Phase 1 sub-commit 8: retire the Phase 0 spike
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The framework skeleton at framework/skeleton/ now exercises every transport channel the spike proved (HTTP /api/ping, Mercure publish, SSE subscribe, FrankenPHP child management, single-instance lock, clean shutdown) — but through the proper PhpQml.Bridge module rather than ad-hoc inline QML. Lessons from the spike are preserved in PLAN.md and in the framework code's comments where they apply. Closes Phase 1. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
2
spike/.gitignore
vendored
2
spike/.gitignore
vendored
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bin/
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build/
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{
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auto_https off
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admin off
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frankenphp
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order php_server before respond
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order mercure after encode
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}
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http://127.0.0.1:8765 {
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root * php/
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encode gzip
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mercure {
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transport local
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publisher_jwt !ChangeThisDevKey!
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subscriber_jwt !ChangeThisDevKey!
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anonymous
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publish_origins *
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cors_origins *
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}
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php_server
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log {
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output stderr
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format console
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}
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}
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@@ -1,88 +0,0 @@
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# Phase 0 — Throwaway transport spike
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The smallest thing that proves the php-qml architecture's transport works end-to-end on Linux.
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A Qt/QML host spawns a bundled FrankenPHP process, hits `GET /api/ping` over local HTTP, and subscribes to Mercure SSE. Clicking "Ping" makes a request whose handler also publishes a Mercure event — that event then arrives back in the QML window via the SSE stream.
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Lifetime of this directory is short: it gets removed when Phase 1's framework skeleton supersedes it. See [PLAN.md §13](../PLAN.md#13-roadmap-to-poc).
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## Run it
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Prerequisites on the dev machine:
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- Linux (tested on openSUSE Tumbleweed)
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- `cmake`, `qt6-base-devel`, `qt6-declarative-devel`, `qt6-quickcontrols2-devel`, `qt6-tools-devel`, `gcc-c++`
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- `curl` (for the FrankenPHP download)
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Fetch FrankenPHP if `bin/frankenphp` is missing:
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```bash
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curl -fsSL -o spike/bin/frankenphp \
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https://github.com/php/frankenphp/releases/download/v1.12.2/frankenphp-linux-x86_64
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chmod +x spike/bin/frankenphp
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```
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Then from the repo root:
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```bash
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./spike/run.sh
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```
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The script builds the Qt binary on first run (into `spike/build/`) and launches it. The Qt host spawns FrankenPHP as a child; closing the window cleans both up.
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## What you should see
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A window with two status dots — backend and Mercure — that flip green within a second of launch. Clicking **Ping** appends two lines to the event log: an outgoing `→ ping` line with the response payload and timing, and an incoming `← event …` line carrying the Mercure-pushed copy of the same payload. The two arrive within ~50 ms of each other on a quiet machine.
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Killing the child manually from another terminal — `pkill -f spike/bin/frankenphp` — flips the status dots and the QML logs `· mercure → disconnected`. Re-running `run.sh` reconnects.
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## What's hardcoded
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| Thing | Value |
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| --- | --- |
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| Backend URL | `http://127.0.0.1:8765` |
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| Mercure topic | `app://ping` |
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| Mercure JWT (publisher + subscriber) | `!ChangeThisDevKey!` (anonymous subscribers are also enabled) |
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| FrankenPHP version | `v1.12.2` (pinned in this README; `bin/frankenphp` is gitignored) |
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| Port | `8765` (chosen to avoid the system FrankenPHP that already binds 8080 on this box) |
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No auth on `/api/ping`. No `Last-Event-ID` resume. No optimistic updates. All of those land in Phase 1+.
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## Project layout
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```text
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spike/
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Caddyfile # FrankenPHP / Caddy / Mercure config
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run.sh # build + run
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bin/frankenphp # downloaded static binary (gitignored)
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php/
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index.php # GET /api/ping → JSON pong + Mercure publish
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qt/
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CMakeLists.txt
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main.cpp # Qt host: spawns frankenphp, installs SIGTERM handler, prctl(PR_SET_PDEATHSIG)
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Main.qml # window UI: status dots, Ping button, event log
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Mercure.qml # pure-QML SSE client over XMLHttpRequest
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```
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## Findings worth carrying into Phase 1
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- **The `mercure` Caddy directive is site-level, not global.** It goes inside the site block alongside `php_server`, not in the `{}` global block.
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- **The `transport` directive is now scalar, not URL.** `transport_url local://local` is deprecated in FrankenPHP 1.12; use `transport local`.
