gerrit: add ref-updated hook to poke forgejo

This has been deployed already.

Technically depends on I26531818a395de2a8bb6054d2583881fd1d5b806 as this
has been deployed on top of that.

Change-Id: I1b8d453d04f3a9a5435ae0dd6575f82d9ca10db7
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1681
Reviewed-by: informatic <informatic@hackerspace.pl>

devtools/gerrit/entrypoint.sh

@@ -18,6 +18,8 @@ rm -f /var/gerrit/etc/secure.config
 cp /var/gerrit-secure/secure.config /var/gerrit/etc/secure.config
 
 cp /var/gerrit-plugins/* /var/gerrit/plugins/
+mkdir -p /var/gerrit/hooks/
+cp /var/gerrit-hooks/* /var/gerrit/hooks/
 
 mkdir -p /var/gerrit/static
 cp -r /var/gerrit-theme/*png /var/gerrit/static/

devtools/gerrit/hooks/ref-updated

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -e
+
+# This will be ran by Gerrit any time a new Git commit is pushed, and will make
+# Forgejo pull our changes.
+
+if [ -z "$FORGEJO_TOKEN" ]; then
+    echo "FORGEJO_TOKEN must be set" > /dev/stderr
+    exit 1
+fi
+
+# The gerrit image has no curl. But where we're going, we don't need curl.
+auth="$(echo -ne "gerrit:$FORGEJO_TOKEN" | base64)"
+openssl s_client -quiet -crlf -connect git.hackerspace.pl:443 <<EOF
+POST /api/v1/repos/hswaw/hscloud/mirror-sync HTTP/1.1
+Host: git.hackerspace.pl
+Authorization: Basic $auth
+Content-length: 0
+Connection: Close
+
+EOF

devtools/gerrit/kube/gerrit.libsonnet

@@ -38,7 +38,7 @@ local kube = import "../../../kube/kube.libsonnet";
             address: "gerrit@hackerspace.pl",
         },
 
-        tag: "3.3.2-r4",
+        tag: "3.7.5-r7",
         image: "registry.k0.hswaw.net/q3k/gerrit:" + cfg.tag,
         resources: {
             requests: {
@@ -159,6 +159,12 @@ local kube = import "../../../kube/kube.libsonnet";
         // SecureSecret gets mounted here
         secure: { mountPath: "/var/gerrit-secure" },
     },
+    keys: kube.Secret(gerrit.name("keys")) {
+        metadata+: gerrit.metadata("deployment"),
+        //data_: {
+        //    FORGEJO_TOKEN: "fill me when deploying, TODO(q3k): god damn secrets",
+        //},
+    },
     deployment: kube.Deployment(gerrit.name("gerrit")) {
         metadata+: gerrit.metadata("deployment"),
         spec+: {
@@ -182,6 +188,9 @@ local kube = import "../../../kube/kube.libsonnet";
                                 http: { containerPort: 8080 },
                                 ssh: { containerPort: 29418 },
                             },
+                            env_: {
+                                FORGEJO_TOKEN: { secretKeyRef: { name: gerrit.keys.metadata.name, key: "FORGEJO_TOKEN" }},
+                            },
                             resources: cfg.resources,
                             volumeMounts_: volumeMounts,