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#!/bin/bash
# BEGIN_ICS_COPYRIGHT8 ****************************************
# 
# Copyright (c) 2015, Intel Corporation
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 
#     * Redistributions of source code must retain the above copyright notice,
#       this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of Intel Corporation nor the names of its contributors
#       may be used to endorse or promote products derived from this software
#       without specific prior written permission.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# 
# END_ICS_COPYRIGHT8   ****************************************
# This script will create a basic makefile for all the source code
# files found in the present directory.

#
# It handles the following special cases automatically:
#	if the directory name is Test, a unit test makefile is build
#		to unit test the parent directory's library
#	if the directory is a top level directory, a project makefile is built
#	if the directory is a middle level directory, a middle makefile is built
#	if the directory is sub-directory of a module which has a
#		Makerules.module file, a module sub-directory makefile is built
#		(it is best to build the module top level makefile first
#		then buildMakefile for sub-directories will properly build)
#	For other directories, a library Makefile is built
#	Any source files which should not be processed by the Makefile
#	should have the strings: "INTERNAL USE ONLY" or "DO NOT BUILD"
#	"INTERNAL USE ONLY" should be used for non-public headers
#	"DO NOT BUILD" should be used for source which is not ready yet
#
# In update mode (-u) an existing makefile is rebuilt, retaining selected
# customizations.  The original is renamed Makefile-old
#
# Other Options:
#	-x - create a makefile for building an executable
#	-d - create a makefile for building a driver
#	-k - create a makefile for building a darwin kernel extension
#	-s - create a makefile for building a shared library
#	-a - create a makefile for building an archive library (the default)
#	-m - create a makefile for the toplevel directory of a module
#	-c dir - create a makefile which builds code from this directory and dir
#			(dir is relative to MOD_DIR)
#			this option is only valid within a module style tree
#	-p project - project name, default is current dir name

# Known Limitations:
#	The update option (-u) only handles LOCALDEPLIBS and DS_SUBPROJECTS
#		other customizations will be lost
#	All include files will be installed as visible to other modules
#		one exception is file containing the string "INTERNAL USE ONLY"
#		on "DO NOT BUILD"
#	out of the ordinary situations are not handled
#	all non-special sub-directories are simply included in the Makefile
#	.rc, .idl, .def files not handled
#	misc source files not handled
#	building of shared libraries not handled
#	building makefiles for integration tests is not supported

. $ICSBIN/funcs.sh

tempFiles=
foundSource=n
# This will always be run when we exit, so it can do all our cleanup
trap 'rm -f $tempFiles' 0 1 2 9 15

Usage() {
	echo "Usage: buildMakefile [-p project] [-u] [-m] [-c dir] [-x|-sad]" >&2
		echo "   -p project   project name, default is current dir name" >&2
        echo "   -x   create a makefile for building an executable" >&2
        echo "   -d   create a makefile for building a driver" >&2
		echo "   -k   create a makefile for building a darwin kernel extension" >&2
        echo "   -s   create a makefile for building a shared library" >&2
        echo "   -a   create a makefile for building an archive library (the default)" >&2
		echo "   -m   create a makefile for the toplevel directory of a module" >&2
		echo "   -c dir   create a makefile which builds code from this directory and dir" >&2
		echo "            (dir is relative to MOD_DIR)" >&2
		echo "            this option is only valid within a module style tree" >&2
        echo "   -u   In update mode (-u) an existing makefile is rebuilt, retaining selected" >&2
        echo "        customizations.  The original is renamed Makefile-old" >&2
        
        
	exit 2
}

grepValue()
{
	# grep for the value of a variable in the present Makefile
	# $1 = variable name
	# returns on stdout, the value of the variable
	# leading spaces are removed from the value
	grep "^$1" Makefile|cut -f2- -d=|sed -e's/^[ 	]*//'
}


uflag=n
xflag=n
sflag=n
aflag=n
dflag=n
kflag=n
mflag=n
cdir=
project=
while getopts uxsadkmc:p: opt
do
	case $opt in
	u) uflag=y;;
	x) xflag=y;;
	s) sflag=y;;
	a) aflag=y;;
	d) dflag=y;;
	k) dflag=y	# -d implied by -k
		kflag=y;;
	m) mflag=y;;
	c) cdir=$OPTARG;;
	p) project=$OPTARG;;
	?) Usage;;
	esac
done
shift `expr $OPTIND - 1`
if [ $# != 0 ]
then
	Usage
fi
if [ "$xflag" = y ]
then
	if [ "$aflag" = y -o "$sflag" = y -o "$dflag" = y ]
	then
		Usage
	fi
fi

