Copy Android locally built libraries from a library source path into the /libs/ directory of a specific module

collectlibs.sh

#! /usr/bin/env bash

# if there are no arguments, or if the first argument is -h or --help
if test ${1:--h} = -h -o ${1:--h} = --help; then
    echo "Usage: ${0} <buildtype> <src lib root> <destination lib dir> [<libnames>...]"
    echo "<buildtype> is eg debug or release"
    echo "<src lib root> is the directory containing the repos where libraries are to be found"
    echo "<destination lib dir> is the directory within the repo to which files should be copied"
    echo "<libnames> are the names of all libraries that should be copied (eg 'libcore')"
    echo "if no libraries are specified, the libraries already found in the destination will be copied again."
    exit
fi

AARPATH="build/outputs/aar"

buildtype=$1 # eg debug or release
libroot=$2 # The path to the directory containing the library repos
aardir=$3 # The path to the library directory within the repo to be updated
if test $# -gt 3; then
    libset=${@:4} # All remaining arguments are library names
else # get library names from destination directory
    libset="$(find ${aardir} -name *.aar -exec basename {} .aar \; | tr "\n" " ")"
fi
suffix="${buildtype}.aar"

# iterate over all build directories for all modules in all libraries
for dir in $(ls -d ${libroot}/*/*/${AARPATH}); do
    aar=$(ls "${dir}"/*-${suffix}) # find the relevant compiled library file
    libname=$(basename "${aar%%-${suffix}}") # get the resulting library name 
    if [[ " ${libset} " == *" ${libname} "* ]]; then
        # if the library is in the set of libraries to copy,
        # copy it to the repo where it's needed (without the suffix)
        cp "${aar}" "${aardir}/${libname}.aar"
        echo "copied ${libname}.aar to ${aardir}" # and give feedback
    fi
done