convert: add a mode where mercurial_sink skips empty revisions. The getchanges function of some converter_source classes can return some false positives. I.e. they sometimes claim that a file "foo" was changed in some revision, even though its contents are still the same. convert_svn is particularly bad, but I think this can also happen with convert_cvs and, at least in theory, with mercurial_source. For regular conversions this is not really a problem - as long as getfile returns the right contents, we'll get a converted revision with the right contents. But when we use --filemap, this could lead to superfluous revisions being converted. Instead of fixing every converter_source, I decided to change mercurial_sink to work around this problem. When --filemap is used, we're interested only in revisions that touch some specific files. If a revision doesn't change any of these files, then we're not interested in it (at least for revisions with a single parent; merges are special). For mercurial_sink, we abuse this property and rollback a commit if the manifest text hasn't changed. This avoids duplicating the logic from localrepo.filecommit to detect unchanged files.

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#!/bin/sh

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echo '% Show all commands except debug commands'

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hg debugcomplete

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echo

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echo '% Show all commands that start with "a"'

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hg debugcomplete a

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echo

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echo '% Do not show debug commands if there are other candidates'

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hg debugcomplete d

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echo

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echo '% Show debug commands if there are no other candidates'

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hg debugcomplete debug

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echo

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echo '% Do not show the alias of a debug command if there are other candidates'

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echo '% (this should hide rawcommit)'

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hg debugcomplete r

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echo

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echo '% Show the alias of a debug command if there are no other candidates'

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hg debugcomplete rawc

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echo

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echo '% Show the global options'

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hg debugcomplete --options | sort

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echo

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echo '% Show the options for the "serve" command'

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hg debugcomplete --options serve | sort

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echo

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echo '% Show an error if we use --options with an ambiguous abbreviation'

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hg debugcomplete --options s

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exit 0