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- **A default Mercure config requires a transport.** Without one, FrankenPHP falls back to `bolt` and demands a database file, which fails with `invalid transport: timeout` on first boot. For dev / spikes, `transport local` (in-memory) is the right choice.
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- **Subprocess cleanup needs both belt and suspenders.** Qt's `aboutToQuit` only fires for graceful exits; for `SIGTERM` we need an explicit signal handler that calls `QCoreApplication::quit()`. As a Linux safety net, `prctl(PR_SET_PDEATHSIG, SIGTERM)` in the child via `QProcess::setChildProcessModifier()` ensures the kernel reaps the child even if the parent crashes.
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- **PHP 8.5 deprecates `curl_close()`.** It's been a no-op since 8.0; spike code now relies on the variable going out of scope. Worth scrubbing for in Phase 1's PHP code style rules.
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- **The system can have a pre-existing FrankenPHP on `:8080`.** Hardcoded port choice for the spike is `:8765`; for the framework proper, pick the port at runtime per session (§3, *Startup*) or use a unix socket on Linux/macOS.
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- **Pure-QML SSE works.** `XMLHttpRequest` in QML 6.11 does deliver partial responses during `readyState === LOADING`, so `Mercure.qml` parses the stream without a C++ helper. The C++ `MercureClient` planned in PLAN.md §7 is still the right call for Phase 1 (reconnect, `Last-Event-ID`, backpressure), but it's not blocked on a Qt limitation.
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- **JWT minting in plain PHP is ten lines.** Symfony's `mercure-bundle` is convenience, not necessity — useful to know for the Phase 1 SessionAuthenticator.
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## Out of scope for this spike
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(All deferred to Phase 1+, see [PLAN.md §13](../PLAN.md#13-roadmap-to-poc).)
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- Symfony, Doctrine, any framework
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- Per-session secret, real auth
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- `Last-Event-ID` resume / reconnect with backoff
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- Optimistic updates, `pending` role, `connectionState` enum
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- Single-instance lock, deep links
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- Packaging, auto-update, code signing
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- Tests (manual run only)
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@@ -1,64 +0,0 @@
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<?php
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declare(strict_types=1);
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const MERCURE_KEY = '!ChangeThisDevKey!';
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const MERCURE_HUB = 'http://127.0.0.1:8765/.well-known/mercure';
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const MERCURE_TOPIC = 'app://ping';
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$path = parse_url($_SERVER['REQUEST_URI'] ?? '/', PHP_URL_PATH);
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$method = $_SERVER['REQUEST_METHOD'] ?? 'GET';
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header('Access-Control-Allow-Origin: *');
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if ($path === '/api/ping' && $method === 'GET') {
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$payload = ['pong' => true, 'now' => date('c')];
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publishToMercure(MERCURE_TOPIC, $payload);
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header('Content-Type: application/json');
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echo json_encode($payload);
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return;
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}
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http_response_code(404);
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header('Content-Type: application/json');
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echo json_encode(['error' => 'not found', 'path' => $path]);
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function publishToMercure(string $topic, array $data): void
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{
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$body = http_build_query([
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'topic' => $topic,
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'data' => json_encode($data),
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]);
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$ch = curl_init(MERCURE_HUB);
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curl_setopt_array($ch, [
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CURLOPT_POST => true,
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CURLOPT_POSTFIELDS => $body,
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CURLOPT_HTTPHEADER => [
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'Content-Type: application/x-www-form-urlencoded',
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'Authorization: Bearer ' . mintPublisherJwt(),
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],
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_TIMEOUT => 5,
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]);
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$resp = curl_exec($ch);
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$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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error_log("mercure publish topic=$topic http=$code body=" . ($resp === false ? 'false' : (string) $resp));
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}
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function mintPublisherJwt(): string
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{
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$header = ['alg' => 'HS256', 'typ' => 'JWT'];
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$payload = ['mercure' => ['publish' => ['*']]];
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$h = b64url(json_encode($header));
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$p = b64url(json_encode($payload));
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$s = b64url(hash_hmac('sha256', "$h.$p", MERCURE_KEY, true));
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return "$h.$p.$s";
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}
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function b64url(string $bytes): string
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{
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return rtrim(strtr(base64_encode($bytes), '+/', '-_'), '=');
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}
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cmake_minimum_required(VERSION 3.21)
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project(php_qml_spike LANGUAGES CXX)
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set(CMAKE_CXX_STANDARD 20)
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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set(CMAKE_AUTOMOC ON)
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find_package(Qt6 6.5 REQUIRED COMPONENTS Core Gui Quick QuickControls2 Network Qml)
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qt_standard_project_setup(REQUIRES 6.5)
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qt_add_executable(spike main.cpp)
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qt_add_qml_module(spike
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URI Spike
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VERSION 1.0
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QML_FILES
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Main.qml
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Mercure.qml
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)
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target_link_libraries(spike PRIVATE
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Qt6::Core
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Qt6::Gui
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Qt6::Quick
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Qt6::QuickControls2
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Qt6::Network
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Qt6::Qml
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)
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import QtQuick
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import QtQuick.Controls
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import QtQuick.Layouts
