CVS branch name from tag name
I have a number of modules in CVS with different tags. How would I go about getting the name of the branch these tagged files exist on? I've tried checking out a file from the module using cvs co -r TAG
and then doing cvs log
but it appears to give me a list of all of the branches that the file exists on, rather than just a single branch name.
Also this needs to be an au开发者_JS百科tomated process, so I can't use web based tools like viewvc to gather this info.
I have the following Korn functions that you might be able to adjust to run in bash. It should be apparent what it's doing.
Use get_ver()
to determine the version number for a file path and given tag. Then pass the file path and version number to get_branch_name()
. The get_branch_name()
function relies on a few other helpers to fetch information and slice up the version numbers.
get_ver()
{
typeset FILE_PATH=$1
typeset TAG=$2
TEMPINFO=/tmp/cvsinfo$$
/usr/local/bin/cvs rlog -r$TAG $FILE_PATH 1>$TEMPINFO 2>/dev/null
VER_LINE=`grep "^revision" $TEMPINFO | awk '{print $2}'`
echo ${VER_LINE:-NONE}
rm -Rf $TEMPINFO 2>/dev/null 1>&2
}
get_branch_name()
{
typeset FILE=$1
typeset VER=$2
BRANCH_TYPE=`is_branch $VER`
if [[ $BRANCH_TYPE = "BRANCH" ]]
then
BRANCH_ID=`get_branch_id $VER`
BRANCH_NAME=`get_tags $FILE $BRANCH_ID`
echo $BRANCH_NAME
else
echo $BRANCH_TYPE
fi
}
get_minor_ver()
{
typeset VER=$1
END=`echo $VER | sed 's/.*\.\([0-9]*\)/\1/g'`
echo $END
}
get_major_ver()
{
typeset VER=$1
START=`echo $VER | sed 's/\(.*\.\)[0-9]*/\1/g'`
echo $START
}
is_branch()
{
typeset VER=$1
# We can work out if something is branched by looking at the version number.
# If it has only two parts (i.e. 1.123) then it's on the trunk
# If it has more parts (i.e. 1.2.2.4) then it's on the branch
# We can error detect if it has an odd number of parts
POINTS=`echo $VER | tr -dc "." | wc -c | awk '{print $1}'`
PARTS=$(($POINTS + 1))
if [[ $PARTS -eq 2 ]]
then
print "TRUNK"
elif [[ $(($PARTS % 2)) -eq 0 ]]
then
print "BRANCH"
else
print "ERROR"
fi
}
get_branch_id()
{
typeset VER=$1
MAJOR_VER=`get_major_ver $VER`
MAJOR_VER=${MAJOR_VER%.}
BRANCH_NUMBER=`get_minor_ver $MAJOR_VER`
BRANCH_POINT=`get_major_ver $MAJOR_VER`
echo ${BRANCH_POINT}0.${BRANCH_NUMBER}
}
get_tags()
{
typeset FILE_PATH=$1
typeset VER=$2
TEMP_TAGS_INFO=/tmp/cvsinfo$$
cvs rlog -r$VER $FILE_PATH 1>${TEMP_TAGS_INFO} 2>/dev/null
TEMPTAGS=`sed -n '/symbolic names:/,/keyword substitution:/p' ${TEMP_TAGS_INFO} | grep ": ${VER}$" | cut -d: -f1 | awk '{print $1}'`
TAGS=`echo $TEMPTAGS | tr ' ' '/'`
echo ${TAGS:-NONE}
rm -Rf $TEMP_TAGS_INFO 2>/dev/null 1>&2
}
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