github-handler

<?php
$git_path=/var/git
$deploy_exec=deploy.sh

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    
    $headersList = getallheaders();
    if ( ! array_key_exists("X-Hub-Signature", $headersList) || $headersList["X-Hub-Signature"] != "sha1=$(GET_FROM_GITHUB}") {
        header("HTTP1/1 400 Bad Request");
        return;
    } else {
        error_log("X-Hub-Signature verified, proceeding");
    }

    $request_body = file_get_contents('php://input');
    $data = json_decode($request_body, true);

    if ($data != NULL) {
        error_log("JSON:");
        if (is_array($data)) {
            if (array_key_exists("repository", $data) && "array" === gettype($data["repository"])) {
                $repo = $data["repository"];
                if (array_key_exists("full_name", $repo) && $repo["full_name"] === "byako/veikkaus") {
                    error_log("repository is Veikkaus");
                    if (array_key_exists("ref", $data) && $data["ref"] === "refs/heads/master" ) {
                        error_log("pushed : " . $data["after"]);
                        $exec_file = $git_path . $repo["name"] . $deploy_exec;
                        if (file_exists($exec_file)) {
                            if (is_executable($exec_file)) {
                                $rc = exec($exec_file);
                                if ($rc == "0") {
                                    // do nothing, RC 200 is automatic
                                    return;
                                } 
                            }
                        }
                        header("HTTP1/1 500 Internal Server Error");
                    } else {
                        error_log("push is not to master");
                    }
                } else { // unsupported repository
                    error_log("repository is not Veikkaus");
                }
            } else {
                error_log("repository is not specified");
            }
        } else {
            error_log("not an array: " . gettype($data));
        }
    }

} else {
    error_log("Not a post");
}

?>