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# (Re)compute version from git repostitory
# Copyright (C) 2009 Free Software Foundation, Inc.
#
# Copying and distribution of this file, with or without modification,
# in any medium, are permitted without royalty provided the copyright
# notice and this notice are preserved.
# The version generated is of the form TAG[-SHORTREF[-dirty]], with
# TAG being the closest tag to the current version and SHORTREF being
# the first 8 hex digits of the the SHA-1 hash of HEAD. If there are
# local changes in the repository, -dirty is added.
version=$1
if git rev-parse --verify HEAD >/dev/null 2>/dev/null \
&& test -z "`git rev-parse --show-cdup`" ; then
set -- `git describe --tags HEAD 2> /dev/null || \
git rev-parse --short HEAD` \
`git update-index --refresh --unmerged > /dev/null
if git diff-index --name-only HEAD | read dummy; then
echo -dirty
fi`
if test "`expr substr $1 1 1`" = v ; then
set -- "`expr substr $1 2 \( length $1 - 1 \)`" $2
fi
echo $1$2 > .$version.tmp
if test ! -e $version \
|| ! cmp -s .$version.tmp $version ; then
mv .$version.tmp $version
else
rm -f .$version.tmp
fi
fi
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