cmd/dist: only run swig tests when a go directory is present in swiglib

When there is no go directory inside the swiglib directory then swig
was installed without Go support. Tests in misc/swig will fail when
swig is installed without Go support.

Add additional checks for the presence of a go directory in the directory
reported by 'swig -go -swiglib' to determine if misc/swig tests should
be run.

This avoids all.bash failing when swig but not swig-go is installed
using macports.

Tested on darwin with swig and with and without swig-go installed
using macports.

Fixes #23469

Change-Id: I173201221554982ea0d9f2bea70a3cb85b297cec
Reviewed-on: https://go-review.googlesource.com/88776
Reviewed-by: David Chase <drchase@google.com>
1 file changed
tree: 9eeb5a299a7d21b0dfe8ce5cebc00d48152cece8
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. CONTRIBUTING.md
  12. CONTRIBUTORS
  13. favicon.ico
  14. LICENSE
  15. PATENTS
  16. README.md
  17. robots.txt
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