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# -*- shell-script -*-
#
# Bash tab auto-completion rules for git-buildpackage.
#
# Copyright (C) 2010  Siegfried-Angel Gevatter Pujals <siegfried@gevatter.com>
# Copyright (C) 2010,2013  Guido Guenther <agx@sigxcpu.org>
#
# Distributed under the GNU General Public License, version 2.0.

_gbp_branches ()
{
     [ -d .git ] || return 0
     git  for-each-ref --format="%(refname:short)" refs/heads
}


_gbp_tags ()
{
     [ -d .git ] || return 0
     git  for-each-ref --format="%(refname:short)" refs/tags
}


_gbp_options ()
{
    $1 --help | sed -ne  's/^ \+\(\(\-[a-z]\), \)\?\(\-\-[a-z\-]\+\=\?\).*/\2 \3/p'
}


_gbp_comp ()
{
    local cur="${COMP_WORDS[COMP_CWORD]}"
    local prev="${COMP_WORDS[COMP_CWORD - 1]}"
    local options=$1
    local branch_opts=$2
    local tag_opts=$3
    local tristate_opts=$4

# COMPREPLY considers '=' as a word. For $prev we prefer the word before the actual "="
    if [[ "$prev" == "=" ]]; then
        prev="${COMP_WORDS[COMP_CWORD - 2]}"
    elif [[ "$cur" == "=" ]]; then
        cur=""
    fi

    if [[ "${branch_opts}" == *$prev* ]]; then
	local refs=$(_gbp_branches)
        COMPREPLY=( $(compgen -W "$refs" -- $cur ) )
        return 0
    fi

    if [[ "${tag_opts}" == *$prev* ]]; then
	local refs=$(_gbp_tags)
        COMPREPLY=( $(compgen -W "$refs" -- $cur ) )
        return 0
    fi

    if [[ "${tristate_opts}" == *$prev* ]]; then
        COMPREPLY=( $(compgen -W 'on off auto' -- $cur ) )
        return 0
    fi

    if [[ "${cbdist_opts}" == *$prev* ]]; then
        local BASE="/var/cache/pbuilder/base-"
        COMPREPLY=( $( compgen -o dirnames -G "${BASE}${cur}*.cow" \
                       | sed -e "s,${BASE}\(.*\)\.cow,\1,g" ) )
        return 0
    fi

    # separate opts by tab so we can append a space to all options not ending
    # with an equal sign
    tab_opts=$(echo "$options" | sed -e 's/ \+/\t/g' -e 's/[^=]$/& /g')
    type compopt &>/dev/null && compopt -o nospace
    local IFS=$'\t\n'
    COMPREPLY=($(compgen -W "$tab_opts" -- $cur))
}

# check if we can find a gbp command on the commandline
_gbp_find_cmd_on_cmdline ()
{
    local cmds="$1" # list of commands to check for
    local word cmd c=1

    while [ $c -lt $((COMP_CWORD)) ]; do
	word="${COMP_WORDS[c]}"
	for cmd in $cmds; do
	    if [ "$cmd" = "$word" ]; then
		echo "$cmd"
		return
	    fi
	done
	((c++))
    done
}

have git-buildpackage &&
_gbp_buildpackage()
{
    local options=$(_gbp_options git-buildpackage)
    local branch_opts="--git-debian-branch\= --git-upstream-branch\= --git-upstream-tree\="
    local tag_opts="--git-debian-tag\= --git-upstream-tag\="
    local tristate_opts="--git-color\= --git-notify\="
    local cbdist_opts="--git-dist\="

    _gbp_comp "$options" "$branch_opts" "$tag_opts" "$tristate_opts" \
              "$cbdist_opts"
}
[ "${have:-}" ] && complete -F _gbp_buildpackage -o default git-buildpackage


have git-dch &&
_gbp_dch ()
{
    local options=$(_gbp_options git-dch)
    local branch_opts="--debian-branch\="
    local tag_opts="--debian-tag\= --upstream-tag\="
    local tristate_opts="--color\="

