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#!/bin/bash
#
# createpkg: package builder using http://slack.sarava.org/slackbuilds scripts
# feedback: rhatto at riseup.net | gpl
#
#  createpkg is free software; you can redistribute it and/or modify it under the
#  terms of the GNU General Public License as published by the Free Software
#  Foundation; either version 2 of the License, or any later version.
#
#  createpkg is distributed in the hope that it will be useful, but WITHOUT ANY
#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
#  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License along with
#  this program; if not, write to the Free Software Foundation, Inc., 59 Temple
#  Place - Suite 330, Boston, MA 02111-1307, USA
#
# /etc/simplepkg/slackbuildrc parameters:
#
# SLACKBUILDS="/folder/to/place/slackbuilds", defaults to /var/slackbuilds
# SVN="svn://repository", defaults do svn://slack.sarava.org/slackbuilds
# SYNC="yes|no", whether to always update the repository
#
# TODO
#
# - optionally show a dependency tree before create the package
# - ok - ??? think if its better to change function check_config to directly source
#   both /root/.slackbuildrc and /etc/slackbuildrc
# - ok - option --list to list all available slackbuilds
# - ok - option --search allowing use of wildcards or just part of the package name
# - in function solve_dep: resolve program versions
#

#---------------------------------------------------
#               Createpkg functions
#---------------------------------------------------
function handle_error {

    # this function deals with internal createpkg errors
    # and also with non-zero exit codes from slackbuilds
    # Input:    $1 - error code
    # Output:   Error mensage
    #
    # check slackbuild exit status are:
    #
    # ERROR_WGET=31;      ERROR_MAKE=32;      ERROR_INSTALL=33
    # ERROR_MD5=34;       ERROR_CONF=35;      ERROR_HELP=36
    # ERROR_TAR=37;       ERROR_MKPKG=38      ERROR_GPG=39
    # ERROR_PATCH=40;     ERROR_VCS=41
    #
    # thanks to rudsonalves at yahoo.com.br for this spec.

    # we don't want to process when exit status = 0
    if [ "$1" == "0" ]; then
        return
    fi

    # exit codes
    case $1 in
        2)  usage ;;
        3)  echo -e "$CL_ALERT $BASENAME: could not update the repository $2 $CL_OFF" ;;
        4)  echo -e "$CL_ALERT $BASENAME: could not create folder $2 $CL_OFF" ;;
        5)  echo -e "$CL_ALERT $BASENAME: script not found for $2 $CL_OFF" ;;
        31) echo -e "$CL_ERROR $BASENAME: error downloading source for $2 $CL_OFF" ;;
        32) echo -e "$CL_ERROR $BASENAME: error compiling $2 source code $CL_OFF" ;;
        33) echo -e "$CL_ERROR $BASENAME: error installing $2 $CL_OFF" ;;
        34) echo -e "$CL_ERROR $BASENAME: error on source code integrity check for $2 $CL_OFF" ;;
        35) echo -e "$CL_ERROR $BASENAME: error configuring the source code for $2 $CL_OFF" ;;
        36) exit 0 ;; # its supposed to never happen here :P
        37) echo -e "$CL_ERROR $BASENAME: error decompressing source code for $2 $CL_OFF" ;;
        38) echo -e "$CL_ERROR $BASENAME: error creating package $2 $CL_OFF" ;;
        39) echo -e "$CL_ERROR $BASENAME: error verifying GPG signature the source code for $2 $CL_OFF" ;;
        40) echo -e "$CL_ERROR $BASENAME: error patching the source code for $2 $CL_OFF" ;;
        41) echo -e "$CL_ERROR $BASENAME: error downloading $2 source from version control system $CL_OFF" ;;
        *)  echo -e "$CL_ERROR $BASENAME: unknown error or user interrupt $CL_OFF" ;;
    esac

    exit $1

}

function build_repo {

    # checkout a new slackbuild working copy

    BASEDIR="`dirname $SLACKBUILDS`"
    mkdir -p $BASEDIR || handle_error 4 $BASEDIR
    cd $BASEDIR
    svn checkout $SVN
    cd $SLACKBUILDS

}

function usage {

    echo -e "$CL_COMMU Usage: createpkg [--install] package-name $CL_OFF"
    echo -e "$CL_COMMU        createpkg --no-deps package-name $CL_OFF"
    echo -e "$CL_COMMU        createpkg --search package-name $CL_OFF"
    echo -e "$CL_COMMU        createpkg --info package-name $CL_OFF"
    echo -e "$CL_COMMU        createpkg --list $CL_OFF"
    echo -e "$CL_COMMU        createpkg --sync $CL_OFF"
    echo -e "$CL_COMMU        createpkg --help $CL_OFF"

