#!/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, 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

 }

 # 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