#!/bin/sh

heads()

{

    hg heads --template '{rev}: {desc|firstline|strip} ({branches})\n' "$@"

}

hg init a

cd a

echo 'root' >root

hg add root

hg commit -m "Adding root node"

heads

echo '-------'

heads .

echo '======='

echo 'a' >a

hg add a

hg branch a

hg commit -m "Adding a branch"

heads

echo '-------'

heads .

echo '======='

hg update -C 0

echo 'b' >b

hg add b

hg branch b

hg commit -m "Adding b branch"

heads

echo '-------'

heads .

echo '======='

echo 'bh1' >bh1

hg add bh1

hg commit -m "Adding b branch head 1"

heads

echo '-------'

heads .

echo '======='

hg update -C 2

echo 'bh2' >bh2

hg add bh2

hg commit -m "Adding b branch head 2"

heads

echo '-------'

heads .

echo '======='

hg update -C 2

echo 'bh3' >bh3

hg add bh3

hg commit -m "Adding b branch head 3"

heads

echo '-------'

heads .

echo '======='

hg merge 4

hg commit -m "Merging b branch head 2 and b branch head 3"

heads

echo '-------'

heads .

echo '======='

echo 'c' >c

hg add c

hg branch c

hg commit -m "Adding c branch"

heads

echo '-------'

heads .

echo '======='

heads -r 3 .

echo $?

echo '-------'

heads -r 2 .

echo $?

echo '-------'

hg update -C 4

echo $?

echo '-------'

heads -r 3 .

echo $?

echo '-------'

heads -r 2 .

echo $?

echo '-------'

heads -r 7 .

echo $?

echo '======='

for i in 0 1 2 3 4 5 6 7; do

    hg update -C "$i"

    heads

    echo '-------'

    heads .

    echo '-------'

done

echo '======='

for i in a b c z; do

    heads "$i"

    echo '-------'

done

echo '======='

heads 0 1 2 3 4 5 6 7

echo '% topological heads'

heads -t

echo '______________'

cd ..

hg init newheadmsg

cd newheadmsg

echo '% created new head message'

echo '% init: no msg'

echo 1 > a

hg ci -Am "a0: Initial root"

echo 2 >> a

hg ci -m "a1 (HN)"

hg branch b

echo 1 > b

hg ci -Am "b2: Initial root for branch b"

echo 2 >> b

hg ci -m "b3 (HN)"

echo '% case NN: msg'

hg up -q null

hg branch -f b

echo 1 > B

hg ci -Am "b4 (NN): new topo root for branch b"

echo '% case HN: no msg'

echo 2 >> B

hg ci -m "b5 (HN)"

echo '% case BN: msg'

hg branch -f default

echo 1 > A

hg ci -Am "a6 (BN): new branch root"

echo '% case CN: msg'

hg up -q 4

echo 3 >> BB

hg ci -Am "b7 (CN): regular new head"

echo '% case BB: msg'

hg up -q 4

hg merge -q 3

hg branch -f default

hg ci -m "a8 (BB): weird new branch root"

echo '% case CB: msg'

hg up -q 4

hg merge -q 1

hg ci -m "b9 (CB): new head from branch merge"

echo '% case HB: no msg'

hg up -q 7

hg merge -q 6

hg ci -m "b10 (HB): continuing head from branch merge"

echo '% case CC: msg'

hg up -q 4

hg merge -q 2

hg ci -m "b11 (CC): new head from merge"

echo '% case CH: no msg'

hg up -q 2

hg merge -q 10

hg ci -m "b12 (CH): continuing head from merge"

echo '% case HH: no msg'

hg merge -q 3

hg ci -m "b12 (HH): merging two heads"