bin/fetchsvn.sh

   1 #!/bin/sh
   2 # Check out or update a SVN repository
   3
   4 URL=$1
   5 DIR=$2
   6 REV=$3
   7 TARBALL=$4
   8
   9 SVNV=`svn --version --quiet`
  10
  11 if [ $? -ne 0 ]; then
  12         echo "You don't have SVN installed."
  13         exit 1
  14 fi
  15
  16 # Simple case - the repository doesn't exist
  17
  18 if [ ! -d $DIR/svn/.svn ]; then
  19         echo "Fetching $URL..."
  20         svn co -r $REV $URL $DIR/svn
  21         if [ $? -ne 0 ]; then
  22                 echo "Couldn't fetch the code from $URL"
  23                 exit 1
  24         fi
  25 else
  26         CURREV=`svn info $DIR/svn | grep "Last Changed Rev" | awk '{ print $4 }'`
  27
  28         if [ $CURREV -ne $REV ]; then
  29                 (cd $DIR/svn; \
  30                 echo "Updating from $CURREV to $REV"
  31                 svn update -r $REV || {
  32                         echo "Couldn't update the repository."
  33                         exit 1
  34                 })
  35                 if [ `echo $?` -ne 0 ]; then
  36                         # The parentheses around the cd $DIR/svn; svn update ... commands above
  37                         # cause those commands to be executed as a list, in a subshell. As a
  38                         # consequence, if something goes wrong the exit command exits the
  39                         # subshell, not the script. And that means that the tar command below was
  40                         # still being executed even if the svn checkout failed, which could lead
  41                         # to nasty, nasty situations where we had a tarball that claimed to be a
  42                         # certain SVN revision, but was really some other revision...
  43                   exit 1
  44                 fi
  45         fi
  46 fi
  47
  48 tar -C $DIR -zcf $TARBALL svn