43 lines
1.1 KiB
Bash
43 lines
1.1 KiB
Bash
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#!/bin/bash
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# Copyright (c) 2010 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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about="Given a grep expression, creates a graph of occurrences of that
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expression in the recent history of the tree.
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Prerequisites: git and GNU R (apt-get install r-base).
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"
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set -e
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target="$1"
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if [ -z $target ]; then
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echo "usage: $0 <grep-compatible expression>"
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echo
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echo "$about"
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exit 1
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fi
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datafile=$(mktemp -t tmp.XXXXXXXXXX)
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trap "rm -f $datafile" EXIT
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echo 'ago count' > $datafile
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for ago in {90..0}; do
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commit=$(git rev-list -1 --until="$ago days ago" origin/trunk)
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git checkout -q -f $commit
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count=$(git grep -E "$target" -- '*.cc' '*.h' '*.m' '*.mm' | wc -l)
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echo "-$ago $count" >> $datafile
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echo -n '.'
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done
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R CMD BATCH <(cat <<EOF
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data = read.delim("$datafile", sep=' ')
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png(width=600, height=300)
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plot(count ~ ago, type="l", main="$target", xlab='days ago', data=data)
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EOF
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) /dev/null
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echo done. # Primarily to add a newline after all the dots.
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