Rename tabs to match the repo and branch when in powershell ise

src/PoshGitTypes.ps1

@@ -276,6 +276,13 @@ class PoshGitPromptSettings {
     [string]$DescribeStyle = ''
     [psobject]$WindowTitle = {param($GitStatus, [bool]$IsAdmin) "$(if ($IsAdmin) {'Admin: '})$(if ($GitStatus) {"$($GitStatus.RepoName) [$($GitStatus.Branch)]"} else {Get-PromptPath}) ~ PowerShell $($PSVersionTable.PSVersion) $([IntPtr]::Size * 8)-bit ($PID)"}
 
+    [psobject]$TabTitle = {
+        param($GitStatus, [bool]$IsAdmin)
+        if ($GitStatus) {
+            Get-UniqueTabTitle "$($GitStatus.RepoName) [$($GitStatus.Branch)]"
+        }
+    }
+
     [PoshGitTextSpan]$DefaultPromptPrefix       = '$(Get-PromptConnectionInfo -Format "[{1}@{0}]: ")'
     [PoshGitTextSpan]$DefaultPromptPath         = '$(Get-PromptPath)'
     [PoshGitTextSpan]$DefaultPromptBeforeSuffix = ''

src/TabTitle.ps1

@@ -0,0 +1,108 @@
+$HostSupportsSettingTabTitle = $null
+$OriginalTabTitle = $null
+$GetCurrentTab = $null
+$SetCurrentTab = $null
+$GetExistingTabs = $null
+
+#for support of other MDI IDEs we might add new blocks below.
+#note that the MDI IDEs need to maintain a seperate powershell instance in each document interface
+#for example powergui has tabs for scripts but not tabs for powershell instances (AFAIK)
+$MdiIdeSupportConfig = @(
+    #each block should contain a test to ensure it's only run for the appropriate IDE
+    [scriptblock] {
+        Write-Debug "Testing for PowerShell ISE tab support"
+        if ($psISE) {
+            Write-Debug "PowerShell ISE environment detected setting delegates"
+            $script:GetCurrentTab = [scriptblock]{$psise.CurrentPowerShellTab.DisplayName}
+            $script:SetCurrentTab = [scriptblock]{param($tabName)$psise.CurrentPowerShellTab.DisplayName=$tabName}
+            $script:GetExistingTabs = [scriptblock]{$psISE.PowerShellTabs | Select-Object -ExpandProperty DisplayName}
+            Write-Debug "Setting HostSupportsSettingTabTitle to true"
+            $script:HostSupportsSettingTabTitle = $true
+        }
+    }
+)
+
+function Test-TabTitleIsWriteable {
+    if ($null -eq $script:HostSupportsSettingTabTitle) {
+        # check to see if we're in a tabbed IDE and test to see if we can set tab names
+        try {
+            #run the config blocks to set up delegate calls to IDE tab naming methods
+            foreach ($item in $script:MdiIdeSupportConfig) {
+                Invoke-Command $item
+            }
+
+            #if HostSupportsSettingTabTitle is still null then we must not be in an MDI IDE
+            if ($null -eq $script:HostSupportsSettingTabTitle) {
+                $script:HostSupportsSettingTabTitle = $false
+            } else {
+                Write-Debug "HostSupportsSettingTabTitle: $script:HostSupportsSettingTabTitle"
+                Write-Debug "Testing tab renaming actually works"
+                #cache the original tab name and test naming works
+                $script:OriginalTabTitle = & $script:GetCurrentTab
+                $testTitle = [System.Guid]::NewGuid().ToString()
+                Write-Debug "Setting tab title from $($script:OriginalTabTitle) to $testTitle"
+                & $script:SetCurrentTab $testTitle
+                Write-Debug "Setting tab title back to $($script:OriginalTabTitle)"
+                & $script:SetCurrentTab $script:OriginalTabTitle
+                Write-Debug "It works"
+            }
+            Write-Debug "HostSupportsSettingTabTitle: $script:HostSupportsSettingTabTitle"
+            Write-Debug "OriginalTabTitle: $script:OriginalTabTitle"
+        }
+        catch {
+            $script:OriginalTabTitle = $null
+            $script:HostSupportsSettingTabTitle = $false
+            Write-Debug "HostSupportsSettingTabTitle error: $_"
+        }
+    }
+    return $script:HostSupportsSettingTabTitle
+}
+
+function Reset-TabTitle {
+    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseShouldProcessForStateChangingFunctions", "")]
+    param()
+    $settings = $global:GitPromptSettings
+
+    # Revert to original TabTitle, but only if posh-git is currently configured to set it
+    if ($HostSupportsSettingTabTitle -and $OriginalTabTitle -and $settings.TabTitle) {
+        Write-Debug "Resetting TabTitle: '$OriginalTabTitle'"
+        & $script:SetCurrentTab $OriginalTabTitle
+    }
+}
+
+function Set-TabTitle {
+    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSUseShouldProcessForStateChangingFunctions", "")]
+    param($GitStatus, $IsAdmin)
+    $settings = $global:GitPromptSettings
+
+    # Update the host's TabTitle if
+    #  host supports it
+    #  user has not disabled $GitPromptSettings.TabTitle
+    #  we are in a git repo
+    if ($settings.TabTitle -and (Test-TabTitleIsWriteable) -and $settings.TabTitle -is [scriptblock]) {
+        try {
+            if ($GitStatus) {
+                # ensure results returned by scriptblock are flattened into a string
+                $tabTitleText = "$(& $settings.TabTitle $GitStatus $IsAdmin)"
+                Write-Debug "Setting TabTitle: $tabTitleText"
+                & $script:SetCurrentTab "$tabTitleText"
+            } else {
+                Reset-TabTitle
+            }
+        }
+        catch {
+            Write-Debug "Error occurred during evaluation of `$GitPromptSettings.TabTitle: $_"
+        }
+    }
+}
+
+function Get-UniqueTabTitle {
+    param($tabNameRoot, $Format="{0} {1}")
+    $tabNumber = 1
+    $existingTabNames = & $script:GetExistingTabs
+    $uniqueTabName = $tabNameRoot
+    while ($existingTabNames -contains $uniqueTabName) {
+      $uniqueTabName = $Format -f $tabNameRoot,$tabNumber++
+    }
+    return $uniqueTabName
+}

