number of pull requests per major release

pull_request_stats.sh

#!/bin/bash

set -ueo pipefail

majors=$(seq 66 72)
projects="dmd druntime phobos dlang.org tools installer"

printf ' %9s  ' ''
for maj in $majors; do
    echo -n "..v2.0$maj.0 "
done
echo
printf ' %9s  ' ''
for maj in $majors; do
    date=$(git -C dmd show v2.0$maj.0 --no-patch --date=short --format=%cd | tail -n 1)
    echo -n "$date "
done
echo

for proj in $projects; do
    printf ' %9s   ' $proj

    for maj in $majors; do
        num_mrs=$(git -C $proj log --merges --oneline v2.0$((maj - 1)).0..v2.0$maj.0 | wc -l)
        printf ' %8s  ' $num_mrs
    done
    echo
done

printf ' %9s   ' sum
for maj in $majors; do
    sum_mrs=0
    for proj in $projects; do
        num_mrs=$(git -C $proj log --merges --oneline v2.0$((maj - 1)).0..v2.0$maj.0 | wc -l)
        sum_mrs=$(($sum_mrs + $num_mrs))
    done
    printf ' %8s  ' $sum_mrs
done
echo