[j-devel] 0.18.1.15

[Peter G. <pe...@ar...>]

This morning's development snapshot (j 0.18.1.15, lisp 0.0.0.30) is up:

    http://armedbear.org/j.zip          (source)
    http://armedbear.org/j-jar.zip      (just j.jar)

This snapshot should fix ssh directory buffers to work on systems where
the output of "ls -la" is not in English. In previous versions, j was
looking for a line starting with "total " to detect the start of the
directory listing. On a German system, however, what you get is
"insgesamt 16" rather than "total 16", so now j looks for a regular
expression that matches any non-numeric text, rather than just the
bare string "total ".

Investigation of this problem also revealed that using Ctrl W to close
the initial transcript buffer when the failure occurred led not to the
graceful recovery I had expected but rather to a complete hang. This
was a totally separate problem, and it too is now fixed.

For a long time, both of the known users of the edit-remote-files-via-
ssh feature have been plagued by the following disconcerting message in
their logs on an intermittent basis:

    BUG! SshSession.cleanup session is not in use but still locked

I've finally tracked this problem down: killBuffer() was eventually
calling SshSession.cleanup() in a situation where the buffer was no
longer in the buffer list (hence the session was no longer in use), but
the call sometimes occurred before the background thread that was using
the session had a chance to unlock it.

To resolve this, killBuffer() no longer calls SshSession.cleanup().
Now, when the user first opens an ssh buffer, j starts a background
cleanup thread. This thread checks on things once a minute, cleaning up
idle sessions as it deems fit, and then, when the session count goes to
zero, the cleanup thread exits. There are no longer any timing issues,
since the cleanup thread simply keeps working as long as any sessions
are locked or in use.

The same approach is now also used to clean up FTP sessions.

This snapshot also features a number of improvements to the Java
debugger (Alt X, "jdb") and the documentation thereof. Among other
things, the control dialog toolbar layout has changed, and there are
now useful jdb-related items (including "Run to current line") on the
right-button context menu in Java mode buffers when the debugger is
active. The tbreak command is now implemented as advertised.

Thanks for your support.

-Peter