Previously we were defaulting to stdout for diagnostics, which could interfere
with scripts or `nim c -r' programs outputting their results to stdout,
possibly mixing their output with compiler messages.
This change makes now Nim to be inline with other compilers emitting
diagnostics to stderr. Also now --stdout option has proper meaning making all
diagnostics to be sent to stdout instead.
NOTE: Tester now calls compiler with --stdout.
- node ext searcher also looks for "iojs" if no node(js?) found.
- koch ensures the local work dir compiler is freshly compiled before executing the tests.
- the tester can only run in the repo dir - now the compiler and libs used are also explicitly the local dirs - so no confusion from system wide pathing ("sufficiently sandboxed").
- fixed expectations in tmitems.nim test to match changes in json mod.
- re-layouted the columns / row printing slightly, making test fails pop out more, and everything "normal" layed back.
Motivation
----------
External tools need to know whether or not any test in suite failed. For
example buildbot, or packaging tool would like to stop the execution and
mark it as failed if some tests does not pass.
Modification
------------
Add `--pedantic` switch to tester program which will force it to quit
with non-zero exit code if at least one failure detected. Also update
`tests()` proc in koch to inspect result from tester and propagate it to
user.
Result
------
Nothing has changed in default behaviour. But following invocations will
exit with non-zero code if there failed tests:
./koch tests --pedantic all
./tests/testament/tester --pedantic all
