#############################################################################

# Copyright (c) 2008,2009 Novell, Inc.

# All Rights Reserved.

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of version 2 of the GNU General Public License as

# published by the Free Software Foundation.

#

# 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, contact Novell, Inc.

#

# To contact Novell about this file by physical or electronic mail,

# you may find current contact information at www.novell.com

#############################################################################

# to be sourced by scripts that need a GIT working directory

if git rev-parse HEAD >/dev/null 2>&1; then

    using_git=true

else

    using_git=false

    echo "WARNING: not in a GIT working directory, things might break." >&2

    echo >&2

fi

scripts_dir=$(dirname "$0")

get_branch_name()

{

    if $using_git; then

        # FIXME: guess a branch name when a non-branch revision is checked

        # out

        local res=$(sed -ne 's|^ref: refs/heads/||p' "$scripts_dir"/../.git/HEAD 2>/dev/null)

        echo "$res"

    fi

}

_find_tarball()

{

    local version=$1 dir subdir major

    set -- ${version//[.-]/ }

    major=$1.$2

    case "$major" in

    3.*)

        major=3.x

    esac

    for dir in . $MIRROR {/mounts,/labs,}/mirror/kernel; do

        for subdir in "" "/v$major" "/testing" "/v$major/testing"; do

            if test -r "$dir$subdir/linux-$version.tar.bz2"; then

                echo "$dir$subdir/linux-$version.tar.bz2"

                return

            fi

        done

    done

}

_get_tarball_from_git()

{

    local version=$1 tag url

    git=${LINUX_GIT:-$HOME/linux-2.6}

    if test ! -d "$git/.git"; then

        echo "No linux-2.6 git tree found (try setting the LINUX_GIT variable)" >&2

        exit 1

    fi

    case "$version" in

    *next-*)

        tag=refs/tags/next-${version##*next-}

        url=git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

        ;;

    [0-9]*-g???????)

        tag="v$version"

        url=git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

        ;;

    *)

        tag=refs/tags/"v$version"

        url=git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

    esac

    if ! git --git-dir="$git/.git" cat-file -e "$tag" 2>/dev/null; then

        case "$tag" in

        refs/tags/*)

            git --git-dir="$git/.git" fetch "$url" "$tag:$tag"

            ;;

        *)

            # v2.6.X.Y-rcZ-gabcdef1, not a real tag

            git --git-dir="$git/.git" fetch --tags "$url" \

                refs/heads/master:refs/tags/latest

        esac

    fi

    git --git-dir="$git/.git" archive --prefix="linux-$version/" "$tag"

}

get_tarball()

{

    local version=$1 dest=$2 tarball

    tarball=$(_find_tarball "$version")

    if test -n "$tarball"; then

        cp "$tarball" "$dest/linux-$version.tar.bz2.part" || exit

        mv "$dest/linux-$version.tar.bz2.part" "$dest/linux-$version.tar.bz2"

        return

    fi

    echo "Warning: could not find linux-$version.tar.bz2, trying to create it from git" >&2

    set -o pipefail

    _get_tarball_from_git "$version" | bzip2 -9 \

        >"$dest/linux-$version.tar.bz2.part"

    if test $? -ne 0; then

        exit 1

    fi

    mv "$dest/linux-$version.tar.bz2.part" "$dest/linux-$version.tar.bz2"

    set +o pipefail

}

unpack_tarball()

{

    local version=$1 dest=$2 tarball

    tarball=$(_find_tarball "$version")

    mkdir -p "$dest"

    if test -n "$tarball"; then

        echo "Extracting $tarball"

        tar -xjf "$tarball" -C "$dest" --strip-components=1

        return

    fi

    echo "Warning: could not find linux-$version.tar.bz2, trying to create it from git" >&2

    echo "alternatively you can put an unpatched kernel tree to $dest" >&2

    set -o pipefail

    _get_tarball_from_git "$version" | tar -xf - -C "$dest" --strip-components=1

    if test $? -ne 0; then

        rm -rf "$dest"

        exit 1

    fi

    set +o pipefail

}

if $using_git && test -z "$CHECKED_GIT_HOOKS"; then

    export CHECKED_GIT_HOOKS=1

    if ! "$scripts_dir"/install-git-hooks --check; then

        echo "WARNING: You should run $scripts_dir/install-git-hooks to enable pre-commit checks." >&2

    fi

    suse_domains_re='(suse\.(de|com|cz)|novell\.com)'

    kerncvs_re='(kerncvs(\.suse\.de)?|10\.10\.1\.75)'

    if (echo $EMAIL; hostname -f) | grep -Eiq "aaa[@.]$suse_domains_re\\>" || \

        git config remote.origin.url | grep -Eiq "\\<$kerncvs_re:"; then

        # only warn when used in suse

        if ! git var GIT_COMMITTER_IDENT | grep -Eiq "@$suse_domains_re>"; then

            echo "WARNING: You should set your suse email address in git"  >&2

            echo "WARNING: E.g. by running 'git config --global user.email <your login>@suse.de'" >&2

        fi

    fi

fi

# vim: sw=4:sts=4:et