From fda71be7427ef0fd5d4a0107ca839ae7f0a79dfd Mon Sep 17 00:00:00 2001
From: Blake Gentry <blakesgentry@gmail.com>
Date: Mon, 6 May 2024 09:59:15 -0500
Subject: [PATCH] inject .env file on Render builds

---
 Dockerfile           | 5 ++++-
 ui/src/vite-env.d.ts | 8 ++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index b53e2eb..ce3469e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,10 @@ COPY ui/package.json ui/package-lock.json ./
 RUN npm install
 ENV NODE_ENV=production
 COPY ui/ .
-RUN npm run build
+# TODO: this is a Render-specific build-time env var hack and isn't suitable for
+# a published Dockerfile:
+RUN --mount=type=secret,id=_env,dst=/app/.env \
+  npm exec vite build
 
 # Build the Go binary, including embedded UI files:
 FROM golang:1.22.2-alpine AS build-go
diff --git a/ui/src/vite-env.d.ts b/ui/src/vite-env.d.ts
index 19bfac9..8ff4ccf 100644
--- a/ui/src/vite-env.d.ts
+++ b/ui/src/vite-env.d.ts
@@ -1,2 +1,10 @@
 /// <reference types="./global-type-overrides.d.ts" />
 /// <reference types="vite/client" />
+
+interface ImportMetaEnv {
+  readonly VITE_RIVER_API_BASE_URL: string;
+}
+
+interface ImportMeta {
+  readonly env: ImportMetaEnv;
+}