git diff --numstat gives different error in newer versions of git. make it not crash on warnings for which no code exists

Author: Laoujin

Tests/Parse-GitStatus-WithNumstat.Tests.ps1

@@ -84,4 +84,40 @@ Describe 'Parse-GitStatus - with Numstat' {
 
 		$result.lineEndings | Should -Be 'LF -> CRLF'
 	}
+
+	It 'does not crash when there is some new, unexpected, warning' {
+		# This test fails on the CI because of Write-Error resulting in a WriteErrorException
+		# Adding -ErrorAction silentlycontinue already made it crash locally
+		Mock Invoke-Git {
+			if (([string]$args).StartsWith("status")) {
+				" M TestDrive:\file0"
+			} else {
+				# git diff --numstat
+				Write-Error "warning: this is completely unexpected"
+				" `t5`t3`tTestDrive:\file0"
+			}
+		}
+
+		$result = Parse-GitStatus $true
+
+		$result.lineEndings | Should -Be $null
+	}
+
+	It 'adds LF/CRLF warnings to the fileInfo (updated error message for git 2.26+)' {
+		# This test fails on the CI because of Write-Error resulting in a WriteErrorException
+		# Adding -ErrorAction silentlycontinue already made it crash locally
+		Mock Invoke-Git {
+			if (([string]$args).StartsWith("status")) {
+				" M TestDrive:\file0"
+			} else {
+				# git diff --numstat
+				Write-Error "warning: in the working copy of 'TestDrive:\file0', LF will be replaced by CRLF the next time Git touches it"
+				" `t5`t3`tTestDrive:\file0"
+			}
+		}
+
+		$result = Parse-GitStatus $true
+
+		$result.lineEndings | Should -Be 'LF -> CRLF'
+	}
 }

lib/Parse-GitStatus.ps1

@@ -120,13 +120,16 @@ function Add-GitNumstat($allFiles, $staged) {
 
 		} elseif ($line.StartsWith('warning: ')) {
 			# Add EOL notice
-			$match = $line | Select-String -Pattern 'warning: (\w+) will be replaced by (\w+) in (.*)\.'
-			$fromEol = $match.matches.groups[1]
-			$toEol = $match.matches.groups[2]
-			$fileName = $match.matches.groups[3].Value.Replace('/', '\')
-			$matchingStatus = $allFiles | Where {$_.file -eq $fileName}
-			if ($matchingStatus) {
-				$matchingStatus | Add-Member -NotePropertyName 'lineEndings' -NotePropertyValue "$fromEol -> $toEol" -Force
+			$match = $line | Select-String -Pattern "warning: (?<from>\w+) will be replaced by (?<to>\w+) in (?<file>.*)\.|warning: in the working copy of '(?<file>.*)', (?<from>\w+) will be replaced by (?<to>\w+) the next time Git touches it"
+
+			if ($match) {
+				$fromEol = $match.matches[0].groups['from']
+				$toEol = $match.matches[0].groups['to']
+				$fileName = $match.matches[0].groups['file'].Value.Replace('/', '\')
+				$matchingStatus = $allFiles | Where {$_.file -eq $fileName}
+				if ($matchingStatus) {
+					$matchingStatus | Add-Member -NotePropertyName 'lineEndings' -NotePropertyValue "$fromEol -> $toEol" -Force
+				}
 			}
 		}
 	}