name old new #:rest rest)
|
|
(let ((changelog #f))
|
|
(match args
|
|
((or (message changelog) (message))
|
|
(apply custom-commit-message
|
|
file-name (second old) message changelog rest))
|
|
(_
|
|
(apply change-commit-message file-name old new rest)))))
|
|
|
|
(match (diff-info)
|
|
(()
|
|
(display "Nothing to be done.\n" (current-error-port)))
|
|
(hunks
|
|
(let-values
|
|
(((definitions changes)
|
|
(partition hunk-definition? hunks)))
|
|
|
|
;; Additions.
|
|
(for-each (lambda (hunk)
|
|
(and-let*
|
|
((define-line (find (cut string-prefix? "+(define" <>)
|
|
(hunk-diff-lines hunk)))
|
|
(variable-name (and=> (string-tokenize define-line) second)))
|
|
(add-commit-message (hunk-file-name hunk) variable-name)
|
|
(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")))
|
|
|
|
(let ((port (open-pipe* OPEN_WRITE "git" "commit" "-F" "-")))
|
|
(add-commit-message (hunk-file-name hunk)
|
|
variable-name port)
|
|
(usleep %delay)
|
|
(unless (eqv? 0 (status:exit-val (close-pipe port)))
|
|
(error "Cannot commit"))))
|
|
(usleep %delay))
|
|
definitions)
|
|
|
|
;; Changes.
|
|
(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")))
|
|
(usleep %delay))
|
|
hunks)
|
|
(define copyright-line
|
|
(any (lambda (line) (and=> (string-prefix? "+;;; Copyright ©" line)
|
|
(const line)))
|
|
(hunk-diff-lines (first hunks))))
|
|
(cond
|
|
(copyright-line
|
|
(add-copyright-line copyright-line))
|
|
(else
|
|
(let ((port (open-pipe* OPEN_WRITE "git" "commit" "-F" "-")))
|
|
(change-commit-message* (hunk-file-name (first hunks))
|
|
old new)
|
|
(change-commit-message* (hunk-file-name (first hunks))
|
|
old new
|
|
port)
|
|
(usleep %delay)
|
|
(unless (eqv? 0 (status:exit-val (close-pipe port)))
|
|
(error "Cannot commit")))))))
|
|
;; XXX: we recompute the hunks here because previous
|
|
;; insertions lead to offsets.
|
|
(new+old+hunks (diff-info)))))))
|
|
|
|
(apply main (cdr (command-line)))
|