`ogma-core`: FPrime backend now requires JAVA

[ivanperez-keera]

Description

The FPrime backend now requires java, which makes the generated Dockerfile no longer compile.

Type

• Bug: Generated docker image does not build.

Additional context

None.

Requester

• Ivan Perez.

Method to check presence of bug

Running the FPrime backend and compiling the generated code with the following files breaks when trying to build the docker image generated by Ogma:

$ ogma standalone --file-name /tmp/document.json -f /tmp/json-format.cfg -p literal --target-file-name copilot --target-dir fprime_demo
$ ogma fprime --app-target-dir fprime_demo --handlers-file /tmp/fprime-handlers --input-file /tmp/document.json -f /tmp/json-format.cfg -p literal --variable-db /tmp/fprime-variable-db
$ cabal v1-exec -- runhaskell fprime_demo/Copilot.hs
$ mv copilot* fprime_demo/
$ cd fprime_demo/
$ docker build -t ogma fprime-demo .

Auxiliary files:

--- document.json
{
  "Example": {
    "internal_variables": [],
    "external_variables": [
      {"name":"input", "type":"Float", "meaning": "Input from the system"}
    ],
    "properties": [
      {
        "id":      "MyProperty",
        "formula": "PTLTL.alwaysBeen (input /= 30.0)",
        "text":    "Input is never 30"
      }
    ]
  }
}

--- fprime-handlers
handlerMyProperty

--- fprime-variable-db
("pullup", "bool")
("input", "float")

--- json-format.cfg
JSONFormat
   { specInternalVars    = Just "..internal_variables[*]"
   , specInternalVarId   = ".name"
   , specInternalVarExpr = ".meaning"
   , specInternalVarType = Just ".type"
   , specExternalVars    = Just "..external_variables[*]"
   , specExternalVarId   = ".name"
   , specExternalVarType = Just ".type"
   , specRequirements    = "..properties[*]"
   , specRequirementId   = ".id"
   , specRequirementDesc = Just ".text"
   , specRequirementExpr = ".formula"
   }

These build steps break with the message:

fpp tools require 'java'. Please install 'java' and ensure it is in your PATH.

Expected result

The build steps above should complete successfully.

Desired result

The build steps above should complete successfully.

Proposed solution

Modify Dockerfile in the default FPrime template to install default-jre.

Further notes

None.

[ivanperez-keera]

Change Manager: Confirmed that the issue exists.

[ivanperez-keera]

Technical Lead: Confirmed that the issue should be addressed.

[ivanperez-keera]

Technical Lead: Issue scheduled for fixing in Ogma 1.6.0.

Fix assigned to: @ivanperez-keera .