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import QtQuick.Window
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ApplicationWindow {
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id: window
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width: 720
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height: 520
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visible: true
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title: "php-qml — Phase 0 spike"
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readonly property string baseUrl: "http://127.0.0.1:8765"
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readonly property string topic: "app://ping"
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property string status: "starting…"
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property string lastResponse: ""
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property string mercureState: "disconnected"
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Mercure {
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id: mercure
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url: window.baseUrl + "/.well-known/mercure?topic=" + encodeURIComponent(window.topic)
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onEventReceived: function(data, id) {
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log.append("← event " + id.split(":").pop() + " " + data)
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}
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onStateChanged: function(s) {
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window.mercureState = s
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log.append("· mercure → " + s)
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}
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}
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Timer {
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id: bootProbe
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interval: 250
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running: window.status !== "online"
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repeat: true
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onTriggered: {
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const xhr = new XMLHttpRequest()
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xhr.open("GET", window.baseUrl + "/api/ping")
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xhr.onreadystatechange = function() {
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if (xhr.readyState === XMLHttpRequest.DONE && xhr.status === 200) {
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if (window.status !== "online") {
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window.status = "online"
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log.append("· backend ready")
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mercure.connect()
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}
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}
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}
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xhr.send()
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}
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}
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ColumnLayout {
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anchors.fill: parent
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anchors.margins: 16
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spacing: 12
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RowLayout {
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spacing: 10
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Layout.fillWidth: true
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Rectangle {
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width: 12; height: 12; radius: 6
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color: window.status === "online" ? "#3ab36c" : "#d89614"
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}
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Label { text: "Backend: " + window.status }
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Item { width: 12 }
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||||||
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Rectangle {
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||||||
width: 12; height: 12; radius: 6
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color: window.mercureState === "connected" ? "#3ab36c" : "#666"
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}
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Label { text: "Mercure: " + window.mercureState }
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Item { Layout.fillWidth: true }
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Button {
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||||||
text: "Ping"
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||||||
enabled: window.status === "online"
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|
||||||
onClicked: {
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|
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const t0 = Date.now()
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||||||
const xhr = new XMLHttpRequest()
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|
||||||
xhr.open("GET", window.baseUrl + "/api/ping")
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|
||||||
xhr.onreadystatechange = function() {
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|
||||||
if (xhr.readyState === XMLHttpRequest.DONE) {
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|
||||||
const dt = Date.now() - t0
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|
||||||
if (xhr.status === 200) {
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||||||
window.lastResponse = xhr.responseText
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|
||||||
log.append("→ ping " + dt + "ms " + xhr.responseText)
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|
||||||
} else {
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|
||||||
log.append("× ping failed status=" + xhr.status)
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|
||||||
}
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|
||||||
}
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|
||||||
}
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|
||||||
xhr.send()
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|
||||||
}
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|
||||||
}
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|
||||||
}
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|
||||||
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|
||||||
Label {
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|
||||||
text: "Last response: " + (window.lastResponse || "—")
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|
||||||
color: "#888"
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|
||||||
font.pixelSize: 12
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|
||||||
Layout.fillWidth: true
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|
||||||
elide: Text.ElideRight
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|
||||||
}
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|
||||||
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|
||||||
Frame {
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|
||||||
Layout.fillWidth: true
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|
||||||
Layout.fillHeight: true
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|
||||||
padding: 0
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|
||||||
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|
||||||
ScrollView {
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|
||||||
anchors.fill: parent
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|
||||||
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|
||||||
TextArea {
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|
||||||
id: log
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|
||||||
readOnly: true
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|
||||||
wrapMode: TextArea.Wrap
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|
||||||
font.family: "monospace"
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|
||||||
font.pixelSize: 12
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|
||||||
placeholderText: "events will appear here…"
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|
||||||
}
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|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
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|
||||||
@@ -1,84 +0,0 @@
|
|||||||
import QtQuick
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|
||||||
|
|
||||||
// Tiny SSE client implemented in pure QML.
