Replace toml with toml_edit (#1680)

The `toml` crate doesn't support TOML 1.0, but `toml_edit` does. While
there is a plan to [migrate `toml` to be on
`toml_edit`](toml-rs/toml#340), it's not ready
yet and it's very easy to switch back to `toml` when it's ready.

Cargo.toml

@@ -66,7 +66,7 @@ strum = { version = "0.24.1", features = ["strum_macros"] }
 strum_macros = { version = "0.24.3" }
 textwrap = { version = "0.16.0" }
 titlecase = { version = "2.2.1" }
-toml = { version = "0.5.9" }
+toml_edit = { version = "0.17.1", features = ["easy"] }
 walkdir = { version = "2.3.2" }
 
 [target.'cfg(not(target_family = "wasm"))'.dependencies]

flake8_to_ruff/Cargo.toml

@@ -18,7 +18,7 @@ serde = { version = "1.0.147", features = ["derive"] }
 serde_json = { version = "1.0.87" }
 strum = { version = "0.24.1", features = ["strum_macros"] }
 strum_macros = { version = "0.24.3" }
-toml = { version = "0.5.9" }
+toml_edit = { version = "0.17.1", features = ["easy"] }
 
 [dev-dependencies]
 

flake8_to_ruff/src/black.rs

@@ -26,7 +26,7 @@ struct Pyproject {
 
 pub fn parse_black_options<P: AsRef<Path>>(path: P) -> Result<Option<Black>> {
     let contents = std::fs::read_to_string(path)?;
-    Ok(toml::from_str::<Pyproject>(&contents)?
+    Ok(toml_edit::easy::from_str::<Pyproject>(&contents)?
         .tool
         .and_then(|tool| tool.black))
 }

flake8_to_ruff/src/main.rs

@@ -57,7 +57,7 @@ fn main() -> Result<()> {
 
     // Create Ruff's pyproject.toml section.
     let pyproject = converter::convert(&config, black.as_ref(), cli.plugin)?;
-    println!("{}", toml::to_string_pretty(&pyproject)?);
+    println!("{}", toml_edit::easy::to_string_pretty(&pyproject)?);
 
     Ok(())
 }

src/settings/pyproject.rs

@@ -31,13 +31,13 @@ impl Pyproject {
 /// Parse a `ruff.toml` file.
 fn parse_ruff_toml<P: AsRef<Path>>(path: P) -> Result<Options> {
     let contents = fs::read_file(path)?;
-    toml::from_str(&contents).map_err(Into::into)
+    toml_edit::easy::from_str(&contents).map_err(Into::into)
 }
 
 /// Parse a `pyproject.toml` file.
 fn parse_pyproject_toml<P: AsRef<Path>>(path: P) -> Result<Pyproject> {
     let contents = fs::read_file(path)?;
-    toml::from_str(&contents).map_err(Into::into)
+    toml_edit::easy::from_str(&contents).map_err(Into::into)
 }
 
 /// Return `true` if a `pyproject.toml` contains a `[tool.ruff]` section.
@@ -143,17 +143,17 @@ mod tests {
 
     #[test]
     fn deserialize() -> Result<()> {
-        let pyproject: Pyproject = toml::from_str(r#""#)?;
+        let pyproject: Pyproject = toml_edit::easy::from_str(r#""#)?;
         assert_eq!(pyproject.tool, None);
 
-        let pyproject: Pyproject = toml::from_str(
+        let pyproject: Pyproject = toml_edit::easy::from_str(
             r#"
 [tool.black]
 "#,
         )?;
         assert_eq!(pyproject.tool, Some(Tools { ruff: None }));
 
-        let pyproject: Pyproject = toml::from_str(
+        let pyproject: Pyproject = toml_edit::easy::from_str(
             r#"
 [tool.black]
 [tool.ruff]
@@ -209,7 +209,7 @@ mod tests {
             })
         );
 
-        let pyproject: Pyproject = toml::from_str(
+        let pyproject: Pyproject = toml_edit::easy::from_str(
             r#"
 [tool.black]
 [tool.ruff]
@@ -266,7 +266,7 @@ line-length = 79
             })
         );
 
-        let pyproject: Pyproject = toml::from_str(
+        let pyproject: Pyproject = toml_edit::easy::from_str(
             r#"
 [tool.black]
 [tool.ruff]
@@ -323,7 +323,7 @@ exclude = ["foo.py"]
             })
         );
 
-        let pyproject: Pyproject = toml::from_str(
+        let pyproject: Pyproject = toml_edit::easy::from_str(
             r#"
 [tool.black]
 [tool.ruff]
@@ -380,7 +380,7 @@ select = ["E501"]
             })
         );
 
-        let pyproject: Pyproject = toml::from_str(
+        let pyproject: Pyproject = toml_edit::easy::from_str(
             r#"
 [tool.black]
 [tool.ruff]
@@ -438,7 +438,7 @@ ignore = ["E501"]
             })
         );
 
-        assert!(toml::from_str::<Pyproject>(
+        assert!(toml_edit::easy::from_str::<Pyproject>(
             r#"
 [tool.black]
 [tool.ruff]
@@ -447,7 +447,7 @@ line_length = 79
         )
         .is_err());
 
-        assert!(toml::from_str::<Pyproject>(
+        assert!(toml_edit::easy::from_str::<Pyproject>(
             r#"
 [tool.black]
 [tool.ruff]
@@ -456,7 +456,7 @@ select = ["E123"]
         )
         .is_err());
 
-        assert!(toml::from_str::<Pyproject>(
+        assert!(toml_edit::easy::from_str::<Pyproject>(
             r#"
 [tool.black]
 [tool.ruff]