SVN Commit: OMake Build System [0.9.8.x] (Rev. 11135)

- Made the "exit n" Shell aliases work corrently again (only exit from the
  innermost Shell alias, not kill the whole shell session, as it started doing
  after the rev. 11110 fix to bug #679).
  I fixed this by using the ExitParentException idea outlined in
  http://lists.metaprl.org/pipermail/omake-devel/2007-June/000528.html

- Pipelines like "(exit 5)" should not print a "Process group exception" error
  message; instead they should just return the appropriate exit code.
  The fix is simple - just catch the ExitExceptions in appropriate places.

- Pipilines like "false || exit 5" should return the correct error code, not
  0. (This was broken in previous versions of OMake as well).
  My fix is to have Omake_shell_job.create_job execute the PipeCond pipelines
  in the current process. (Added a TODO comment to do the same with the
  right-hand-sides of the PipeCompose pipelines).

- Updated the test suite to catch some of the above problems.
  Also updated the "omake clean" in the test directory to be a bit more
  thorough.

----
Changes:
    +1 -1       omake-branches/0.9.8.x/lib/Pervasives.om
    +1 -0       omake-branches/0.9.8.x/src/build/omake_build.ml
    +3 -1       omake-branches/0.9.8.x/src/build/omake_rule.ml
    +7 -2       omake-branches/0.9.8.x/src/builtin/omake_builtin_base.ml
    +2 -0       omake-branches/0.9.8.x/src/env/omake_exn_print.ml
    +1 -0       omake-branches/0.9.8.x/src/ir/omake_value_type.ml
    +119 -100   omake-branches/0.9.8.x/src/shell/omake_shell_job.ml
    +8 -1       omake-branches/0.9.8.x/test/OMakefile
    +9 -6       omake-branches/0.9.8.x/test/shell/Test3/run.osh
    +18 -0      omake-branches/0.9.8.x/test/shell/Test4/run.osh
 
A hyperlinked version of this commit is available at
http://svn.metaprl.org/commitlogs/omake/2007-06.html#07/06/26.10:30:58