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|
||||||
// Caveat: relies on QML's XMLHttpRequest delivering partial responses
|
|
||||||
// during readyState === LOADING. If that proves unreliable, this gets
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|
||||||
// replaced by a C++ class in Phase 1 (per PLAN.md §7, MercureClient).
|
|
||||||
QtObject {
|
|
||||||
id: root
|
|
||||||
|
|
||||||
property string url: ""
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|
||||||
property bool active: false
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|
||||||
|
|
||||||
signal eventReceived(string data, string id)
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|
||||||
signal stateChanged(string state)
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|
||||||
|
|
||||||
property var _xhr: null
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|
||||||
property int _offset: 0
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|
||||||
property string _accumulated: ""
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|
||||||
|
|
||||||
function connect() {
|
|
||||||
if (active) return
|
|
||||||
_offset = 0
|
|
||||||
_accumulated = ""
|
|
||||||
|
|
||||||
const xhr = new XMLHttpRequest()
|
|
||||||
xhr.open("GET", url)
|
|
||||||
xhr.setRequestHeader("Accept", "text/event-stream")
|
|
||||||
xhr.onreadystatechange = function() {
|
|
||||||
if (xhr.readyState === XMLHttpRequest.LOADING ||
|
|
||||||
xhr.readyState === XMLHttpRequest.DONE) {
|
|
||||||
const text = xhr.responseText
|
|
||||||
if (text.length > _offset) {
|
|
||||||
const fresh = text.substring(_offset)
|
|
||||||
_offset = text.length
|
|
||||||
_ingest(fresh)
|
|
||||||
}
|
|
||||||
}
|
|
||||||
if (xhr.readyState === XMLHttpRequest.DONE) {
|
|
||||||
active = false
|
|
||||||
stateChanged("disconnected")
|
|
||||||
}
|
|
||||||
}
|
|
||||||
xhr.send()
|
|
||||||
_xhr = xhr
|
|
||||||
active = true
|
|
||||||
stateChanged("connected")
|
|
||||||
}
|
|
||||||
|
|
||||||
function disconnect() {
|
|
||||||
if (!active) return
|
|
||||||
if (_xhr) _xhr.abort()
|
|
||||||
active = false
|
|
||||||
stateChanged("disconnected")
|
|
||||||
}
|
|
||||||
|
|
||||||
function _ingest(chunk) {
|
|
||||||
_accumulated += chunk
|
|
||||||
const parts = _accumulated.split("\n\n")
|
|
||||||
_accumulated = parts.pop()
|
|
||||||
for (let i = 0; i < parts.length; ++i) {
|
|
||||||
_emit(parts[i])
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
function _emit(message) {
|
|
||||||
const lines = message.split("\n")
|
|
||||||
let id = ""
|
|
||||||
let dataLines = []
|
|
||||||
for (let i = 0; i < lines.length; ++i) {
|
|
||||||
const line = lines[i]
|
|
||||||
if (line.length === 0 || line.charAt(0) === ":") continue
|
|
||||||
const colon = line.indexOf(":")
|
|
||||||
if (colon < 0) continue
|
|
||||||
const field = line.substring(0, colon)
|
|
||||||
let value = line.substring(colon + 1)
|
|
||||||
if (value.length > 0 && value.charAt(0) === " ") value = value.substring(1)
|
|
||||||
if (field === "data") dataLines.push(value)
|
|
||||||
else if (field === "id") id = value
|
|
||||||
}
|
|
||||||
if (dataLines.length > 0) {
|
|
||||||
eventReceived(dataLines.join("\n"), id)
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
@@ -1,72 +0,0 @@
|
|||||||
#include <QCoreApplication>
|
|
||||||
#include <QGuiApplication>
|
|
||||||
#include <QQmlApplicationEngine>
|
|
||||||
#include <QProcess>
|
|
||||||
#include <QDir>
|
|
||||||
#include <QFileInfo>
|
|
||||||
#include <QObject>
|
|
||||||
#include <QDebug>
|
|
||||||
|
|
||||||
#include <csignal>
|
|
||||||
#include <sys/prctl.h>
|
|
||||||
|
|
||||||
// Resolve the spike root by walking up from the running binary
|
|
||||||
// until we find a directory containing Caddyfile + bin/frankenphp.
