util: introduce util.debugstacktrace for showing a stack trace without crashing This is often very handy when hacking/debugging. Calling util.debugstacktrace('hey') from a place in hg will give something like: hey at: ./hg:38 in <module> /home/user/hgsrc/mercurial/dispatch.py:28 in run /home/user/hgsrc/mercurial/dispatch.py:65 in dispatch /home/user/hgsrc/mercurial/dispatch.py:88 in _runcatch /home/user/hgsrc/mercurial/dispatch.py:740 in _dispatch /home/user/hgsrc/mercurial/dispatch.py:514 in runcommand /home/user/hgsrc/mercurial/dispatch.py:830 in _runcommand /home/user/hgsrc/mercurial/dispatch.py:801 in checkargs /home/user/hgsrc/mercurial/dispatch.py:737 in <lambda> /home/user/hgsrc/mercurial/util.py:472 in check ...

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  $ hg init 1

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  $ echo '[ui]' >> 1/.hg/hgrc

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  $ echo 'timeout = 10' >> 1/.hg/hgrc

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  $ echo foo > 1/foo

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  $ hg --cwd 1 ci -A -m foo

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  adding foo

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  $ hg clone 1 2

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  updating to branch default

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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

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  $ hg clone 2 3

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  updating to branch default

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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

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  $ echo '[hooks]' >> 2/.hg/hgrc

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  $ echo 'changegroup.push = hg push -qf ../1' >> 2/.hg/hgrc

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  $ echo bar >> 3/foo

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  $ hg --cwd 3 ci -m bar

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  $ hg --cwd 3 push ../2

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  pushing to ../2

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  searching for changes

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  adding changesets

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  adding manifests

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  adding file changes

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  added 1 changesets with 1 changes to 1 files

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