tests/test-branches

log: remove increasing windows usage in fastpath

The purpose of increasing windows is to allow backwards iteration on the
filelog  at a reasonable cost.
But is it needed?
 - if follow is False, we have no reason to iterate backwards.
   We basically just want to walk the complete filelog and yield all revisions
   within the revision range. We can do this forward or
   backwards, as it only reads the index.
 - when follow is True, we need to examine the contents of the filelog, and to
   do this efficiently we need to read the filelog forward.
   And on the other hand, to track ancestors and copies, we need to process
   revisions backwards. But is it necessary to use increasing windows
   for this?
   We can iterate over the complete filelog forward, stack the revisions, and
   read the reversed(pile), it does the same thing with a more readable code.

#!/bin/sh

hg init a
cd a
echo 'root' >root
hg add root
hg commit -d '0 0' -m "Adding root node"

echo 'a' >a
hg add a
hg branch a
hg commit -d '1 0' -m "Adding a branch"

hg branch q
echo 'aa' >a
hg branch -C
hg commit -d '2 0' -m "Adding to a branch"

hg update -C 0
echo 'b' >b
hg add b
hg branch b
hg commit -d '2 0' -m "Adding b branch"

echo 'bh1' >bh1
hg add bh1
hg commit -d '3 0' -m "Adding b branch head 1"

hg update -C 2
echo 'bh2' >bh2
hg add bh2
hg commit -d '4 0' -m "Adding b branch head 2"

echo 'c' >c
hg add c
hg branch c
hg commit -d '5 0' -m "Adding c branch"

hg branch tip
hg branch null
hg branch .

echo 'd' >d
hg add d
hg branch 'a branch name much longer than the default justification used by branches'
hg commit -d '6 0' -m "Adding d branch"

hg branches
echo '-------'
hg branches -a

echo "--- Branch a"
hg log -b a

echo "---- Branch b"
hg log -b b

echo "---- going to test branch closing"
hg branches
hg up -C b
echo 'xxx1' >> b
hg commit -d '7 0' -m 'adding cset to branch b'
hg up -C aee39cd168d0
echo 'xxx2' >> b
hg commit -d '8 0' -m 'adding head to branch b'
echo 'xxx3' >> b
hg commit -d '9 0' -m 'adding another cset to branch b'
hg branches
hg heads --closed
hg heads
hg commit -d '9 0' --close-branch -m 'prune bad branch'
hg branches -a
hg up -C b
hg commit -d '9 0' --close-branch -m 'close this part branch too'
echo '--- b branch should be inactive'
hg branches
hg branches -c
hg branches -a
hg heads b
hg heads --closed b
echo 'xxx4' >> b
hg commit -d '9 0' -m 'reopen branch with a change'
echo '--- branch b is back in action'
hg branches -a
echo '---- test heads listings'
hg heads
echo '% branch default'
hg heads default
echo '% branch a'
hg heads a
hg heads --active a
echo '% branch b'
hg heads b
hg heads --closed b