Replace dashes with underscores when using --evaluate-format shell (#3278)

Author: casey

src/justfile.rs

@@ -319,7 +319,7 @@ impl<'src> Justfile<'src> {
                   if binding.export || module.settings.export {
                     print!("export ");
                   }
-                  print!("{}=\"", binding.name);
+                  print!("{}=\"", binding.name.lexeme().replace('-', "_"));
                   for c in binding.value.chars() {
                     if matches!(c, '!' | '"' | '$' | '\\' | '`') {
                       print!("\\");

tests/evaluate.rs

@@ -312,3 +312,20 @@ fn format_shell_variables_are_exported_with_setting() {
     )
     .success();
 }
+
+#[test]
+fn format_shell_dashes_in_variables_are_replaced_with_underscores() {
+  Test::new()
+    .args(["--evaluate", "--evaluate-format", "shell"])
+    .justfile(
+      "
+        foo-bar := 'baz'
+      ",
+    )
+    .stdout(
+      r#"
+        foo_bar="baz"
+      "#,
+    )
+    .success();
+}