#!/bin/sh

set -e

# Adds a new version to one of the toolchain component

myname="$0"

# Parse the tools' paths configuration

# It is expected that this script is only to be run from the

# source directory of crosstool-NG, so it is trivial to find

# paths.mk (we can't use  ". paths.mk", as POSIX states that

# $PATH should be searched for, and $PATH most probably doe

# not include "."), hence the "./".

. "./paths.mk"

doHelp() {

    cat <<-EOF

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

		  'tool' in one of:

		    gcc, binutils, glibc, eglibc, uClibc, newlib, linux, gdb, dmalloc,

		    duma, strace, ltrace, libelf, gmp, mpfr, ppl, cloog, mpc

		  Valid options for all tools:

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

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

		    --experimental, -x, +s

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

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

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

		    --obsolete, -o, +c

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

		  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

}

# Extract field $3 from version $1 with separator $2

getVersionField() {

    local version="$1"

    local sep="$2"

    local field="$3"

    echo "${version}${sep}${sep}${sep}${sep}" |cut -d ${sep} -f ${field}

}

# 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="$2"

    local config_ver_option

    local exp_obs_prompt

    local deps v ver_M ver_m ver_p

    local SedExpr1 SedExpr2

    [ -f "${file}" ] || return 0

    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 -E "^config ${config_ver_option}$" "${file}" >/dev/null 2>&1; then

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

        grep -A1 -B0 -n                                                     \

             -E "^(config ${config_ver_option}| {4}prompt \"${version}\")$" \

             "${file}" /dev/null

        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"

            ;;

        *,) exp_obs_prompt=" (EXPERIMENTAL)"

            deps="    depends on EXPERIMENTAL"

            ;;

        *)  exp_obs_prompt=" (EXPERIMENTAL, OBSOLETE)"

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

            ;;

    esac

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

    SedExpr1="${SedExpr1}\""

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

    case "${tool}" in

        gcc)

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

            ver_M=$(getVersionField "${version}" . 1)

            ver_m=$(getVersionField "${version}" . 2)

            if [   \( ${ver_M} -eq 4 -a ${ver_m} -eq 6 \)  ]; then

                SedExpr1="${SedExpr1}\n    select CC_GCC_4_6"

            elif [ \( ${ver_M} -eq 4 -a ${ver_m} -eq 5 \)  ]; then

                SedExpr1="${SedExpr1}\n    select CC_GCC_4_5"

            elif [ \( ${ver_M} -eq 4 -a ${ver_m} -eq 4 \)  ]; then

                SedExpr1="${SedExpr1}\n    select CC_GCC_4_4"

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

                SedExpr1="${SedExpr1}\n    select CC_GCC_4_3"

            elif [ \( ${ver_M} -eq 4 -a ${ver_m} -eq 2 \)  ]; then

                SedExpr1="${SedExpr1}\n    select CC_GCC_4_2"

            fi

            ;;

        uClibc)

            # uClibc-0.9.30 and above need some love

            ver_M=$(getVersionField "${version}" . 1)

            ver_m=$(getVersionField "${version}" . 2)

            ver_p=$(getVersionField "${version}" . 3)

            if [    ${ver_M} -ge 1                                      \

                 -o ${ver_M} -eq 0 -a ${ver_m} -ge 10                   \

                 -o ${ver_M} -eq 0 -a ${ver_m} -eq 9 -a ${ver_p} -ge 30 ]; then

                SedExpr1="${SedExpr1}\n    select LIBC_UCLIBC_0_9_30_or_later"

            fi

            ;;

        gdb)

            # gdb-7.0 and above have special handling

            ver_M=$(getVersionField "${version}" . 1)

            if [ ${ver_M} -ge 7 ]; then

                SedExpr1="${SedExpr1}\n    select GDB_7_0_or_later"

            fi

            ;;

    esac

    SedExpr2="    default \"${version}\" if ${config_ver_option}"

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

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

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

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

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

        --newlib)   EXP=; OBS=; cat=LIBC_NEWLIB;    tool=newlib;    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;;

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

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

        --ppl)      EXP=; OBS=; cat=PPL;            tool=ppl;       tool_prefix=companion_libs;;

        --cloog)    EXP=; OBS=; cat=CLOOG;          tool=cloog;     tool_prefix=companion_libs;;

        --mpc)      EXP=; OBS=; cat=MPC;            tool=mpc;       tool_prefix=companion_libs;;

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

        # 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; }

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

            # Components have their version selection either

            # in the .in or the .in.2 file. Handle both.

            addToolVersion "$1" "${file_base}"

            addToolVersion "$1" "${file_base}.2"

            ;;

    esac

    shift

done