How to add Gitlab custom variable in app.config xml file

Question

I'm working on C# project using Gitlab CI and would like to hide secrets in app.config file.

I added one variable in Gitlab and in app.config like this:

<add key="User" value="username" />
<add key="Password" value=$Password />

Then, when i try to build application in gitlab CI using msbuild, i receive an error:

$ msbuild "$PROJECTNAME.sln" /consoleloggerparameters:ErrorsOnly /t:Test_project /maxcpucount /nologo /property:Configuration=Release /verbosity:quiet app.config(5,33): error MSB3249: Application Configuration file "app.config" is invalid. '$' is an unexpected token. The expected token is '"' or '''. Line 7, position 33. [/builds/project/Test_project/Test_project.Service/Test_project.Service.csproj]

Please advice, how to add Gitlab environment variable in app.config xml file.

There should be quotes around the attribute value, which is what the error message is telling you - expected token is " or '. — Charles Mager
– Charles Mager, Commented Feb 18, 2020 at 14:58
@CharlesMager, if add a quotes around the attribute value it will be just text, not the value of variable: <add key="Password" value="$Password" /> cat ./Test_project.Service/bin/Release/Test_project.Service.exe.config ... <add key="Password" value="$Password" /> ... echo $Password password — archibald95
– archibald95, Commented Feb 18, 2020 at 15:08
Ah, ok - I've slightly missed the point here! I'm not sure I know enough about how Gitlab does this to comment, though the end result would still need quotes around it. Given it complains about the $ it would seem it's not being replaced at all. — Charles Mager
– Charles Mager, Commented Feb 18, 2020 at 15:15
@NicolasPepinster, yes, result is a text, like in previous comment: <add key="Password" value="%Password%" /> — archibald95
– archibald95, Commented Feb 19, 2020 at 8:02

jhook · Accepted Answer · 2021-12-01 14:00:58Z

1

For .xml files it should work using ${env.MY_VAR_DEFINED_IN_GITLAB}

Where MY_VAR_DEFINED_IN_GITLAB, as specified, is the variable defined in Gitlab Project (or group) -> Settings -> CI/CD -> Variables

Therefore in your case should work:

<add key="User" value=${env.GITLAB_VAR_USERNAME}/>
<add key="Password" value=${env.GITLAB_VAR_PASSWORD}/>

answered Dec 1, 2021 at 14:00

jhook

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