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Cache Rust dependencies in a separate Docker layer #76

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Merged
Insprill merged 1 commit into from
Oct 18, 2026
Merged

Cache Rust dependencies in a separate Docker layer #76

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7 changes: 6 additions & 1 deletion Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -7,10 +7,15 @@ RUN apk add --no-cache musl-dev

WORKDIR /intellectual

# Build dependencies in their own layer so it stays cached until Cargo.toml or Cargo.lock change
COPY Cargo.toml Cargo.lock ./
RUN mkdir src && echo 'fn main() {}' > src/main.rs && cargo build --release && rm -rf src

COPY . .

# Set environment variables so the build has git info
RUN export $(cat .env | xargs) && cargo build --release
# main.rs is touched because COPY keeps its old mtime, which cargo would treat as already built
RUN export $(cat .env | xargs) && touch src/main.rs && cargo build --release

####################################################################################################
## Final image
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