Get a report of differences with multiple versions from TFS?

Question

I used a different version control tool, and this allowed me to get a "report of differences": all changes made to the file between version X and version Y (including lines added / deleted between each version, which may be many versions) in one text file. It was very convenient for situations when you are quite sure that some code was used in your file, but now it is not (convenient when your BA says to add something, and you think: "Didn’t I understand ? ").

The advantage is that you get one text file that has all the changes in the code base that you can perform. This is equivalent to doing a comparison for each version (from 10 to 9, from 9 to 8, etc.), and then saving the results of each comparison with a text file.

I see no easy way to do this in TFS. Is there a plugin / powertool that does this? Google gave me nothing.

Answer 1

Paul made me go in the right direction, but the script I ended up in was a lot more complicated. And it may still be wrong. I had to consider file name changes.

$snapin = get-pssnapin  | select-string "Microsoft.TeamFoundation.PowerShell"

if ($snapin -eq $null) { 
Write-Host "loading snap in..."     
     Add-PSSnapin Microsoft.TeamFoundation.PowerShell 
  }

$fileName = $args[0]  Write-Host "// File name " $fileName 
$results = @(Get-TfsItemHistory $fileName )  | select changesetid, @{name="Path"; expression={$_.changes[0].item.serveritem}}

$i = 0

$cmdArray = @() 

do {   
   if ( $results[$i+1] -ne "" ) {   
   $cmdArray +=  "tf diff ""{0};{1}"" ""{2};{3}""  /format:unified" -f $results[$i].Path, $results[$i].ChangeSetId, $results[$i+1].Path, $results[$i+1].ChangeSetId     
   } ; 
    $i++ 
} until ($i -ge ($results.length - 1))

foreach ($cmd in $cmdArray) {   
   #Write-Host "// " $cmd   
   iex $cmd  }

Answer 2

. , , TFS Power Toys PowerShell. PowerShell:

Add-PSSnapin Microsoft.TeamFoundation.PowerShell

Get-TfsItemHistory foo.cs | foreach {
  tf diff "foo.cs;C$($_.ChangesetId)" `
          "foo.cs;C$($_.ChangesetId - 1)" `
          /format:unified
}