convert: workaround for cvsps.cache under Windows
In non-cygwin environment, cvsps fails to create its cache directory and redirect its output to stderr. Just ignore the error and capture stderr as well.
adding bar
adding foo
adding quux1
adding quux2
merging bar
merging bar failed!
merging foo and baz
merging baz failed!
1 files updated, 0 files merged, 0 files removed, 2 files unresolved
There are unresolved merges, you can redo the full merge using:
hg update -C 2
hg merge 1
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
merging bar
merging bar failed!
merging baz and foo
merging baz failed!
1 files updated, 0 files merged, 0 files removed, 2 files unresolved
There are unresolved merges, you can redo the full merge using:
hg update -C 1
hg merge 2