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
cp "$TESTDIR"/printenv.py .
http_proxy= hg clone static-http://localhost:20059/ copy
echo $?
test -d copy || echo copy: No such file or directory
# This server doesn't do range requests so it's basically only good for
# one pull
cat > dumb.py <<EOF
import BaseHTTPServer, SimpleHTTPServer, signal
def run(server_class=BaseHTTPServer.HTTPServer,
handler_class=SimpleHTTPServer.SimpleHTTPRequestHandler):
server_address = ('localhost', 20059)
httpd = server_class(server_address, handler_class)
httpd.serve_forever()
signal.signal(signal.SIGTERM, lambda x: sys.exit(0))
run()
EOF
python dumb.py 2>/dev/null &
echo $! >> $DAEMON_PIDS
mkdir remote
cd remote
hg init
echo foo > bar
hg add bar
hg commit -m"test" -d "1000000 0"
hg tip
cd ..
http_proxy= hg clone static-http://localhost:20059/remote local
cd local
hg verify
cat bar
cd ../remote
echo baz > quux
hg commit -A -mtest2 -d '100000000 0'
cd ../local
echo '[hooks]' >> .hg/hgrc
echo 'changegroup = python ../printenv.py changegroup' >> .hg/hgrc
http_proxy= hg pull
echo '% test with "/" URI (issue 747)'
cd ..
hg init
echo a > a
hg add a
hg ci -ma
http_proxy= hg clone static-http://localhost:20059/ local2
cd local2
hg verify
cat a
hg paths
kill $!