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|
#!/bin/sh
###########################################################################
#
# Window Maker window manager
#
# Copyright (c) 2015 Christophe CURIS
# Copyright (c) 2015 Window Maker Team
#
# 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 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
###########################################################################
#
# replace-ac-keywords.sh:
# generate text file from a template text file, processing @keywords@
# from configure's detected stuff
#
# This follows the principle similar to what Autoconf does for the files
# defined in AC_CONFIG_FILES; the reasons for this script are:
#
# - Autoconf recommends to only defined Makefiles in that macro and to
# process the rest (if possible) through a Make rule;
#
# - we also take the opportunity to get access to the AC_DEFINE stuff
# without needing to AC_SUBST them, which would grow unnecessarily the
# makefile;
#
# - contrary to Autoconf, we also give the possibility to completely
# remove lines from the template, where Autoconf only comments them (when
# using AM_CONDITIONAL for example)
#
###########################################################################
#
# Please note that this script is writen in sh+sed on purpose: this script
# is gonna be run on the machine of the person who is trying to compile
# WindowMaker, and as such we cannot be sure to find any scripting language
# in a known version and that works (python/ruby/tcl/perl/php/you-name-it).
#
# So for portability, we stick to the same sh+awk constraint as Autotools
# to limit the problem, see for example:
# http://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.69/html_node/Portable-Shell.html
#
###########################################################################
# Report an error on stderr and exit with status 2 to tell make that we could
# not do what we were asked
arg_error() {
echo "$0: $@" >&2
exit 2
}
# print help and exit with success status
print_help() {
echo "$0: convert a Texinfo file into a plain text file"
echo "Usage: $0 [options...] <template-file>"
echo "valid options are:"
echo " -Dkey=value : define 'key' to the value 'value'"
echo " --filter key : remove lines containing @key@ if it is undefined"
echo " --header file : C header file to parse for #define"
echo " -o file : name for the output file"
echo " --replace key : replace @key@ with its value"
exit 0
}
# Parse a C header file and add the defined lines to the list of known keys+values
# We explicitely excludes macros defined on multiple lines and macros with arguments
# Skip value defined to '0' to consider them as undefine
extract_vars_from_c_header ()
{
sed -n '/^#[ \t]*define[ \t][ \t]*[A-Za-z][A-Za-z_0-9]*[ \t].*[^\\]$/ {
s/^#[ \t]*define[ \t]*//
s/[ \t][ \t]*/=/
/=0$/d
p
}' "$1"
}
# Extract command line arguments
while [ $# -gt 0 ]; do
case $1 in
-D*)
echo "$1" | grep '^-D[a-zA-Z][a-z_A-Z0-9]*=' > /dev/null || arg_error "syntax error for '$1', expected -Dname=value"
var_defs="$var_defs
`echo "$1" | sed -e 's/^-D//' `"
;;
--filter)
shift
list_filters="$list_filters $1"
;;
--header)
shift
[ -r "$1" ] || arg_error "header file \"$1\" is not readable"
var_defs="$var_defs
`extract_vars_from_c_header "$1" `"
;;
-h|-help|--help) print_help ;;
-o)
shift
output_file="$1"
;;
--replace)
shift
list_replaces="$list_replaces $1"
;;
-*) arg_error "unknow option '$1'" ;;
*)
[ "x$input_file" = "x" ] || arg_error "only 1 input file can be specified, not \"$input_file\" and \"$1\""
input_file="$1"
;;
esac
shift
done
# Check consistency of command-line
[ "x$input_file" != "x" ] || arg_error "no input template file given"
[ "x$output_file" != "x" ] || arg_error "no output file given"
[ "x$list_replaces$list_filters" != "x" ] || arg_error "no key to process from template"
###########################################################################
# Generate the SED commands to replace the requested keys
for key in $list_replaces
do
# if there are multiple possible values, keep the last
value=`echo "$var_defs" | grep "^$key=" | tail -1 `
[ "x$value" != "x" ] || arg_error "key \"$key\" does not have a value"
sed_cmd="$sed_cmd
s#@$key@#`echo "$value" | sed -e 's/^[^=]*=//' `#"
done
# Generate the SED commands to filter lines with the specified keys
for key in $list_filters
do
if echo "$var_defs" | grep "^$key=" > /dev/null ; then
sed_cmd="$sed_cmd
s#@$key@##
/@!$key@/d"
else
sed_cmd="$sed_cmd
s#@!$key@##
/@$key@/d"
fi
done
###########################################################################
sed -e "$sed_cmd" < "$input_file" > "$output_file"
|