if [ -f Makefile ]
then
	if [ "$uflag" = n ]
	then
		echo "buildMakefile aborted.  A Makefile already exists in this directory!" >&2
		echo "To update an existing makefile, use buildMakefile -u" >&2
		exit 1
	else
		ds_subprojects=`grepValue DS_SUBPROJECTS`
		shlib_version=`grepValue SHLIB_VERSION`
		localdeplibs=`grepValue LOCALDEPLIBS`
		clocal=`grepValue CLOCAL`
		cclocal=`grepValue CCLOCAL`
		copt=`grepValue COPT`
		ccopt=`grepValue CCOPT`
		local_include_dirs=`grepValue LOCAL_INCLUDE_DIRS`
		libfiles=`grepValue LIBFILES`
		mv Makefile Makefile-old
	fi
else
	ds_subprojects=""
	shlib_version=""
	localdeplibs=""
	clocal=""
	cclocal=""
	copt=""
	ccopt=""
	if [ "$mflag" = y ]
	then
		libfiles='FILL IN libraries built to $(MOD_LIB_DIR)'
	else
		libfiles=
	fi
	if [ "$uflag" = y ]
	then
		uflag=n	# ignore -u, no existing makefile
		echo "buildMakefile: ignoring -u, no existing Makefile"
	fi
fi

extractModuleDir()
{
	# extract the module sub-directory from a full path
	# and set module_dir to the resulting sub-directory path
	# $1 = full path to module (should be within TL_DIR)
	module_dir=`expr "$1" : "$TL_DIR/\(.*\)"`
}
	
findModuleDir()
{
	# sets module_dir to the sub-directory under TL_DIR for this module
	# if this is not a module, module_dir is set to ""
	# uses $TL_DIR
	full_module_dir="$pwd"
	while [ ! -f "$full_module_dir/Makerules.module" ]
	do
		full_module_dir=`dirname $full_module_dir`
		if [ "$full_module_dir" = "/" -o "$full_module_dir" = "$TL_DIR" -o -f "$full_module_dir"/Makerules/Makerules.global ]
		then
			full_module_dir=""
			module_dir=""
			return
		fi
	done

	extractModuleDir "$full_module_dir"
}


formatFileList()
{
	# Create a variable specifying a source file list
	# and output the value to the given temp file
	# $1 = output temp file name
	# $2 = list of directories to process
	# $3 = prefix to use for filenames not in directory .
	#		cheat for now, assumes dir list is only . and 1 other
	#		hence we can get away with a single prefix
	# $4 = list of extra filenames to explicitly add to list
	# $5 = heading to declare variable for list
	# $6 ... = suffixes for files to include in list
	output=$1
	list_dirs=$2
	dir_prefix=$3
	extra="$4"
	heading=$5
	shift; shift; shift; shift; shift
	echo "$heading \\" > $output
	{
		for file in $extra
		do
			echo "				$file \\"
		done
		for suffix in $*
		do
			for dir in $list_dirs
			do
				for i in $dir/*.$suffix
				do
					if [ -f "$i" ]
					then
						foundSource=y
						base=`basename $i`
						if egrep 'DO NOT BUILD|INTERNAL USE ONLY' $i > /dev/null
						then
							> /dev/null
						elif [ "$base" != "$extra" ]
						then
							# This is a cheat, should test extra as a list, but for now we know it only has 1 filename
							if [ "$dir" != "." -a "$dir_prefix" != "" ]
							then
								echo "				$dir_prefix/$base \\"
							else
								echo "				$base \\"
							fi
						fi
					fi
				done
			done
		done
	} > temp$$
	sort < temp$$ >> $output
	echo "				# Add more $* files here" >> $output
	rm -f temp$$
	tempFiles="$tempFiles $output temp$$"
}

formatVariable()
{
	# Create a variable specifying a target file or 1 line list
	# and output the value to the given temp file
	# $1 = output temp file name
	# $2 = heading to declare variable
	# $3 = value for variable
	if [ "$2" = "" ]
	then
		> $1
	else
		echo "$2 $3" > $1
	fi
	tempFiles="$tempFiles $1"
}

formatOptionalVariable()
{
	# Create a variable specifying a target file or 1 line list
	# and output the value to the given temp file
	# If the value ($3) is null, an empty file is created
	# $1 = output temp file name
	# $2 = heading to declare variable
	# $3 = value for variable
	if [ x"$3" = "x" ]
	then
		formatVariable "$1" "" ""
	else
		formatVariable "$1" "$2" "$3"
	fi
}

formatRule()
{
	# Create a makefile rule line
	# and output the line to the given temp file
	# $1 = output temp file name
	# $2 = rule line
	echo -e "$2" > $1
	tempFiles="$tempFiles $1"
}

