#!/bin/bash

_deploy_item() {
    #
    # Deploy item and make it look like wanted
    #
    # usage: _deploy_item src dst [mode]
    #
    # Both src and dst must be names of actual items[1],
    # whereas dst must not exist.  On update, dst is
    # usually to be replaced but that is uninstall's
    # job!
    #
    #  [1] Ie. src=foo and dst=/foo/bar does *always*
    #      mean that foo will become 'bar'.  This is
    #      different than traditional `cp` behavior,
    #      when this depends if 'bar' already exists
    #      as a directory.
    #
    # If mode is omitted or empty, MKIT_DEFAULT_MODE is
    # used instead.
    #
    # Directories are copied recursively, and mode is
    # applied only to files.
    #
    local src="$1"
    local dst="$2"
    local mode="${3:-$MKIT_DEFAULT_MODE}"
    if test -d "$src";
    then
        _maybe mkdir -vp "$(dirname "$dst")"
        _maybe cp -Tvr "$src" "$dst"
        find "$dst" -type f \
          | while read chmod_item;
            do
                _maybe chmod "$mode" "$chmod_item"
            done
    else
        _maybe install -DTvm "$mode" "$src" "$dst"
    fi
}

_get_dst() {
    #
    # Find out target path for src file $2 of group $1
    #
    local grp=$1
    local src=$2
    local dst=$3
    test -n "$dst" || dst=${src##*/}
    echo "$(_get_root "$grp")/$dst"
}

_get_root() {
    #
    # Find out target root for group $1
    #
    local grp="$1"
    local root=$(ini 1value "roots:$grp")
    local destdir=$(ini 1value ENV:DESTDIR)
    destdir=${destdir%/}
    case $destdir:$root in
        *:)     die "missing in config.ini: roots:$grp" ;;
        :*)     echo "$root" ;;
        *:*)    echo "$destdir/$root" ;;
    esac
}

_maybe() {
    #
    # Call the deploy command $1 $@ unless in dry mode
    #
    debug "$@"
    local cmd="$1"; shift
    $MKIT_DRY && return
    case "$cmd" in
        cp|rm|rmdir|chmod|mkdir) $cmd "$@" ;;
        install)                 command -p install "$@" ;;
        *)                       die "bad command called";;
    esac
}

install() {
    #
    # Install product
    #
    local dst group mode src
    ini lskeys "files" \
      | sort \
      | uniq \
      | while read group;
        do
            mode=$(ini 1value "modes:$group")
            ini values "files:$group" \
              | while read src dst;
                do
                    dst=$(_get_dst "$group" "$src" "$dst")
                    _deploy_item "$src" "$dst" "$mode"
                done
        done
    test -f "$MKIT_LOCAL/autoclean" && clean
    true
}

uninstall() {
    #
    # Uninstall product
    #
    local dst group src
    ini lskeys "files" \
      | sort \
      | uniq \
      | while read group;
        do
            ini values "files:$group" \
              | while read src dst;
                do
                    dst=$(_get_dst "$group" "$src" "$dst")
                    _maybe rm -vrf "$dst"
                done
        done
}