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|
//
// BuilderManagerTests.cs
//
// Author:
// Lluis Sanchez <llsan@microsoft.com>
//
// Copyright (c) 2017 Microsoft
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.IO;
using System.Threading.Tasks;
using MonoDevelop.Core;
using NUnit.Framework;
using UnitTests;
using System.Linq;
using MonoDevelop.Projects.MSBuild;
namespace MonoDevelop.Projects
{
public class BuilderManagerTests: TestBase
{
// The solution used in this test fixture uses a special task that can
// pause the build until signaled to continue. The task creates a file
// named 'sync-event' when executed, and pauses execution until a file
// named 'continue-event' is created next to it. This is used to pause
// a project in the middle of a build, so that concurrency can be tested.
// The SyncBuildProject project uses this task in a post-build target,
// so the project build will be paused until signaled to conitnue.
// The FileSync target can also uses that task.
[Test]
public async Task ConcurrentLongOperations ()
{
// When a long operation is running and a new one is requested, a new builder is created
await RemoteBuildEngineManager.RecycleAllBuilders ();
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
FilePath solFile = Util.GetSampleProject ("builder-manager-tests", "builder-manager-tests.sln");
using (var sol = (Solution)await Services.ProjectService.ReadWorkspaceItem (Util.GetMonitor (), solFile)) {
var project1 = sol.Items.FirstOrDefault (p => p.Name == "SyncBuildProject");
var project2 = sol.Items.FirstOrDefault (p => p.Name == "App");
InitBuildSyncEvent (project1);
// Start the build
var build1 = project1.Build (Util.GetMonitor (), sol.Configurations [0].Selector);
// Wait for the build to reach the sync task
await WaitForBuildSyncEvent (project1);
// The build is now in progess. Start a new build
var build2 = project2.Build (Util.GetMonitor (), sol.Configurations [0].Selector);
if (await Task.WhenAny (build2, Task.Delay (5000)) != build2)
Assert.Fail ("Build did not start");
// The second build should finish before the first one
SignalBuildToContinue (project1);
if (await Task.WhenAny (build1, Task.Delay (5000)) != build1)
Assert.Fail ("Build did not end in time");
Assert.AreEqual (0, build1.Result.ErrorCount);
Assert.AreEqual (0, build2.Result.ErrorCount);
}
}
[Test]
public async Task ConcurrentLongAndShortOperations ()
{
// Tests that when a short operation is started while a long operation is in progress,
// a new builder is created to execute the short operation
await RemoteBuildEngineManager.RecycleAllBuilders ();
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
FilePath solFile = Util.GetSampleProject ("builder-manager-tests", "builder-manager-tests.sln");
using (var sol = (Solution)await Services.ProjectService.ReadWorkspaceItem (Util.GetMonitor (), solFile)) {
var project1 = sol.Items.FirstOrDefault (p => p.Name == "SyncBuildProject");
var project2 = (Project)sol.Items.FirstOrDefault (p => p.Name == "App");
InitBuildSyncEvent (project1);
// Start the build
var build1 = project1.Build (Util.GetMonitor (), sol.Configurations [0].Selector);
// Wait for the build to reach the sync task
await WaitForBuildSyncEvent (project1);
// The build is now in progess. Start a short operation.
var context = new TargetEvaluationContext {
BuilderQueue = BuilderQueue.ShortOperations
};
var build2 = project2.RunTarget (Util.GetMonitor (), "QuickTarget", sol.Configurations [0].Selector, context);
if (await Task.WhenAny (build2, Task.Delay (5000)) != build2)
Assert.Fail ("Build did not start");
SignalBuildToContinue (project1);
if (await Task.WhenAny (build1, Task.Delay (5000)) != build1)
Assert.Fail ("Build did not end in time");
Assert.AreEqual (0, build1.Result.ErrorCount);
Assert.NotNull (build2.Result);
}
}
[Test]
public async Task ShortOperationsInSingleBuilder ()
{
// Tests that targets using BuilderQueue.ShortOperations share the same builder
// and don't spawn a new builder when one of them is being executed and another
// one starts executing.
await RemoteBuildEngineManager.RecycleAllBuilders ();
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
FilePath solFile = Util.GetSampleProject ("builder-manager-tests", "builder-manager-tests.sln");
using (var sol = (Solution)await Services.ProjectService.ReadWorkspaceItem (Util.GetMonitor (), solFile)) {
var project1 = (Project)sol.Items.FirstOrDefault (p => p.Name == "SyncBuildProject");
var project2 = (Project)sol.Items.FirstOrDefault (p => p.Name == "App");
InitBuildSyncEvent (project1);
// Start the first target. The FileSync target will pause until signaled to continue.
