Sync libs for running docker simulator tests for Kaleidoscope

sync-ks-libs.sh

#!/bin/bash

# Synchronize the copy of a library used for building Kaleidoscope
# (i.e. KeyboardioHID) that will be used inside the Docker container with the
# one that is being used for normal builds.  We do this by getting the git
# revision of the repo on the host, adding that repo as a remote for the docker
# version, and checking out the same revision there.
sync_docker_lib () {
    LIB="$1"

    if [[ -z ${LIB} ]]; then
        echo "No lib specified to sync!" 1>&2
        return 1
    fi

    if [[ -z ${KALEIDOSCOPE_LOCAL_LIB_DIR} ]]; then
        echo "KALEIDOSCOPE_LOCAL_LIB_DIR was not defined." 1>&2
        return 1
    fi

    if [[ ! -d ${KALEIDOSCOPE_LOCAL_LIB_DIR} ]]; then
        echo "KALEIDOSCOPE_LOCAL_LIB_DIR ${KALEIDOSCOPE_LOCAL_LIB_DIR} not found." 1>&2
        return 1
    fi

    SOURCE_REPO="${KALEIDOSCOPE_LOCAL_LIB_DIR}/${LIB}"

    if [[ ! -d ${SOURCE_REPO} ]]; then
        echo "Couldn't find lib dir: ${SOURCE_REPO}." 1>&2
        return 1
    fi

    # Get hash of revision checked out in host repo.
    REV=$(cd "${SOURCE_REPO}" && git rev-parse HEAD)

    # Change dir to the repo used in Docker builds.
    DEST_REPO="${KALEIDOSCOPE_DIR}/.arduino/user/hardware/keyboardio/virtual/libraries/${LIB}"

    if [[ ! -d ${DEST_REPO} ]]; then
        echo "Couldn't find dest lib dir: ${DEST_REPO}"
        return 1
    fi
    
    cd "${DEST_REPO}"

    # If the remote already exists, remove it.  This seems to prevent some
    # errors, but ought to be unnecessary.
    (git remote | grep -q '^host_sync$') && \
        git remote remove "host_sync"

    # Add the host repo as a remote so we can sync to it.
    git remote add "host_sync" "${SOURCE_REPO}"
    git fetch "host_sync"

    # Check out the current revision from the host repo.
    git checkout ${REV}
}

for LIB in $(find "${KALEIDOSCOPE_LOCAL_LIB_DIR}" -type d -depth 1 -exec basename '{}' ';'); do
    sync_docker_lib "${LIB}"
done