#!/bin/bash

# description format shameless stolen from Andrew Morton's patch scripts
# some code stolen too, variables renamed to unprotect the guilty

# the rest, copyright (c) Ray Lee, 2003
# GPL'd, use as you wish

# expects a tree of patches and descriptions, and recurses until covered

# Example:
# .
# |-- index.footer
# |-- index.header
# |-- linux_kernel
# |   |-- fishcamp
# |   |-- fishcamp.dir_desc
# |   |-- vaio
# |   |   |-- apm-power-status-workaround-1.desc
# |   |   |-- apm-power-status-workaround-1.diff
# |   |   |-- apm-power-status-workaround-2.desc
# |   |   `-- apm-power-status-workaround-2.diff
# |   `-- vaio.dir_desc
# |-- linux_kernel.dir_desc
# |-- obsolete
# |   |-- gnomepim.desc
# |   |-- gnomepim.diff
# |   |-- waste.desc
# |   `-- waste.diff
# `-- obsolete.dir_desc

# for each directory to recurse into, have a $DIR.dir_desc file
# for each diff to describe, have a $DIFF.desc file

# the format of the file is:
# 	DESC
# 	one line of pithy description
# 	EDESC
#	
#	Longer, multiline description will
#	go here.

description_summary() {
        local state=0
        while read x
        do
                if [ x"$x" = xDESC ]
                then
                        state=1
                elif [ x"$x" = xEDESC ]
                then
                        state=0
                elif [ $state = 1 ]
                then
                        echo -n "$x "
                fi
        done
}

description_body() {
        local file=$1
 
        local found_description=0
        while read x
        do
                if [ x"$x" = xEDESC ]
                then
                        cat
                        found_description=1
                fi
        done < $file

        if [ $found_description = 0 ]
        then
                cat $file
        fi
}

rootname() {
        local ret=$(basename $1)
        ret=$(echo $ret | sed -e 's/\.patch$//')
        ret=$(echo $ret | sed -e 's/\.diff$//')
        ret=$(echo $ret | sed -e 's/\.pc$//')
        ret=$(echo $ret | sed -e 's/\.txt$//')
        ret=$(echo $ret | sed -e 's/\.desc$//')
        ret=$(echo $ret | sed -e 's/\.dir_desc$//')
        echo $ret
}

describe_directory() {
	local printed_something=0
	local subdirs=$(ls 2>/dev/null $1/*.dir_desc | wc -l)
	if [ $subdirs != 0 ]
	then
		for directory_description in $1/*.dir_desc
		do
			DIR=$(rootname $directory_description)
			echo -n "<h3>"
			description_summary < $directory_description
			echo "</h3><ul>"
			description_body $directory_description
			describe_directory $1/$DIR
	
			echo "</ul>"
			printed_something=1
		done
	fi
	
	local files=$(ls 2>/dev/null $1/*.desc | wc -l)
	if [ $files != 0 ]
	then
		for patch_description in $1/*.desc
		do
			PATCH=$(rootname $patch_description).diff
			echo -n "<h4><a href=\""
			echo -n $1/$PATCH
			echo -n "\">"
			description_summary < $patch_description
			echo "</a></h4><ul>"
			description_body $patch_description
			echo "</ul>"
			echo
			printed_something=1
		done
	fi

	if [ $printed_something = 0 ]
	then
		echo "<h4><i>Currently no patches</i></h4>"
	fi
}

cat index.header
describe_directory "."
dt=$(date +"%l:%M%P, %e %B %Y")
cat index.footer | sed "s/@datetime/$dt/"