Bash script to generate churn counts in git repo

churn script

churn number and file name
git log --all -M -C --name-only | grep -E '^(app|lib)/' | sort | uniq -c | sort | awk 'BEGIN {print "count,file"} {print $1 "," $2}'

churn number and file name w/ limiting to last n commits
git log --all -n 5000 -M -C --name-only | grep -E '^spec/models' | sort | uniq -c | sort | awk 'BEGIN {print "count,file"} {print $1 "," $2}'

graph of churn number and frequency
git log --all -M -C --name-only | grep -E '^(app|lib)/' | sort | uniq -c | sort | awk '{print $1}' | uniq -c | sort | awk 'BEGIN { print "frequency,churn_count"} { print $1,$2}'

If you add -n to the final sort it will sort numerically instead of alphabetically

If you remove -all it allows specifying an SHA1 in the log as churn up to that SHA1.

I just found https://github.com/AnAppAMonth/git-churn, which is a python solution giving a more detailed interpretation of churn (additions, subtractions).

Solutions that I've found online looked at changes to files irrespective whether these are new changes or edits to existing lines of code. Hence I made this solution: https://github.com/flacle/truegitcodechurn/