#!/usr/bin/env bash

#

# Prints the number of lines per author.

#

# <author_first_name> <author_last_name> <number_of_lines>

#

# Notes:

#

# * Beware that this script can take awhile to run.

# * `git ls-files`

# - List indexed files.

# * `xargs -n1 git blame`

# - For each file, determine who last modified each line of the file.

# * `grep`

# - Extract the line containing the author name.

# * `sed`

# - Remove the 'author ' prefix.

# * `sort`

# - Sort the author names in lexicographic order.

# * `uniq -c`

# - Count the number of repeats and remove repeated names.

# * `sort -nr`

# - Sort the counts in reverse numerical order.

# * `awk '{}'`

# - Format the output.

git ls-files | xargs -n1 git blame --line-porcelain | grep 'author ' | sed -n 's/^author //p' | sort | uniq -c | sort -nr | awk '{print $2 OFS $3 OFS $1'