    _gbp_comp "$options" "$branch_opts" "$tag_opts" "$tristate_opts"
}
[ "${have:-}" ] && complete -F _gbp_dch -o default git-dch


have git-import-orig &&
_gbp_import_orig ()
{
    local options=$(_gbp_options git-import-orig)
    local branch_opts="--debian-branch\= --upstream-branch\="
    local tag_opts="--debian-tag\= --upstream-tag\="
    local tristate_opts="--color\="

    _gbp_comp "$options" "$branch_opts" "$tag_opts" "$tristate_opts"
}
[ "${have:-}" ] && complete -F _gbp_import_orig -o default git-import-orig


have git-import-dsc &&
_gbp_import_dsc ()
{
    local options=$(_gbp_options git-import-dsc)
    local branch_opts="--debian-branch\= --upstream-branch\="
    local tag_opts="--debian-tag\= --upstream-tag\="
    local tristate_opts="--color\="

    _gbp_comp "$options" "$branch_opts" "$tag_opts" "$tristate_opts"
}
[ "${have:-}" ] && complete -F _gbp_import_dsc -o default git-import-dsc

have git-import-dscs &&
_gbp_import_dscs ()
{
    local options="$(_gbp_options git-import-dscs) $(_gbp_options git-import-dsc)"
    local branch_opts="--debian-branch\= --upstream-branch\="
    local tag_opts="--debian-tag\= --upstream-tag\="
    local tristate_opts="--color\="

    _gbp_comp "$options" "$branch_opts" "$tag_opts" "$tristate_opts"
}
[ "${have:-}" ] && complete -F _gbp_import_dscs -o default git-import-dscs

have gbp-pq &&
_gbp_pq ()
{
    local options=$(_gbp_options gbp-pq)
    options="$options export import rebase drop apply switch"
    local tristate_opts="--color\="

    _gbp_comp "$options" "" "" "$tristate_opts"
}
[ "${have:-}" ] && complete -F _gbp_pq -o default gbp-pq

have gbp-pull &&
_gbp_pull ()
{
    local options=$(_gbp_options gbp-pull)
    local branch_opts="--debian-branch\= --upstream-branch\="
    local tag_opts="--debian-tag\= --upstream-tag\="
    local tristate_opts="--color\="

    _gbp_comp "$options" "$branch_opts" "$tag_opts" "$tristate_opts"
}
[ "${have:-}" ] && complete -F _gbp_pull -o default gbp-pull

have gbp-clone &&
_gbp_clone ()
{
    local options=$(_gbp_options gbp-clone)
    local branch_opts="--debian-branch\= --upstream-branch\="
    local tag_opts="--debian-tag\= --upstream-tag\="
    local tristate_opts="--color\="

    _gbp_comp "$options" "$branch_opts" "$tag_opts" "$tristate_opts"
}
[ "${have:-}" ] && complete -F _gbp_clone -o default gbp-clone

have gbp-create-remote-repo &&
_gbp_create_remote_repo ()
{
    local options=$(_gbp_options gbp-create-remote-repo)
    local branch_opts="--debian-branch\= --upstream-branch\="
    local tristate_opts="--color\="

    _gbp_comp "$options" "$branch_opts" "" "$tristate_opts"
}
[ "${have:-}" ] && complete -F _gbp_create_remote_repo -o default gbp-create-remote-repo

have gbp &&
_gbp ()
{
    local cur="${COMP_WORDS[COMP_CWORD]}"
    local commands="buildpackage       \
                    clone              \
                    create-remote-repo \
                    dch                \
                    import-dsc         \
                    import-dscs        \
                    import-orig        \
                    pq                 \
                    pull"
    local func

    command=$(_gbp_find_cmd_on_cmdline "$commands")
    if [ -z $command ]; then
	COMPREPLY=( $(compgen -W "$commands" -- $cur ) )
    else
	func=_gbp_$(echo $command | sed -e 's/-/_/g')
	$func
    fi
}
[ "${have:-}" ] && complete -F _gbp -o default gbp