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#! /bin/bash
#   pbuilder -- personal Debian package builder
#   Copyright (C) 2001,2002,2005-2007 Junichi Uekawa
#
#   This program 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
#   (at your option) any later version.
#
#   This program 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

# functions local to pbuilder-buildpackage

getdscfiles () {
    local DSCFILE="$1"
    local DSCFILES=()
    DSCFILES+=("$DSCFILE")
    DSCFILES+=("$(cat "$DSCFILE" |
        awk 'BEGIN{p=0}
             ! /^[ \t]/ {p=0}
             /^Files:/ {p=1}
             ! /^[ \t]*/ {p=0}
             /^ / {if (p){print "'$(dirname "$DSCFILE")'/" $3}}' |
        tr '\n' ' ' | sed -e 's/[[:space:]]*$//')")
    #  ↑↑↑ because we are really picky (and we have picky tests...)
    echo "${DSCFILES[@]}"
}

function copydsc () {
    local DSCFILE=$(getdscfiles "$1")
    local TARGET="$2"
    for FILE in ${DSCFILE[@]} ; do
    log.i "copying [$FILE]"
        cp -p "$FILE" "$TARGET" 
    done
}

function checkbuilddep () {
    # call satisfydepends
    local BUILDOPT="--binary-all"
    case "${BINARY_ARCH}" in
        yes) BUILDOPT="--binary-arch";;
        *) ;;
    esac
    if "$PBUILDERSATISFYDEPENDSCMD" --control "$1" --chroot "${BUILDPLACE}" --internal-chrootexec "${CHROOTEXEC}" "${BUILDOPT}" "${PBUILDERSATISFYDEPENDSOPT[@]}"; then
        :
    else
        # If asked to preserve the build place, and pbuilder-satisfydepends
        # didn't taint it, then don't clean it when exiting.
        if [ $? -eq 2 -a "${PRESERVE_BUILDPLACE}" = "yes" ]; then
            trap umountproc_trap exit sighup
        fi
        log.e "pbuilder-satisfydepends failed."
        exit 2
    fi
    # install extra packages to the chroot
    if [ -n "$EXTRAPACKAGES" ]; then 
        $CHROOTEXEC usr/bin/apt-get -q -y "${APTGETOPT[@]}" install ${EXTRAPACKAGES}
    fi
}

function showbuildbanner () {
    # show some banners for building
    log.i "pbuilder-buildpackage/"$(dpkg --print-architecture) 
    log.i "$1"
}

function cowprotect () {
    # a hack for cowdancer, used when a file is edited in-place;
    # Copy the file to create a new i-node so that hardlinked original is intact
    for A in "$@"; do
        if readlink -f "$A" > /dev/null; then
            A=$(readlink -f "$A")
            mv "$A" "$A"~
            cp -a "$A"~ "$A"
            rm -f "$A"~
        fi
    done
}

function createbuilduser () {
    # create the build user, if it is necessary and specified.
    if [ -n "$BUILDUSERNAME" -a -n "$BUILDUSERID" ]; then
        if [ -e $BUILDPLACE/etc/shadow ]; then p='x'; else p='*'; fi
        if [ -e $BUILDPLACE/etc/gshadow ]; then g='x'; else g='*'; fi
        if ! grep -q ^$BUILDUSERNAME: $BUILDPLACE/etc/passwd; then
            cowprotect $BUILDPLACE/etc/passwd
            echo "$BUILDUSERNAME:$p:$BUILDUSERID:$BUILDUSERID:,,,:$BUILD_HOME:/bin/sh" >> $BUILDPLACE/etc/passwd
        fi
        if ! grep -q ^$BUILDUSERNAME: $BUILDPLACE/etc/group; then
            cowprotect $BUILDPLACE/etc/group
            echo "$BUILDUSERNAME:$g:$BUILDUSERID:" >> $BUILDPLACE/etc/group
        fi
        if [ -e $BUILDPLACE/etc/shadow ] && ! grep -q ^$BUILDUSERNAME: $BUILDPLACE/etc/shadow; then
            cowprotect $BUILDPLACE/etc/shadow
            echo "$BUILDUSERNAME:!:::::::" >> $BUILDPLACE/etc/shadow
        fi
        if [ -e $BUILDPLACE/etc/gshadow ] && ! grep -q ^$BUILDUSERNAME: $BUILDPLACE/etc/gshadow; then
            cowprotect $BUILDPLACE/etc/gshadow
            echo "$BUILDUSERNAME:!::" >> $BUILDPLACE/etc/gshadow
        fi
        unset LOGNAME || true
    else
        unset LOGNAME || true
    fi
}

function setup_ccache() {
    if [ -n "$CCACHEDIR" ]; then
        log.i "Setting up ccache"
        if ! [ -d "$BUILDPLACE/$CCACHEDIR" ]; then
            mkdir -p "$BUILDPLACE/$CCACHEDIR"
        fi
        chown -R $BUILDUSERID:$BUILDUSERID "$BUILDPLACE/$CCACHEDIR"
        CCACHE_ENV="CCACHE_DIR=$CCACHEDIR"
        unset CCACHE_DIR
    fi
}

function binNMU() {
    if [ "$BIN_NMU" == "no" ]; then
        return
    fi
    if [ -z "$BINNMU_MESSAGE" ]; then
        log.e "No changelog message provided for binNMU entry."
        exit 1
    fi
    if [ -z "$BINNMU_VERSION" ]; then
        log.w "No version provided for binNMU entry, fall back to 1."
        BINNMU_VERSION=1
    fi
    log.i "Doing a binNMU, version $BINNMU_VERSION to '$BINNMU_MESSAGE'"
    local cl=$(ls "$BUILDPLACE"/"$BUILDDIR"/*/debian/changelog)
    local tmpcl=$(mktemp pbuilder.tmpchangelog.XXXXXXXXXXX)
    if [ ! -f "$cl" ]; then
        log.e "Cannot open debian/changelog for binNMU version handling."
        exit 1
    fi
    mv "$cl" "$tmpcl"
    local package=$(dpkg-parsechangelog -l "$tmpcl" -c 1 --show-field Source)
    local version=$(dpkg-parsechangelog -l "$tmpcl" -c 1 --show-field Version)
    local arch=$($CHROOTEXEC dpkg-architecture -qDEB_HOST_ARCH)
    local date=$(date -R)
    if [ -z "$BINNMU_MAINTAINER" ]; then
        log.w "No maintainer provided for binNMU entry, fall back to last uploader."
        BINNMU_MAINTAINER=$(dpkg-parsechangelog -l $tmpcl -c 1 --show-field Maintainer)
    fi
    if [ -z "$DISTRIBUTION" ]; then
        log.w "No distribution provided, using the field from the last upload"
        DISTRIBUTION=$(dpkg-parsechangelog -l "$tmpcl" -c 1 --show-field Distribution)
    fi
    DEBBUILDOPTS="${DEBBUILDOPTS} -e\"$BINNMU_MAINTAINER\""
    cat > "$cl" << EOF
$package ($version+b$BINNMU_VERSION) $DISTRIBUTION; urgency=low, binary-only=yes
  * Binary-only non-maintainer upload for $arch; no source changes.
  * $BINNMU_MESSAGE

 -- $BINNMU_MAINTAINER  $date

EOF
    cat "$tmpcl" >> "$cl"
    rm "$tmpcl"
}