syncevolution/build/gen-git-version.sh

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#! /bin/sh
# This scripts takes current version as a parameter, generates the version
# and prints it to standard output - this way it is usable with m4_esyscmd,
# which can be used inside AC_INIT. The script will print the passed version if
# the following checks pass:
# - SyncEvolution source is clean (git status reports
# no "modified" files or "untracked" files, or the source
# is not in git at all)
# - the source is tagged with the version of SyncEvolution
# (git describe --tags HEAD reports something which matches,
# for example syncevolution-1-0-beta-2a for 1.0beta2a)
# - same for libsynthesis, if the SYNTHESISSRC env variable
# is set
#
# If these tests fail, the version is extended:
# +<yyyymmdd>+SE+<status>+SYSYNC+<status>
# <yyyymmdd> = date
# <status> = <hash>[+unclean]
# <hash> = shortened hash from describe (for example, 1040ffd)
# +unclean = source was dirty
set -e
version="$1"
checksource ()
{
dir=$1
force=$2
dirty=
if [ ! -d $dir/.git ]; then
return
fi
cur=`pwd`
cd $dir
if git status | grep -e "modified:" -e "Untracked files:" -q; then
dirty='+unclean'
fi
describe=`git describe --tags`
hash=`cat .git/HEAD | sed -e 's/ref: //'`
if [ "`echo $hash | sed -e 's/[0-9a-fA-F]//g'`" ] ; then
# contains other characters than simple hex, probably a reference:
# convert to abbreviated hash
hash=`git show-ref --abbrev --hash --verify $hash`
else
# already a hash, abbreviate
hash=`echo $hash | sed -e 's/\(......\).*/\1/'`
fi
if git show-ref --tags | grep -q $hash; then
# there is at least one tag matching HEAD;
# pick the most recent one (based on lexical sorting)
exact=1
tag=`git show-ref --tags | grep $hash | sort | tail -1 | sed -e 's;.*refs/tags/;;'`
else
# Detect -<number of changes>-g<hash> suffix added when tag is older than HEAD.
# Remove suffix to get tag (doesn't matter if we do not pick
# the most recent one).
exact=
tag=`echo $describe | sed -e 's/-[0123456789]*-g.*//'`
fi
simpletag=$tag
# Hyphens between numbers in the tag are dots in the version
# and all other hyphens can be removed.
while true; do
tmp=`echo $simpletag | sed -e 's/\([0123456789]\)-\([0123456789]\)/\1.\2/'`
if [ $tmp = $simpletag ]; then
break
else
simpletag=$tmp
fi
done
simpletag=`echo $simpletag | sed -e 's/-//g'`
if [ "$dirty" ] || [ "$force" ]; then
# previous check failed, always print hash
echo $hash$dirty
elif [ "$exact" ] &&
echo $simpletag | grep -q "syncevolution${version}\$"; then
true
else
echo $hash$dirty
fi
cd $cur
}
versionsuffix=''
syncevo=`checksource .`
if [ "$SYNTHESISSRC" ]; then
sysync=`checksource $SYNTHESISSRC $syncevo`
fi
# run check again, to get hash when only libsynthesis failed
syncevo=`checksource . $sysync`
if [ "$syncevo" ]; then
versionsuffix="+SE+$syncevo"
fi
if [ "$sysync" ]; then
versionsuffix="$versionsuffix+SYSYNC+$sysync"
fi
if [ "$versionsuffix" ]; then
versionsuffix="+`date +%Y%m%d`$versionsuffix"
fi
# using printf, because echo -n is not portable. hopefully printf is.
printf %s "$version$versionsuffix"