Is it possible to reuse an Image?

[jorgefm]

Hi,

In my project I have the Dockerfile to build the image to use to run some integration tests. Something like:

`
public sealed class MyIntegrationTest : IAsyncLifetime
{
private readonly IFutureDockerImage _image = null;

private readonly string _imageName = "integration_test_image:latest";

public MyIntegrationTest()
{
    _image = new ImageFromDockerfileBuilder()
        .WithDockerfileDirectory(CommonDirectoryPath.GetSolutionDirectory(), Directory.GetCurrentDirectory())
        .WithDockerfile("Dockerfile")
        .WithName(_imageName)
        .WithCleanUp(false)
        .Build();
}

public async Task InitializeAsync()
{
    await _image.CreateAsync()
        .ConfigureAwait(false);
}

public Task DisposeAsync()
{
    return Task.CompletedTask;
}

[Fact]
...

`

Then every time I run a test with the given image is created and I found in my system a new integration_test_image:latest and the old image renamed to :

Is there some way to avoid creating the new image if there is an image already present with the same name and version?

Thanks!

[HofmeisterAn]

You can configure the behavior with the following API:

WithImageBuildPolicy(Func<ImageInspectResponse, bool>)

By default, the builder always builds the image. You can either use the existing pull policy predicate:

WithImageBuildPolicy(PullPolicy.Missing)

or use your own:

WithImageBuildPolicy(cachedImage => cachedImage == null)

I noticed that this API is not mentioned in the docs. I will update it later.

[jorgefm]

Yes, that's make the trick...

Thanks!