Exception Missing default script thrown when no task is specified about invoke-build

[nightroman]

Take a look at the Invoke-Build syntax (help Invoke-Build):

Invoke-Build.ps1 [[-Task] <String[]>] [[-File] <String>] ...

Note that Task is the first positional parameter and File is the second.

.\packages\Invoke-Build\tools\Invoke-Build .\.build\Build.ps1

The above command specifies the task .\.build\Build.ps1 (unusual but possible name) and no build script. As a result, Invoke-Build looks for the default script in the current location and then in its parent directories. It is not found, hence the error.

You should either specify the parameter name -File:

.\packages\Invoke-Build\tools\Invoke-Build -File .\.build\Build.ps1

or specify the default task explicitly as the first positional parameter, as the syntax requires:

.\packages\Invoke-Build\tools\Invoke-Build . .\.build\Build.ps1

[nightroman]

By the way, your script Build.ps1 will not be recognized as the default even if it is in the current directory. By the convention it should be either named .build.ps1 or something.build.ps1. In the latter case it also should be the only like *.build.ps1 in its directory in order to be recognized as the default for this directory.

If you are planning to use it as the default script in some commands then it should be renamed. It is also convenient to put it to the root directory of a project. In this case Invoke-Build will find it as the default script when it is invoked in any child directory of the project (assuming there are no other build scripts there).

And if you put the default build script (named properly) to the root of your project then you can call its default task simply as

.\packages\Invoke-Build\tools\Invoke-Build

[nightroman]

If there are no more questions or related issues please close the issue.

[DaveSenn]

Sorry had no time to check you answer until now.
Thank you very much for your answer.
Specifying the name of the parameter works perfectly.