// Select the ShortOperations build queue.
var context = new TargetEvaluationContext {
BuilderQueue = BuilderQueue.ShortOperations
};
var build1 = project1.RunTarget (Util.GetMonitor (), "FileSync", sol.Configurations [0].Selector, context);
// Wait for the build to reach the sync task
await WaitForBuildSyncEvent (project1);
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
// The build is now in progess. Run a new target.
context = new TargetEvaluationContext {
BuilderQueue = BuilderQueue.ShortOperations
};
var build2 = project2.RunTarget (Util.GetMonitor (), "QuickTarget", sol.Configurations [0].Selector, context);
// Wait a bit. This should be enough to ensure the build has started.
await Task.Delay (1000);
// The RunTarget request should be queued, not new builder should be spawned
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
// Continue building the first project
SignalBuildToContinue (project1);
// The first build should end now
if (await Task.WhenAny (build1, Task.Delay (5000)) != build1)
Assert.Fail ("Build did not end in time");
// And now the second build should end
if (await Task.WhenAny (build2, Task.Delay (5000)) != build2)
Assert.Fail ("Build did not end in time");
Assert.NotNull (build1.Result);
Assert.NotNull (build2.Result);
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
}
}
[Test]
public async Task ConcurrentShortAndLongOperations ()
{
// If a builder is running a short operation and a long operation is started,
// that long operation will wait for the sort operation to finish
// and will use the same builder, instead of starting a new one.
await RemoteBuildEngineManager.RecycleAllBuilders ();
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
FilePath solFile = Util.GetSampleProject ("builder-manager-tests", "builder-manager-tests.sln");
using (var sol = (Solution)await Services.ProjectService.ReadWorkspaceItem (Util.GetMonitor (), solFile)) {
var project1 = (Project)sol.Items.FirstOrDefault (p => p.Name == "SyncBuildProject");
var project2 = (Project)sol.Items.FirstOrDefault (p => p.Name == "App");
InitBuildSyncEvent (project1);
// Start the first target. The FileSync target will pause until signaled to continue.
// Select the ShortOperations build queue.
var context = new TargetEvaluationContext {
BuilderQueue = BuilderQueue.ShortOperations
};
var build1 = project1.RunTarget (Util.GetMonitor (), "FileSync", sol.Configurations [0].Selector, context);
// Wait for the build to reach the sync task
await WaitForBuildSyncEvent (project1);
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
// The build is now in progess. Run a new target.
context = new TargetEvaluationContext {
BuilderQueue = BuilderQueue.LongOperations
};
var build2 = project2.RunTarget (Util.GetMonitor (), "QuickTarget", sol.Configurations [0].Selector, context);
// Wait a bit. This should be enough to ensure the build has started.
await Task.Delay (1000);
// The RunTarget request should be queued, not new builder should be spawned
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
// Continue building the first project
SignalBuildToContinue (project1);
// The first build should end now
if (await Task.WhenAny (build1, Task.Delay (5000)) != build1)
Assert.Fail ("Build did not end in time");
// And now the second build should end
if (await Task.WhenAny (build2, Task.Delay (5000)) != build2)
Assert.Fail ("Build did not end in time");
Assert.NotNull (build1.Result);
Assert.NotNull (build2.Result);
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
}
}
[Test]
public async Task ConcurrentShortAndBuildOperations ()
{
// If a builder is running a short operation and a build is started,
// the build operation will wait for the sort operation to finish
// and will use the same builder, instead of starting a new one.
// Also, the build session should not start until the short operation
// is finished.
await RemoteBuildEngineManager.RecycleAllBuilders ();
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
FilePath solFile = Util.GetSampleProject ("builder-manager-tests", "builder-manager-tests.sln");
using (var sol = (Solution)await Services.ProjectService.ReadWorkspaceItem (Util.GetMonitor (), solFile)) {
var project1 = (Project)sol.Items.FirstOrDefault (p => p.Name == "SyncBuildProject");
var project2 = (Project)sol.Items.FirstOrDefault (p => p.Name == "App");
InitBuildSyncEvent (project1);
// Start the first target. The FileSync target will pause until signaled to continue.
