branchcache: add a "pure topological head" fast path
In a narrow but actually quick common case, all topological heads are all on
the same branch and all open. In this case, computing the branch map is very
simple. We can quickly detect situation where this situation will not change.
So we update the V3 format to be able to express this situation and upgrade the
update code to detect we remains in that mode.
The branch cache is populated with the actual value when the branch map is
accessed, but the update_disk method can do the update without needing to
populate it.
# A simple script for opening merge conflicts in editor
# A loose translation of contrib/editmerge to powershell
# Please make sure that both editmergeps.bat and editmerge.ps1 are available
# via %PATH% and use the following Mercurial settings to enable it
#
# [ui]
# editmergeps
# editmergeps.args=$output
# editmergeps.check=changed
# editmergeps.premerge=keep
$file=$args[0]
function Get-Lines
{
Select-String "^<<<<<<" $file | % {"$($_.LineNumber)"}
}
$ed = $Env:HGEDITOR;
if ($ed -eq $nil)
{
$ed = $Env:VISUAL;
}
if ($ed -eq $nil)
{
$ed = $Env:EDITOR;
}
if ($ed -eq $nil)
{
$ed = $(hg showconfig ui.editor);
}
if ($ed -eq $nil)
{
Write-Error "merge failed - unable to find editor"
exit 1
}
if (($ed -eq "vim") -or ($ed -eq "emacs") -or `
($ed -eq "nano") -or ($ed -eq "notepad++"))
{
$lines = Get-Lines
$firstline = if ($lines.Length -gt 0) { $lines[0] } else { $nil }
$previousline = $nil;
# open the editor to the first conflict until there are no more
# or the user stops editing the file
while (($firstline -ne $nil) -and ($firstline -ne $previousline))
{
if ($ed -eq "notepad++")
{
$linearg = "-n$firstline"
}
else
{
$linearg = "+$firstline"
}
Start-Process -Wait -NoNewWindow $ed $linearg,$file
$previousline = $firstline
$lines = Get-Lines
$firstline = if ($lines.Length -gt 0) { $lines[0] } else { $nil }
}
}
else
{
& "$ed" $file
}
$conflicts=Get-Lines
if ($conflicts.Length -ne 0)
{
Write-Output "merge failed - resolve the conflicts (line $conflicts) then use 'hg resolve --mark'"
exit 1
}
exit 0