qt-switcher

#!/bin/bash
# Using this script you can easily switch between your installed Qt versions
# This script is intended to be used on ArchLinux with the compiled Qt versions of the following qt pkgbuilds: http://github.com/friesoft/archlinux-friesoft-pkgbuilds/tree/master
# Copyleft Bernhard Friedreich (friesoft), 2009
# Usage: source ./qt-switcher

checkQtInstallations()
{
    echo -e "\r\nSearching for installed Qt versions via pacman"
    qtversioncount="1"

    ######################## DEFAULT INSTALL PATH ########################
    # search for a qt-stable package which is installed in your default path --> no parallel package
    default_path=`pacman -Qq | grep -E "^qt-stable*" | grep -v parallel`
    if [ -n "$default_path" ]; then
        # No stable package in /usr found - search for unstable

        # search for a qt-unstable package which is installed in your default path --> no parallel package
        default_path=`pacman -Qq | grep -E "^qt-unstable*" | grep -v parallel`
        if [ -n "$default_path" ]; then
            # No unstable package in /usr found - search for experimental

            # search for a qt-experimental package which is installed in your default path --> no parallel package
            default_path=`pacman -Qq | grep -E "^qt-experimental*" | grep -v parallel`
            if [ -n "$default_path" ]; then
                echo "No Qt installation by friesoft has been found in /usr - I strongly advice you to use my stuff :P"
            else
                echo "Found Qt experimental installed in /usr default installation path"
            fi
        else
            echo "Found Qt unstable installed in /usr default installation path"
        fi
    else
        echo "Found Qt stable installed in /usr default installation path"
    fi
    ######################## DEFAULT INSTALL PATH ########################

    parallel_experimental=`pacman -Qq | grep -E "^qt-experimental*" | grep parallel`
    echo -e "\r\nFound the following experimental Qt versions installed in parallel:"
    echo $parallel_experimental

    parallel_unstable=`pacman -Qq | grep -E "^qt-unstable*" | grep parallel`
    echo -e "\r\nFound the following unstable Qt versions installed in parallel:"
    echo $parallel_unstable

    parallel_stable=`pacman -Qq | grep -E "^qt-stable*" | grep parallel`
    echo -e "\r\nFound the following stable Qt versions installed in parallel:"
    echo $parallel_stable

    # TODO: show a list with numbers about the installed versions and share it with the "askForUserInput" function
    # TODO: save the list of installed packages
    # TODO: offer option to install new (not yet installed) qt version
    # TODO: show userfriendly strings (e.g. instead of "qt-unstable-git-parallel" show "Qt Unstable installed in /opt/qt-unstable")

    #if "qt-experimental-kinetic-declarative-git"
    #    printInstalledQtVersion $qtversioncount "Default path (/usr) - Qt Experimental kinetic declarative"
    #fi
    #echo -n "    (1) Default path (/usr)"
    #echo -n "    (2) Qt Stable 4.5"
    #echo -n "    (3) Qt Stable 4.6"
    #echo -n "    (4) Qt Unstable (master)"
    #echo -n "    (5) Qt Experimental - kinetic clone (head - animations)"
    #echo -n "    (6) Qt Experimental - kinetic clone (declarativeui)"
}

printInstalledQtVersion()
{
    echo -n "    $1 $2"
}

askForUserInput()
{
    echo -n "Switch to Qt version: "
    read -n 1 key

    switchQtVersion $key
    returnvalue=$?

    while [ "$returnvalue" -ne "0" ]
    do
        askForUserInput
    done
}

switchQtVersion()
{
    # TODO: clear PATH and LD_LIBRARY_PATH before setting again - otherwise those paths will fill up if using qt-switcher more than once
    qttargetversion=""
    case "$1" in
        "1")
            qttargetversion="Default path (/usr)"
            export PATHSAVE="$PATH"
            export LDSAVE="$LD_LIBRARY_PATH"
            export QTDIR="/usr"
            export PATH="$QTDIR/bin:$PATHSAVE"
            export LD_LIBRARY_PATH="$QTDIR/lib:$LDSAVE"
            ;;
        "2")
            qttargetversion="Qt Stable 4.5"
            export PATHSAVE="$PATH"
            export LDSAVE="$LD_LIBRARY_PATH"
            export QTDIR="/opt/qt-stable-4.5"
            export PATH="$QTDIR/bin:$PATHSAVE"
            export LD_LIBRARY_PATH="$QTDIR/lib:$LDSAVE"
            ;;
        "3")
            qttargetversion="Qt Stable 4.6"
            export PATHSAVE="$PATH"
            export LDSAVE="$LD_LIBRARY_PATH"
            export QTDIR="/opt/qt-stable-4.6"
            export PATH="$QTDIR/bin:$PATHSAVE"
            export LD_LIBRARY_PATH="$QTDIR/lib:$LDSAVE"
            ;;
        "4")
            qttargetversion="Qt Unstable"
            export PATHSAVE="$PATH"
            export LDSAVE="$LD_LIBRARY_PATH"
            export QTDIR="/opt/qt-unstable"
            export PATH="$QTDIR/bin:$PATHSAVE"
            export LD_LIBRARY_PATH="$QTDIR/lib:$LDSAVE"
            ;;
        "5")
            qttargetversion="Qt Experimental kinetic"
            export PATHSAVE="$PATH"
            export LDSAVE="$LD_LIBRARY_PATH"
            export QTDIR="/opt/qt-experimental/kinetic"
            export PATH="$QTDIR/bin:$PATHSAVE"
            export LD_LIBRARY_PATH="$QTDIR/lib:$LDSAVE"
            ;;
        "6")
            qttargetversion="Qt Experimental kinetic - declarativeui"
            export PATHSAVE="$PATH"
            export LDSAVE="$LD_LIBRARY_PATH"
            export QTDIR="/opt/qt-experimental/kinetic-declarative"
            export PATH="$QTDIR/bin:$PATHSAVE"
            export LD_LIBRARY_PATH="$QTDIR/lib:$LDSAVE"
            ;;
        *)
            echo -e "\r\n\r\nWrong input! Please try again\r\n\r\n"
            return 1
            ;;
    esac

    echo -e "\r\n\r\nSwitching Qt version to "$qttargetversion

    return
}

echo "Welcome to the Qt version switcher by friesoft - Have fun :-)"

checkQtInstallations
askForUserInput

echo "Finished setting up your dev environment! - Have fun hacking (with) Qt!"