mkimagedep.sh

C++ 编写的EROS RTOS

#!/bin/sh
#
# Copyright (C) 1998, 1999, Jonathan Adams.
# Copyright (C) 2001, The EROS Group
#
# This file is part of the EROS Operating System.
#
# 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 2,
# 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, write to the Free Software
# Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#

usage() {
   echo  usage: "$0" -o outfile [cppopts] imgfile genfile >&2
   echo "        Should be the same options you send to mkimage, plus" >&2
   echo "        the name that you want the dependancy file to have." >&2      
   
   exit 1
}

OUTFILE=""
INFILE=""
CPPARGS=""

STDINC="-I${EROS_ROOT}/include"

if [ -z "${EROS_ROOT}" ]; then
  echo "Hey! You don't have EROS_ROOT in your environment!" >&2
  exit 1;
fi

# this code relies on EROS_ROOT not containing :s and spaces.  
# Let's check the assumption.
if echo "${EROS_ROOT}" | grep -q '[: ]'; then
  echo "Hey! Invalid EROS_ROOT (contains :s or spaces)" >&2
  exit 1
fi

# NOTE:  This needs to be updated if the args to mkimage or it's processing
#        of them change!
#
#    Also, this functionality may want to move into mkimage.
#
set -- `getopt o:dvn:I:A:D: "$@"`
if test $? != 0; then
   usage
fi
for i; do
   case "$i"
   in
      -I)
           CPPARGS="${CPPARGS} -I`echo $2 | sed 's:^/eros:'${EROS_ROOT}':'`"
           shift 2;
         ;;
      -D|-A)
           CPPARGS="${CPPARGS} $1$2"
           shift 2;
         ;;
      -n)
           if test "$2" = "ostdinc"; then
             STDINC=""
             CPPARGS="${CPPARGS} -nostdinc"
             shift 2;
           else
             usage
           fi
         ;;
      -d)
           shift
         ;;
      -v)
           shift
         ;;
      -o)
           OUTFILE=$2
           shift 2
         ;;
      --)
           shift; break
         ;;
   esac
done

CPPARGS="${CPPARGS} ${STDINC}"

if test $# -ne 2 -a $# -ne 1; then
   usage
fi

INFILE="$1"
GENFILE="$2"

if test \! -f "${INFILE}"; then
   echo "${INFILE}: not a regular file" >&2
   exit 1;
fi

if test -z "${OUTFILE}"; then
   echo "no target file specified!" >&2
   exit 1;
fi

if echo "${INFILE}${OUTFILE}${GENFILE}" | grep -q '[@: ]'; then
   echo "file names must not contain @, :, or spaces" >&2
   exit 1;
fi

# open up GENFILE as stdout
exec > "${GENFILE}" \
  || { echo "Error opening ${GENFILE} for writing" >&2; exit 1; }

ERRFILE="/tmp/.$$_mkimagedep_error"
while [ -f "${ERRFILE}" ]; do ERRFILE="${ERRFILE}_`date`"; done

# the || touch ${ERRFILE} stuff lets us detect any part of the pipe
#returning an error code.

# let cpp generate the include dependencies, and add the generated file to it.
{ /lib/cpp -M ${CPPARGS} ${INFILE} || touch "${ERRFILE}"; } \
  | { sed 's@'"${INFILE}"'.o:@'"${OUTFILE} ${GENFILE}:"'@g' \
     || touch "${ERRFILE}" ;} 

if [ -f "${ERRFILE}" ]; then
  rm -f "${ERRFILE}"
  exit 1
fi

echo "${OUTFILE}: ${INFILE} \\"
# Comments are below.
{ /lib/cpp ${CPPARGS} ${INFILE} || touch "${ERRFILE}"; } \
  | { sed -e 's:number *(\( *\"[^\"]*\" *\)*)::g' \
           -e '/^[^#]*\(\"[^\"]*\"[^\"]*\)\+$/ !d' \
           -e 's:[^"]*\"\([^\"]*\)"[^\"]*:\1:g' \
           -e 's:/eros/:'" ${EROS_ROOT}/"':g' \
           -e 's:^\(.*\)$:\1 \\:g' \
           -e 's:^\(.*\): \1:g' \
      || touch "${ERRFILE}"; } \
  | sort | uniq \
  | { sed -e '$ s: \\$::g' || touch "${ERRFILE}"; }

if [ -f "${ERRFILE}" ]; then
  rm -f "${ERRFILE}"
  exit 1
fi

# the above generates the file dependencies -- this uses a pipeline which:
#   1.  Runs the input through cpp to put in all the included stuff, remove
#      comments, and generally clean up the input
#
#   2.  Takes the preprocessed output and runs it through a complex
#      sed script.  The actions of the script, line by line, are:
#
#        1. 's:number *(\( *\"[^\"]*\" *\)*)::g'
#          Delete anything of the form 'number("string" "string"... )',
#          because these really are strings, not file names.
#
#        2. '/^[^#]*\(\"[^\"]*\"[^\"]*\)\+$/ !d'
#          KEEP all lines which do not have a # in their beginnings and 
#         which have an even number of quotes in them. 
#         (the # lines are the preprocessor's line number information)
#         (the ! inverts the effect of the match)
#
#        3. 's:[^"]*\"\([^\"]*\)"[^\"]*:\1:g' 
#          Removes all non-quoted parts of the line, resulting in 
#         list consisting only of the quoted parts, with quotes removed.
#
#        4. 's:/eros/:'" ${EROS_ROOT}/"':g' 
#          Replaces all references to /eros with the current value of
#         ${EROS_ROOT}.
#
#        5. 's:^\(.*\)$:\1 \\:g'
#          Adds a backslash to the end of each line
#
#        6. 's:^\(.*\): \1:g' \
#          Adds a space at the beginning of all dependency lines for
#         readability.
#
#   3.  pipe this through sort and uniq to get rid of duplicates.
# 
#   4.  Takes these results and passes them through a sed script which 
#      removes the last backslash, since it is unneeded and wrong. 
#
# This script will work if the following assumptions are met:
#   1.  The only quoted passages in preprocessed nmkimage files are the
#      imported binary files.
#
#   2.  Quotes cannot be split as in C (i.e. "foo" "bar" is not valid)
#
#   3.  Quotations are not split across lines
#
#   4.  Filenames do *not* contain whitespace characters.
#
#   5.  EROS_ROOT does not contain ':'s
#
#   6.  INFILE, GENFILE, OUTFILE do not contain ':'s or '@'s.