CommonMakefileEdits()
{
# Edits of Makefile applicable to most Makefiles
ex Makefile <<!
/^DS_SUBPROJECTS/d
.-1
r DS_SUBPROJECTS.tmp
/^EXECUTABLE/d
.-1
r EXECUTABLE.tmp
/^DIRS/d
.-1
r DIRS.tmp
/^CFILES/d
.-1
r CFILES.tmp
/^CCFILES/d
.-1
r CCFILES.tmp
/^LFILES/d
.-1
r LFILES.tmp
/^LIBFILES/d
.-1
r LIBFILES.tmp
/^INCLUDE_TARGETS/d
.-1
r INCLUDE_TARGETS.tmp
/^DSP_SOURCES/
.+1
s/\$(MAKEFILE)/\$(MAKEFILE) $message_file/
/^LIB_TARGETS_ARLIB/d
.-1
r LIB_TARGETS_ARLIB.tmp
/^SHLIB_VERSION/d
.-1
r SHLIB_VERSION.tmp
/^CMD_TARGETS_SHLIB/d
.-1
r CMD_TARGETS_SHLIB.tmp
/^CMD_TARGETS_DRIVER/d
.-1
r CMD_TARGETS_DRIVER.tmp
/^CMD_TARGETS_KEXT/d
.-1
r CMD_TARGETS_KEXT.tmp
/^CLEAN_TARGETS_MISC/d
.-1
r CLEAN_TARGETS_MISC.tmp
/^LOCALDEPLIBS/d
.-1
r CLOCAL.tmp
r CCLOCAL.tmp
r LOCAL_INCLUDE_DIRS.tmp
r LOCALDEPLIBS.tmp
/Makerules.project/d
.-1
r rules.tmp
/Overrides/
/^#=====/
.-1
r COPT.tmp
r CCOPT.tmp
/runtest/d
.-1
r runtest.tmp
w
q
!
}

buildProjectMakefile()
{
	if [ ! -f Makerules.project ]
	then
		sed -e "s/<FILL IN PROJECT NAME>/$project/" < $TL_DIR/MakeTemplates/Makerules.project > Makerules.project
	fi
	sed -e "s/<FILL IN PROJECT NAME>/$project/" < $TL_DIR/MakeTemplates/Makefile.projHeading > Makefile
	cat $TL_DIR/MakeTemplates/Makefile.basic >> Makefile
	CommonMakefileEdits
	ex Makefile <<!
/^DSP_SOURCES/
.+1
s/\$(MAKEFILE)/\$(MAKEFILE) Makerules.project/
w
q
!
	echo "edit BSP_SPECIFIC_DIRS line in Makefile"
}

buildModuleMakefile()
{
	if [ ! -f Makerules.module ]
	then
		sed -e "s/<FILL IN MODULE NAME>/$project/" < $TL_DIR/MakeTemplates/Makerules.module > Makerules.module
		ex Makerules.module <<!
/^MOD_DIR/d
.-1
r MOD_DIR.tmp
w
q
!
	fi
	sed -e "s/<FILL IN MODULE NAME>/$project/" < $TL_DIR/MakeTemplates/Makefile.modHeading > Makefile
	cat $TL_DIR/MakeTemplates/Makefile.basic >> Makefile
	CommonMakefileEdits
	ex Makefile <<!
/^DSP_SOURCES/
.+1
s/\$(MAKEFILE)/\$(MAKEFILE) Makerules.module/
/Maketargets.install/
s/Maketargets.install/Maketargets.moduleinstall/
/Maketargets.stage/
s/Maketargets.stage/Maketargets.modulestage/
/runtest/
a

