Creates a histogram CSV file of the age of every line of code in a directory

getAgeOfCodebase.sh

#!/bin/bash

set -e

APP_DIR="$1"

TEMP_FILE="codebase-age-histogram.txt"
OUTPUT_FILE="codebase-age-histogram.csv"

pushd $APP_DIR

APP_FILES=`find . -type f -follow -print`

rm -f $TEMP_FILE
touch $TEMP_FILE

for APP_FILE in $APP_FILES; do
  echo "Annotating $APP_FILE..."
  git annotate $APP_FILE | awk '{ print $4 }' >> $TEMP_FILE
done

sort -n $TEMP_FILE | uniq -c | sed -e 's/^ *//;s/ /,/' > $OUTPUT_FILE
rm -f $TEMP_FILE

echo ""
echo "Done! Histogram CSV saved to $OUTPUT_FILE"

popd