// Select the ShortOperations build queue.
var context = new TargetEvaluationContext {
BuilderQueue = BuilderQueue.ShortOperations
};
var build1 = project1.RunTarget (Util.GetMonitor (), "FileSync", sol.Configurations [0].Selector, context);
// Wait for the build to reach the sync task
await WaitForBuildSyncEvent (project1);
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
// The build is now in progess. Run a new target.
var build2 = project2.Build (Util.GetMonitor (), sol.Configurations [0].Selector);
// Wait a bit. This should be enough to ensure the build has started.
await Task.Delay (1000);
// The RunTarget request should be queued, no new builder should be spawned
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
// Continue building the first project
SignalBuildToContinue (project1);
// The first build should end now
if (await Task.WhenAny (build1, Task.Delay (5000)) != build1)
Assert.Fail ("Build did not end in time");
// And now the second build should end
if (await Task.WhenAny (build2, Task.Delay (5000)) != build2)
Assert.Fail ("Build did not end in time");
Assert.NotNull (build1.Result);
Assert.AreEqual (0, build2.Result.ErrorCount);
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
}
}
[Test]
public async Task DisposingSolutionDisposesBuilder ()
{
// When a solution is disposed, all builders bound to the solution should be shut down
await RemoteBuildEngineManager.RecycleAllBuilders ();
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
FilePath solFile = Util.GetSampleProject ("builder-manager-tests", "builder-manager-tests.sln");
FilePath projectFile;
using (var sol = (Solution)await Services.ProjectService.ReadWorkspaceItem (Util.GetMonitor (), solFile)) {
var project = (DotNetProject)sol.Items.FirstOrDefault (p => p.Name == "App");
projectFile = project.FileName;
await project.GetReferencedAssemblies (sol.Configurations [0].Selector);
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (1, await RemoteBuildEngineManager.CountActiveBuildersForProject (project.FileName));
}
Assert.AreEqual (0, await RemoteBuildEngineManager.CountActiveBuildersForProject (projectFile));
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
}
[Test]
public async Task DisposingProjectDisposesProjectBuilder ()
{
// When a project is disposed, all project builders should be shut down
await RemoteBuildEngineManager.RecycleAllBuilders ();
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
FilePath solFile = Util.GetSampleProject ("builder-manager-tests", "builder-manager-tests.sln");
FilePath projectFile;
using (var sol = (Solution)await Services.ProjectService.ReadWorkspaceItem (Util.GetMonitor (), solFile)) {
var project = (DotNetProject)sol.Items.FirstOrDefault (p => p.Name == "App");
projectFile = project.FileName;
await project.GetReferencedAssemblies (sol.Configurations [0].Selector);
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (1, await RemoteBuildEngineManager.CountActiveBuildersForProject (project.FileName));
sol.RootFolder.Items.Remove (project);
project.Dispose ();
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (1, RemoteBuildEngineManager.EnginesCount);
Assert.AreEqual (0, await RemoteBuildEngineManager.CountActiveBuildersForProject (project.FileName));
}
Assert.AreEqual (0, await RemoteBuildEngineManager.CountActiveBuildersForProject (projectFile));
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (0, RemoteBuildEngineManager.EnginesCount);
}
[Test]
public async Task ExtraBuilderAutoShutdown ()
{
// When an extra builder is created, it should be shut down when it is
// not used anymore, after a delay
var currentDelay = RemoteBuildEngineManager.EngineDisposalDelay;
try {
RemoteBuildEngineManager.EngineDisposalDelay = 400;
await RemoteBuildEngineManager.RecycleAllBuilders ();
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
FilePath solFile = Util.GetSampleProject ("builder-manager-tests", "builder-manager-tests.sln");
using (var sol = (Solution)await Services.ProjectService.ReadWorkspaceItem (Util.GetMonitor (), solFile)) {
var project1 = sol.Items.FirstOrDefault (p => p.Name == "SyncBuildProject");
var project2 = sol.Items.FirstOrDefault (p => p.Name == "App");
InitBuildSyncEvent (project1);
// Start the build
var build1 = project1.Build (Util.GetMonitor (), sol.Configurations [0].Selector);
// Wait for the build to reach the sync task
await WaitForBuildSyncEvent (project1);
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (0, await RemoteBuildEngineManager.CountActiveBuildersForProject (project2.FileName));
// The build is now in progess. Start a new build
var build2 = project2.Build (Util.GetMonitor (), sol.Configurations [0].Selector);
if (await Task.WhenAny (build2, Task.Delay (5000)) != build2)
Assert.Fail ("Build did not start");
Assert.AreEqual (2, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (1, await RemoteBuildEngineManager.CountActiveBuildersForProject (project2.FileName));
// Build engine disposal delay is set to 400ms, so it should be gone after waiting the following wait.
