$ hg init t $ cd t $ echo 1 > foo $ hg ci -Am m adding foo $ cd .. $ hg clone t tt updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd tt $ echo 1.1 > foo $ hg ci -Am m $ cd ../t $ echo 1.2 > foo $ hg ci -Am m Should not update: $ hg pull -u ../tt pulling from ../tt searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) not updating: not a linear update (merge or update --check to force update) $ cd ../tt Should not update: $ hg pull -u ../t pulling from ../t searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (+1 heads) not updating: not a linear update (merge or update --check to force update) $ HGMERGE=true hg merge merging foo 0 files updated, 1 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg ci -mm $ cd ../t Should work: $ hg pull -u ../tt pulling from ../tt searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files (-1 heads) 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd ..