#!/bin/sh

set -e

# This scripts generates either a choice or a menuconfig

# with the specified entries.

#

# Usage:

#   generate a choice:

#       gen_in_frags.sh choice <out-file> <label> <config-prefix> <base-dir> <conditionals> entry [entry...]

#

#   generate a menuconfig:

#       gen_in_frags.sh menu <out-file> <label> <config-prefix> <base-dir> entry [entry...]

#

# where:

#   out-file

#       put the generated choice/menuconfig into that file

#       for choices, it acts as the base bname of the file, the secondary

#       parts (the .in.2) are put in out-file.2

#

#   label

#       name for the entries family

#       eg. Architecture, Kernel...

#

#   config-prefix

#       prefix for the choice entries

#       eg. ARCH, KERNEL...

#

#   base-dir

#       base directory containing config files

#       eg. config/arch, config/kernel...

#

#   conditionals (valid only for choice)

#       generate backend conditionals if Y/y, don't if anything else

#       if 'Y' (or 'y'), a dependency on the backen mode will be added

#       to each entry

#

#   entry [entry...]

#       a list of entry/ies toadd to the choice/menuconfig

#       eg.:

#           arm mips sh x86...

#           linux cygwin mingw32 solaris...

#           ...

#

#------------------------------------------------------------------------------

# Generate a choice

# See above for usage

gen_choice() {

    local out_file="${1}"

    local label="${2}"

    local cfg_prefix="${3}"

    local base_dir="${4}"

    local cond="${5}"

    shift 5

    local file entry _entry

    # Generate the part-1

    exec >"${out_file}"

    printf '# %s menu\n' "${label}"

    printf '# Generated file, do not edit!!!\n'

    printf '\n'

    printf 'choice GEN_CHOICE_%s\n' "${cfg_prefix}"

    printf '    bool\n'

    printf '    prompt "%s"\n' "${label}"

    printf '\n'

    for entry in "${@}"; do

        file="${base_dir}/${entry}.in"

        _entry=$(printf '%s\n' "${entry}" |"${sed}" -r -s -e 's/[-.+]/_/g;')

        printf 'config %s_%s\n' "${cfg_prefix}" "${_entry}"

        printf '    bool\n'

        printf '    prompt "%s"\n' "${entry}"

        if [ "${cond}" = "Y" -o "${cond}" = "y" ]; then

            printf '    depends on %s_%s_AVAILABLE\n' "${cfg_prefix}" "${_entry}"

        fi

        "${sed}" -r -e '/^## depends on /!d; s/^## /    /;' ${file} 2>/dev/null

        "${sed}" -r -e '/^## select /!d; s/^## /    /;' ${file} 2>/dev/null

        if "${grep}" -E '^## help' ${file} >/dev/null 2>&1; then

            printf '    help\n'

            "${sed}" -r -e '/^## help ?/!d; s/^## help ?/      /;' ${file} 2>/dev/null

        fi

        printf '\n'

    done

    printf 'endchoice\n'

    for entry in "${@}"; do

        file="${base_dir}/${entry}.in"

        _entry=$(printf '%s\n' "${entry}" |"${sed}" -r -s -e 's/[-.+]/_/g;')

        printf '\n'

        if [ "${cond}" = "Y" -o "${cond}" = "y" ]; then

            printf 'config %s_%s_AVAILABLE\n' "${cfg_prefix}" "${_entry}"

            printf '    bool\n'

            printf '    default y if'

            printf ' BACKEND_%s = "%s"' "${cfg_prefix}" "${entry}"

            printf ' || BACKEND_%s = ""' "${cfg_prefix}"

            printf ' || ! BACKEND\n'

        fi

        printf 'if %s_%s\n' "${cfg_prefix}" "${_entry}"

        printf 'config %s\n' "${cfg_prefix}"

        printf '    default "%s" if %s_%s\n' "${entry}" "${cfg_prefix}" "${_entry}"

        printf 'source "%s"\n' "${file}"

        printf 'endif\n'

    done

    # Generate the part-2

    exec >"${out_file}.2"

    printf '# %s second part options\n' "${label}"

    printf '# Generated file, do not edit!!!\n'

    for entry in "${@}"; do

        file="${base_dir}/${entry}.in"

        _entry=$(printf '%s\n' "${entry}" |"${sed}" -r -s -e 's/[-.+]/_/g;')

        if [ -f "${file}.2" ]; then

            printf '\n'

            printf 'if %s_%s\n' "${cfg_prefix}" "${_entry}"

            printf 'comment "%s other options"\n' "${entry}"

            printf 'source "%s.2"\n' "${file}"

            printf 'endif\n'

        fi

    done

}

# Generate a menuconfig

# See above for usage

gen_menu() {

    local out_file="${1}"

    local label="${2}"

    local cfg_prefix="${3}"

    local base_dir="${4}"

    shift 4

    local file entry _entry

    # GEnerate the menuconfig

    exec >"${out_file}"

    printf '# %s menu\n' "${label}"

    printf '# Generated file, do not edit!!!\n'

    printf '\n'

    for entry in "${@}"; do

        file="${base_dir}/${entry}.in"

        _entry=$(printf '%s\n' "${entry}" |"${sed}" -r -s -e 's/[-.+]/_/g;')

        printf 'menuconfig %s_%s\n' "${cfg_prefix}" "${_entry}"

        printf '    bool\n'

        printf '    prompt "%s"\n' "${entry}"

        "${sed}" -r -e '/^## depends on /!d; s/^## /    /;' ${file} 2>/dev/null

        "${sed}" -r -e '/^## select /!d; s/^## /    /;' ${file} 2>/dev/null

        if "${grep}" -E '^## help' ${file} >/dev/null 2>&1; then

            printf '    help\n'

            "${sed}" -r -e '/^## help ?/!d; s/^## help ?/      /;' ${file} 2>/dev/null

        fi

        printf '\n'

        printf 'if %s_%s\n' "${cfg_prefix}" "${_entry}"

        printf 'source "%s"\n' "${file}"

        printf 'endif\n'

        printf '\n'

    done

}

type="${1}"

shift

"gen_${type}" "${@}"