#!/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_${type}" "${@}"