Upgrade clang-format-8

templates/tools/dockerfile/grpc_clang_format/Dockerfile.template

@@ -16,7 +16,13 @@
 
   FROM debian:10
 
-  RUN apt-get update && apt-get install -y clang-format
+  # Add buster-backports for more recent clang packages
+  RUN echo "deb http://deb.debian.org/debian buster-backports main" | tee /etc/apt/sources.list.d/buster-backports.list
+
+  # Install clang-format
+  RUN apt-get update && apt-get install -y clang-format-8
+  ENV CLANG_FORMAT=clang-format-8
+
   ADD clang_format_all_the_things.sh /
   
   # When running locally, we'll be impersonating the current user, so we need

templates/tools/dockerfile/test/sanity/Dockerfile.template

@@ -37,8 +37,8 @@
   RUN echo "deb http://deb.debian.org/debian buster-backports main" | tee /etc/apt/sources.list.d/buster-backports.list
 
   # Install clang, clang-format, and clang-tidy
-  RUN apt-get update && apt-get install -y clang clang-format-7 clang-tidy-8 jq
+  RUN apt-get update && apt-get install -y clang clang-format-8 clang-tidy-8 jq
-  ENV CLANG_FORMAT=clang-format-7
+  ENV CLANG_FORMAT=clang-format-8
   ENV CLANG_TIDY=clang-tidy-8
 
 

tools/dockerfile/grpc_clang_format/Dockerfile

@@ -14,7 +14,13 @@
 
 FROM debian:10
 
-RUN apt-get update && apt-get install -y clang-format
+# Add buster-backports for more recent clang packages
+RUN echo "deb http://deb.debian.org/debian buster-backports main" | tee /etc/apt/sources.list.d/buster-backports.list
+
+# Install clang-format
+RUN apt-get update && apt-get install -y clang-format-8
+ENV CLANG_FORMAT=clang-format-8
+
 ADD clang_format_all_the_things.sh /
 
 # When running locally, we'll be impersonating the current user, so we need

tools/dockerfile/test/sanity/Dockerfile

@@ -85,8 +85,8 @@ RUN python3 -m pip install simplejson mako virtualenv==16.7.9 lxml
 RUN echo "deb http://deb.debian.org/debian buster-backports main" | tee /etc/apt/sources.list.d/buster-backports.list
 
 # Install clang, clang-format, and clang-tidy
-RUN apt-get update && apt-get install -y clang clang-format-7 clang-tidy-8 jq
+RUN apt-get update && apt-get install -y clang clang-format-8 clang-tidy-8 jq
-ENV CLANG_FORMAT=clang-format-7
+ENV CLANG_FORMAT=clang-format-8
 ENV CLANG_TIDY=clang-tidy-8