cbuild-idx.yml does not expand variables

[ReinhardKeil]

Describe the bug
For layers, the cbuild-idx.yml does not expand variables

To Reproduce
Use the USB example with layers in the csolution.yml.

  target-types:
    - type: B-U585I-IOT02A
      board: STMicroelectronics::B-U585I-IOT02A
      variables:
        - Board-Layer: /Users/.../AppData/Local/Arm/Packs/Keil/B-U585I-IOT02A_BSP/2.0.0-dev0/Layers/IoT/Board.clayer.yml

The output in cbuild-idx.yml is:

build-idx:
  generated-by: csolution version 2.3.0-dev0
  cdefault: cdefault.yml
  csolution: USB.csolution.yml
  cprojects:
    - cproject: Device/HID/HID.cproject.yml
      clayers:
        - clayer: Device/HID/$Board-Layer$

Expected behavior

  cprojects:
    - cproject: Device/HID/HID.cproject.yml
      clayers:
        - clayer: /Users/.../AppData/Local/Arm/Packs/Keil/B-U585I-IOT02A_BSP/2.0.0-dev0/Layers/IoT/Board.clayer.yml

Environment (please complete the following information):

• solution version 2.3.0-dev0
• OS: Windows

[jkrech]

One remark: The variables most likely are context (target-type) specific.
This would require the variable definition to be added to the context/configuration information.

[ReinhardKeil]

@jkrech, you are correct - it is only relevant when the context is known. Perhaps the layer information should be added under cbuilds: that list all the context. However it is not a bug.

[jkrech]

We could display the variable definitions only?

cbuilds:
  -cbuild: Device/HID/HID.Debug+B-U585I-IOT02A.cbuild.yml
    project: HID
    configuration: .Debub+B-U585I-IOT02A
    variables:
      - Board-Layer: /Users/.../AppData/Local/Arm/Packs/Keil/B-U585I-IOT02A_BSP/2.0.0-dev0/Layers/IoT/Board.clayer.yml

[ReinhardKeil]

Addressing #1428 should be sufficient. Hence I'm closing this one.

[ReinhardKeil]

Sorry I was wrong. Paths should be expanded in build information files, otherwise the IDE needs to deal with it.