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# <?php
if (!$error) {
# process PKGBUILD - remove line concatenation
#
$pkgbuild = array();
$line_no = 0;
$lines = array();
$continuation_line = 0;
$current_line = "";
$paren_depth = 0;
foreach (explode("\n", $pkgbuild_raw) as $line) {
$line = trim($line);
# Remove comments
$line = preg_replace('/\s*#.*/', '', $line);
$char_counts = count_chars($line, 0);
$paren_depth += $char_counts[ord('(')] - $char_counts[ord(')')];
if (substr($line, strlen($line)-1) == "\\") {
# continue appending onto existing line_no
#
$current_line .= substr($line, 0, strlen($line)-1);
$continuation_line = 1;
} elseif ($paren_depth > 0) {
# assumed continuation
# continue appending onto existing line_no
#
$current_line .= $line . " ";
$continuation_line = 1;
} else {
# maybe the last line in a continuation, or a standalone line?
#
if ($continuation_line) {
# append onto existing line_no
#
$current_line .= $line;
$lines[$line_no] = $current_line;
$current_line = "";
} else {
# it's own line_no
#
$lines[$line_no] = $line;
}
$continuation_line = 0;
$line_no++;
}
}
# Now process the lines and put any var=val lines into the
# 'pkgbuild' array.
while (list($k, $line) = each($lines)) {
# Neutralize parameter substitution
$line = preg_replace('/\${(\w+)#(\w*)}?/', '$1$2', $line);
$lparts = Array();
# Match variable assignment only.
if (preg_match('/^\s*[_\w]+=[^=].*/', $line, $matches)) {
$lparts = explode("=", $matches[0], 2);
}
if (!empty($lparts)) {
# this is a variable/value pair, strip
# out array parens and any quoting,
# except in pkgdesc for pkgname or
# pkgdesc, only remove start/end pairs
# of " or '
if ($lparts[0] == "pkgname" || $lparts[0] == "pkgdesc") {
if ($lparts[1]{0} == '"' &&
$lparts[1]{strlen($lparts[1])-1} == '"') {
$pkgbuild[$lparts[0]] = substr($lparts[1], 1, -1);
}
elseif
($lparts[1]{0} == "'" &&
$lparts[1]{strlen($lparts[1])-1} == "'") {
$pkgbuild[$lparts[0]] = substr($lparts[1], 1, -1);
} else {
$pkgbuild[$lparts[0]] = $lparts[1];
}
} else {
$pkgbuild[$lparts[0]] = str_replace(array("(",")","\"","'"), "",
$lparts[1]);
}
}
}
# some error checking on PKGBUILD contents - just make sure each
# variable has a value. This does not do any validity checking
# on the values, or attempts to fix line continuation/wrapping.
$req_vars = array("url", "pkgdesc", "license", "pkgrel", "pkgver", "arch", "pkgname");
foreach ($req_vars as $var) {
if (!array_key_exists($var, $pkgbuild)) {
$error = __('Missing %s variable in PKGBUILD.', $var);
break;
}
}
}
# Now, run through the pkgbuild array, and do "eval" and simple substituions.
$new_pkgbuild = array();
if (!$error) {
while (list($k, $v) = each($pkgbuild)) {
if (strpos($k,'eval ') !== false) {
$k = preg_replace('/^eval[\s]*/', "", $k);
##"eval" replacements
$pattern_eval = '/{\$({?)([\w]+)(}?)}/';
while (preg_match($pattern_eval,$v,$regs)) {
$pieces = explode(",",$pkgbuild["$regs[2]"]);
## nongreedy matching! - preserving the order of "eval"
$pattern = '/([\S]*?){\$'.$regs[1].$regs[2].$regs[3].'}([\S]*)/';
while (preg_match($pattern,$v,$regs_replace)) {
$replacement = "";
for ($i = 0; $i < sizeof($pieces); $i++) {
$replacement .= $regs_replace[1].$pieces[$i].$regs_replace[2]." ";
}
$v=preg_replace($pattern, $replacement, $v, 1);
}
}
}
# Simple variable replacement
$pattern_var = '/\$({?)([_\w]+)(}?)/';
$offset = 0;
while (preg_match($pattern_var, $v, $regs, PREG_OFFSET_CAPTURE, $offset)) {
$var = $regs[2][0];
$pos = $regs[0][1];
$len = strlen($regs[0][0]);
if (isset($new_pkgbuild[$var])) {
$replacement = substr($new_pkgbuild[$var], strpos($new_pkgbuild[$var], " "));
}
else {
$replacement = '';
}
$v = substr_replace($v, $replacement, $pos, $len);
$offset = $pos + strlen($replacement);
}
$new_pkgbuild[$k] = $v;
}
}
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