clobber:: clobber_module
.
w
q
!
}

buildBasicMakefile()
{
	# Create a basic Makefile using the temp files created
	echo "# Makefile for ${project}" > Makefile
	echo >> Makefile
	if [ "$foundSource" = n ]
	then
		cat $TL_DIR/MakeTemplates/Makefile.middle >> Makefile
		ex Makefile <<!
/^DS_SUBPROJECTS/d
.-1
r DS_SUBPROJECTS.tmp
/^DIRS/d
.-1
r DIRS.tmp
/Makerules.project/d
.-1
r rules.tmp
w
q
!
	else
		cat $TL_DIR/MakeTemplates/Makefile.basic >> Makefile
		CommonMakefileEdits
	fi
}

rm -f $tempFiles

TL_DIR=`findTopDir`
pwd=`pwd`

if [ -f Makerules/Makerules.global ]
then
	projectDir=y
	if [ "$mflag" = y ]
	then
		echo "Project level directories cannot be module Makefiles" 2>&1
		exit 1
	fi
	module_dir=""
else
	projectDir=n
	if [ "$mflag" = y ]
	then
		extractModuleDir "$pwd"
	else
		findModuleDir
	fi
fi
dirName=`basename $pwd`
if [ "$cdir" != "" -a "$module_dir" = "" ]
then
	echo "-c option is not valid outside a module Makefile tree" 2>&1
	exit 1
fi

# find all directories
dirs=
for i in *
do
	if [ -d "$i" -a "$i" != CVS -a "$i" != "builtbin" -a "$i" != builtinclude \
		 -a "$i" != builtlibs -a "$i" != stage -a "$i" != Makerules \
		 -a "$i" != MakeTools \
		 -a "$i" != MakeTemplates -a "$i" != CodeTemplates ]
	then
		if [ "$i" = Test ]
		then
			# translate to make variable so unit tests are optional
			i='$(TEST)'
		fi
		if [ "$dirs" = "" ]
		then
			dirs="$i"
		else
			dirs="$dirs $i"
		fi
	fi
done

if [ -f "$dirName".msg ]
then
	# Message files to be built
	message_file="${dirName}.msg"
	message_hfile="${dirName}_Messages.h"
	message_cfile="${dirName}_Messages.c"
elif [ "$cdir" != "" -a -f "$dirName".msg ]
then
	# Message files to be built from common dir
	message_file="${dirName}.msg"
	message_hfile="${dirName}_Messages.h"
	message_cfile="${dirName}_Messages.c"
else
	message_file=""
	message_hfile=""
	message_cfile=""
fi

formatVariable DIRS.tmp 'DIRS			=' "$dirs"

if [ "$cdir" != "" ]
then
	file_dirs=". $full_module_dir/$cdir"
else
	file_dirs="."
fi
formatFileList CFILES.tmp "$file_dirs" "" "$message_cfile" "CFILES			=" c
formatFileList CCFILES.tmp "$file_dirs" "" "" "CCFILES			=" cpp
formatFileList LFILES.tmp "$file_dirs" "" "" "LFILES			=" lex
foundCode=$foundSource
formatFileList INCLUDE_TARGETS.tmp "$file_dirs" "\$(COMMON_SRCDIR)" "$message_hfile" "INCLUDE_TARGETS	=" h hpp
formatVariable CLEAN_TARGETS_MISC.tmp 'CLEAN_TARGETS_MISC	=' "$message_hfile $message_cfile"

if [ "$project" = "" ]
then
	project="$dirName"
fi
if [ "$dirName" = "Test" ]
then
	if [ "$mflag" = y ]
	then
		echo "Module makefiles cannot be Unit Test directories" 2>&1
		Usage
	fi
	# Unit Test
	parent=`dirname $pwd`
	parent=`basename $parent`
	project=${parent}_Test
	libTarget=n
	exeTarget=y
	driverTarget=n
	kextTarget=n
	if [ "$uflag" = n ]
	then
		ds_subprojects="$parent Osa Gen Log Err Rai UiUtil UTest"
		localdeplibs="$parent Osa Gen Log Err Rai UiUtil UTest"
	fi
	formatRule runtest.tmp 'include $(TL_DIR)/Makerules/Maketargets.runtest'
else
	# TBD other tests, projectDir should be y for exe, check for a main?
	# if we didn't find any real code files (just headers)
	# we don't build a library nor executable
	if [ "$foundCode" = y -a "$dflag" != y ]
	then
		libTarget=y
		exeTarget=n
		driverTarget=n
		kextTarget=n
	else
		libTarget=n
		exeTarget=n
		driverTarget=n
		kextTarget=n
	fi
	formatRule runtest.tmp '#include $(TL_DIR)/Makerules/Maketargets.runtest'
fi
# -x, -a and -s, -d override the above heuristics
if [ "$xflag" = y ]
then
	exeTarget=y
	libTarget=n
elif [ "$sflag" = y -o "$aflag" = y ]
then
	exeTarget=n
	libTarget=y
fi
if [ "$dflag" = y ]
then
	driverTarget=y
fi
if [ "$kflag" = y ]
then
	kextTarget=y
fi

