Add Execution Policy setting to Powershell based shell plugins (#1505)

Signed-off-by: Erwan Leroy <herronelou@gmail.com>

src/rezplugins/shell/_utils/powershell_base.py

@@ -202,6 +202,12 @@ def _record_shell(ex, files, bind_rez=True, print_msg=False):
         # Suppresses copyright message of PowerShell and pwsh
         cmd += ["-NoLogo"]
 
+        # Powershell execution policy overrides
+        # Prevent injections/mistakes by ensuring policy value only contains letters.
+        execution_policy = self.settings.execution_policy
+        if execution_policy and execution_policy.isalpha():
+            cmd += ["-ExecutionPolicy", execution_policy]
+
         # Generic form of sourcing that works in powershell and pwsh
         cmd += ["-File", target_file]
 

src/rezplugins/shell/rezconfig

@@ -27,11 +27,13 @@ powershell:
     prompt: '> $ '
     additional_pathext: ['.PY']
     executable_fullpath: null
+    execution_policy: null
 
 pwsh:
     prompt: '> $ '
     additional_pathext: ['.PY']
     executable_fullpath: null
+    execution_policy: null
 
 gitbash:
     prompt: '>'