use std::path::{PathBuf, MAIN_SEPARATOR};
use anyhow::{bail, Result};
const LUNE_COMMENT_PREFIX: &str = "-->";
pub fn find_luau_file_path(path: &str) -> Option<PathBuf> {
let file_path = PathBuf::from(path);
if let Some(ext) = file_path.extension() {
match ext {
e if e == "lua" || e == "luau" && file_path.exists() => Some(file_path),
_ => None,
}
} else {
let file_path_lua = PathBuf::from(path).with_extension("lua");
if file_path_lua.exists() {
Some(file_path_lua)
} else {
let file_path_luau = PathBuf::from(path).with_extension("luau");
if file_path_luau.exists() {
Some(file_path_luau)
} else {
None
}
}
}
}
pub fn find_parse_file_path(path: &str) -> Result<PathBuf> {
let parsed_file_path = find_luau_file_path(path)
.or_else(|| find_luau_file_path(&format!("lune{MAIN_SEPARATOR}{path}")))
.or_else(|| find_luau_file_path(&format!(".lune{MAIN_SEPARATOR}{path}")));
if let Some(file_path) = parsed_file_path {
if file_path.exists() {
Ok(file_path)
} else {
bail!("File does not exist at path: '{}'", path)
}
} else {
bail!("Invalid file path: '{}'", path)
}
}
pub fn parse_lune_description_from_file(contents: &str) -> Option<String> {
let mut comment_lines = Vec::new();
for line in contents.lines() {
if let Some(stripped) = line.strip_prefix(LUNE_COMMENT_PREFIX) {
comment_lines.push(stripped);
} else {
break;
}
}
if comment_lines.is_empty() {
None
} else {
let shortest_indent = comment_lines.iter().fold(usize::MAX, |acc, line| {
let first_alphanumeric = line.find(char::is_alphanumeric).unwrap();
acc.min(first_alphanumeric)
});
let unindented_lines = comment_lines
.iter()
.map(|line| &line[shortest_indent..])
.collect();
Some(unindented_lines)
}
}