# 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