Replace cachepot with sccache

.github/workflows/neon_extra_builds.yml

@@ -357,7 +357,7 @@ jobs:
 
     env:
       BUILD_TYPE: release
-      # remove the cachepot wrapper and build without crate caches
+      # remove the sccache wrapper and build without crate caches
       RUSTC_WRAPPER: ""
       # build with incremental compilation produce partial results
       # so do not attempt to cache this build, also disable the incremental compilation

Dockerfile

@@ -29,13 +29,13 @@ WORKDIR /home/nonroot
 ARG GIT_VERSION=local
 ARG BUILD_TAG
 
-# Enable https://github.com/paritytech/cachepot to cache Rust crates' compilation results in Docker builds.
-# Set up cachepot to use an AWS S3 bucket for cache results, to reuse it between `docker build` invocations.
-# cachepot falls back to local filesystem if S3 is misconfigured, not failing the build
-ARG RUSTC_WRAPPER=cachepot
-ENV AWS_REGION=eu-central-1
-ENV CACHEPOT_S3_KEY_PREFIX=cachepot
-ARG CACHEPOT_BUCKET=neon-github-dev
+# Enable https://github.com/mozilla/sccache to cache Rust crates' compilation results in Docker builds.
+# Set up sccache to use an AWS S3 bucket for cache results, to reuse it between `docker build` invocations.
+# sccache falls back to local filesystem if S3 is misconfigured, not failing the build
+ARG RUSTC_WRAPPER=sccache
+ARG SCCACHE_REGION=eu-central-1
+ARG SCCACHE_S3_KEY_PREFIX=sccache
+ARG SCCACHE_BUCKET=neon-github-dev
 #ARG AWS_ACCESS_KEY_ID
 #ARG AWS_SECRET_ACCESS_KEY
 
@@ -45,7 +45,7 @@ COPY --from=pg-build /home/nonroot/pg_install/v16/include/postgresql/server pg_i
 COPY --chown=nonroot . .
 
 # Show build caching stats to check if it was used in the end.
-# Has to be the part of the same RUN since cachepot daemon is killed in the end of this RUN, losing the compilation stats.
+# Has to be the part of the same RUN since sccache daemon is killed in the end of this RUN, losing the compilation stats.
 RUN set -e \
     && RUSTFLAGS="-Clinker=clang -Clink-arg=-fuse-ld=mold -Clink-arg=-Wl,--no-rosegment" cargo build  \
       --bin pg_sni_router  \
@@ -57,7 +57,7 @@ RUN set -e \
       --bin proxy  \
       --bin neon_local \
       --locked --release \
-    && cachepot -s
+    && sccache -s
 
 # Build final image
 #

Dockerfile.build-tools

@@ -184,7 +184,7 @@ RUN curl -sSO https://static.rust-lang.org/rustup/dist/$(uname -m)-unknown-linux
     . "$HOME/.cargo/env" && \
     cargo --version && rustup --version && \
     rustup component add llvm-tools-preview rustfmt clippy && \
-    cargo install --git https://github.com/paritytech/cachepot && \
+    cargo install sccache && \
     cargo install rustfilt && \
     cargo install cargo-hakari && \
     cargo install cargo-deny --locked && \
@@ -192,7 +192,7 @@ RUN curl -sSO https://static.rust-lang.org/rustup/dist/$(uname -m)-unknown-linux
     cargo install cargo-nextest && \
     rm -rf /home/nonroot/.cargo/registry && \
     rm -rf /home/nonroot/.cargo/git
-ENV RUSTC_WRAPPER=cachepot
+ENV RUSTC_WRAPPER=sccache
 
 # Show versions
 RUN whoami \

libs/utils/src/lib.rs

@@ -124,9 +124,9 @@ pub mod poison;
 ///
 /// #############################################################################################
 /// TODO this macro is not the way the library is intended to be used, see <https://github.com/neondatabase/neon/issues/1565> for details.
-/// We use `cachepot` to reduce our current CI build times: <https://github.com/neondatabase/cloud/pull/1033#issuecomment-1100935036>
+/// We use `sccache` to reduce our current CI build times: <https://github.com/neondatabase/cloud/pull/1033#issuecomment-1100935036>
 /// Yet, it seems to ignore the GIT_VERSION env variable, passed to Docker build, even with build.rs that contains
-/// `println!("cargo:rerun-if-env-changed=GIT_VERSION");` code for cachepot cache invalidation.
+/// `println!("cargo:rerun-if-env-changed=GIT_VERSION");` code for sccache cache invalidation.
 /// The problem needs further investigation and regular `const` declaration instead of a macro.
 #[macro_export]
 macro_rules! project_git_version {

storage_broker/build.rs

@@ -2,7 +2,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Generate rust code from .proto protobuf.
     //
     // Note: we previously tried to use deterministic location at proto/ for
-    // easy location, but apparently interference with cachepot sometimes fails
+    // easy location, but apparently interference with sccache sometimes fails
     // the build then. Anyway, per cargo docs build script shouldn't output to
     // anywhere but $OUT_DIR.
     tonic_build::compile_protos("proto/broker.proto")