sccache on linux + deployment sizes

containers/buildkite-linux/Dockerfile

@@ -78,7 +78,7 @@ RUN echo 'install buildkite' ;\
 COPY *.sh /usr/local/bin/
 RUN chmod og+rx /usr/local/bin/*.sh
 COPY --chown=buildkite-agent:buildkite-agent pre-checkout /etc/buildkite-agent/hooks
-COPY --chown=buildkite-agent:buildkite-agent post-checkout /etc/buildkite-agent/hooks
+# COPY --chown=buildkite-agent:buildkite-agent post-checkout /etc/buildkite-agent/hooks
 
 # buildkite working directory
 VOLUME /var/lib/buildkite-agent

containers/buildkite-linux/entrypoint.sh

@@ -26,6 +26,14 @@ export CCACHE_MAXSIZE=20G
 mkdir -p "${CCACHE_DIR}"
 chown -R ${USER}:${USER} "${CCACHE_DIR}"
 
+export SCCACHE_DIR="$BUILDKITE_BUILD_PATH/sccache"
+export SCCACHE_IDLE_TIMEOUT="0"
+rm -rf "$SCCACHE_DIR"
+mkdir -p "${SCCACHE_DIR}"
+chown -R ${USER}:${USER} "${SCCACHE_DIR}"
+chmod oug+rw "${SCCACHE_DIR}"
+gosu "$USER" bash -c 'env; whoami; SCCACHE_DIR="${SCCACHE_DIR}" SCCACHE_IDLE_TIMEOUT=0 SCCACHE_CACHE_SIZE=20G sccache --start-server'
+
 # /mnt/ssh should contain known_hosts, id_rsa and id_rsa.pub .
 mkdir -p /var/lib/buildkite-agent/.ssh
 if [ -d /mnt/ssh ]; then
@@ -36,4 +44,5 @@ if [ -d /mnt/ssh ]; then
 else
   echo "/mnt/ssh is not mounted"
 fi
+# Run with tini to correctly pass exit codes.
 exec /usr/bin/tini -g -- $@

containers/buildkite-linux/post-checkout

@@ -1,26 +0,0 @@
-# Copyright 2021 Google LLC
-#
-# Licensed under the the Apache License v2.0 with LLVM Exceptions (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     https://llvm.org/LICENSE.txt
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# The `post-checkout` hook runs after checkout.
-
-set -eu
-
-# Run prune as git will start to complain "warning: There are too many unreachable loose objects; run 'git prune' to remove them.".
-# That happens as we routinely drop old branches.
-git prune
-if [ -f ".git/gc.log" ]; then
-  echo ".git/gc.log exist"
-  cat ./.git/gc.log
-  rm -f ./.git/gc.log
-fi

containers/buildkite-linux/pre-checkout

@@ -16,8 +16,37 @@
 # The `pre-checkout` hook will run just before your pipelines source code is
 # checked out from your SCM provider
 
-set -e
+set -eu
+set -o pipefail
 
 # Convert https://github.com/llvm-premerge-tests/llvm-project.git -> llvm-project
 # to use the same directory for fork and origin.
 BUILDKITE_BUILD_CHECKOUT_PATH="${BUILDKITE_BUILD_PATH}/$(echo $BUILDKITE_REPO | sed -E "s#.*/([^/]*)#\1#" | sed "s/.git$//")"
+gc_counter="$BUILDKITE_BUILD_PATH/git_gc_counter"
+echo "BUILDKITE_REPO: $BUILDKITE_REPO"
+if [ -d "$BUILDKITE_BUILD_CHECKOUT_PATH" ]; then
+    cd "$BUILDKITE_BUILD_CHECKOUT_PATH" || exit
+    remoteUrl=$(git remote get-url origin)
+    echo "current remote URL: $remoteUrl"
+    if [ "$remoteUrl" != "$BUILDKITE_REPO" ]; then
+        echo "Remote URL does not match. Deleting and recreating the directory."
+        cd /c/
+        rm -rf "$BUILDKITE_BUILD_CHECKOUT_PATH"
+        rm -rf "$gc_counter"
+    else
+        # Run git gc from time to time to prevent repo from growing.
+        echo -n "x" >> "$gc_counter"
+        echo "GC counter $(wc -c < "$gc_counter")/20"
+        if [ "$(wc -c < "$gc_counter")" -gt 20 ]; then
+            echo "Running 'git gc'..."
+            git gc
+            git prune
+            if [ -f ".git/gc.log" ]; then
+              echo ".git/gc.log exist"
+              cat ./.git/gc.log
+              rm -f ./.git/gc.log
+            fi
+            rm -rf "$gc_counter"
+        fi
+    fi
+fi

kubernetes/buildkite/windows.yaml

@@ -17,7 +17,7 @@ kind: Deployment
 metadata:
   name: windows-buildkite
 spec:
-  replicas: 8
+  replicas: 6
   strategy:
     type: Recreate
   selector: