tests/test-convert-p4

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

"$TESTDIR/hghave" p4 || exit 80

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

echo % create p4 depot
P4ROOT=`pwd`/depot; export P4ROOT
P4AUDIT=$P4ROOT/audit; export P4AUDIT
P4JOURNAL=$P4ROOT/journal; export P4JOURNAL
P4LOG=$P4ROOT/log; export P4LOG
P4PORT=localhost:16661; export P4PORT
P4DEBUG=1; export P4DEBUG

echo % start the p4 server
[ ! -d $P4ROOT ] && mkdir $P4ROOT
p4d -f -J off >$P4ROOT/stdout 2>$P4ROOT/stderr &
trap "echo % stop the p4 server ; p4 admin stop" EXIT

# wait for the server to initialize
while ! p4 ; do
   sleep 1
done >/dev/null 2>/dev/null

echo % create a client spec
P4CLIENT=hg-p4-import; export P4CLIENT
DEPOTPATH=//depot/test-mercurial-import/...
p4 client -o | sed '/^View:/,$ d' >p4client
echo View: >>p4client
echo " $DEPOTPATH //$P4CLIENT/..." >>p4client
p4 client -i <p4client

echo % populate the depot
echo a > a
mkdir b
echo c > b/c
p4 add a b/c
p4 submit -d initial

echo % change some files
p4 edit a
echo aa >> a
p4 submit -d "change a"

p4 edit b/c
echo cc >> b/c
p4 submit -d "change b/c"

echo % convert
hg convert -s p4 $DEPOTPATH dst
hg -R dst log --template 'rev={rev} desc="{desc}" tags="{tags}" files="{files}"\n'

echo % change some files
p4 edit a b/c
echo aaa >> a
echo ccc >> b/c
p4 submit -d "change a b/c"

echo % convert again
hg convert -s p4 $DEPOTPATH dst
hg -R dst log --template 'rev={rev} desc="{desc}" tags="{tags}" files="{files}"\n'

echo % interesting names
echo dddd > "d d"
mkdir " e"
echo fff >" e/ f"
p4 add "d d" " e/ f"
p4 submit -d "add d e f"

echo % convert again
hg convert -s p4 $DEPOTPATH dst
hg -R dst log --template 'rev={rev} desc="{desc}" tags="{tags}" files="{files}"\n'