SVN Tag and Branch Lock

Locking SVN Tag

Every branch, tag is a directory in SVN. You have to(can) manipulate the directories as per your requirement. SVN does not provide any in built feature to lock any branch directory (branch, tag).

Here is the script to lock the tags in svn

#tag_lock.sh
#!/bin/sh



#This script is to lock the tags.
#Repos and trasaction must be pased to this script.
REPOS="$1"
TXN="$2"

SVNLOOK=/etc/subversion/bin/svnlook
########################
# Protect tags directory
########################
# Deny transaction if any line writes to tags directory that exists.
# tags dir match pattern
TAGS_REGEX='tags/[^/]\+'
# Get list of transactions in the 'tag' directory
TAGS_CHANGES=`"$SVNLOOK" changed -t "$TXN" "$REPOS" 2>/dev/null | \
                 awk '{ print $2; }' 2>/dev/null | \
                 grep tags/ 2>/dev/null | \
                 sed -e 's!^\($TAGS_REGEX\).*!\1!' | \
                 sort | \
                 uniq`
# Get head revision number
YOUNGEST=`svnlook youngest "$REPOS" 2>/dev/null`
echo $YOUNGEST  >> /tmp/tag.log
# For every line in transaction,
# check to see if directory in tags exists
for CHANGE in $TAGS_CHANGES; do
  # If directory in tags exists, deny transaction
  if svnlook proplist -r $YOUNGEST "$REPOS" "$CHANGE" >/dev/null 2>&1 ;
then
    echo "Cannot modify existing tag: ${tag}" >&2
    exit 1
  fi
done
#######################
# Allow transaction
#######################
exit 0

Thanks to the original writer.

You can change the script to lock any branch instead of tags.