|
|
||||||
static QString resolveSpikeRoot()
|
|
||||||
{
|
|
||||||
QDir d(QCoreApplication::applicationDirPath());
|
|
||||||
for (int i = 0; i < 6; ++i) {
|
|
||||||
if (QFileInfo(d.filePath("Caddyfile")).exists() &&
|
|
||||||
QFileInfo(d.filePath("bin/frankenphp")).exists()) {
|
|
||||||
return d.absolutePath();
|
|
||||||
}
|
|
||||||
if (!d.cdUp()) break;
|
|
||||||
}
|
|
||||||
qWarning() << "Could not locate spike root from"
|
|
||||||
<< QCoreApplication::applicationDirPath();
|
|
||||||
return QCoreApplication::applicationDirPath();
|
|
||||||
}
|
|
||||||
|
|
||||||
// SIGTERM / SIGINT → graceful Qt quit so aboutToQuit cleanup runs.
|
|
||||||
static void installSignalHandlers()
|
|
||||||
{
|
|
||||||
auto handler = +[](int) { QCoreApplication::quit(); };
|
|
||||||
std::signal(SIGTERM, handler);
|
|
||||||
std::signal(SIGINT, handler);
|
|
||||||
}
|
|
||||||
|
|
||||||
int main(int argc, char *argv[])
|
|
||||||
{
|
|
||||||
QGuiApplication app(argc, argv);
|
|
||||||
installSignalHandlers();
|
|
||||||
|
|
||||||
const QString spikeRoot = resolveSpikeRoot();
|
|
||||||
qInfo() << "spike root:" << spikeRoot;
|
|
||||||
|
|
||||||
QProcess franken;
|
|
||||||
franken.setProgram(spikeRoot + "/bin/frankenphp");
|
|
||||||
franken.setArguments({"run", "--config", spikeRoot + "/Caddyfile"});
|
|
||||||
franken.setWorkingDirectory(spikeRoot);
|
|
||||||
franken.setProcessChannelMode(QProcess::ForwardedChannels);
|
|
||||||
|
|
||||||
// Linux belt-and-suspenders: ask the kernel to SIGTERM the child
|
|
||||||
// when this process dies, regardless of how (crash, kill -9, etc.).
|
|
||||||
franken.setChildProcessModifier([] {
|
|
||||||
prctl(PR_SET_PDEATHSIG, SIGTERM);
|
|
||||||
});
|
|
||||||
|
|
||||||
franken.start();
|
|
||||||
|
|
||||||
QObject::connect(&app, &QCoreApplication::aboutToQuit, [&]() {
|
|
||||||
if (franken.state() == QProcess::NotRunning) return;
|
|
||||||
franken.terminate();
|
|
||||||
if (!franken.waitForFinished(2000)) franken.kill();
|
|
||||||
});
|
|
||||||
|
|
||||||
QQmlApplicationEngine engine;
|
|
||||||
engine.loadFromModule("Spike", "Main");
|
|
||||||
|
|
||||||
if (engine.rootObjects().isEmpty()) return -1;
|
|
||||||
|
|
||||||
return app.exec();
|
|
||||||
}
|
|
||||||
22
spike/run.sh
22
spike/run.sh
@@ -1,22 +0,0 @@
|
|||||||
#!/usr/bin/env bash
|
|
||||||
# Build (if needed) and run the Phase 0 spike.
|
|
||||||
# Toolchain expected on PATH: cmake, qmake6 (or qmake from qt6-base-devel), g++.
|
|
||||||
set -euo pipefail
|
|
||||||
|
|
||||||
SPIKE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
|
|
||||||
BUILD_DIR="$SPIKE_DIR/build"
|
|
||||||
BIN="$BUILD_DIR/spike"
|
|
||||||
|
|
||||||
if [ ! -x "$SPIKE_DIR/bin/frankenphp" ]; then
|
|
||||||
echo "missing $SPIKE_DIR/bin/frankenphp — run download from spike/README.md" >&2
|
|
||||||
exit 1
|
|
||||||
fi
|
|
||||||
|
|
||||||
if [ ! -x "$BIN" ]; then
|
|
||||||
echo "==> configuring + building Qt host"
|
|
||||||
cmake -S "$SPIKE_DIR/qt" -B "$BUILD_DIR" -DCMAKE_BUILD_TYPE=Debug
|
|
||||||
cmake --build "$BUILD_DIR" --parallel
|
|
||||||
fi
|
|
||||||
|
|
||||||
echo "==> launching spike"
|
|
||||||
exec "$BIN"
|
|
||||||
Reference in New Issue
Block a user