await Task.Delay (500);
// The second builder should now be gone
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (1, RemoteBuildEngineManager.EnginesCount);
Assert.AreEqual (0, await RemoteBuildEngineManager.CountActiveBuildersForProject (project2.FileName));
SignalBuildToContinue (project1);
if (await Task.WhenAny (build1, Task.Delay (5000)) != build1)
Assert.Fail ("Build did not end in time");
}
} finally {
RemoteBuildEngineManager.EngineDisposalDelay = currentDelay;
}
}
[Test]
public async Task AtLeastOneBuilderPersolution ()
{
// There should always be at least one builder running per solution,
// until the solution is explicitly disposed
var currentDelay = RemoteBuildEngineManager.EngineDisposalDelay;
try {
RemoteBuildEngineManager.EngineDisposalDelay = 400;
await RemoteBuildEngineManager.RecycleAllBuilders ();
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
FilePath solFile = Util.GetSampleProject ("builder-manager-tests", "builder-manager-tests.sln");
using (var sol = (Solution)await Services.ProjectService.ReadWorkspaceItem (Util.GetMonitor (), solFile)) {
var project1 = sol.Items.FirstOrDefault (p => p.Name == "SyncBuildProject");
var project2 = sol.Items.FirstOrDefault (p => p.Name == "App");
InitBuildSyncEvent (project1);
// Start the build
var build1 = project1.Build (Util.GetMonitor (), sol.Configurations [0].Selector);
// Wait for the build to reach the sync task
await WaitForBuildSyncEvent (project1);
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (0, await RemoteBuildEngineManager.CountActiveBuildersForProject (project2.FileName));
// The build is now in progess. Start a new build
var build2 = project2.Build (Util.GetMonitor (), sol.Configurations [0].Selector);
if (await Task.WhenAny (build2, Task.Delay (5000)) != build2)
Assert.Fail ("Build did not start");
Assert.AreEqual (2, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (2, RemoteBuildEngineManager.EnginesCount);
Assert.AreEqual (1, await RemoteBuildEngineManager.CountActiveBuildersForProject (project1.FileName));
Assert.AreEqual (1, await RemoteBuildEngineManager.CountActiveBuildersForProject (project2.FileName));
SignalBuildToContinue (project1);
if (await Task.WhenAny (build1, Task.Delay (5000)) != build1)
Assert.Fail ("Build did not end in time");
// Build engine disposal delay is set to 400ms, so unused
// builders should go away after a 500ms wait.
await Task.Delay (500);
// There should be at least one builder left
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (1, RemoteBuildEngineManager.EnginesCount);
}
} finally {
RemoteBuildEngineManager.EngineDisposalDelay = currentDelay;
}
// All builders should be gone now
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (0, RemoteBuildEngineManager.EnginesCount);
}
[Test]
public async Task RecycleBuildersIsGraceful ()
{
// RecycleBuilders can be called in the middle of a build and that should not interrupt
// the build. Builders will be shut down when the build is finished.
