#!/bin/sh

git log --since="3 years ago" \
        --numstat \
        --pretty=format:"COMMIT %H" |
awk '
/^COMMIT/ { next }

/^[0-9]/ {
    file = $3

    # Exclude generated / mechanical files
    if (file ~ /^include\/com\/sun\/star\//) next
    if (file ~ /^offapi\//) next
    if (file ~ /^udkapi\//) next
    if (file ~ /^workdir\//) next
    if (file ~ /^translations\//) next
    if (file ~ /^helpcontent2/) next

    # Exclude build / tooling noise
    if (file ~ /\.mk$/) next
    if (file ~ /^configure(\.ac|\.in)?$/) next
    if (file ~ /^download\.lst$/) next
    if (file ~ /^solenv\//) next

    files[file]++
    churn[file] += $1 + $2
}
END {
    for (f in files) {
        printf "%6d commits | %8d LOC churn | %s\n",
               files[f], churn[f], f
    }
}' |
sort -nr