template: add revset() template function Adds a template function that executes a revset and returns the list of revisions as the result. It has the signature 'revset(query [, args...])'. The args are optional and are applied to the query string using the standard python string.format(args) pattern. This allows things like: '{revset("parents({0})", rev)}' to produce the parents of each individual commit in the log output. If no args are specified, the revset result is cached for the duration of the templater; so it's better to not use args if performance is a concern. By itself, revset() can be used to print commit parents, print the common ancestor of a commit with the main branch, etc. It can be used with the ifcontains() function to do things like '{ifcontains(rev, revset('.'), label(...), ...)}' to color the working copy parent, to color certain branches, to color draft commits, etc.

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import os

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from hgext import color

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from mercurial import dispatch, ui

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# ensure errors aren't buffered

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testui = color.colorui()

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testui.pushbuffer()

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testui.write(('buffered\n'))

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testui.warn(('warning\n'))

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testui.write_err('error\n')

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print repr(testui.popbuffer())

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# test dispatch.dispatch with the same ui object

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hgrc = open(os.environ["HGRCPATH"], 'w')

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hgrc.write('[extensions]\n')

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hgrc.write('color=\n')

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hgrc.close()

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ui_ = ui.ui()

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ui_.setconfig('ui', 'formatted', 'True')

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# we're not interested in the output, so write that to devnull

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ui_.fout = open(os.devnull, 'w')

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# call some arbitrary command just so we go through

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# color's wrapped _runcommand twice.

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def runcmd():

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    dispatch.dispatch(dispatch.request(['version', '-q'], ui_))

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runcmd()

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print "colored? " + str(issubclass(ui_.__class__, color.colorui))

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runcmd()

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print "colored? " + str(issubclass(ui_.__class__, color.colorui))