HPCC-29742 Fix problem with eclcc when filename is not an valid identifier

[ghalliday]

• Treat the ecl file in the same way as submitting from stdin, or any other file that is not part of a repository

Type of change:

• This change is a bug fix (non-breaking change which fixes an issue).
• This change is a new feature (non-breaking change which adds functionality).
• This change improves the code (refactor or other change that does not change the functionality)
• This change fixes warnings (the fix does not alter the functionality or the generated code)
• This change is a breaking change (fix or feature that will cause existing behavior to change).
• This change alters the query API (existing queries will have to be recompiled)

Checklist:

• My code follows the code style of this project.
  • My code does not create any new warnings from compiler, build system, or lint.
• The commit message is properly formatted and free of typos.
  • The commit message title makes sense in a changelog, by itself.
  • The commit is signed.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly, or...
  • I have created a JIRA ticket to update the documentation.
  • Any new interfaces or exported functions are appropriately commented.
• I have read the CONTRIBUTORS document.
• The change has been fully tested:
  • I have added tests to cover my changes.
  • All new and existing tests passed.
  • I have checked that this change does not introduce memory leaks.
  • I have used Valgrind or similar tools to check for potential issues.
• I have given due consideration to all of the following potential concerns:
  • Scalability
  • Performance
  • Security
  • Thread-safety
  • Cloud-compatibility
  • Premature optimization
  • Existing deployed queries will not be broken
  • This change fixes the problem, not just the symptom
  • The target branch of this pull request is appropriate for such a change.
• There are no similar instances of the same problem that should be addressed
  • I have addressed them here
  • I have raised JIRA issues to address them separately
• This is a user interface / front-end modification
  • I have tested my changes in multiple modern browsers
  • The component(s) render as expected

Smoketest:

• Send notifications about my Pull Request position in Smoketest queue.
• Test my draft Pull Request.

Testing:

[github-actions]

https://track.hpccsystems.com/browse/HPCC-29742
Jira updated

[ghalliday]

@GordonSmith what is your opinion on this, and whether the change is ok. It means that if you submit a query from a directory that is part of your include path then they cannot access the symbol $. That actually affects some of out regression tests -

csv-escaped.ecl:import $.setup;
splitter-partialstart.ecl:import $.setup;
translate-diskgrouped.ecl:import $.setup;

That suggests the change isn't a good idea.

[shamser]

Bug unrelated to this issue: Line 1080-1081 should really be:

if (isPathSepChar(*tail))
    tail++
else if (*tail!=nullptr) 
    break; // to avoid matching part of the filename in expandedSourceName