Fix init error in PowerShell strict mode (#233)

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Nushell: errors on 0.33.0.
+- PowerShell: errors when initializing in `StrictMode`.
 
 ## [0.7.2] - 2021-06-10
 

src/shell.rs

@@ -280,7 +280,8 @@ mod tests {
         #[values(false, true)] resolve_symlinks: bool,
     ) {
         let opts = Opts { cmd, hook, echo, resolve_symlinks };
-        let source = Powershell(&opts).render().unwrap();
+        let mut source = "Set-StrictMode -Version latest\n".to_string();
+        Powershell(&opts).render_into(&mut source).unwrap();
 
         Command::new("pwsh")
             .args(&["-NoLogo", "-NonInteractive", "-NoProfile", "-Command", &source])

templates/powershell.txt

@@ -34,8 +34,11 @@ function __zoxide_hook {
 }
 
 # Initialize hook.
-if ($__zoxide_hooked -ne '1') {
-    $__zoxide_hooked = '1'
+{# Initialize $__zoxide_hooked if it does not exist. Removing this will cause
+ # an unset variable error in StrictMode. #}
+$__zoxide_hooked = (Get-Variable __zoxide_hooked -ValueOnly -ErrorAction silentlycontinue)
+if ($__zoxide_hooked -ne 1) {
+    $__zoxide_hooked = 1
 {%- match hook %}
 {%- when InitHook::None %}
     {{ not_configured }}