How to use environment variables in expressions

[yosuke.takahashi]

Hello,

We would like to use environment variables in expressions.





GSA supports environment variables(%SOURCES% in the above example), but they are available only in the path of feature sources, not in expressions.

This is our workaround.



We create a csv file, which stores environment variables in it.



Add the csv to feature source.


Join a business collection to the csv collection. The join expression should always return true.



Use csv's path in the expression.


The link to the document works.

But I think this is not a good way. Are there any other workarounds?

Regards,
Yosuke

 

[Frank Pistorius]

Hi Yosuke,

Thanks for sharing, this is indeed a great trick.

It is actually possible to access environment variables directly from the expression language.
This can be done via Environment.Variable() and can be used as follows:

{
    # Get the project directory from the environment
    var projectDir = Environment.Variable("SEPROJECTDIR");
    
    # Get the Data subdirectory
    var myDataPath = Path.Combine(projectDir, "Data");
    
    # For demo, just return this value
    return myDataPath;
}

See Environment.Variable() for more information on this in the documentation.

Regards,

Frank

 

[markvanderhurk]

Hi Yosuke,

It looks like this is what you are looking for:


Using double quotes around the name of the variable (comparable to %variablename% in paths). You can use the built in variables as well as variables you have set yourselves (in your example SOURCES would become Environment.Variable("SOURCES") )

Does this solve your concern?

Best regards, Mark

// it looks like Frank was just a tiny bit earlier in providing an answer

 

[yosuke.takahashi]

Hi Frank and Mark,

Oh, I didn't know Environment.Variable()...
It works well! Thank you guys!

Regards,
Yosuke