Mike's Blabberings

#!/bin/bash
if [ -z "$1" ]; then
    echo "usage: $0 revision"
    exit
fi
 
REV=$1
 
# Execute a svn diff on the revision, and search the output for deleted lines
# (begin with a '-', but aren't followed by another immediately),
# and likewise with any added lines
DIFF="$(svn diff -c $REV --diff-cmd=/usr/bin/diff)"
DEL_COUNTS=$(echo -e "$DIFF" | egrep '^[-][^-]' | wc -lm)
ADD_COUNTS=$(echo -e "$DIFF" | egrep '^[+][^+]' | wc -lm)
 
function get_field {
    # given an input string with 2 fields delimited by spaces, possibly with
    # leading whitespace, return the field in the position specified.
    # so,  `get_field "   123   45678" 1`  would return "122"
    # and  `get_field "   123   45678" 2`  would return "45678"
    INPUT=$1
    POSITION=$2
    echo $INPUT | sed "s/^[ ]*\([0-9]*\)[ ]*\([0-9]*\)/\\$POSITION/g"
}
 
DEL_LINES=$(get_field "$DEL_COUNTS" 1)
DEL_CHARS=$(get_field "$DEL_COUNTS" 2)
 
ADD_LINES=$(get_field "$ADD_COUNTS" 1)
ADD_CHARS=$(get_field "$ADD_COUNTS" 2)
 
echo "Removed $DEL_LINES lines ($DEL_CHARS characters)"
echo "Added $ADD_LINES lines ($ADD_CHARS characters)"

$ svnstat 61765
Removed 113 lines (4913 characters)
Added 63 lines (2975 characters)