net-core-multi-stage-dockerfile-with-test-and-code-coverage-in-azure-pipelines/

[giscus[bot]]

net-core-multi-stage-dockerfile-with-test-and-code-coverage-in-azure-pipelines/

All things DevOps and GitHub. Musings about DevOps tooling, culture and philosophy.

https://colinsalmcorner.com/net-core-multi-stage-dockerfile-with-test-and-code-coverage-in-azure-pipelines/

[divekarvinit]

Hello Colin, thanks for the detailed blog. I had a issue that after the report was published, when I went to individual files, it showed error as: File '/app/x_y_z.cs' does not exist (any more). I found out that it was due to WORKDIR in docker was set as /app. With that, the source code is copied into /app directory. Now when report generator is run, the source has the path starting with /app.

Now, in azure pipeline, when the line docker cp testcontainer:/testresults ./testresults is run, it copies the generated report to the following path, /home/vsts/work/1/s/TestResults. The report tries to find files starting at /app but cannot find. Hence we see the error.

To get around I had to update my Dockerfile's build stage's WORKDIR as /home/vsts/work/1/s and update your script to copy source code in azure host as:

- script: |
    export id=$(docker images --filter "label=test=true" -q | head -1)
    docker create --name testcontainer $id
    docker cp testcontainer:/testresults ./testresults
    docker cp testcontainer:$(System.DefaultWorkingDirectory) $(System.DefaultWorkingDirectory)
    docker rm testcontainer
  displayName: 'get test results'

My Docker file looks like:

FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /home/vsts/work/1/s
COPY . .

# Ommitted for convinience.

With this change, at both places (in docker and azure host), the source code lies at /home/vsts/work/1/s.

I feel that this work-around solution could be improved. Would you have any idea?

[Gladskih]

But if a test failed the image (and layer) is not built and the report is lost.