Pre-checkout for windows

Kill all running processes in BUILDKITE_BUILD_PATH and force unlock git
folder.

containers/agent-windows-buildkite/Dockerfile

@@ -7,5 +7,4 @@ FROM gcr.io/llvm-premerge-checks/agent-windows-vs2019:${agent_windows_version}
 RUN choco install -y handle --checksum 524E61547C8E26608CDA1B11B6E9471616CCCC48530F6E7EC9131EABF839357E
 COPY start_agent.ps1 C:\scripts\
 COPY pre-checkout.bat c:\buildkite-agent\hooks\
-COPY unlock_path.ps1 c:\scripts
 CMD "powershell C:\scripts\start_agent.ps1"

containers/agent-windows-buildkite/pre-checkout.bat

@@ -1,2 +1,5 @@
-handle -nobanner %BUILDKITE_BUILD_CHECKOUT_PATH%
-powershell c:\scripts\unlock_path.ps1 %BUILDKITE_BUILD_CHECKOUT_PATH%
+echo "pre-checkout: update scripts"
+cd c:\llvm-premerge-checks
+git pull
+git rev-parse HEAD
+powershell c:\llvm-premerge-checks\scripts\windows\pre-checkout.ps1

containers/agent-windows-buildkite/start_agent.ps1

@@ -1,7 +1,7 @@
 c:\credentials\buildkite-env.ps1
+git clone https://github.com/google/llvm-premerge-checks.git c:\llvm-premerge-checks
 # Install Buildkite agent.
 iex ((New-Object System.Net.WebClient).DownloadString('https://raw.githubusercontent.com/buildkite/agent/master/install.ps1'))
-
 $env:SCCACHE_DIR="C:\ws\sccache"
 $env:SCCACHE_IDLE_TIMEOUT="0"
 Remove-Item -Recurse -Force -ErrorAction Ignore $env:SCCACHE_DIR

containers/build_run.ps1

@@ -32,10 +32,13 @@ If ($LastExitCode -ne 0) {
     exit
 }
 
+$DIGEST=$(docker image inspect --format "{{range .RepoDigests}}{{.}}{{end}}" $IMAGE_NAME) -replace ".*@sha256:(.{6})(.*)$","`$1"
 # mount a persistent workspace for experiments
 docker run -it `
     -v C:/ws:C:/ws `
     -v C:/credentials:C:/credentials `
+    -e BUILDKITE_BUILD_PATH=C:\ws `
+    -e IMAGE_DIGEST=${DIGEST} `
     -e PARENT_HOSTNAME=$env:computername `
     $IMAGE_NAME $CMD
 If ($LastExitCode -ne 0) {

scripts/steps.py

@@ -110,7 +110,7 @@ def generic_windows(projects: str) -> List:
         ],
         'artifact_paths': ['artifacts/**/*', '*_result.json', 'build/test-results.xml'],
         'agents': win_agents,
-        'timeout_in_minutes': 120,
+        'timeout_in_minutes': 150,
         'retry': {'automatic': [
             {'exit_status': -1, 'limit': 2},  # Agent lost
             {'exit_status': 255, 'limit': 2},  # Forced agent shutdown

scripts/windows/pre-checkout.ps1

@@ -0,0 +1,26 @@
+# 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.
+
+echo "BUILDKITE_BUILD_CHECKOUT_PATH: $env:BUILDKITE_BUILD_CHECKOUT_PATH"
+echo "unlocking git"
+taskkill /F /IM git.exe
+rm -Force "$env:BUILDKITE_BUILD_CHECKOUT_PATH/.git/index.lock"
+echo "BUILDKITE_BUILD_PATH: $env:BUILDKITE_BUILD_PATH"
+echo 'running processes (before)'
+Get-Process | Where-Object {$_.Path -like "$env:BUILDKITE_BUILD_PATH*"} | Select-Object -ExpandProperty Path
+echo "unlocking $env:BUILDKITE_BUILD_PATH"
+handle -nobanner $env:BUILDKITE_BUILD_CHECKOUT_PATH
+c:\llvm-premerge-checks\scripts\windows\unlock_path.ps1 $env:BUILDKITE_BUILD_CHECKOUT_PATH
+echo 'running processes (after)'
+Get-Process | Where-Object {$_.Path -like "$env:BUILDKITE_BUILD_PATH*"} | Select-Object -ExpandProperty Path

