tests/test-mq-qimport-fail-cleanup

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
#failed qimport of patches from files should cleanup by recording successfully
#imported patches in series file.

echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH

hg init repo
cd repo

echo a > a
hg ci -Am'add a'

cat >b.patch<<EOF
diff --git a/a b/a
--- a/a
+++ b/a
@@ -1,1 +1,2 @@
 a
+b
EOF

echo
echo '#empty series'
hg qseries

echo
echo '#qimport valid patch followed by invalid patch'
hg qimport b.patch fakepatch

echo
echo '#valid patches before fail added to series'
hg qseries