Subversion Repositories SvarDOS

<?php /*

  SvarDOS repo index builder

  Copyright (C) Mateusz Viste 2012-2022

  buildidx computes an index tsv file for the SvarDOS repository.

  it must be executed pointing to a directory that stores packages (*.svp)

  files. buildidx will generate the index file and save it into the package

  repository.

  requires php-zip

  16 feb 2022: added warning about overlong version strings

  15 feb 2022: index is generated as json, contains all filenames and alt versions

  14 feb 2022: packages are expected to have the *.svp extension

  12 feb 2022: skip source packages from being processed (*.src.zip)

  20 jan 2022: rewritten the code from ANSI C to PHP for easier maintenance

  13 feb 2021: 'title' LSM field is no longer looked after

  11 feb 2021: lsm headers are no longer checked, so it is compatible with the simpler lsm format used by SvarDOS

  13 jan 2021: removed the identification line, changed CRC32 to bsum, not creating the listing.txt file and stopped compressing index

  23 apr 2017: uncompressed index is no longer created, added CRC32 of zib (bin only) files, if present

  28 aug 2016: listing.txt is always written inside the repo dir (instead of inside current dir)

  27 aug 2016: accepting full paths to repos (starting with /...)

  07 dec 2013: rewritten buildidx in ANSI C89

  19 aug 2013: add a compressed version of the index file to repos (index.gz)

  22 jul 2013: creating a listing.txt file with list of packages

  18 jul 2013: writing the number of packaged into the first line of the lst file

  11 jul 2013: added a switch to 7za to make it case insensitive when extracting lsm files

  10 jul 2013: changed unzip calls to 7za (to handle cases when appinfo is compressed with lzma)

  04 feb 2013: added CRC32 support

  22 sep 2012: forked 1st version from FDUPDATE builder

*/

$PVER = "20220216";

// computes the BSD sum of a file and returns it

function file2bsum($fname) {

  $result = 0;

  $fd = fopen($fname, 'rb');

  if ($fd === false) return(0);

  while (!feof($fd)) {

    $buff = fread($fd, 1024 * 1024);

    $slen = strlen($buff);

    for ($i = 0; $i < $slen; $i++) {

      // rotr

      $result = ($result >> 1) | ($result << 15);

      // add and truncate to 16 bits

      $result += ord($buff[$i]);

      $result &= 0xffff;

    }

  }

  fclose($fd);

  return($result);

}

// reads file fil from zip archive z and returns its content, or false on error

function read_file_from_zip($z, $fil) {

  $zip = new ZipArchive;

  if ($zip->open($z, ZipArchive::RDONLY) !== true) {

    echo "ERROR: failed to open zip file '{$z}'\n";

    return(false);

  }

  // load the appinfo/pkgname.lsm file

  $res = $zip->getFromName($fil, 8192, ZipArchive::FL_NOCASE);

  $zip->close();

  return($res);

}

// reads a LSM string and returns it in the form of an array

function parse_lsm($s) {

  $res = array();

  for ($l = strtok($s, "\n"); $l !== false; $l = strtok("\n")) {

    // the line is "token: value", let's find the colon

    $colpos = strpos($l, ':');

    if (($colpos === false) || ($colpos === 0)) continue;

    $tok = strtolower(trim(substr($l, 0, $colpos)));

    $val = trim(substr($l, $colpos + 1));

    $res[$tok] = $val;

  }

  return($res);

}

// ***************** MAIN ROUTINE *********************************************

//echo "SvarDOS repository index generator ver {$PVER}\n";

if (($_SERVER['argc'] != 2) || ($_SERVER['argv'][1][0] == '-')) {

  echo "usage: php buildidx.php repodir\n";

  exit(1);

}

$repodir = $_SERVER['argv'][1];

$pkgfiles = scandir($repodir);

$pkgcount = 0;

// do a list of all svp packages with their available versions and descriptions

$pkgdb = array();

foreach ($pkgfiles as $fname) {

  if (!preg_match('/.svp$/i', $fname)) continue; // skip non-svp files

  $path_parts = pathinfo($fname);

  $pkgnam = explode('-', $path_parts['filename'])[0];

  $pkgfullpath = realpath($repodir . '/' . $fname);

  $lsm = read_file_from_zip($pkgfullpath, "appinfo/{$pkgnam}.lsm");

  if ($lsm == false) {

    echo "ERROR: pkg {$fname} does not contain an LSM file at the expected location\n";

    continue;

  }

  $lsmarray = parse_lsm($lsm);

  if (empty($lsmarray['version'])) {

    echo "ERROR: lsm file in {$fname} does not contain a version\n";

    continue;

  }

  if (strlen($lsmarray['version']) > 16) {

    echo "WARNING: version string in lsm file of {$fname} is too long (16 chars max)\n";

    continue;

  }

  if (empty($lsmarray['description'])) {

    echo "ERROR: lsm file in {$fname} does not contain a description\n";

    continue;

  }

  $meta['fname'] = $fname;

  $meta['desc'] = $lsmarray['description'];

  $pkgdb[$pkgnam][$lsmarray['version']] = $meta;

}

$db = array();

// iterate over each svp package

foreach ($pkgdb as $pkg => $versions) {

  // sort filenames by version, highest first

  uksort($versions, "version_compare");

  $versions = array_reverse($versions, true);

  foreach ($versions as $ver => $meta) {

    $fname = $meta['fname'];

    $desc = $meta['desc'];

    $bsum = file2bsum(realpath($repodir . '/' . $fname));

    $meta2['ver'] = strval($ver);

    $meta2['bsum'] = $bsum;

    if (empty($db[$pkg]['desc'])) $db[$pkg]['desc'] = $desc;

    $db[$pkg]['versions'][$fname] = $meta2;

  }

  $pkgcount++;

}

if ($pkgcount < 100) echo "WARNING: an unexpectedly low number of packages has been found in the repo ({$pkgcount})\n";

file_put_contents($repodir . '/_index.json', json_encode($db));

exit(0);

?>