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#!/bin/sh
# Check the format of GNU Emacs change log entries.
# Copyright 2014 Free Software Foundation, Inc.
# This file is part of GNU Emacs.
# GNU Emacs 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 Emacs 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 Emacs. If not, see <http://www.gnu.org/licenses/>.
# Written by Paul Eggert.
# Use a UTF-8 locale if available, so that the UTF-8 check works.
# Use U+00A2 CENT SIGN to test whether the locale works.
cent_sign_utf8_octal='\302\242'
at_sign=`
printf "${cent_sign_utf8_octal}@" |
awk '{print substr($0, 2)}' 2>/dev/null
`
if test "$at_sign" != @; then
at_sign=`
printf "${cent_sign_utf8_octal}@" |
LC_ALL=en_US.utf8 awk '{print substr($0, 2)}' 2>/dev/null
`
if test "$at_sign" = @; then
LC_ALL=en_US.utf8; export LC_ALL
fi
fi
# Check the log entry.
exec awk '
/^#/ { next }
!/^.*$/ {
print "Invalid character (not UTF-8)"
status = 1
}
nlines == 0 && !/[^[:space:]]/ { next }
{ nlines++ }
nlines == 1 && /^[[:space:]]/ {
print "White space at start of first line"
status = 1
}
nlines == 2 && /[^[:space:]]/ {
print "Nonempty second line"
status = 1
}
/[[:cntrl:]]/ {
print "Text contains control character; please use spaces instead of tabs"
status = 1
}
72 < length && /[[:space:]]/ {
print "Line longer than 72 characters"
status = 1
}
140 < length {
print "Word longer than 140 characters"
status = 1
}
/^Signed-off-by: / {
print "'Signed-off-by:' present"
status = 1
}
END {
if (nlines == 0) {
print "Empty change log entry"
status = 1
}
exit status
}
' <"$1"
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