From a697b3a6f15148a01fdcc1c6d6e87ed4d7939f81 Mon Sep 17 00:00:00 2001
From: Gabriel Augendre <gabriel@augendre.info>
Date: Sat, 25 Mar 2023 21:06:04 +0100
Subject: [PATCH] Add a ping page with the commit sha

---
 .github/workflows/publish.yaml        |  2 +-
 src/checkout/settings.py              | 24 ++++++++++++++++++++++++
 src/common/context_processors.py      |  5 +++++
 src/common/templates/common/ping.html | 10 ++++++++++
 src/common/urls.py                    |  3 ++-
 src/common/views.py                   |  6 +++++-
 6 files changed, 47 insertions(+), 3 deletions(-)
 create mode 100644 src/common/context_processors.py
 create mode 100644 src/common/templates/common/ping.html

diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 5a9d65d..621cfe8 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -50,4 +50,4 @@ jobs:
           max_attempts: 5
           retry_wait_seconds: 2
           warning_on_retry: false
-          command: curl -sSL --fail -m 10 https://checkout.augendre.info | grep ${GITHUB_SHA::7} > /dev/null
+          command: curl -sSL --fail -m 10 https://checkout.augendre.info/ping/ | grep ${GITHUB_SHA::7} > /dev/null
diff --git a/src/checkout/settings.py b/src/checkout/settings.py
index 1566242..e344397 100644
--- a/src/checkout/settings.py
+++ b/src/checkout/settings.py
@@ -129,6 +129,7 @@ TEMPLATES = [
                 "django.template.context_processors.request",
                 "django.contrib.auth.context_processors.auth",
                 "django.contrib.messages.context_processors.messages",
+                "common.context_processors.app",
             ],
         },
     },
@@ -228,3 +229,26 @@ CRISPY_ALLOWED_TEMPLATE_PACKS = "bootstrap5"
 CRISPY_TEMPLATE_PACK = "bootstrap5"
 
 MESSAGE_TAGS = {messages.ERROR: "danger"}
+
+APP = {
+    "build": {
+        "date": "latest-date",
+        "commit": "latest-commit",
+        "describe": "latest-describe",
+    },
+}
+try:
+    with Path("/app/git/build-date").open() as f:
+        APP["build"]["date"] = f.read().strip()
+except Exception:  # noqa: S110
+    pass
+try:
+    with Path("/app/git/git-commit").open() as f:
+        APP["build"]["commit"] = f.read().strip()
+except Exception:  # noqa: S110
+    pass
+try:
+    with Path("/app/git/git-describe").open() as f:
+        APP["build"]["describe"] = f.read().strip()
+except Exception:  # noqa: S110
+    pass
diff --git a/src/common/context_processors.py b/src/common/context_processors.py
new file mode 100644
index 0000000..956ba17
--- /dev/null
+++ b/src/common/context_processors.py
@@ -0,0 +1,5 @@
+from django.conf import settings
+
+
+def app(_):
+    return settings.APP
diff --git a/src/common/templates/common/ping.html b/src/common/templates/common/ping.html
new file mode 100644
index 0000000..1288535
--- /dev/null
+++ b/src/common/templates/common/ping.html
@@ -0,0 +1,10 @@
+{% extends "common/base.html" %}
+{% block content %}
+    <h1>Ping</h1>
+    <h2>Versions</h2>
+    <ul>
+        <li>Build date: {{ build.date }}</li>
+        <li>Commit: {{ build.commit }}</li>
+        <li>Version: {{ build.describe }}</li>
+    </ul>
+{% endblock %}
diff --git a/src/common/urls.py b/src/common/urls.py
index d33a0c7..da64f49 100644
--- a/src/common/urls.py
+++ b/src/common/urls.py
@@ -1,8 +1,9 @@
 from django.urls import path
 
-from common.views import home
+from common.views import home, ping
 
 app_name = "common"
 urlpatterns = [
+    path("ping/", ping, name="ping"),
     path("", home, name="home"),
 ]
diff --git a/src/common/views.py b/src/common/views.py
index 5174e1c..6343d26 100644
--- a/src/common/views.py
+++ b/src/common/views.py
@@ -1,5 +1,9 @@
-from django.shortcuts import redirect
+from django.shortcuts import redirect, render
 
 
 def home(_request):
     return redirect("purchase:new")
+
+
+def ping(request):
+    return render(request, "common/ping.html", {})