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.
repo the name of the repo
rev a changeset.manifest revision
node a changeset node
changesets total number of changesets
file a filename
filerev a file revision
filerevs total number of file revisions
up the directory of the relevant file
path a path in the manifest, starting with "/"
basename a short pathname
date a date string
age age in hours, days, etc
line a line of text (escaped)
desc a description (escaped, with breaks)
shortdesc a short description (escaped)
author a name or email addressv(obfuscated)
parent a list of the parent
child a list of the children
tags a list of tag
header the global page header
footer the global page footer
files a list of file links
file_copies a list of pairs of name, source filenames
dirs a set of directory links
diff a diff of one or more files
annotate an annotated file
entries the entries relevant to the page
Templates and commands:
changelog(rev) - a page for browsing changesets
naventry - a link for jumping to a changeset number
filenodelink - jump to file diff
fileellipses - printed after maxfiles
changelogentry - an entry in the log
manifest - browse a manifest as a directory tree