From 42bfc2540bd8d77f25a4651935a36774e989dada Mon Sep 17 00:00:00 2001
From: uh wot <uhwot@protonmail.com>
Date: Mon, 5 Dec 2022 16:24:18 +0100
Subject: [PATCH] updated dockerfile

https://github.com/fly-apps/hello-rust/pull/9
---
 Dockerfile | 19 +++++--------------
 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 1d4444d..1f52724 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,20 +1,11 @@
 FROM rust:latest as builder
 
-# Make a fake Rust app to keep a cached layer of compiled crates
-RUN USER=root cargo new app
 WORKDIR /usr/src/app
-COPY Cargo.toml Cargo.lock ./
-# Needs at least a main.rs file with a main function
-RUN mkdir src && echo "fn main(){}" > src/main.rs
-# Will build all dependent crates in release mode
-RUN --mount=type=cache,target=/usr/local/cargo/registry \
-    --mount=type=cache,target=/usr/src/app/target \
-    cargo build --release
-
-# Copy the rest
 COPY . .
-# Build (install) the actual binaries
-RUN cargo install --path .
+# Will build and cache the binary and dependent crates in release mode
+RUN --mount=type=cache,target=/usr/local/cargo,from=rust:latest,source=/usr/local/cargo \
+    --mount=type=cache,target=target \
+    cargo build --release && mv ./target/release/dzmedia ./dzmedia
 
 # Runtime image
 FROM debian:bullseye-slim
@@ -26,6 +17,6 @@ USER app
 WORKDIR /app
 
 # Get compiled binaries from builder's cargo install directory
-COPY --from=builder /usr/local/cargo/bin/dzmedia /app/dzmedia
+COPY --from=builder /usr/src/app/dzmedia /app/dzmedia
 
 # No CMD or ENTRYPOINT, see fly.toml with `cmd` override.
\ No newline at end of file