Add windows templates for powershell and batch

README.md

@@ -120,6 +120,13 @@ available from the [MSYS2][] and [Cygwin][] environments.
 [msys2]:   https://msys2.github.io/
 [cygwin]:  https://www.cygwin.com/
 
+There are also wrapper templates for [powershell][go-template-ps1] and
+[batch][go-template-cmd] so that the `./go` command can be run directly from
+those shells.
+
+[go-template-ps1]: https://github.com/mbland/go-script-bash/blob/master/go-template.ps1
+[go-template-cmd]: https://github.com/mbland/go-script-bash/blob/master/go-template.cmd
+
 #### Why not use tool X instead?
 
 Of course there are many common tools that may be used for managing project
@@ -256,6 +263,10 @@ You may rename this file whatever you wish (i.e. it doesn't have to be named
 `./go`), update its documentation and variables to fit your project, and check
 it into your project repository. See the `go-template` comments for details.
 
+If windows shell compatibility is desired, then you can also download the
+`go-template.ps1` and `go-template.cmd` files. Place them next to your `go` file
+with names to match (e.g. `go.ps1` and `go.cmd`).
+
 If you'd prefer to download a copy of the framework and check it into your
 sources, versioned archives are available from the [go-script-bash Releases
 page][go-rel]. The archives for the current release are:

go-template.cmd

@@ -0,0 +1 @@
+PowerShell.exe -ExecutionPolicy Bypass -File "%~dpn0.ps1" %*

go-template.ps1

@@ -0,0 +1,29 @@
+function Find-Bash {
+  @(
+    , 'bash' # PATH
+    , "${ENV:ProgramFiles}/Git/bin/bash" # Git
+    , "${ENV:SystemDrive}/msys64/usr/bin/bash" # MSYS2
+    , "${ENV:SystemDrive}/cygwin64/bin/bash" # Cygwin
+    , "${ENV:LocalppData}/Lxss/bin/bash" # Linux Subsystem
+  ) | Where-Object { Get-Command $_ -ErrorAction SilentlyContinue } `
+    | ForEach-Object { (Get-Command $_).Source } `
+    | Select-Object -First 1
+}
+
+function Execute-Bash($Bash_Path, $Command, $Arguments) {
+  If ([System.IO.Path]::IsPathRooted($Command)) {
+    $Command = Resolve-Path -Relative $Command
+  }
+
+  $Command = $Command -Replace '\\', '/'
+
+  If($Bash_Path -and (Test-Path "${Bash_Path}")) {
+    &"${Bash_Path}" -c "${Command} ${Arguments}"
+  } Else {
+    Throw [System.IO.FileNotFoundException] 'Could not find bash, perhaps it is not installed'
+  }
+}
+
+$go_path = $MyInvocation.MyCommand.Path -replace '\.ps1$'
+
+Execute-Bash (Find-Bash) $go_path $args