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#!/usr/bin/php
<?php

$ignorechangelog = false;
$remi = false;
$fedo = false;
// Parsing arg
for ($i=1 ; $i < $_SERVER['argc'] ; $i++) {
	switch ($arg=$_SERVER['argv'][$i]) {
		case '-n': 
			$ignorechangelog = true;
			break;
		default:
			if ($arg[0] == '-') {
				die("Unkown option $arg\n");
			} else if ($fedo) {
				die("Too much arguments\n");
			} else if ($remi) {
				$fedo = $arg;
			} else {
				$remi = $arg;
			}
	}
}

if (!$remi) {
   die("
Usage  getspec [ -n ] <remispec>  [ <fedoraspec> ]

Otions:
    -n : no new changelog entry
\n");
}
if (!$fedo) {
    $fedo = basename($remi);
}
if (!file_exists($fedo) && strpos($fedo, '-dev')) {
	$fedo = str_replace('-dev', '', $fedo);
}

printf("Reading remi's spec: %s\n", $remi);
$rem = file_get_contents($remi);
if (!$rem) {
    die("Cannot read $remi\n");
}
$rem = explode("\n", $rem);

printf("Reading fedora's spec: %s\n", $fedo);
$fed = file_get_contents($fedo);
if (!$fed) {
    die("Cannot read $fedo\n");
}
$fed = explode("\n", $fed);

printf("Merging\n");

$out = [];
$inchangelog = false;
$empty = 0;
$skip = 0;
foreach ($rem as $l) {
    if ($l == '%changelog') {
        $inchangelog = true;
    }
    if (preg_match('/^BuildRoot:/', $l) ||
        preg_match('/^rm -rf( )*%{buildroot}$/', $l) ||
        preg_match('/^%defattr/', $l) ||
        preg_match('/^# remirepo spec/', $l) ||
        preg_match('/%clean/', $l)) {
        continue;
    }
	if (preg_match("/# remirepo:([0-9]+)/", $l, $reg)) {
		$skip = $reg[1];
		continue;
	}
	if ($skip) {
		$skip--;
		continue;
	}
    if ($l) {
        $out[] = $l;
        $empty = 0;
    } else {
        if ($empty < 2) {
            $out[] = $l;
        }
        $empty++;
    }
    
    if ($inchangelog) {
		if ($ignorechangelog) {
		    // After entering changelog
	        break;
		}
		if (!$l) { 
		    // After 1st new Changelog entry
	        break;
		}
    }
}

$inchangelog = false;
foreach ($fed as $l) {
    if ($l == '%changelog') {
        $inchangelog = true;
        continue;
    }    
    if ($inchangelog) {
        $out[] = $l;
    }
}

printf("Saving $fedo\n");
file_put_contents($fedo, implode("\n", $out));