}

function check_config {

    # check the configuration

    # TODO: eval also ~/.slackbuildrc
    #if [ -f "$SLACKBUILDRC" ]; then
    #  source $SLACKBUILDRC
    #fi

    TMP=${TMP:=/tmp}
    REPOS=${REPOS:=$TMP}
    SLACKBUILDS=${SLACKBUILDS:=/var/slackbuilds}
    SVN=${SVN:=svn://slack.sarava.org/slackbuilds}
    SYNC=${SYNC:=no}
    BASEDIR="`dirname $SLACKBUILDS`"

}

function solve_dep {

    pack="$1"
    cond="$2"
    ver="$3"

    #if [ "$cond" != "e" ] && [ "$cond" != "l" ] && [ "$cond" != "ge" ] && [ "$cond" != "le" ] && [ ! -z "$cond" ]; then
    if [ ! -z "$cond" ]; then
        # slack-required has a wrong logical sentence, so we ignore it
        check_version="no"
    fi

    for candidate in `ls /var/log/packages/$pack* 2> /dev/null`; do
        candidate="`package_name $candidate`"
        if [ "$pack" == "$candidate" ]; then
            if [ "$check_version" != "no" ]; then
                # TODO: check if the pack has the correct version
                true
            fi
            found="1"
            break
        fi
    done

    if [ "$found" != "1" ]; then
        echo -e "$CL_MENSG $BASENAME: processing $PACKAGE dependency $pack $CL_OFF"
        SYNC=no CREATEPKG_CHILD=$CREATEPKG_CHILD createpkg --install $pack
        # check if the package was built and installed
        exit_code="$?"
        if [ "$exit_code" != "0" ]; then
            echo -e "$CL_ALERT $BASENAME: received an error when processing $pack, aborting $CL_OFF"
            exit $exit_code
        fi
    else
        found="0"
    fi

}

function check_repo {

    if [ ! -d "$SLACKBUILDS" ]; then
        build_repo
    fi

}

function sync_repo {

    cd $SLACKBUILDS
    svn update || build_repo

}

function find_script {

    #find $SLACKBUILDS | grep -v .svn | grep -e "/$1.SlackBuild$"
    find $SLACKBUILDS -name $1.SlackBuild

}

function info_builds {

    # Show packages info
    if [ "$PKG_PATH" != "" ]; then
        for i in $PKG_PATH; do
            PACKAGE=`basename $i .SlackBuild`
            NAME_UP=`echo $PACKAGE | tr [a-z] [A-Z]`
            echo -e "$CL_COMMU $NAME_UP: $CL_OFF"
            eval "cat $i | grep '^$PACKAGE:' | cut -f2- -d:"
            echo -e "$CL_OFF"
        done
    fi

}

function list_builds {

    # List all available SlackBuilds
    # find $SLACKBUILDS -name *.SlackBuild | sed -r 's,.*/(.*)\.SlackBuild$,\1,' | sort
    cd $SLACKBUILDS
    echo "Sarava SlackBuilds list"
    # level 1
    for i in *; do
        if [ -d $i ]; then
            echo -e "  $i: "
            (
            cd $i
            # level 2
            for j in *; do
                if [ -d $j ]; then
                    echo -e "$CL_COMMU    $j $CL_OFF"
                    (
                    cd $j
                    BUILD="`ls *.SlackBuild 2>/dev/null`"
                    if [ "$BUILD" != "" ]; then
                        # level 3
                        for k in $BUILD; do
                            echo -e "$CL_MENSG      $k $CL_OFF"
                        done
                    else
                        BUILD=""
                    fi
                    for k in *; do
                        if [ -d $k ]; then
                            echo -e "$CL_MENSG      $k.SlackBuild $CL_OFF"
                        fi
                    done
                    )
                fi
            done
            )
        fi
    done
}

#---------------------------------------------------
#                 Starting createpkg
#---------------------------------------------------
# Common functions
COMMON="/usr/libexec/simplepkg/common.sh"

# TODO: SLACKBUILDRC is need?
if [ -f ~/.slackbuildrc ]; then
    SLACKBUILDRC=~/.slackbuildrc
else
    SLACKBUILDRC=/etc/slackbuildrc
fi

source $SLACKBUILDRC 2>/dev/null

# Select color mode: gray, color or none (*)
# CL_COMMU - Communication
# CL_MENSG - Commum messages
# CL_ERROR - Error messages
# CL_OFF   - turn off color
case "$COLOR" in
    'gray')
        CL_COMMU="\033[37;1m"
        CL_MENSG="\033[37;1m"
        CL_ERROR="\033[30;1m"
        CL_ALERT="\033[37m"
        CL_OFF="\033[m"
    ;;
    'color')
        CL_COMMU="\033[34;1m" # green
        CL_MENSG="\033[32;1m" # blue
        CL_ERROR="\033[31;1m" # red
        CL_ALERT="\033[33;1m" # yellow
        CL_OFF="\033[m"       # normal
    ;;
    *)
        CL_COMMU=""
        CL_MENSG=""
        CL_ERROR=""
        CL_ALERT=""
        CL_OFF=""
    ;;
esac

# First load simplepkg helper functions
if [ -f "$COMMON" ]; then
    source $COMMON
else
    echo -e "$CL_ERROR error: file $COMMON found, check your $BASENAME installation $CL_OFF"
    exit 1
fi

