Request path completions from nearest / or \

Fixes microsoft#223414

src/vs/workbench/contrib/terminal/browser/media/shellIntegration.ps1

@@ -245,6 +245,17 @@ function Send-Completions {
  $cursorIndex = $newCursorIndex
  }
  }
+ # If it contains `/` or `\`, get completions from the nearest `/` or `\` such that file
+ # completions are consistent regardless of where it was requested
+ elseif ($lastWord -match '[/\\]') {
+ $lastSlashIndex = $completionPrefix.LastIndexOfAny(@('/', '\'))
+ if ($lastSlashIndex -ne -1 && $lastSlashIndex -lt $cursorIndex) {
+ $newCursorIndex = $lastSlashIndex + 1
+ $completionPrefix = $completionPrefix.Substring(0, $newCursorIndex)
+ $prefixCursorDelta = $cursorIndex - $newCursorIndex
+ $cursorIndex = $newCursorIndex
+ }
+ }
 
  # Get completions using TabExpansion2
  $completions = TabExpansion2 -inputScript $completionPrefix -cursorColumn $cursorIndex
@@ -293,6 +304,17 @@ function Send-Completions {
  # If there is no space, get completions using CompletionCompleters as it gives us more
  # control and works on the empty string
  else {
+ # If it contains `/` or `\`, get completions from the nearest `/` or `\` such that file
+ # completions are consistent regardless of where it was requested
+ if ($completionPrefix -match '[/\\]') {
+ $lastSlashIndex = $completionPrefix.LastIndexOfAny(@('/', '\'))
+ if ($lastSlashIndex -ne -1 && $lastSlashIndex -lt $cursorIndex) {
+ $newCursorIndex = $lastSlashIndex + 1
+ $completionPrefix = $completionPrefix.Substring(0, $newCursorIndex)
+ $prefixCursorDelta = $cursorIndex - $newCursorIndex
+ $cursorIndex = $newCursorIndex
+ }
+ }
  # Note that CompleteCommand isn't included here as it's expensive
  $completions = $(
  # Add trailing \ for directories so behavior aligns with TabExpansion2