test: adapt caddy testing environment into a smoke test

Signed-off-by: Xe Iaso <me@xeiaso.net>

test/lib/lib.sh

@@ -0,0 +1,54 @@
+REPO_ROOT=$(git rev-parse --show-toplevel)
+(cd $REPO_ROOT && go install ./utils/cmd/...)
+
+function cleanup() {
+  pkill -P $$
+
+  if [ -f "docker-compose.yaml" ]; then
+    docker compose down
+  fi
+}
+
+trap cleanup EXIT SIGINT
+
+function build_anubis_ko() {
+  (
+    cd ../.. &&
+      VERSION=devel ko build \
+        --platform=all \
+        --base-import-paths \
+        --tags="latest" \
+        --image-user=1000 \
+        --image-annotation="" \
+        --image-label="" \
+        ./cmd/anubis \
+        -L
+  )
+}
+
+function mint_cert() {
+  if [ "$#" -ne 1 ]; then
+    echo "Usage: mint_cert <domain.name>"
+  fi
+
+  domainName="$1"
+
+  # If the transient local TLS certificate doesn't exist, mint a new one
+  if [ ! -f "../pki/${domainName}/cert.pem" ]; then
+    # Subshell to contain the directory change
+    (
+      cd ../pki &&
+        mkdir -p "${domainName}" &&
+        # Try using https://github.com/FiloSottile/mkcert for better DevEx,
+        # but fall back to using https://github.com/jsha/minica in case
+        # you don't have that installed.
+        (
+          mkcert \
+            --cert-file ./"${domainName}"/cert.pem \
+            --key-file ./"${domainName}"/key.pem \
+            "${domainName}" ||
+            go tool minica -domains "${domainName}"
+        )
+    )
+  fi
+}