Dockerfile: add protobuf-compiler for vls signer step
What the developer wrote
Authored by daywalker90
Dockerfile: add protobuf-compiler for vls signer step
After 608f6952ea2772a31f4699580bce75a8f82f7f1c the vls docker image build fails
because it is missing protoc.
```
> [vls-builder 9/10] RUN cargo build --release --target x86_64-unknown-linux-gnu:
177.2
177.2 Caused by:
177.2 process didn't exit successfully: `/opt/validating-lightning-signer/target/release/build/lightning-storage-server-85c73031cf3e0f51/build-script-build` (exit status: 1)
177.2 --- stdout
177.2 cargo:rerun-if-changed=proto/lss.proto
177.2 cargo:rerun-if-changed=proto
177.2
177.2 --- stderr
177.2 Error: Custom { kind: NotFound, error: "Could not find `protoc`. If `protoc` is installed, try setting the `PROTOC` environment variable to the path of the `protoc` binary. To install it on Debian, run `apt-get install protobuf-compiler`. It is also available at https://github.com/protocolbuffers/protobuf/releases For more information: https://docs.rs/prost-build/#sourcing-protoc" }
177.2 warning: build failed, waiting for other jobs to finish...
```
vls 0.14 also has an external dependency that requires protoc, so vls vendoring it would not be enough.
What changed, and why it matters
This commit fixes a Docker image build failure by adding the missing protobuf-compiler package. It is a build tooling fix with no security relevance.
No security action required; treat as routine build fix.
Security signals we found
No strong security signals were identified.
Evidence from the diff
The Dockerfile for building the validating-lightning-signer (vls) image is updated to install protobuf-compiler (protoc), which became required after a prior commit. The change resolves a build-time ‘Could not find protoc’ error during cargo build. There is no code logic change and no runtime security boundary affected.
Changed components
Dockerfile (vls-builder stage)Inspect captured patch +1 / −0
diff --git a/Dockerfile b/Dockerfile
index 6714e5f4..b6285d8b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -188,6 +188,7 @@ RUN dpkg --add-architecture ${target_arch_dpkg}
RUN apt-get update && \
apt-get install -qq -y --no-install-recommends \
+ protobuf-compiler \
pkg-config:${target_arch_dpkg} \
crossbuild-essential-${target_arch_dpkg} && \
apt-get clean && \
Why this scored 15/100
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