# Copyright 2006-2007 Rene Rivera
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)

build-project downloads ;
build-project history ;
build-project news ;

import feature ;
import property ;
import path ;
import set ;

feature.feature title : : free ;
feature.feature uri : : free ;
feature.feature count : : free ;
feature.feature cwd : : free ;

rule get ( property : properties * )
{
    local r = [ property.select $(property) : $(properties) ] ;
    return $(r:G=) ;
}

rule rss ( targets * : sources * : properties * )
{
    TITLE on $(targets)
        = [ get <title> : $(properties) ] ;
    LINK on $(targets)
        = [ get <uri> : $(properties) ] ;
    COUNT on $(targets)
        = [ get <count> : $(properties) ] ;
    BB2RSS on $(targets)
        = [ path.native [ path.join [ get <cwd> : $(properties) ] bbook2rss.py ] ] ;
    JAMSHELL on $(targets)
        = % ;
    PYTHON on $(targets)
        = [ property.select <python.interpreter> : $(properties) ] ;
}

actions rss
{
    "$(PYTHON:G=:E=python)" "$(BB2RSS)" "--channel-title=$(TITLE)" "--channel-link=$(LINK)" "--count=$(COUNT)" "--output=$(<)" "$(>)"
}

rule glob-rss ( p + )
{
    local files = [ glob $(p:S=.qbk) ] ;
    files = $(files:S=.xml) ;
    local result ;
    for local f in $(files)
    {
        local d = $(f:D) ;
        result += $(d:B)//$(f:D=) ;
    }
    return $(result) ;
}

path-constant CWD : . ;

make downloads.rss : [ glob-rss history/boost_1_42_0 downloads/* ]
    : @rss :
    <title>"Boost Downloads"
    <uri>"http://www.boost.org/feed/download.rss"
    <count>5
    <location>$(CWD)
    <cwd>$(CWD)
    ;

make history.rss : [ glob-rss history/* ]
    : @rss :
    <title>"Boost History"
    <uri>"http://www.boost.org/feed/history.rss"
    <location>$(CWD)
    <cwd>$(CWD)
    ;

make news.rss
    : [ set.difference
        [ glob-rss news/* history/* ] :
            ## Uncomment the following line out to hide the item from the result.
            #~ [ glob-rss history/boost_1_40_0 ]
        ]
    : @rss :
    <title>"Boost News"
    <uri>"http://www.boost.org/feed/news.rss"
    <count>5
    <location>$(CWD)
    <cwd>$(CWD)
    ;