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.
#!/bin/sh
hg init a
cd a
echo a > a
hg ci -Ama -d '1123456789 0'
hg --config server.uncompressed=True serve -p 20059 -d --pid-file=hg.pid
cat hg.pid >> $DAEMON_PIDS
cd ..
("$TESTDIR/tinyproxy.py" 20060 localhost >proxy.log 2>&1 </dev/null &
echo $! > proxy.pid)
cat proxy.pid >> $DAEMON_PIDS
sleep 2
echo %% url for proxy, stream
http_proxy=http://localhost:20060/ hg --config http_proxy.always=True clone --uncompressed http://localhost:20059/ b | \
sed -e 's/[0-9][0-9.]*/XXX/g' -e 's/[KM]\(B\/sec\)/X\1/'
cd b
hg verify
cd ..
echo %% url for proxy, pull
http_proxy=http://localhost:20060/ hg --config http_proxy.always=True clone http://localhost:20059/ b-pull
cd b-pull
hg verify
cd ..
echo %% host:port for proxy
http_proxy=localhost:20060 hg clone --config http_proxy.always=True http://localhost:20059/ c
echo %% proxy url with user name and password
http_proxy=http://user:passwd@localhost:20060 hg clone --config http_proxy.always=True http://localhost:20059/ d
echo %% url with user name and password
http_proxy=http://user:passwd@localhost:20060 hg clone --config http_proxy.always=True http://user:passwd@localhost:20059/ e
echo %% bad host:port for proxy
http_proxy=localhost:20061 hg clone --config http_proxy.always=True http://localhost:20059/ f
exit 0