开源代码 shell case 用法

#!/bin/sh -e

usage="
Usage: $0 [OPTIONS]
Installs OpenNI to current machine.

-i,--install
    Installs OpenNI (default mode)
-u,--uninstall
    Uninstalls OpenNI.
-c,--cross-compile-rootfs <path>
    Used for cross-compiling. Installs OpenNI to <path> instead of '/'.
-h,--help
    Shows this help screen.
"

OS_NAME=`uname -s`

case $OS_NAME in
Darwin)
    MODULES="libnimMockNodes.dylib libnimCodecs.dylib libnimRecorder.dylib"
    GACDIR=""
    ;;
*)
    MODULES="libnimMockNodes.so libnimCodecs.so libnimRecorder.so"
    GACDIR="-gacdir $rootfs/usr"    
    ;;
esac

SCRIPT_DIR=`pwd`/`dirname $0`

# create file list
LIB_FILES=`ls $SCRIPT_DIR/Lib/*`
BIN_FILES=`ls $SCRIPT_DIR/Bin/ni*`
JAR_FILES=`ls $SCRIPT_DIR/Jar/*.jar`

rootfs=

# parse command line
while [ "$1" ]; do
    case $1 in
    -i|--install)
        install=yes
        ;;
    -u|--uninstall)
        uninstall=yes
        ;;
    -c|--cross-staging-dir)
        shift
        rootfs=$1
        ;;
    -h|--help) 
        echo "$usage"
        exit 0
        ;;
    *)
        echo "Unrecognized option $1"
        exit 1
    esac
    shift
done

# default mode is install
if [ ! "$install" = yes ] && [ ! "$uninstall" = yes ]; then
    install=yes
fi

# validity check
if [ "$install" = yes ] && [ "$uninstall" = yes ]; then
    echo "-i and -u flags cannot be used together!"
    exit 1
fi

INSTALL_LIB=$rootfs/usr/lib
INSTALL_BIN=$rootfs/usr/bin
INSTALL_INC=$rootfs/usr/include/ni
INSTALL_VAR=$rootfs/var/lib/ni
INSTALL_JAR=$rootfs/usr/share/java

# make all calls into OpenNI run in this filesystem
export OPEN_NI_INSTALL_PATH=$rootfs
# make sure the staging dir OpenNI is the one being run
export LD_LIBRARY_PATH=$INSTALL_LIB

if [ "$install" = yes ]; then
    printf "Installing OpenNI\n"
    printf "****************************\n\n"
    
    # copy libraries
    printf "copying shared libraries..."
    cp $LIB_FILES $INSTALL_LIB
    printf "OK\n"

    # utilities
    printf "copying executables..."
    cp $BIN_FILES $INSTALL_BIN
    printf "OK\n"

    # include files
    printf "copying include files..."
    mkdir -p $INSTALL_INC
    cp -r Include/* $INSTALL_INC
    printf "OK\n"

    # create database dir
    printf "creating database directory..."
    mkdir -p $INSTALL_VAR
    printf "OK\n"

    # register modules
    for module in $MODULES; do
        printf "registering module '$module'..."
        $INSTALL_BIN/niReg -r $INSTALL_LIB/$module
        printf "OK\n"
    done

    # mono
    if [ -f $rootfs/usr/bin/gmcs -a -f Bin/OpenNI.net.dll ]; then
        printf "Installing .Net wrappers...\n"
        gacutil -i Bin/OpenNI.net.dll -package 2.0 $GACDIR
    fi

    # java wrappers
    printf "creating java bindings directory..."
    mkdir -p $INSTALL_JAR
    printf "OK\n"

    printf "Installing java bindings..."
    cp $JAR_FILES $INSTALL_JAR
    printf "OK\n"

    printf "\n*** DONE ***\n\n"

elif [ "$uninstall" = yes ]; then
    printf "Uninstalling OpenNI\n"
    printf "****************************\n\n"

    # unregister modules
    for module in $MODULES; do
        printf "unregistering module '$module'..."
        if $INSTALL_BIN/niReg -u $INSTALL_LIB/$module; then
            printf "OK\n"
        fi
    done

    # include files
    printf "removing include files..."
    rm -rf $INSTALL_INC
    printf "OK\n"

    # binaries
    printf "removing executables..."
    for filename in $BIN_FILES; do
        rm -f $INSTALL_BIN/`basename $filename`
    done
    printf "OK\n"

    # libraries
    printf "removing shared libraries..."
    for filename in $LIB_FILES; do
        rm -f $INSTALL_LIB/`basename $filename`
    done
    printf "OK\n"

    # mono
    if [ -f $rootfs/usr/bin/gmcs -a -f Bin/OpenNI.net.dll ]; then
        printf "Removing .Net wrappers...\n"
        gacutil -u OpenNI.net $GACDIR
    fi

    # java
    printf "removing java bindings..."
    for filename in $JAR_FILES; do
        rm -f $INSTALL_JAR/`basename $filename`
    done
    printf "OK\n"
    
    printf "\n*** DONE ***\n\n"

fi