#!/usr/bin/php -qCddisable_functions=mysql_query
<?php
/**
 * api: cli
 * type: application
 * title: apt-phparchive
 * description: generates Packages.* and Release.* indexes for _trivial_ APT repository
 * version: 0.7
 * author: mario <mario#include-once:org>
 * category: utility
 * config:
 *    { name: KEYNAME, value: dpkg1, title: "GPG key identifier", description: "used as GPG key for signing the Packages.gpg file" }
 * status: stable
 *
 *
 * Traverses directories for common package files.
 * Should index .deb .php .zip .exe .msi and possibly .rpm all at once.
 *

 * It's best invoked as:
 *
 *     apt-phparchive generate .
 *
 * That creates "Packages" and "Packages.xz" and "Release", "Release.gpg"
 * and "InRelease" entries. Requires installed Unix tools and GPG for signing.
 *
 * Arguments are only loosely modelled after "apt-ftparchive".
 *
 * Package types:
 * - DEB archives are inspected with ar|gzip|tar
 * - PHP plugins are searched for a comment block with key:value meta infos
     according to http://milki.include-once.org/genericplugins/

 * - RPM converison tested with 4.8, might fail if the output prettyprinting
 *   got changed in other versions.
 * - The PHP plugin meta data "standard" isn't really one. Its current
 *   usage is still in flux. Wordpress plugin files are pre-converted by the
 *   generic_pmd handler.
 * - No idea how APT-RPM would actually require the Packages index. The
 *   current rewriting into standard APT fields: might possibly break it.
 * - There's a apt_preferences penalty for fully populated "InRelease"
 *   indexes. Setting any of Label, Suite, Version fields raises an
 *   overwrite warning from apt. All badly documented.
 *
 */

#-- init
if (!function_exists("str_getcsv")) { function str_getcsv($str) { return array_map("trim", explode(",", $str)); } }
include("pluginmetadata.php");

    #-- compress "Packages"
    function Packages_bz2() {
        global $dir;
        out( 
            `bzip2 -kf $dir/Packages`
        );
    }
    function Packages_xz() {
        global $dir;
        out( 
            `xz -kf $dir/Packages`
        );
    }


    #-- create "Release" file
    function Release() {
        out(join("\n", array(
#            "Origin: Ubuntu", 
#            "Label: $GLOBALS[KEYNAME]",
#            "Suite: artful",
#            "Version: 17.10",
            "Date: " . gmdate(DATE_RFC822) . "",
#            "Codename: artful\n",
            "Architectures: amd64 i386 all",
            "Components: universe multiverse",
            "Description: $GLOBALS[KEYNAME]",
            "NotAutomatic: no",
            "ButAutomaticUpgrades: yes",
        )) . "\n");

        // iterate over checksum types and index files
        foreach (array("MD5Sum"=>"md5", "SHA1"=>"sha1", "SHA256"=>"sha256", "RIPE160"=>"ripemd160") as $hashname=>$hash) {
            out(
                "$hashname:\n"
            );
            foreach ((glob("Packages*")+glob("Release*")) as $fn) {

                // Not sure if we have to, but "Release" file gets ignored
                if ($fn == "Release") {
                    $filesize = 0;
                    $chksum = hash($hash, "");
                }
                else {

                    " ", $fn, "\n"
                );
            }
        }
        out("\n");
    }

    #-- inline-signed Release file
    #   https://wiki.debian.org/DebianRepository/Format
    function InRelease() {
        global $dir, $KEYNAME;
        out(`gpg --yes -s --clearsign --digest-algo SHA512 -u $KEYNAME -o /dev/stdout $dir/Release`);
    }



    #-- sign "Release.gpg"
    function Release_gpg() {
        global $dir, $KEYNAME;
        out( 
            `gpg --yes -abs --digest-algo SHA512 -u $KEYNAME -o $dir/Release.gpg $dir/Release`
        );
    }



    #-- perform all index generation things at once
    function Generate() {
        global $dir, $argv0, $args;
        out(`$argv0 Packages $dir --cache {$args->cache} > $dir/Packages`);
#       out(`$argv0 Packages.bz2 $dir`);
        out(`$argv0 Packages.xz $dir`);
        out(`$argv0 Release $dir > $dir/Release`);
        out(`$argv0 Release.gpg $dir`);
        out(`$argv0 InRelease $dir > $dir/InRelease`);
    }


}//main