Allow overriding variables that have been assigned a value in the configuration file

[RubenVerborgh]

Variables have been added to Components.js in v3.6.0. We can set them programmatically: https://github.com/solid/community-server/blob/e1533a0869071bbeabf0edfdfd05ccf57883cdaa/src/init/CliRunner.ts#L42-L46

However, could I also give them a value inside the Components.js config? CommunitySolidServer/CommunitySolidServer@1dd140a#diff-fec64cbd09e800f0351eb81eaaef521a1b9fecef9f81a3584d513e4f1266b6c0R4-R15
That might be handy to propagate string/number values around.

[rubensworks]

Actually, something like this may already work (untested):

{
  "@id": "ex:myComponentInstance",
  "ex:param": { "@id": "ex:myVariable" }
}

{
  "@id": "ex:myVariable",
  "value": "123"
}

[RubenVerborgh]

They can act as a default that can be overwritten by configuration.
(On that note… can we overwrite any component? 😛)

[rubensworks]

On that note… can we overwrite any component?

You can only overwrite default values in parameters. If you actually instantiate a param's value, you can only append values, not overwrite them.

[RubenVerborgh]

value conformed working (for variables); I love it.

[RubenVerborgh]

Mmm, was too soon. Seems like variables with a configured value cannot be overridden.

[RubenVerborgh]

Actually, something like this may already work (untested):

{
  "@id": "ex:myComponentInstance",
  "ex:param": { "@id": "ex:myVariable" }
}

{
  "@id": "ex:myVariable",
  "value": "123"
}

Actually, only the first one works; the second one does not.