Show svn info in your bash prompt

gistfile1.sh

# Returns (svn:<revision>:<branch|tag>[*]) if applicable
svn_prompt() {
    if [ -d ".svn" ]; then
        local branch dirty rev info=$(svn info 2>/dev/null)
        
        branch=$(svn_parse_branch "$info")
        
        # Uncomment if you want to display the current revision.
        #rev=$(echo "$info" | awk '/^Revision: [0-9]+/{print $2}')
        
        # Uncomment if you want to display whether the repo is 'dirty.' In some
        # cases (on large repos) this may take a few seconds, which can
        # noticeably delay your prompt after a command executes.
        #[ "$(svn status)" ] && dirty='*'
        
        if [ "$branch" != "" ] ; then
           echo "(svn:$rev:$branch$dirty)"
        fi
    fi
}

# Returns the current branch or tag name from the given `svn info` output
svn_parse_branch() {
    local chunk url=$(echo "$1" | awk '/^URL: .*/{print $2}')
    
    echo $url | grep -q "/trunk\b"
    if [ $? -eq 0 ] ; then
        echo trunk
        return
    else
        chunk=$(echo $url | grep -o "/releases.*")
        if [ "$chunk" == "" ] ; then
            chunk=$(echo $url | grep -o "/branches.*")
            if [ "$chunk" == "" ] ; then
                chunk=$(echo $url | grep -o "/tags.*")
            fi
        fi
    fi
    
    echo $chunk | awk -F/ '{print $3}'
}

export PS1="\w\$(svn_prompt)>"

The following patch enables this to work in subdirectories of your working copy (not just the root). It also fixes the stray colon : between ${rev}:${branch} when you have ${rev} commented out (per OP's default):

@@ -1,25 +1,34 @@
 # Returns (svn:<revision>:<branch|tag>[*]) if applicable
 svn_prompt() {
-    if [[ -d ".svn" ]] ; then
-        local branch dirty rev info=$(svn info 2>/dev/null)
+    if wc=$( svn_metadata_path ); then
+        local branch dirty rev info=$(svn info "${wc}" 2>/dev/null)

         branch=$(svn_parse_branch "${info}")

         # Uncomment if you want to display the current revision.
-        #rev=$(echo "${info}" | awk '/^Revision: [0-9]+/{print $2}')
+        #rev=$(echo "${info}" | awk '/^Revision: [0-9]+/{print $2":"}')

         # Uncomment if you want to display whether the repo is 'dirty.' In some
         # cases (on large repos) this may take a few seconds, which can
         # noticeably delay your prompt after a command executes.
         #[ "$(svn status)" ] && dirty='*'

         if [ "$branch" != "" ] ; then
-            echo "(svn:${rev}:${branch}${dirty})"
+            echo "(svn:${rev}${branch}${dirty})"
         fi
     fi
 }

+svn_metadata_path() {
+    local curr='.'
+    while [ ! -d "${curr}/.svn" ]; do
+        [ "${curr}" != "/" ] || return 1
+        curr=$( realpath "${curr}/.." )
+    done
+    echo "${curr}"
+}
+
 # Returns the current branch or tag name from the given `svn info` output
 svn_parse_branch() {
     local chunk url=$(echo "$1" | awk '/^URL: .*/{print $2}')