#!/bin/sh
# install-reloc - install a program including a relocating wrapper
# Copyright (C) 2003-2013 Free Software Foundation, Inc.
# Written by Bruno Haible <bruno@clisp.org>, 2003.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Usage:
#   install-reloc library_path_var library_path_value prefix destdir \
#                 compile_command srcdir builddir config_h_dir exeext \
#                 strip_command \
#                 install_command... destprog
# where
#   - library_path_var is the platform dependent runtime library path variable
#   - library_path_value is a colon separated list of directories that contain
#     the libraries at installation time (use this instead of -rpath)
#   - prefix is the base directory at installation time
#   - destdir is a string that is prepended to all file names at installation
#     time; it is already prepended to destprog but not to library_path_value
#     and prefix
#   - compile_command is a C compiler compilation and linking command
#   - srcdir is the directory where to find relocwrapper.c and its dependencies
#   - builddir is the directory where to find built dependencies (namely,
#     alloca.h and stdbool.h)
#   - config_h_dir is the directory where to find config.h
#   - exeext is platform dependent suffix of executables
#   - strip_command is the command for stripping executables, or : if no
#     stripping is desired
#   - install_command is the install command line, excluding the final destprog
#   - destprog is the destination program name
# install-reloc renames destprog to destprog.bin and installs a relocating
# wrapper in the place of destprog.

progname=$0

if test $# -eq 2; then
  # Get arguments from environment variables.
  library_path_var=$RELOC_LIBRARY_PATH_VAR
  library_path_value=$RELOC_LIBRARY_PATH_VALUE
  prefix=$RELOC_PREFIX
  destdir=$RELOC_DESTDIR
  compile_command=$RELOC_COMPILE_COMMAND
  srcdir=$RELOC_SRCDIR
  builddir=$RELOC_BUILDDIR
  config_h_dir=$RELOC_CONFIG_H_DIR
  exeext=$RELOC_EXEEXT
  strip_prog=$RELOC_STRIP_PROG
  install_prog=$RELOC_INSTALL_PROG # including the "-c" option
else
  if test $# -ge 11; then
    # Get fixed position arguments.
    library_path_var=$1
    library_path_value=$2
    prefix=$3
    destdir=$4
    shift
    shift
    shift
    shift
    compile_command=$1
    srcdir=$2
    builddir=$3
    config_h_dir=$4
    exeext=$5
    shift
    shift
    shift
    shift
    shift
    strip_prog=$1
    shift
    install_prog=$1 # maybe not including the "-c" option
    shift
  else
    echo "Usage: $0 library_path_var library_path_value prefix destdir" \
         "compile_command srcdir builddir config_h_dir exeext" \
         "strip_command" \
         "install_command... destprog" 1>&2
    exit 1
  fi
fi

# Get destprog, last argument.
destprog=
for arg
do
  destprog=$arg
done
# Remove trailing $exeext, if present.
if test -n "$exeext"; then
  sed_quote='s,\.,\\.,g'
  sed_remove_exeext='s|'`echo "$exeext" | sed -e "$sed_quote"`'$||'
  destprog=`echo "$destprog" | sed -e "$sed_remove_exeext"`
fi

# Outputs a command and runs it.
func_verbose ()
{
  echo "$@"
  "$@"
}

# Run install_command.
func_verbose $install_prog "$@" || exit $?

# Run strip_command.
test "$strip_prog" = ':' || func_verbose "$strip_prog" "$destprog$exeext" || exit $?

# If the platform doesn't support LD_LIBRARY_PATH or similar, we cannot build
# a wrapper.
test -n "$library_path_var" || exit 0

libdirs=
save_IFS="$IFS"; IFS=":"
for dir in $library_path_value; do
  IFS="$save_IFS"
  if test -n "$dir"; then
    case "$libdirs" in
      *"\"$dir\""*) ;; # remove duplicate
      *) libdirs="$libdirs\"$dir\"," ;;
    esac
  fi
done
IFS="$save_IFS"
# If there are no library directories to add at runtime, we don't need a
# wrapper.
test -n "$libdirs" || exit 0

# Determine installdir from destprog, removing a leading destdir if present.
installdir=`echo "$destprog" | sed -e 's,/[^/]*$,,'`
if test -n "$destdir"; then
  sed_quote='s,\([|.\*^$[]\),\\\1,g'
  sed_remove_destdir='s|^'`echo "$destdir" | sed -e "$sed_quote"`'||'
  installdir=`echo "$installdir" | sed -e "$sed_remove_destdir"`
fi

# Compile wrapper.
func_verbose $compile_command \
             -I"$builddir" -I"$srcdir" -I"$config_h_dir" \
             -DHAVE_CONFIG_H -DIN_RELOCWRAPPER -DNO_XMALLOC \
             -D"INSTALLPREFIX=\"$prefix\"" -D"INSTALLDIR=\"$installdir\"" \
             -D"LIBPATHVAR=\"$library_path_var\"" -D"LIBDIRS=$libdirs" \
             -D"EXEEXT=\"$exeext\"" \
             "$srcdir"/relocwrapper.c \
             "$srcdir"/progname.c \
             "$srcdir"/progreloc.c \
             "$srcdir"/areadlink.c \
             "$srcdir"/careadlinkat.c \
             "$srcdir"/allocator.c \
             "$srcdir"/readlink.c \
             "$srcdir"/canonicalize-lgpl.c \
             "$srcdir"/malloca.c \
             "$srcdir"/relocatable.c \
             "$srcdir"/setenv.c \
             "$srcdir"/strerror.c \
             "$srcdir"/c-ctype.c \
             -o "$destprog.wrapper$exeext"
rc=$?
# Clean up object files left over in the current directory by the native C
# compilers on Solaris, HP-UX, OSF/1, IRIX.
rm -f relocwrapper.o \
      progname.o \
      progreloc.o \
      areadlink.o \
      careadlinkat.o \
      allocator.o \
      readlink.o \
      canonicalize-lgpl.o \
      malloca.o \
      relocatable.o \
      setenv.o \
      strerror.o \
      c-ctype.o
test $rc = 0 || exit $?
# Clean up debugging information left over by the native C compiler on Mac OS X.
rm -rf "$destprog.wrapper$exeext.dSYM"
test $rc = 0 || exit $?

# Strip wrapper.
test "$strip_prog" = ':' || func_verbose "$strip_prog" "$destprog.wrapper$exeext" || exit $?

# Rename $destprog.wrapper -> $destprog -> $destprog.bin.
ln -f "$destprog$exeext" "$destprog.bin$exeext" \
  || { rm -f "$destprog.bin$exeext" \
       && cp -p "$destprog$exeext" "$destprog.bin$exeext"; } \
  || exit 1
mv "$destprog.wrapper$exeext" "$destprog$exeext" || exit 1

exit 0