Update to Rust 1.42.0 (#483)

Also, modify update-rust-version.sh to operate on all Dockerfiles in the
repo.

.github/actions/package/Dockerfile

@@ -1,4 +1,4 @@
-ARG BASE_IMAGE=rust:1.41.0-buster
+ARG BASE_IMAGE=rust:1.42.0-buster
 FROM $BASE_IMAGE
 WORKDIR /linkerd
 RUN apt-get update && \

.github/actions/remote/Dockerfile

@@ -1,5 +1,5 @@
 # Intended to be run on a remote DOCKER_HOST
-ARG RUST_IMAGE=rust:1.37.0-buster
+ARG RUST_IMAGE=rust:1.42.0-buster
 FROM $RUST_IMAGE as build
 WORKDIR /usr/src/linkerd2-proxy
 COPY . ./

.github/workflows/rust.yml

@@ -10,7 +10,7 @@ jobs:
   fmt:
     runs-on: ubuntu-18.04
     container:
-      image: docker://rust:1.41.0-buster
+      image: docker://rust:1.42.0-buster
     steps:
     - uses: actions/checkout@v1
     - run: rustup component add rustfmt
@@ -19,7 +19,7 @@ jobs:
   lib:
     runs-on: ubuntu-18.04
     container:
-      image: docker://rust:1.41.0-buster
+      image: docker://rust:1.42.0-buster
     steps:
     - uses: actions/checkout@v1
     - run: make test-lib

Dockerfile

@@ -17,7 +17,7 @@
 #     :; docker buildx build . --load
 
 # Please make changes via update-rust-version.sh
-ARG RUST_IMAGE=rust:1.41.0-buster
+ARG RUST_IMAGE=rust:1.42.0-buster
 
 # Use an arbitrary ~recent edge release image to get the proxy
 # identity-initializing wrapper.
@@ -38,7 +38,7 @@ ARG PROXY_FEATURES
 WORKDIR /usr/src/linkerd2-proxy
 COPY . .
 RUN --mount=type=cache,target=target \
-    --mount=type=cache,from=rust:1.41.0-buster,source=/usr/local/cargo,target=/usr/local/cargo \
+    --mount=type=cache,from=rust:1.42.0-buster,source=/usr/local/cargo,target=/usr/local/cargo \
     mkdir -p /out && \
     if [ -n "$PROXY_UNOPTIMIZED" ]; then \
       (cd linkerd2-proxy && cargo build --locked --features="$PROXY_FEATURES") && \

profiling/Dockerfile-proxy

@@ -1,4 +1,4 @@
-ARG RUST_IMAGE=rust:1.41.0-buster
+ARG RUST_IMAGE=rust:1.42.0-buster
 ARG RUNTIME_IMAGE=debian:bullseye-slim
 ARG RUSTFLAGS="-C debuginfo=2 -C lto=off"
 ## Builds the proxy as incrementally as possible.

rust-toolchain

@@ -1 +1 @@
-1.41.0
+1.42.0

update-rust-version.sh

@@ -14,7 +14,7 @@ if ! echo "$VERSION" | grep -qE '^[0-9]+\.[0-9]+\.[0-9]+$' ; then
 fi
 
 echo "$VERSION" > rust-toolchain
-sed -i'' -Ee "s/rust:[0-9]+\.[0-9]+\.[0-9]+/rust:$VERSION/" Dockerfile
-
-find .github -name \*.yml -or -name Dockerfile\* \
+find . -name Dockerfile\* \
+    -exec sed -i'' -Ee "s|rust:[0-9]+\.[0-9]+\.[0-9]+|rust:$VERSION|" '{}' \;
+find .github -name \*.yml \
     -exec sed -i'' -Ee "s|rust:[0-9]+\.[0-9]+\.[0-9]+|rust:$VERSION|" '{}' \;