support powershell env

emsdk.ps1

@@ -0,0 +1,37 @@
+$ScriptDirectory = Split-Path -parent $PSCommandPath
+
+$PythonLocations = $(
+    "python\2.7.5.3_64bit\python.exe",
+    "python\2.7.5.3_32bit\python.exe",
+    "python\2.7.5_64bit\python.exe",
+    "python\2.7.5.1_32bit\python.exe"
+)
+
+# Find python from an explicit location relative to the Emscripten SDK.
+foreach ($Location in $PythonLocations) {
+    $FullLocation = Join-Path $ScriptDirectory $Location
+    if (Test-Path $FullLocation) {
+        $EMSDK_PY = $FullLocation
+        break
+    }
+}
+
+# As a last resort, access from PATH.
+if (-Not $EMSDK_PY) {
+    $EMSDK_PY = "python"
+}
+
+# Tell EMSDK to create environment variable setter as a .ps1 file
+$env:EMSDK_POWERSHELL = 1
+
+& $EMSDK_PY "$ScriptDirectory/emsdk" $args
+
+# python is not able to set environment variables to the parent calling process, so
+# therefore have it craft a .ps1 file, which we invoke after finishing python execution,
+# to set up the environment variables
+if (Test-Path "emsdk_set_env.ps1") {
+    & emsdk_set_env.ps1
+    Remove-Item emsdk_set_env.ps1
+}
+
+Remove-Item Env:\EMSDK_POWERSHELL