From b9bb4692a42c8cd8ccb72c17f03a9a125a70accc Mon Sep 17 00:00:00 2001
From: Jonathan Turner <jonathandturner@users.noreply.github.com>
Date: Mon, 4 Jan 2021 19:32:17 +1300
Subject: [PATCH] Allow source during parsing. Hacky but works (#2855)

---
 crates/nu-parser/src/parse.rs | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/crates/nu-parser/src/parse.rs b/crates/nu-parser/src/parse.rs
index e8b132b108..47273c1d6f 100644
--- a/crates/nu-parser/src/parse.rs
+++ b/crates/nu-parser/src/parse.rs
@@ -1786,6 +1786,36 @@ fn parse_call(
                 error,
             );
         }
+    } else if lite_cmd.parts[0].item == "source" {
+        if lite_cmd.parts.len() != 2 {
+            return (
+                None,
+                Some(ParseError::argument_error(
+                    lite_cmd.parts[0].clone(),
+                    ArgumentError::MissingMandatoryPositional("a path for sourcing".into()),
+                )),
+            );
+        }
+        if lite_cmd.parts[1].item.starts_with('$') {
+            return (
+                None,
+                Some(ParseError::mismatch(
+                    "a filepath constant",
+                    lite_cmd.parts[1].clone(),
+                )),
+            );
+        }
+        if let Ok(contents) = std::fs::read_to_string(&lite_cmd.parts[1].item) {
+            let _ = parse(&contents, 0, scope);
+        } else {
+            return (
+                None,
+                Some(ParseError::mismatch(
+                    "a filepath to a source file",
+                    lite_cmd.parts[1].clone(),
+                )),
+            );
+        }
     } else if lite_cmd.parts.len() > 1 {
         // Check if it's a sub-command
         if let Some(signature) = scope.get_signature(&format!(