Test if logtoprocess correctly captures command-related log calls.

  $ hg init

  $ cat > $TESTTMP/foocommand.py << EOF

  > from mercurial import cmdutil

  > from time import sleep

  > cmdtable = {}

  > command = cmdutil.command(cmdtable)

  > @command('foo', [])

  > def foo(ui, repo):

  >     ui.log('foo', 'a message: %(bar)s\n', bar='spam')

  > EOF

  $ cat >> $HGRCPATH << EOF

  > [extensions]

  > logtoprocess=

  > foocommand=$TESTTMP/foocommand.py

  > [logtoprocess]

  > command=echo 'logtoprocess command output:';

  >     echo "\$EVENT";

  >     echo "\$MSG1";

  >     echo "\$MSG2"

  > commandfinish=echo 'logtoprocess commandfinish output:';

  >     echo "\$EVENT";

  >     echo "\$MSG1";

  >     echo "\$MSG2";

  >     echo "\$MSG3"

  > foo=echo 'logtoprocess foo output:';

  >     echo "\$EVENT";

  >     echo "\$MSG1";

  >     echo "\$OPT_BAR"

  > EOF

Running a command triggers both a ui.log('command') and a

ui.log('commandfinish') call. The foo command also uses ui.log.

Use head to ensure we wait for all lines to be produced, and sort to avoid

ordering issues between the various processes we spawn:

  $ hg foo | head -n 17 | sort

  0

  a message: spam

  command

  commandfinish

  foo

  foo

  foo

  foo

  foo exited 0 after * seconds (glob)

  logtoprocess command output:

  logtoprocess commandfinish output:

  logtoprocess foo output:

  spam