how to call PowerShell script with a GithubActions workflow?

Question:

I’m calling .\build.ps1 and it seems to hang:

Do I need something special? In AzureDevOps this was working out of the box.

As agreed in the comments, the solution for this issue was to specify the shell to be run in your Action file. In your case you had to change from:

    - name: Build
      run: |
        .\build.ps1

- name: Build

run: |

.\build.ps1

to:

    - name: Build
      shell: pwsh
      run: |
        .\build.ps1

- name: Build

shell: pwsh

run: |

.\build.ps1

For more details about available values for shell param, refer to documentation.