#!/bin/sh

set -e

# Adds a new version to one of the toolchain component

myname="$0"

# Parse the tools' paths configuration

. "paths.mk"

doHelp() {

    cat <<-EOF

Usage: ${myname} <tool> <[options] version [...]> ...

  'tool' in one of:

    --gcc, --binutils, --glibc, --eglibc, --uClibc, --linux,

    --gdb, --dmalloc, --duma, --strace, --ltrace, --libelf

    --gmp, --mpfr

  Valid options for all tools:

    --stable, -s, +x   (default)

      mark the version as being stable (as opposed to experimental)

    --experimental, -x, +s

      mark the version as being experimental (as opposed to stable)

    --current, -c, +o   (default)

      mark the version as being cuurent (as opposed to obsolete)

    --obsolete, -o, +c

      mark the version as being obsolete (as opposed to current)

  Note: setting a new tool resets to the defaults: 'stable' and 'current'.

  'version' is a valid version for the specified tool.

  Examples:

    add stable current version 2.6.19.2 to linux kernel:

      ${myname} --linux 2.6.19.2

    add experimental obsolete version 2.3.5 and stable current versions 2.6.1

    and 2.6.2 to glibc, add stable obsolete version 3.3.3 to gcc:

      ${myname} --glibc -x -o 2.3.5 -s -c 2.6.1 2.6.2 --gcc -o 3.3.3

EOF

}

# Effectively add a version to the specified tool

# $cat          : tool category

# $tool         : tool name

# $tool_prefix  : tool directory prefix

# $EXP          : set to non empty if experimental, to empty otherwise

# #OBS          : set to non empty if obsolete, to empty otherwise

# $1            : version string to add

addToolVersion() {

    local version="$1"

    local file

    local config_ver_option

    local exp_obs_prompt

    local deps v ver_M ver_m

    local SedExpr1 SedExpr2

    file="config/${tool_prefix}/${tool}.in"

    v=$(echo "${version}" |"${sed}" -r -e 's/-/_/g; s/\./_/g;')

    config_ver_option="${cat}_V_${v}"

    # Check for existing version: it can be legitimitate for an end-user

    # to try adding a new version if the one he/she wants is not listed.

    # But it can be the case where the version is hidden behind either one

    # of EXPERIMENTAL or OBSOLETE, so warn if the version is already listed.

    if (GREP_OPTIONS= grep -E "^config ${config_ver_option}$" "${file}" >/dev/null 2>&1); then

        echo "'${tool}': version '${version}' already present:"

        GREP_OPTIONS= grep -A3 -B0 -E "^config ${config_ver_option}$" "${file}"

        return 0

    fi

    SedExpr1="${SedExpr1}config ${config_ver_option}\n"

    SedExpr1="${SedExpr1}    bool\n"

    SedExpr1="${SedExpr1}    prompt \"${version}"

    case "${EXP},${OBS}" in

        ,)  ;;

        ,*) exp_obs_prompt="  (OBSOLETE)"

            deps="    depends on OBSOLETE\n"

            ;;

        *,) exp_obs_prompt="  (EXPERIMENTAL)"

            deps="    depends on EXPERIMENTAL\n"

            ;;

        *)  exp_obs_prompt="  (EXPERIMENTAL, OBSOLETE)"

            deps="    depends on EXPERIMENTAL && OBSOLETE\n"

            ;;

    esac

    [ -n "${exp_obs_prompt}" ] && SedExpr1="${SedExpr1}${exp_obs_prompt}"

    SedExpr1="${SedExpr1}\"\n"

    [ -n "${deps}" ] && SedExpr1="${SedExpr1}${deps}"

    if [ "${tool}" = "gcc" ]; then

        # Extract 'M'ajor and 'm'inor from version string

        ver_M=$(echo "${version}...." |cut -d . -f 1)

        ver_m=$(echo "${version}...." |cut -d . -f 2)

        if [    ${ver_M} -gt 4                          \

             -o \( ${ver_M} -eq 4 -a ${ver_m} -ge 3 \)  ]; then

            SedExpr1="    select CC_GCC_4_3_or_later\n"

        fi

    fi

    SedExpr2="    default \"${version}\" if ${cat}_V_${v}"

    "${sed}" -r -i -e 's/^(# CT_INSERT_VERSION_ABOVE)$/'"${SedExpr1}"'\n\1/;' "${file}"

    "${sed}" -r -i -e 's/^(# CT_INSERT_VERSION_STRING_ABOVE)$/'"${SedExpr2}"'\n\1/;' "${file}"

}

cat=

tool=

tool_prefix=

VERSION=

EXP=

OBS=

if [ $# -eq 0 ]; then

    doHelp

    exit 1

fi

while [ $# -gt 0 ]; do

    case "$1" in

        # Tools:

        --gcc)      EXP=; OBS=; cat=CC;        tool=gcc;      tool_prefix=cc;;

        --binutils) EXP=; OBS=; cat=BINUTILS;  tool=binutils; tool_prefix=;;

        --glibc)    EXP=; OBS=; cat=LIBC;      tool=glibc;    tool_prefix=libc;;

        --eglibc)   EXP=; OBS=; cat=LIBC;      tool=eglibc;   tool_prefix=libc;;

        --uClibc)   EXP=; OBS=; cat=LIBC;      tool=uClibc;   tool_prefix=libc;;

        --linux)    EXP=; OBS=; cat=KERNEL;    tool=linux;    tool_prefix=kernel;;

        --gdb)      EXP=; OBS=; cat=GDB;       tool=gdb;      tool_prefix=debug;;

        --dmalloc)  EXP=; OBS=; cat=DMALLOC;   tool=dmalloc;  tool_prefix=debug;;

        --duma)     EXP=; OBS=; cat=DUMA;      tool=duma;     tool_prefix=debug;;

        --strace)   EXP=; OBS=; cat=STRACE;    tool=strace;   tool_prefix=debug;;

        --ltrace)   EXP=; OBS=; cat=LTRACE;    tool=ltrace;   tool_prefix=debug;;

        --libelf)   EXP=; OBS=; cat=LIBELF;    tool=libelf;   tool_prefix=tools;;

        --gmp)      EXP=; OBS=; cat=GMP;       tool=gmp;      tool_prefix=gmp_mpfr;;

        --mpfr)     EXP=; OBS=; cat=MPFR;      tool=mpfr;     tool_prefix=gmp_mpfr;;

        # Tools options:

        -x|--experimental|+s)   EXP=1;;

        -s|--stable|+x)         EXP=;;

        -o|--obsolete|+c)       OBS=1;;

        -c|--current|+o)        OBS=;;

        # Misc:

        -h|--help)  doHelp; exit 0;;

        -*)         echo "Unknown option: '$1' (use -h/--help for help)."; exit 1;;

        # Version string:

        *)  [ -n "${tool}" ] || { doHelp; exit 1; }

            addToolVersion "$1"

            ;;

    esac

    shift

done