var currentDelay = RemoteBuildEngineManager.EngineDisposalDelay;
try {
RemoteBuildEngineManager.EngineDisposalDelay = 400;
await RemoteBuildEngineManager.RecycleAllBuilders ();
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
FilePath solFile = Util.GetSampleProject ("builder-manager-tests", "builder-manager-tests.sln");
using (var sol = (Solution)await Services.ProjectService.ReadWorkspaceItem (Util.GetMonitor (), solFile)) {
var project1 = sol.Items.FirstOrDefault (p => p.Name == "SyncBuildProject");
var project2 = sol.Items.FirstOrDefault (p => p.Name == "App");
InitBuildSyncEvent (project1);
// Start the build
var build1 = project1.Build (Util.GetMonitor (), sol.Configurations [0].Selector);
// Wait for the build to reach the sync task
await WaitForBuildSyncEvent (project1);
Assert.AreEqual (1, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (0, await RemoteBuildEngineManager.CountActiveBuildersForProject (project2.FileName));
// The build is now in progess. Start a new build
var build2 = project2.Build (Util.GetMonitor (), sol.Configurations [0].Selector);
if (await Task.WhenAny (build2, Task.Delay (5000)) != build2)
Assert.Fail ("Build did not start");
// There should be one builder for each build
Assert.AreEqual (2, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (2, RemoteBuildEngineManager.EnginesCount);
// Ask for all active builders to be shut down
await RemoteBuildEngineManager.RecycleAllBuilders ();
// There is a build in progress, so there must still be one engine running
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (1, RemoteBuildEngineManager.EnginesCount);
SignalBuildToContinue (project1);
if (await Task.WhenAny (build1, Task.Delay (5000)) != build1)
Assert.Fail ("Build did not end in time");
Assert.AreEqual (0, build1.Result.ErrorCount);
Assert.AreEqual (0, build2.Result.ErrorCount);
// The builder that was running the build and was shutdown should be immediately stopped after build finishes
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
Assert.AreEqual (0, RemoteBuildEngineManager.EnginesCount);
}
} finally {
RemoteBuildEngineManager.EngineDisposalDelay = currentDelay;
}
}
[Test]
public async Task ParallelBuilds ()
{
// Check that the project system can start two builds in parallel.
await RemoteBuildEngineManager.RecycleAllBuilders ();
Assert.AreEqual (0, RemoteBuildEngineManager.ActiveEnginesCount);
var currentSetting = Runtime.Preferences.ParallelBuild.Value;
try {
Runtime.Preferences.ParallelBuild.Set (true);
FilePath solFile = Util.GetSampleProject ("builder-manager-tests", "builder-manager-tests.sln");
using (var sol = (Solution)await Services.ProjectService.ReadWorkspaceItem (Util.GetMonitor (), solFile)) {
// DepMain depends on both Dep1 and Dep2.
var demMain = sol.Items.FirstOrDefault (p => p.Name == "DepMain");
var dep1 = sol.Items.FirstOrDefault (p => p.Name == "Dep1");
var dep2 = sol.Items.FirstOrDefault (p => p.Name == "Dep2");
InitBuildSyncEvent (dep1);
InitBuildSyncEvent (dep2);
// Start the build
var build1 = demMain.Build (Util.GetMonitor (), sol.Configurations [0].Selector, true);
// Wait for sync signal from projects Dep1 and Dep2, which will mean that
// both projects started building in parallel
var syncAll = Task.WhenAll (WaitForBuildSyncEvent (dep1), WaitForBuildSyncEvent (dep2));
if (await Task.WhenAny (syncAll, Task.Delay (5000)) != syncAll)
Assert.Fail ("Not all builds were started");
// Finish the build
SignalBuildToContinue (dep1);
SignalBuildToContinue (dep2);
if (await Task.WhenAny (build1, Task.Delay (5000)) != build1)
Assert.Fail ("Build did not end in time");
Assert.AreEqual (0, build1.Result.ErrorCount);
}
} finally {
Runtime.Preferences.ParallelBuild.Set (currentSetting);
}
}
void InitBuildSyncEvent (SolutionItem p)
{
var file = p.FileName.ParentDirectory.Combine ("sync-event");
if (File.Exists (file))
File.Delete (file);
file = p.FileName.ParentDirectory.Combine ("continue-event");
if (File.Exists (file))
File.Delete (file);
}
async Task WaitForBuildSyncEvent (SolutionItem p)
{
var file = p.FileName.ParentDirectory.Combine ("sync-event");
while (!File.Exists (file)) {
await Task.Delay (50);
}
}
void SignalBuildToContinue (SolutionItem p)
{
var file = p.FileName.ParentDirectory.Combine ("continue-event");
File.WriteAllText (file, "");
}
}
}
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