src/posh-git.psm1

@@ -6,6 +6,7 @@ param([switch]$ForcePoshGitPrompt)
 . $PSScriptRoot\Utils.ps1
 . $PSScriptRoot\AnsiUtils.ps1
 . $PSScriptRoot\WindowTitle.ps1
+. $PSScriptRoot\TabTitle.ps1
 . $PSScriptRoot\PoshGitTypes.ps1
 . $PSScriptRoot\GitUtils.ps1
 . $PSScriptRoot\GitPrompt.ps1
@@ -92,6 +93,7 @@ $GitPromptScriptBlock = {
 
     # This has to be *after* the call to Write-VcsStatus, which populates $global:GitStatus
     Set-WindowTitle $global:GitStatus $IsAdmin
+    Set-TabTitle $global:GitStatus $IsAdmin
 
     # If prompt timing enabled, write elapsed milliseconds
     if ($settings.DefaultPromptEnableTiming) {
@@ -141,6 +143,7 @@ $ExecutionContext.SessionState.Module.OnRemove = {
     $global:VcsPromptStatuses = $global:VcsPromptStatuses | Where-Object { $_ -ne $PoshGitVcsPrompt }
 
     Reset-WindowTitle
+    Reset-TabTitle
 
     # Check if the posh-git prompt function itself has been replaced. If so, do not restore the prompt function
     $promptDef = if ($funcInfo = Get-Command prompt -ErrorAction SilentlyContinue) { $funcInfo.Definition }