gem pre-compile script

gem-native-compile.sh

#!/bin/bash

# commands
GEM=/usr/bin/gem
RAKE=/usr/bin/rake

# const params
TMP_DIR=/tmp/gem-native

usage()
{
    echo "$0 <bundle_package_dir>"
    exit 0
}

tmpdir()
{
    if [ -d "$TMP_DIR" ]; then
        rm -rf $TMP_DIR
    fi
    mkdir $TMP_DIR
}

# initialize
if [ -z "$1" ] || [ ! -d "$1" ]; then
    usage
fi
tmpdir
pkg_dir=`readlink -f $1`
gems=`find $pkg_dir -type f -name "*.gem"`
cd $TMP_DIR

# make native gem
for gem in $gems
do
    bname=`basename $gem .gem`
    echo "checking for $bname"

    # unpackaging gem
    $GEM unpack $gem
    pushd $bname

    # native compile
    $RAKE native gem || true
    native_gem=`test -d "./pkg" && find ./pkg -name "${bname}-*.gem"`

    # replace gem with native gem if native compiled
    if [ -n "$native_gem" ] && [ -f "$native_gem" ]; then
        rm -f $gem
        cp $native_gem ${gem%/*}
    fi
    popd
done