🚧 🐳 Experimenting with a new Dockerfile

Cargo.toml

@@ -17,11 +17,8 @@ tokio = { version = "0.2.22", features = ["full"] }
 tracing = "0.1.21"
 tracing-subscriber = "0.2.15"
 
-always_equal = { path = "crates/always_equal" }
-ptth_core = { path = "crates/ptth_core" }
 ptth_relay = { path = "crates/ptth_relay" }
 ptth_server = { path = "crates/ptth_server" }
-ptth_file_server = { path = "crates/ptth_file_server_bin" }
 
 [workspace]
 

new-Dockerfile

@@ -0,0 +1,68 @@
+# Mix of https://whitfin.io/speeding-up-rust-docker-builds/
+# and a "minimal Rust Docker image!" GH repo which was just 
+# "lol use Alpine duh"
+
+FROM rust:1.47-slim-buster as build
+
+#RUN apk add libseccomp-dev
+
+WORKDIR /
+ENV USER root
+
+# create empty shell projects
+RUN cargo new --bin ptth
+
+WORKDIR /ptth
+
+RUN \
+cargo new --lib crates/always_equal && \
+cargo new --lib crates/ptth_core && \
+cargo new --bin crates/ptth_file_server_bin && \
+cargo new --bin crates/ptth_relay && \
+cargo new --bin crates/ptth_server
+
+# copy over your manifests
+COPY ./Cargo.lock                     ./Cargo.lock
+COPY ./Cargo.toml                     ./Cargo.toml
+COPY ./crates/always_equal/Cargo.toml ./crates/always_equal/Cargo.toml
+COPY ./crates/ptth_core/Cargo.toml    ./crates/ptth_core/Cargo.toml
+COPY ./crates/ptth_relay/Cargo.toml   ./crates/ptth_relay/Cargo.toml
+COPY ./crates/ptth_file_server_bin/Cargo.toml   ./crates/ptth_file_server_bin/Cargo.toml
+COPY ./crates/ptth_server/Cargo.toml   ./crates/ptth_server/Cargo.toml
+
+# this build step will cache your dependencies
+RUN cargo build --release -p ptth_relay
+
+RUN \
+rm \
+src/*.rs \
+crates/always_equal/src/*.rs \
+crates/ptth_core/src/*.rs \
+crates/ptth_file_server_bin/src/*.rs \
+crates/ptth_relay/src/*.rs \
+crates/ptth_server/src/*.rs
+
+# copy source tree
+COPY ./src        ./src
+COPY ./crates     ./crates
+COPY ./handlebars ./handlebars
+
+# Bug in cargo's incremental build logic, triggered by
+# Docker doing something funny with mtimes? Maybe?
+RUN touch crates/ptth_core/src/lib.rs
+
+# build for release
+RUN cargo build --release -p ptth_relay
+
+FROM debian:buster-slim
+
+RUN apt-get update \
+&& apt-get install -y libssl1.1 ca-certificates \
+&& apt-get upgrade -y
+
+COPY --from=build /ptth/target/release/ptth_relay /root/ptth_relay
+COPY --from=build /ptth/crates/ptth_relay/src/git_version.rs /root/git_version.rs
+COPY --from=build /ptth/handlebars /root/handlebars
+
+WORKDIR /root
+ENTRYPOINT ["./ptth_relay"]