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perf: use cargo-chef in Dockerfile for dependency caching

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Splits the build into planner/deps/builder stages. Dependencies are
only recompiled when Cargo.toml or Cargo.lock change. Source-only
changes skip straight to the final build stage.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
This commit is contained in:
Illia Polosukhin
2026-03-26 09:21:34 -07:00
co-authored by Claude Opus 4.6
parent 4a75c11477
commit 4bba26ea7f
1 changed files with 33 additions and 8 deletions
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Dockerfile
+33 -8
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@@ -1,41 +1,66 @@
# Multi-stage Dockerfile for the IronClaw agent (cloud deployment).
#
# Uses cargo-chef for dependency caching — only rebuilds deps when
# Cargo.toml/Cargo.lock change, not on every source edit.
#
# Build:
# docker build --platform linux/amd64 -t ironclaw:latest .
#
# Run:
# docker run --env-file .env -p 3000:3000 ironclaw:latest
# Stage 1: Build
FROM rust:1.92-slim-bookworm AS builder
# Stage 1: Install cargo-chef
FROM rust:1.92-slim-bookworm AS chef
RUN apt-get update && apt-get install -y --no-install-recommends \
pkg-config libssl-dev cmake gcc g++ \
&& rm -rf /var/lib/apt/lists/* \
&& rustup target add wasm32-wasip2 \
&& cargo install wasm-tools
&& cargo install cargo-chef wasm-tools
WORKDIR /app
# Copy manifests first for layer caching
# Stage 2: Generate the dependency recipe (changes only when Cargo.toml/lock change)
FROM chef AS planner
COPY Cargo.toml Cargo.lock ./
COPY crates/ crates/
# Copy source, build script, tests, and supporting directories
COPY build.rs build.rs
COPY src/ src/
COPY tests/ tests/
COPY benches/ benches/
COPY migrations/ migrations/
COPY registry/ registry/
COPY channels-src/ channels-src/
COPY wit/ wit/
COPY providers.json providers.json
# [[bench]] entries in Cargo.toml require bench sources to exist for cargo to parse the manifest
RUN cargo chef prepare --recipe-path recipe.json
# Stage 3: Build dependencies (cached unless Cargo.toml/lock change)
FROM chef AS deps
COPY --from=planner /app/recipe.json recipe.json
RUN cargo chef cook --release --recipe-path recipe.json
# Stage 4: Build the actual binary (only recompiles ironclaw source)
FROM deps AS builder
COPY Cargo.toml Cargo.lock ./
COPY crates/ crates/
COPY build.rs build.rs
COPY src/ src/
COPY tests/ tests/
COPY benches/ benches/
COPY migrations/ migrations/
COPY registry/ registry/
COPY channels-src/ channels-src/
COPY wit/ wit/
COPY providers.json providers.json
RUN cargo build --release --bin ironclaw
# Stage 2: Runtime
# Stage 5: Runtime
FROM debian:bookworm-slim
RUN apt-get update && apt-get install -y --no-install-recommends \