help: remove per-extension paragraph on how to enable it
The central place to find this information is the "extensions" help topic.
#!/bin/sh
rm -rf sub
mkdir sub
cd sub
hg init t
cd t
echo % first revision, no sub
echo a > a
hg ci -Am0
echo % add first sub
echo s = s > .hgsub
hg add .hgsub
hg init s
echo a > s/a
hg -R s ci -Ams0
hg ci -m1
echo % add sub sub
echo ss = ss > s/.hgsub
hg init s/ss
echo a > s/ss/a
hg -R s add s/.hgsub
hg -R s/ss add s/ss/a
hg ci -m2
echo % bump sub rev
echo b > s/a
hg -R s ci -ms1
hg ci -m3
echo % leave sub dirty
echo c > s/a
hg ci -m4
hg tip -R s
echo % check caching
hg co 0
hg debugsub
echo % restore
hg co
hg debugsub
echo % new branch for merge tests
hg co 1
echo t = t >> .hgsub
hg init t
echo t > t/t
hg -R t add t
echo % 5
hg ci -m5 # add sub
echo t2 > t/t
echo % 6
hg st -R s
hg ci -m6 # change sub
hg debugsub
echo t3 > t/t
echo % 7
hg ci -m7 # change sub again for conflict test
hg rm .hgsub
echo % 8
hg ci -m8 # remove sub
echo % merge tests
hg co -C 3
hg merge 5 # test adding
hg debugsub
hg ci -m9
hg merge 6 --debug # test change
hg debugsub
echo conflict > t/t
hg ci -m10
HGMERGE=internal:merge hg merge --debug 7 # test conflict
echo % should conflict
cat t/t
echo % clone
cd ..
hg clone t tc
cd tc
hg debugsub
echo % push
echo bah > t/t
hg ci -m11
hg push | sed 's/ .*sub/ ...sub/g'
echo % push -f
echo bah > s/a
hg ci -m12
hg push | sed 's/ .*sub/ ...sub/g'
hg push -f | sed 's/ .*sub/ ...sub/g'
echo % update
cd ../t
hg up -C # discard our earlier merge
echo blah > t/t
hg ci -m13
echo % pull
cd ../tc
hg pull | sed 's/ .*sub/ ...sub/g'
hg up # should pull t
cat t/t