combine-extra-source

#!/bin/bash

set -e
set -x

base="${1?Usage: $0 base-name}"

es="${base}-extra-source"
rm -rf  "$es"
mkdir -p "$es/archives"

for ar in label=*/*.tar; do
    (cd "$es/archives" && tar xf ../../"$ar" --strip-components 1)
    for f in $(tar tf "$ar" "*.tar.*"); do
        echo "$f"
        n=$(basename "$f")
        d=$(dirname "$f")
        d=${d#$base-}
        d=${d%-extra-source}
        mkdir -p "$es/$d"
        ln -sf "../archives/$n" "$es/$d/"
    done
done

tar cf "$es.tar" "$es"
rm -rf "$es"