find_merged_branches.sh

#!/bin/bash

# Usage:
# ./find_merged_branches.sh 2>/dev/null | tee output.txt

TMPDIR="$PWD/tmp"
while read repo; do
    rm -rf $TMPDIR
    url="git@github.com:$repo.git"
    git clone $url $TMPDIR 1>&2
    pushd $TMPDIR 1>&2
    branches=$(git br -a --merged | grep -Pv "develop|master|prototype" | xargs -0)
    while read branch; do
        if [ ! -z "$branch" ]; then
            echo "$repo $branch"
        fi
    done <<< "$branches"
    popd 1>&2
done < repos.txt