# This is used to show how many children process we have
if [ -z "$CREATEPKG_CHILD" ]; then
    CREATEPKG_CHILD="1"
else
    #CREATEPKG_CHILD="`echo $CREATEPKG_CHILD + 1 | bc -l`"
    let CREATEPKG_CHILD++
fi

BASENAME="`basename $0`[$CREATEPKG_CHILD]"

check_config
check_repo

case $1 in
    '--search')
        [ $# -ne 2 ] && handle_error 2   # two parameters is required
        find_script $2
        exit
    ;;
    '--info')
        [ $# -ne 2 ] && handle_error 2   # two parameters is required
        PKG_PATH=`find_script $2`
        info_builds
        exit
    ;;
    '--install')
        [ $# -ne 2 ] && handle_error 2   # two parameters is required
        PACKAGE="$2"
        INSTALL="1"
    ;;
    '--no-deps')
        [ $# -ne 2 ] && handle_error 2   # two parameters is required
        NO_DEPS="1"
        PACKAGE="$2"
    ;;
    '--sync')
        sync_repo
        exit
    ;;
    '--help'|'')
        usage
        exit
    ;;
    '--list')
        list_builds
        exit
    ;;
    *)
        if [ "${1:0:1}" != "-" ]; then
            PACKAGE="$1"
        else
            handle_error 2
        fi
    ;;
esac

# Synchronize repository
if [ "$SYNC" == "yes" ]; then
    sync_repo
fi

# Get SlackBuild script
BUILD_SCRIPT="`find_script $PACKAGE`"

# Select one SlackBuild
if [ "`echo $BUILD_SCRIPT | wc -w`" -gt 1 ]; then
    AUX="$PS3"
    PS3="Choice: "
    LIST=`echo $BUILD_SCRIPT | sed 's/ /\n/g' | sed -r 's/.*\/(.*)\.SlackBuild$/\1/'`" EXIT"
    select PACKAGE in `echo $LIST`; do
        break
    done
    if [ "$PACKAGE" = "EXIT" ]; then
        echo -e "$CL_ERROR error: None package select $CL_OFF"
        exit 1
    fi
    # Select only one SlackBuild in BUILD_SCRIPT
    BUILD_SCRIPT=`echo $BUILD_SCRIPT | sed 's/ /\n/g' | grep "/$PACKAGE.SlackBuild"`
    PS3="$AUX"
else
    PACKAGE=`echo $BUILD_SCRIPT | sed -r 's/.*\/(.*)\.SlackBuild$/\1/'`
fi

# Check SlackBuild script found
if [ -z "$BUILD_SCRIPT" ]; then
    handle_error 5 $PACKAGE
fi

# Get dirname and script name from slackbuild
SCRIPT_BASE="`dirname $BUILD_SCRIPT`"
SCRIPT_NAME="`basename $BUILD_SCRIPT`"
echo -e "$CL_MENSG $BASENAME: found script $PACKAGE.SlackBuild, now checking for dependencies $CL_OFF"

# Sets the package's slack-required
if [ -f "$SCRIPT_BASE/$PACKAGE.slack-required" ]; then
    SLACK_REQ="$SCRIPT_BASE/$PACKAGE.slack-required"
elif [ -f "$SCRIPT_BASE/slack-required" ]; then
    SLACK_REQ="$SCRIPT_BASE/slack-required"
fi

if [ ! -z "$SLACK_REQ" -a "$NO_DEPS" != "1" ]; then
    # this routine checks for dependencies in package's slack-required
    while read dep; do
        if [ ! -z "$dep" ]; then
            program="`echo $dep | awk '{ print $1 }'`"
            condition="`echo $dep | awk '{ print $2 }' | tr [=\>\<] [egl]`"
            version="`echo $dep | awk '{ print $3 }' | tr -dc '[:digit:]'`"
            solve_dep $program $condition $version
        fi
    done < <( cat $SLACK_REQ )
    echo -e "$CL_MENSG $BASNEMAE: done checking for $PACKAGE dependencies $CL_OFF"
else
    echo -e "$CL_MENSG $BASENAME: no unmet dependencies for $PACKAGE $CL_OFF"
fi

echo -e "$CL_MENSG $BASENAME: processing $SCRIPT_NAME $CL_OFF"

# Built package
cd $SCRIPT_BASE
# Execute SlackBuild script with variables protection
( INTERACT=no ./$SCRIPT_NAME )

# Check if package was built
handle_error $? $PACKAGE

PKG_TGZ="`ls -1 -c $REPOS/$PACKAGE-*-*-*tgz | head -n 1`"
mkdir -p $PKG_TGZ $REPOS/${SCRIPT_BASE/$BUILD_SCRIPT}

if [ "$INSTALL" == "1" ]; then
    # as we dont have the full package file name, we'll
    # use the newer file name that matches our wildcard:

    upgradepkg --install-new $PKG_TGZ
fi