export.sh

#!/bin/bash

export_diff() {
    declare project=$1 period=$2 hash=$3

    local person="$(git -C "$project" show --format="%an" -s "$hash")"
    local target="output/$period/$person/${project#projects/}/$hash.html"

    mkdir -p "$(dirname "$target")"

    git -C "$project" show "$hash" | ./node_modules/.bin/diff2html --input stdin --file "$target"
}

export_project_for_period() {
    declare project=$1 sice=$2 until=$3

    echo " -> period $since -- $until"

    git -C "$project" log --format='%H' --since "$since" --until "$until" | while read hash ; do
        export_diff "$project" "$since" "$hash"
    done

}

export_project() {
    declare project=$1
    echo "Exporting $project"

    while read since until; do
        export_project_for_period "$project" "$since" "$until"
    done <<-EOF
		2015-09-01 2015-09-30
		2016-09-01 2016-09-30
		2017-09-01 2017-09-30
	EOF


}

main() {
    for name in projects/*; do
        export_project "$name"
    done
}

main "$@"