refactor(toml): Move the parse fn onto ScriptSource

src/cargo/util/toml/embedded.rs

@@ -21,7 +21,7 @@ pub(super) fn expand_manifest(
     path: &std::path::Path,
     gctx: &GlobalContext,
 ) -> CargoResult<String> {
-    let source = split_source(content)?;
+    let source = ScriptSource::parse(content)?;
     if let Some(frontmatter) = source.frontmatter {
         match source.info {
             Some("cargo") | None => {}
@@ -196,8 +196,9 @@ struct ScriptSource<'s> {
     content: &'s str,
 }
 
-fn split_source(input: &str) -> CargoResult<ScriptSource<'_>> {
-    let mut source = ScriptSource {
+impl<'s> ScriptSource<'s> {
+    fn parse(input: &'s str) -> CargoResult<Self> {
+        let mut source = Self {
             shebang: None,
             info: None,
             frontmatter: None,
@@ -278,6 +279,7 @@ fn split_source(input: &str) -> CargoResult<ScriptSource<'_>> {
 
         Ok(source)
     }
+}
 
 #[cfg(test)]
 mod test_expand {
@@ -291,7 +293,7 @@ mod test_expand {
     fn assert_source(source: &str, expected: impl IntoData) {
         use std::fmt::Write as _;
 
-        let actual = match split_source(source) {
+        let actual = match ScriptSource::parse(source) {
             Ok(actual) => actual,
             Err(err) => panic!("unexpected err: {err}"),
         };
@@ -497,7 +499,7 @@ content: "\nfn main() {}"
     #[test]
     fn split_too_few_dashes() {
         assert_err(
-            split_source(
+            ScriptSource::parse(
                 r#"#!/usr/bin/env cargo
 --
 [dependencies]
@@ -513,7 +515,7 @@ fn main() {}
     #[test]
     fn split_mismatched_dashes() {
         assert_err(
-            split_source(
+            ScriptSource::parse(
                 r#"#!/usr/bin/env cargo
 ---
 [dependencies]
@@ -529,7 +531,7 @@ fn main() {}
     #[test]
     fn split_missing_close() {
         assert_err(
-            split_source(
+            ScriptSource::parse(
                 r#"#!/usr/bin/env cargo
 ---
 [dependencies]