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extern crate regex;
extern crate ordermap;
mod ini;
use regex::{Regex, Captures};
use ordermap::OrderMap;
use std::path::{Path, PathBuf};
use std::error::Error;
fn crawl_paths(path: &Path, conffile: &str) -> Result<Vec<PathBuf>, Box<Error>> {
let mut path = if path.exists() {
path.canonicalize()?
} else {
path.to_path_buf()
};
let mut result = vec![];
while path.parent().is_some() {
let mut adjacent_file = path.clone();
adjacent_file.set_file_name(conffile);
path.pop();
if !adjacent_file.exists() {
continue;
}
result.push(adjacent_file);
}
return Ok(result);
}
fn has_imbalanced_braces(text: &str) -> bool {
let mut depth = 0i32;
let escaped_brace_regex = Regex::new(r"\\(\{|\})").unwrap();
let text = escaped_brace_regex.replace_all(text, "");
for c in text.chars() {
if c == '{' {
depth += 1;
} else if c == '}' {
depth -= 1;
if depth < 0 {
return true;
}
}
}
return depth != 0;
}
fn translate_alternation(caps: &Captures) -> String {
if has_imbalanced_braces(&caps[1]) {
return format!("{{{}}}", &caps[1].replace("{", r"\{").replace("}", r"\}"));
}
let padded_cases = format!(",{},", &caps[1]);
let quantifier = if padded_cases.contains(",,") { "?" } else { "" };
let cases = caps[1].replace(",", "|");
let escaped_comma_regex = Regex::new(r"(^|[^\\])\\\|").unwrap();
let cases = escaped_comma_regex.replace(&cases, "$1,");
format!("(?:{}){}", cases, quantifier)
}
fn glob_match(pattern: &String, candidate: &String) -> bool {
let orig_had_slash = pattern.contains('/');
let pattern = pattern.replace(".", r"\.");
let unmatched_open_bracket_regex = Regex::new(r"\[([^\]]*)$").unwrap();
let pattern = unmatched_open_bracket_regex.replace_all(&pattern, r"\[$1")
.to_string();
let pattern = pattern.replace("?", ".");
let bracketed_slash_regex = Regex::new(r"\[(.*/.*)\]").unwrap();
let pattern = bracketed_slash_regex.replace_all(&pattern, r"\[$1\]");
let pattern = pattern.replace("*", "[^/]*");
let pattern = pattern.replace("[^/]*[^/]*", ".*");
let numeric_range_regex = Regex::new(r"\{(-?\d+\\\.\\\.-?\d+)\}").unwrap();
let has_numeric_ranges = numeric_range_regex.is_match(&pattern);
let numeric_ranges: Vec<_> = numeric_range_regex.captures_iter(&pattern).collect();
let pattern = numeric_range_regex.replace_all(&pattern, r"(0|-?[1-9]\d*)");
let pattern = pattern.replace("/.*/", "(?:/.*)?/");
let pattern = pattern.replace("[!", "[^");
let fake_alternation_regex = Regex::new(r"\{([^,]+)\}").unwrap();
let pattern = fake_alternation_regex.replace_all(&pattern, r"\{$1\}").to_string();
let mut pattern = pattern;
let alternation_regex = Regex::new(r"\{(([^\}].*)?(,|\|)(.*[^\\])?)\}").unwrap();
while alternation_regex.is_match(&pattern) {
pattern = alternation_regex.replace_all(&pattern, translate_alternation).to_string();
}
let leading_slash_regex = Regex::new(r"^/").unwrap();
let pattern = leading_slash_regex.replace(&pattern, "^");
let unescaped_brace_regex = Regex::new(r"(^|[^\\])(\{|\})").unwrap();
let pattern = unescaped_brace_regex.replace_all(&pattern, r"$1\$2");
let pattern = unescaped_brace_regex.replace_all(&pattern, r"$1\$2");
let pattern = pattern.replace("||", "|");
let pattern = pattern.replace("(?:|", "(?:");
let pattern = pattern.replace("|)", ")");
let leading_expr = if orig_had_slash {
""
} else {
"(?:.*?/)?"
