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etc/committer: Support custom commit messages. 

Allow custom change commit messages by supplying a commit message and
optionally a changelog message as arguments.

* etc/committer.scm.in (break-string-with-newlines)
(custom-commit-message): New procedures.
(main)[change-commit-message*]: New sub-procedure. Use them.
(main): Use it.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Sarah Morgensen 2021-07-31 14:00:42 -07:00 committed by Ludovic Courtès
parent 75e117bac7
commit 73177859bc
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1 changed files with 49 additions and 6 deletions
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51
etc/committer.scm.in
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@ -4,6 +4,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020, 2021 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2021 Sarah Morgensen <iskarian@mgsn.dev>
;;;
;;; This file is part of GNU Guix.
;;;
@ -36,6 +37,7 @@
(ice-9 popen)
(ice-9 match)
(ice-9 rdelim)
(ice-9 regex)
(ice-9 textual-ports)
(guix gexp))
@ -66,6 +68,13 @@ Return a single string."
(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."
@ -253,6 +262,32 @@ corresponding to the top-level definition containing the staged changes."
"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 (group-hunks-by-sexp hunks)
"Return a list of pairs associating all hunks with the S-expression they are
modifying."
@ -281,6 +316,15 @@ modifying."
(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)))
@ -326,11 +370,10 @@ modifying."
(error "Cannot apply")))
(usleep %delay))
hunks)
(change-commit-message (hunk-file-name (first hunks))
old new
(current-output-port))
(change-commit-message* (hunk-file-name (first hunks))
old new)
(let ((port (open-pipe* OPEN_WRITE "git" "commit" "-F" "-")))
(change-commit-message (hunk-file-name (first hunks))
(change-commit-message* (hunk-file-name (first hunks))
old new
port)
(usleep %delay)