add support of multi-name in section

Closes #3

src/main.rs

@@ -17,7 +17,6 @@
 
 mod cli;
 
-use std::path::Path;
 use std::{
     fs::File,
     io::{BufWriter, Write},
@@ -28,30 +27,33 @@ use clap::Parser;
 fn main() -> Result<(), Error> {
     let cli = cli::Args::parse();
 
-    change_env_layout(&cli.file, &cli.section_names)?;
+    change_env_layout(&cli)?;
 
     Ok(())
 }
 
-fn change_env_layout(file: &Path, section_names: &[String]) -> Result<(), Error> {
+fn change_env_layout(args: &cli::Args) -> Result<(), Error> {
-    let content = std::fs::read_to_string(file).map_err(|_| Error::OpenFile)?;
+    let content = std::fs::read_to_string(&args.file).map_err(|_| Error::OpenFile)?;
 
-    let mut writer = File::create(file)
+    let mut writer = File::create(&args.file)
         .map_err(|_| Error::OpenFile)
         .map(BufWriter::new)?;
 
-    let mut current_section_name: Option<String> = None;
+    let mut current_section_name: Option<Vec<String>> = None;
 
     for line in content.split_inclusive('\n') {
         let new_line = if is_section_end(line) {
             current_section_name = None;
             line.to_string()
         } else if let Some(section_info) = line.strip_prefix("### ") {
-            current_section_name = section_info.split_whitespace().next().map(String::from);
+            current_section_name = section_info
+                .split_whitespace()
+                .next()
+                .map(|r| r.split(',').map(str::trim).map(String::from).collect());
             line.to_string()
         } else if let Some(cur_name) = current_section_name.clone() {
             let trimmed_line = line.trim_start_matches(['#', ' ']);
-            if section_names.contains(&cur_name) {
+            if args.section_names.iter().any(|sn| cur_name.contains(sn)) {
                 String::from(trimmed_line)
             } else {
                 format!("# {}", trimmed_line)