Fix powershell shebang, closes #825

src/recipe.rs

@@ -107,6 +107,18 @@ impl<'src, D> Recipe<'src, D> {
         return Ok(());
       }
 
+      let shebang_line = evaluated_lines
+        .first()
+        .ok_or_else(|| RuntimeError::Internal {
+          message: "evaluated_lines was empty".to_owned(),
+        })?;
+
+      let Shebang {
+        interpreter,
+        argument,
+      } = Shebang::new(shebang_line).ok_or_else(|| RuntimeError::Internal {
+        message: format!("bad shebang line: {}", shebang_line),
+      })?;
       let tmp = tempfile::Builder::new()
         .prefix("just")
         .tempdir()
@@ -115,7 +127,13 @@ impl<'src, D> Recipe<'src, D> {
           io_error: error,
         })?;
       let mut path = tmp.path().to_path_buf();
-      path.push(self.name());
+      let suffix = if interpreter.ends_with("powershell") || interpreter.ends_with("powershell.exe")
+      {
+        ".ps1"
+      } else {
+        ""
+      };
+      path.push(format!("{}{}", self.name(), suffix));
       {
         let mut f = fs::File::create(&path).map_err(|error| RuntimeError::TmpdirIoError {
           recipe:   self.name(),
@@ -152,19 +170,6 @@ impl<'src, D> Recipe<'src, D> {
         io_error: error,
       })?;
 
-      let shebang_line = evaluated_lines
-        .first()
-        .ok_or_else(|| RuntimeError::Internal {
-          message: "evaluated_lines was empty".to_owned(),
-        })?;
-
-      let Shebang {
-        interpreter,
-        argument,
-      } = Shebang::new(shebang_line).ok_or_else(|| RuntimeError::Internal {
-        message: format!("bad shebang line: {}", shebang_line),
-      })?;
-
       // create a command to run the script
       let mut command = Platform::make_shebang_command(
         &path,

tests/lib.rs

@@ -22,6 +22,7 @@ mod positional_arguments;
 mod quiet;
 mod readme;
 mod search;
+mod shebang;
 mod shell;
 mod string;
 mod working_directory;

tests/shebang.rs

@@ -0,0 +1,21 @@
+#[cfg(windows)]
+test! {
+  name:     powershell,
+  justfile: r#"
+default:
+  #!powershell
+  Write-Host Hello-World
+"#,
+  stdout: "Hello-World\n",
+}
+
+#[cfg(windows)]
+test! {
+  name:     powershell_exe,
+  justfile: r#"
+default:
+  #!powershell.exe
+   Write-Host Hello-World
+"#,
+  stdout: "Hello-World\n",
+}