(Hello, I am just starting to work with Spoofax 2.0.0 and it is my first time reporting an issue here. So I hope I give enough info to investigate the issue and am happy if I can help with more details.)

When building a Spoofax 2.0.0-beta1 project with mvn clean install I get the following error for all “non-wildcard imports” in nab and ts files (just an example error for a ts file, see below):

[INFO] Building 23 sources, 0 includes of language impl. org.metaborg:org.metaborg.meta.lang.ts:2.0.0-beta1
[ERROR] ERROR in file:///home/dlehmann/projectname/trans/analysis/types/varkinds.ts:7
[ERROR]       names/analysis/names/iterators
[ERROR]       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[ERROR] Unresolved reference
[ERROR] 
[ERROR] ERROR in file:///home/dlehmann/projectname/trans/analysis/types/varkinds.ts:5
[ERROR]       signatures/analysis/types/VarKinds-sig
[ERROR]       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[ERROR] Unresolved reference
[ERROR] 
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------

Example file where the error occurs:

module analysis/types/varkinds

imports

  signatures/-
  signatures/analysis/types/VarKinds-sig

  names/analysis/names/iterators

type rules

  VarRef(r)    +
  VarAssign(r) has varKind ik
  where definition of r has varKind ik
     or Local() => ik

Workaround with wildcard imports, no error when building:

module analysis/types/varkinds

imports

  signatures/-
  signatures/analysis/types/-

  names/analysis/names/-

type rules

  VarRef(r)    +
  VarAssign(r) has varKind ik
  where definition of r has varKind ik
     or Local() => ik

src-gen/signatures/analysis/types/VarKinds-sig.str exists after build and contains (excerpt):

module signatures/analysis/types/VarKinds-sig

imports


signature
  constructors
    InArg         : VarKind
    OutArg        : VarKind
    Local         : VarKind

and src-gen/names/analysis/names/iterators.str exists also. Do I miss something? I have the same issue/error for non-wildcard imports in nab-files.

Submitted by Daniel Lehmann on 23 May 2016 at 19:27

NaBL imports of non-NaBL files and TS imports of non-TS files will give errors. Add NameBindingLanguage and TypeSystemLanguage to the pardonedLanguages list in the metaborg.yaml configuration file to ignore their errors. See http://spoofax.readthedocs.io/en/latest/source/langdev/manual/config.html for more info about that configuration option.

Thanks, it builds without errors now. Just out of interest two questions:
1. Is it wrong to import non-NaBL files in NaBL? Or put differently: Why is this an error and what is the “correct” way to work around it? (Since silencing the error feels somewhat like a code-smell ;) )
2. Why is this not an error when building the project inside Spoofax/Eclipse?

It’s not wrong, we just don’t have a solution for cross-language imports. This is the workaround.

Eclipse builds don’t check for errors in the build, because they are shown in the editor.