};
let pattern = format!("^{}{}$", leading_expr, pattern);
let final_regex = Regex::new(&pattern).unwrap();
if has_numeric_ranges && final_regex.is_match(candidate) {
let caps: Vec<_> = final_regex.captures_iter(candidate).collect();
for (num, range_spec) in caps.iter().zip(numeric_ranges.iter()) {
if let Ok(num) = num.get(1).unwrap().as_str().parse::<i32>() {
let ends: Vec<Result<i32, _>> = range_spec.get(1).unwrap().as_str().split(r"\.\.").map(|x| x.parse()).collect();
if let Ok(min) = ends[0] {
if let Ok(max) = ends[1] {
if min > num || num > max {
return false;
}
} else {
return false;
}
} else {
return false;
}
} else {
return false;
}
}
return true;
}
return final_regex.is_match(candidate);
}
fn parse_config(target: &Path, conf_file: &Path) -> Result<OrderMap<String, String>, Box<Error>> {
let context = conf_file.parent().unwrap();
let ini_data = ini::Ini::load_from_file(conf_file)?;
let mut result = OrderMap::new();
if let Some(general) = ini_data.section::<String>(None) {
if let Some(root) = general.get("root") {
if root.to_lowercase() == "true" {
result.insert("root".to_string(), "true".to_string());
}
}
}
let target = target.strip_prefix(&context)?;
let target = target.as_os_str().to_os_string().into_string().unwrap();
#[cfg(windows)]
let target = target.replace("\\", "/");
for (label, data) in ini_data.iter() {
if let Some(ref label) = *label {
if label.len() > 4096 {
continue;
}
if glob_match(label, &target) {
for (k, v) in data.iter() {
result.insert(k.clone(), v.clone());
}
}
}
}
if let Some(indent_style) = result.clone().get("indent_style") {
if indent_style == "tab" {
if result.get("indent_size").is_none() {
result.insert("indent_size".to_string(), "tab".to_string());
}
}
}
if let Some(indent_size) = result.clone().get("indent_size") {
if indent_size != "tab" {
if result.get("tab_width").is_none() {
result.insert("tab_width".to_string(), indent_size.clone());
}
} else {
if let Some(tab_width) = result.clone().get("tab_width") {
result.insert("indent_size".to_string(), tab_width.clone());
}
}
}
Ok(result)
}
fn is_known_key(key: &str) -> bool {
let known_keys = ["indent_style",
"indent_size",
"tab_width",
"end_of_line",
"charset",
"trim_trailing_whitespace",
"insert_final_newline"];
known_keys.contains(&key)
}
pub fn get_config(file_path: &Path) -> Result<OrderMap<String, String>, Box<Error>> {
get_config_conffile(file_path, ".editorconfig")
}
pub fn get_config_conffile(file_path: &Path,
conffile: &str)
-> Result<OrderMap<String, String>, Box<Error>> {
let paths = crawl_paths(file_path, conffile)?;
let mut result = OrderMap::new();
for conf_path in paths {
let options = parse_config(file_path, &conf_path)?;
let old_result = result;
result = OrderMap::new();
for (k, v) in options.iter() {
let k = k.to_lowercase();
let v = if is_known_key(&k) {
v.to_lowercase()
} else {
v.clone()
};
if k.len() > 50 || v.len() > 255 {
continue;
}
if !result.contains_key(&k) && k != "root" {
result.insert(k, v);
}
}
for (k, v) in old_result.iter() {
result.insert(k.clone(), v.clone());
}
if let Some(root) = options.get("root") {
if root.to_lowercase() == "true" {
break;
}
}
}
return Ok(result);
}
#[cfg(test)]
mod tests {
use super::*;
use std::path::Path;
#[test]
fn works_with_multi_level_directories() {
let path = Path::new("./test_files/multi_level/foo/bar/file.txt");
let path = path.canonicalize().unwrap();
let cfg = get_config(&path).unwrap();
let mut map = OrderMap::new();
map.insert("end_of_line".to_owned(), "lf".to_owned());
map.insert("insert_final_newline".to_owned(), "true".to_owned());
assert_eq!(cfg, map);
}
#[test]
fn get_editorconfig_for_non_existing_file() {
assert!(get_config(Path::new("./test_files/diocano")).is_ok());
}
}