getpunk script fix rename/move on windows

getpunk.cmd

@@ -920,6 +920,7 @@ $launchdir      = Get-Location #store original CWD
 $scriptfolder   = Resolve-Path (Split-Path -Path $PSCommandPath -Parent)
 $punkfolder = ""
 $scriptroot = "$([System.IO.Path]::GetFileNameWithoutExtension($PSCommandPath))"
+$env:Path = [System.Environment]::GetEnvironmentVariable("Path","Machine") + ";" + [System.Environment]::GetEnvironmentVariable("Path","User")
 
 if (-not (Get-Command "git" -ErrorAction SilentlyContinue)) {
     Write-Host "The git command doesn't seem to be available. Will attempt to install using winget."
@@ -1018,10 +1019,12 @@ if (-not(Test-Path -Path (Join-Path -Path $punkfolder -ChildPath ".git") -PathTy
 git fetch origin
 if (($launchdir.Path) -eq ($scriptfolder.Path)) {
     if (Test-Path -Path "${scriptroot}.cmd") {
-        Rename-Item -Path "${scriptroot}.cmd" -NewName "${scriptroot}.cmd.lastrun" -Force
+        #rename-item won't allow overwriting existing target file
+        Move-Item -Path "${scriptroot}.cmd" -Destination "${scriptroot}.cmd.lastrun" -Force
     }
 }
 git pull $git_upstream master
+git checkout $scriptroot.cmd
 git branch --set-upstream-to=origin/master master
 
 Set-Location $launchdir #restore original CWD

src/scriptapps/getpunk.bash

@@ -81,6 +81,7 @@ if [[ "$punkfolder" == "$scriptdir" ]]; then
     fi
 fi
 git pull $git_upstream master
+git checkout $scriptroot.cmd
 git branch --set-upstream-to=origin/master master
 
 cd $launchdir #restore original CWD

src/scriptapps/getpunk.ps1

@@ -11,6 +11,7 @@ $launchdir      = Get-Location #store original CWD
 $scriptfolder   = Resolve-Path (Split-Path -Path $PSCommandPath -Parent)
 $punkfolder = ""
 $scriptroot = "$([System.IO.Path]::GetFileNameWithoutExtension($PSCommandPath))"
+$env:Path = [System.Environment]::GetEnvironmentVariable("Path","Machine") + ";" + [System.Environment]::GetEnvironmentVariable("Path","User")
 
 if (-not (Get-Command "git" -ErrorAction SilentlyContinue)) {
     Write-Host "The git command doesn't seem to be available. Will attempt to install using winget."
@@ -109,10 +110,12 @@ if (-not(Test-Path -Path (Join-Path -Path $punkfolder -ChildPath ".git") -PathTy
 git fetch origin
 if (($launchdir.Path) -eq ($scriptfolder.Path)) {
     if (Test-Path -Path "${scriptroot}.cmd") {
-        Rename-Item -Path "${scriptroot}.cmd" -NewName "${scriptroot}.cmd.lastrun" -Force
+        #rename-item won't allow overwriting existing target file
+        Move-Item -Path "${scriptroot}.cmd" -Destination "${scriptroot}.cmd.lastrun" -Force
     }
 }
 git pull $git_upstream master
+git checkout $scriptroot.cmd
 git branch --set-upstream-to=origin/master master
 
 Set-Location $launchdir #restore original CWD