arlib=""
shlib=""
driver=""
kext=""
if [ "$libTarget" = y ]
then
	if [ "$sflag" = y ]
	then
		shlib='$(LIB_PREFIX)'"${project}"'$(SHLIB_VERSION_SUFFIX)'
		if [ "$shlib_version" = "" ]
		then
			shlib_version="0.0"
		fi
	fi
	if [ "$aflag" = y -o "$sflag" = n ]
	then
		arlib='$(LIB_PREFIX)'"${project}"'$(ARLIB_SUFFIX)'
	fi
fi
if [ "$driverTarget" = y ]
then
	driver="${project}"'$(KOBJ_SUFFIX)'
fi
if [ "$kextTarget" = y ]
then
	kext="${project}"'$(KEXT_SUFFIX)'
fi
formatVariable LIB_TARGETS_ARLIB.tmp 'LIB_TARGETS_ARLIB	=' "$arlib"
formatVariable SHLIB_VERSION.tmp 'SHLIB_VERSION		=' "$shlib_version"
formatVariable CMD_TARGETS_SHLIB.tmp 'CMD_TARGETS_SHLIB	=' "$shlib"
formatVariable CMD_TARGETS_DRIVER.tmp 'CMD_TARGETS_DRIVER	=' "$driver"
formatVariable CMD_TARGETS_KEXT.tmp 'CMD_TARGETS_KEXT	=' "$kext"

if [ "$exeTarget" = y ]
then
	executable="${project}"'$(EXE_SUFFIX)'
else
	executable='# '"${project}"'$(EXE_SUFFIX)'
fi
formatVariable EXECUTABLE.tmp 'EXECUTABLE		=' "\$(BUILDDIR)/$executable"

formatVariable DS_SUBPROJECTS.tmp 'DS_SUBPROJECTS	=' "$ds_subprojects"
formatVariable LOCALDEPLIBS.tmp 'LOCALDEPLIBS =' "$localdeplibs"
formatOptionalVariable CLOCAL.tmp 'CLOCAL =' "$clocal"
formatOptionalVariable CCLOCAL.tmp 'CCLOCAL =' "$cclocal"
formatOptionalVariable LOCAL_INCLUDE_DIRS.tmp 'LOCAL_INCLUDE_DIRS =' "$local_include_dirs"
formatVariable LIBFILES.tmp 'LIBFILES =' "$libfiles"
if [ "$module_dir" != "" ]
then
	if [ "$cdir" != "" ]
	then
		cdir_def="\n\nCOMMON_SRCDIR = \$(MOD_DIR)/$cdir"
	else
		cdir_def=""
	fi
	formatRule rules.tmp "include \$(TL_DIR)/$module_dir/Makerules.module$cdir_def"
else
	formatRule rules.tmp "include \$(TL_DIR)/\$(PROJ_FILE_DIR)/Makerules.project"
fi
if [ "$driverTarget" = y ]
then
	formatOptionalVariable COPT.tmp 'COPT =' "# set by CKERNEL for drivers"
	formatOptionalVariable CCOPT.tmp 'CCOPT =' "# set by CKERNEL for drivers"
else
	formatOptionalVariable COPT.tmp 'COPT =' "$copt"
	formatOptionalVariable CCOPT.tmp 'COPT =' "$ccopt"
fi

if [ "$projectDir" = y ]
then
	# building a project level makefile
	buildProjectMakefile
elif [ "$mflag" = y ]
then
	# building a lower level module makefile
	formatRule MOD_DIR.tmp "MOD_DIR=\$(TL_DIR)/$module_dir"
	buildModuleMakefile
else
	# building a lower level makefile
	buildBasicMakefile
fi