scripts/windows/start_container.ps1

@@ -0,0 +1,53 @@
+# 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.
+
+# Pull and start the Docker container for a Windows agent.
+# To setup a Windows agent see docs/playbooks.md
+
+param(
+    [string]$version = "stable",
+    [switch]$testing = $false,
+    [string]$workdir = "c:\ws"
+)
+
+$NAME="agent-windows-buildkite"
+$IMAGE="gcr.io/llvm-premerge-checks/${NAME}:${version}"
+
+Write-Output "Authenticating docker..."
+Write-Output "y`n" | gcloud auth configure-docker
+
+Write-Output "Pulling new image '${IMAGE}'..."
+docker pull ${IMAGE}
+$DIGEST=$(docker image inspect --format "{{range .RepoDigests}}{{.}}{{end}}" $IMAGE) -replace ".*@sha256:(.{6})(.*)$","`$1"
+Write-Output "Image digest ${DIGEST}"
+Write-Output "Stopping old container..."
+docker stop ${NAME}
+docker rm ${NAME}
+Write-Output "Starting container..."
+if (${testing}) {
+    docker run -it `
+    -v ${workdir}:C:\ws `
+    -v C:\credentials:C:\credentials `
+    -e BUILDKITE_BUILD_PATH=C:\ws `
+    -e IMAGE_DIGEST=${DIGEST} `
+    ${IMAGE} powershell
+} else {
+    docker run -d `
+    -v ${workdir}:C:\ws `
+    -v C:\credentials:C:\credentials `
+    -e BUILDKITE_BUILD_PATH=C:\ws `
+    -e IMAGE_DIGEST=${DIGEST} `
+    --name ${NAME} `
+    ${IMAGE}
+}

scripts/windows/unlock_path.ps1

@@ -1,12 +1,25 @@
+# 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.
+
 # Based ob https://dandraka.com/2019/08/13/find-and-kill-processes-that-lock-a-file-or-directory/
 $path = $args[0]
 $handleOutput = & handle -a $path
-
+Write-Host "Unlocking path" $path
 if ($handleOutput -match "no matching handles found") {
     Write-Host "Nothing to kill, exiting"
     exit
 }
-
 $pidList = New-Object System.Collections.ArrayList
 $lines = $handleOutput -split "`n"
 foreach($line in $lines) {

scripts/windows_agent_start_buildkite.ps1

@@ -12,42 +12,16 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Pull and start the Docker container for a Windows agent.
-# To setup a Windows agent see docs/playbooks.md
+# Invoked at startup of windows machine. This indirection allows to simply
+# restart a machine and it will pick up all script changes and will use the
+# latest stable image.
 
 param(
-    [string]$version = "latest",
+    [string]$version = "stable",
     [switch]$testing = $false,
     [string]$workdir = "c:\ws"
 )
 
-$NAME="agent-windows-buildkite"
-$IMAGE="gcr.io/llvm-premerge-checks/${NAME}:${version}"
-
-Write-Output "Authenticating docker..."
-Write-Output "y`n" | gcloud auth configure-docker
-
-Write-Output "Pulling new image '${IMAGE}'..."
-docker pull ${IMAGE}
-$DIGEST=$(docker image inspect --format "{{range .RepoDigests}}{{.}}{{end}}" $IMAGE) -replace ".*@sha256:(.{6})(.*)$","`$1"
-Write-Output "Image digest ${DIGEST}"
-Write-Output "Stopping old container..."
-docker stop ${NAME}
-docker rm ${NAME}
-Write-Output "Starting container..."
-if (${testing}) {
-    docker run -it `
-    -v ${workdir}:C:\ws `
-    -v C:\credentials:C:\credentials `
-    -e BUILDKITE_BUILD_PATH=C:\ws `
-    -e IMAGE_DIGEST=${DIGEST} `
-    ${IMAGE} powershell
-} else {
-    docker run -d `
-    -v ${workdir}:C:\ws `
-    -v C:\credentials:C:\credentials `
-    -e BUILDKITE_BUILD_PATH=C:\ws `
-    -e IMAGE_DIGEST=${DIGEST} `
-    --name ${NAME} `
-    ${IMAGE}
-}
+cd c:\llvm-premerge-checks
+git pull
+c:\llvm-premerge-checks\scripts\windows\start_container.ps1 -version $version -testing $testing -workdir $workdir