From 7126d61ca2c988a7d25e1212c810e1796a9e9108 Mon Sep 17 00:00:00 2001
From: Andreas Herrmann <andreas.herrmann@tweag.io>
Date: Fri, 12 Jun 2020 11:31:29 +0200
Subject: [PATCH] Increment Windows cache URL

We've seen a series of failures of the form
```
ERROR: D:/a/1/s/daml-assistant/integration-tests/BUILD.bazel:162:1: output 'daml-assistant/integration-tests/create-daml-app-tests.exe' was not created
ERROR: D:/a/1/s/daml-assistant/integration-tests/BUILD.bazel:162:1: not all outputs were created or valid
```
across multiple machines. We suspect cache poisoning as the cause. This
increments the cache URL to effectively clear the cache.

changelog_begin
changelog_end
---
 build.ps1                                         | 2 ++
 ci/configure-bazel.sh                             | 2 +-
 compatibility/build-release-artifacts-windows.ps1 | 1 +
 compatibility/test-windows.ps1                    | 1 +
 4 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/build.ps1 b/build.ps1
index 062a4e22e090..c815dbc9dd1d 100644
--- a/build.ps1
+++ b/build.ps1
@@ -49,6 +49,8 @@ function bazel() {
 # which is a workaround for this problem.
 bazel shutdown
 
+bazel clean --expunge
+
 # Prefetch nodejs_dev_env to avoid permission denied errors on external/nodejs_dev_env/nodejs_dev_env/node.exe
 # It isn’t clear where exactly those errors are coming from.
 bazel fetch @nodejs_dev_env//...
diff --git a/ci/configure-bazel.sh b/ci/configure-bazel.sh
index 779145d13e54..77fb6b2e7f24 100755
--- a/ci/configure-bazel.sh
+++ b/ci/configure-bazel.sh
@@ -74,7 +74,7 @@ if is_windows; then
   SUFFIX="${SUFFIX:0:3}"
   echo "Platform suffix: $SUFFIX"
   # We include an extra version at the end that we can bump manually.
-  CACHE_SUFFIX="$SUFFIX-v2"
+  CACHE_SUFFIX="$SUFFIX-v3"
   CACHE_URL="$CACHE_URL/$CACHE_SUFFIX"
   echo "build:windows-ci --remote_http_cache=https://bazel-cache.da-ext.net/$CACHE_SUFFIX" >> .bazelrc.local
 fi
diff --git a/compatibility/build-release-artifacts-windows.ps1 b/compatibility/build-release-artifacts-windows.ps1
index ed0facae8fce..b3045c9fa1d0 100644
--- a/compatibility/build-release-artifacts-windows.ps1
+++ b/compatibility/build-release-artifacts-windows.ps1
@@ -37,6 +37,7 @@ function bazel() {
 
 
 bazel shutdown
+bazel clean --expunge
 bazel fetch @nodejs_dev_env//...
 bazel build `
   `-`-experimental_execution_log_file ${ARTIFACT_DIRS}/build_execution_windows.log `
diff --git a/compatibility/test-windows.ps1 b/compatibility/test-windows.ps1
index e7b274d6a038..adcaca6ce6d3 100644
--- a/compatibility/test-windows.ps1
+++ b/compatibility/test-windows.ps1
@@ -45,6 +45,7 @@ cd compatibility
 cp ../.bazelrc .bazelrc
 
 bazel shutdown
+bazel clean --expunge
 bazel fetch @nodejs_dev_env//...
 bazel build //...
 bazel shutdown