Get commits by month for a given time range and output to tab-delimited text.

gitstats.sh

#!/bin/bash

stats_file="${HOME}/Dropbox/projects/loc/stats.txt"
start_date='2011-04-01'
end_date='2012-04-01'
sep='\t'

echo -en ${sep} > "${stats_file}"

months=(Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar)

for (( i=0; i<${#months[@]}-1; i++ )) ; do
    echo -en "${months[$i]}${sep}" >> "${stats_file}"
done

echo "${months[${#months[@]}-1]}" >> "${stats_file}"

for repo in $(ls -d */) ; do
    cd "${repo}"

    echo -n $(echo "${repo}" | sed 's/\/*$//') >> "${stats_file}"
    echo -en "${sep}" >> "${stats_file}"

    for (( i=0; i<${#months[@]}-1; i++ )) ; do
        echo -n $(git shortlog -n --format='%ad %s' \
            --since=${start_date} --until=${end_date} | \
            grep "${months[$i]}" | wc -l) >> "${stats_file}"
        echo -en "${sep}" >> "${stats_file}"
    done

    echo $(git shortlog -n --format='%ad %s' \
        --since=${start_date} --until=${end_date} | \
        grep "${months[${#months[@]}-1]}" | wc -l) >> "${stats_file}"

    cd ..
done