Hacky shell script and gnuplot commands to plot the size of a file across a number of git commits, where the name of the file changes but is pattern-matcheable. y-axis data is unique by date.

gnuplot commands

set xdata time
set timefmt "%Y%m%d"
set offset graph 0.1, graph 0.1, graph 0.1, graph 0.1
plot "temp.data" using 2:1 with lines

size.sh

#!/bin/bash

COUNTER=1
revisions_back=$1
file_wildcard=$2

while [ $COUNTER -lt $revisions_back ]; do
  git checkout -b temp_br HEAD~$COUNTER
  # du won't give file size in bytes in OSX...
  size=`ls -al public/ | grep $file_wildcard | tr -s ' ' | tr '\t' ' ' | cut -d ' ' -f 5`
  sizes[ $COUNTER ]=$size
  # get date in YYYYMMDD format
  dates[ $COUNTER ]=`git show --format="%ci" HEAD | head -n 1 | cut -c 1-10 | sed 's/-//g'`
  commits[ $COUNTER]=`git rev-parse HEAD`
  git checkout dev
  git branch -D temp_br
  let COUNTER=COUNTER+1
done

let COUNTER=1
for i in "${sizes[@]}"; do
  # we want to ignore duplicate dates with uniq, so make that the last field
  echo "$i ${commits[ $COUNTER ]} ${dates[ $COUNTER ]}" >> temp.temp
  let COUNTER=COUNTER+1
done
 
cat temp.temp | uniq -f 2 > temp.data
rm -f temp.temp