read logentries

read-logentries

#!/usr/bin/env php
<?php

if (empty($argv[1])) {
    fwrite(STDERR, 'Usage: read-logentries /path/to/your.log.gz'.PHP_EOL);
    exit(1);
}

$file = $argv[1];

if (!file_exists($file)) {
    fwrite(STDERR, 'File does not exist.'.PHP_EOL);
    exit(1);
}

if (!is_readable($file)) {
    fwrite(STDERR, 'File is not readable.'.PHP_EOL);
    exit(1);
}

$function = preg_match('/\.gz$/', $file) ? 'gzopen' : 'fopen';

try {
    $handle = call_user_func($function, $file, 'r');
} catch (Throwable $e) {
    fwrite(STDERR, $e->getMessage());
    exit(1);
}

$grep = $argv[2] ?? null;

while (($buffer = fgets($handle)) !== false) {
    try {
        $data = json_decode($buffer);
    } catch (Throwable $e) {
        fwrite(STDERR, json_last_error_msg());
        exit(1);
    }

    if (isset($data->line) && (!$grep || preg_match('/'.preg_quote($grep).'/', $data->name))) {
        fwrite(STDOUT, $data->line.PHP_EOL);
    }
}

fclose($handle);