#!/bin/sh
# Analyse Documentation/Configure.help
# Adopted from a script by Paul Gortmaker 01/2001.
# Modified greatly by Steven Cole 03/2001.
#
# Please note that config options written to ach_orphans may well
# be harbingers of coming attractions, having been added to Configure.help
# prior to inclusion in a [cC]onfig.in file.
# That is why this script does not remove those entries,
# as did Paul's, on which this script is based.
# Many, however are just old cruft.
#
# Run this from the top of your tree.
# The ach script will make files prefixed with ach_ for easy deletion.

if [ ! -r Documentation/Configure.help ]; then
	echo Cant read or find Documentation/Configure.help
	exit
fi

FILES=`find . -name [cC]onfig.in`

grep '^CONFIG_[0-9A-Za-z_]' Documentation/Configure.help|\
	sort|uniq>ach_unique_help

grep '^CONFIG_[0-9A-Za-z_]' Documentation/Configure.help|\
	sort>ach_all_help

# Tab and space inside [  ]
cat $FILES|grep -v "^[ 	]*#"| \
	sed 's/.*[ 	]\(CONFIG_[A-Za-z0-9_]\+\)[ 	]*.*$/\1/;t;d'|\
	sort|uniq>ach_all_options

cat $FILES|grep -v define_|grep -v "^#"| \
	sed 's/.*[ 	]\(CONFIG_[A-Za-z0-9_]\+\)[ 	]*.*$/\1/;t;d'|\
	sort|uniq>ach_setable_options

diff -u ach_setable_options ach_unique_help|\
	grep '^\+CONFIG_'|sed 's/^\+//'>ach_orphans

diff -u ach_unique_help ach_setable_options|grep '^\+'|grep CONFIG|sed 's/+//'>ach_no_help

diff -u ach_setable_options ach_all_options|grep +CONFIG|sed 's/+//'>ach_derived_options

diff -u ach_unique_help ach_all_help|grep +CONFIG|sed 's/+//'|uniq>ach_dup_options

echo -ne 'Number of config options (total)                    : '
cat ach_all_options | wc -l

echo -ne 'Number of config options (setable)                  : '
cat ach_setable_options | wc -l

echo -ne 'Number of config options (derived)                  : '
cat ach_derived_options | wc -l

echo -ne 'Number of config options with help text (total)     : '
cat ach_all_help | wc -l

echo -ne 'Number of config options with help text (unique)    : '
cat ach_unique_help | wc -l

echo -ne 'Number of config options with duplicated help text  : '
cat ach_dup_options | wc -l

echo -ne 'Number of config options without any help text      : '
cat ach_no_help | wc -l

echo -ne 'Number of help entries without valid config options : '
cat ach_orphans | wc -l