editor_config/
parser.rs

1use ini::Ini;
2use std::collections::HashMap;
3use std::fs;
4use std::str::FromStr;
5
6pub struct EditorConfig {
7    pub config: HashMap<String, HashMap<String, String>>,
8}
9
10impl EditorConfig {
11    pub fn from_file(file_path: &str) -> Result<Self, String> {
12        let contents: String = fs::read_to_string(file_path).map_err(|e| e.to_string())?;
13        EditorConfig::from_str(&contents)
14    }
15    pub fn get_property(&self, section: &str, property: &str) -> Option<&String> {
16        self.config
17            .get(section)
18            .and_then(|props| props.get(property))
19            .and_then(|value| validate_property(property, value))
20    }
21}
22
23// NOTE: invalid properties should never error.
24// https://github.com/editorconfig/editorconfig/wiki/How-to-create-an-EditorConfig-plugin#handling-unsupported-editorconfig-properties
25fn validate_property<'a>(property: &str, value: &'a String) -> Option<&'a String> {
26    match property {
27        "indent_style" => match value.as_str() {
28            "tab" | "space" => Some(value),
29            _ => None,
30        },
31        "indent_size" => match value.as_str() {
32            "tab" => Some(value),
33            _ => value.parse::<u32>().ok().map(|_| value),
34        },
35        "tab_width" => value.parse::<u32>().ok().map(|_| value),
36        "end_of_line" => match value.as_str() {
37            "lf" | "cr" | "crlf" => Some(value),
38            _ => None,
39        },
40        "charset" => match value.as_str() {
41            "latin1" | "utf-8" | "utf-8-bom" | "utf-16be" | "utf-16le" => Some(value),
42            _ => None,
43        },
44        "trim_trailing_whitespace" | "insert_final_newline" | "root" => {
45            value.parse::<bool>().ok().map(|_| value)
46        }
47        "max_line_length" => match value.as_str() {
48            "off" => Some(value),
49            _ => value.parse::<u32>().ok().map(|_| value),
50        },
51        _ => Some(value),
52    }
53}
54
55impl FromStr for EditorConfig {
56    type Err = String;
57
58    fn from_str(s: &str) -> Result<Self, Self::Err> {
59        let parsed = Ini::load_from_str(s).map_err(|e| e.to_string())?;
60        let mut config = HashMap::new();
61        for (section, properties) in parsed.iter() {
62            let section_name = section.as_ref().map_or("*".to_string(), |s| s.to_string());
63            let section_props = properties
64                .iter()
65                .map(|(key, value)| (key.to_string(), value.to_string()))
66                .collect();
67            config.insert(section_name, section_props);
68        }
69
70        Ok(EditorConfig { config })
71    }
72}
editor_config/parser.rs

editor_config/
parser.rs
