1 #!/bin/bash 2 # Copyright (c) 2010 The Chromium Authors. All rights reserved. 3 # Use of this source code is governed by a BSD-style license that can be 4 # found in the LICENSE file. 5 6 about="Given a grep expression, creates a graph of occurrences of that 7 expression in the recent history of the tree. 8 9 Prerequisites: git and GNU R (apt-get install r-base). 10 " 11 12 set -e 13 14 target="$1" 15 16 if [ -z $target ]; then 17 echo "usage: $0 <grep-compatible expression>" 18 echo 19 echo "$about" 20 exit 1 21 fi 22 23 datafile=$(mktemp -t tmp.XXXXXXXXXX) 24 trap "rm -f $datafile" EXIT 25 26 echo 'ago count' > $datafile 27 for ago in {90..0}; do 28 commit=$(git rev-list -1 --until="$ago days ago" origin/trunk) 29 git checkout -q -f $commit 30 count=$(git grep -E "$target" -- '*.cc' '*.h' '*.m' '*.mm' | wc -l) 31 echo "-$ago $count" >> $datafile 32 echo -n '.' 33 done 34 35 R CMD BATCH <(cat <<EOF 36 data = read.delim("$datafile", sep=' ') 37 png(width=600, height=300) 38 plot(count ~ ago, type="l", main="$target", xlab='days ago', data=data) 39 EOF 40 ) /dev/null 41 42 echo done. # Primarily to add a newline after all the dots. 43
