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| 1 | +use std::{env, fs, process}; |
| 2 | + |
| 3 | +use anyhow::Result; |
| 4 | +use ignore::Walk; |
| 5 | +use regex::Regex; |
| 6 | + |
| 7 | +fn main() -> Result<()> { |
| 8 | + let mut args = env::args(); |
| 9 | + if args.len() == 1 { |
| 10 | + eprintln!("error: expected root Markdown directory as CLI argument"); |
| 11 | + process::exit(1); |
| 12 | + } |
| 13 | + let root_dir = args.nth(1).unwrap(); |
| 14 | + for result in Walk::new(root_dir) { |
| 15 | + let entry = result?; |
| 16 | + if entry.file_type().expect("no stdin").is_dir() { |
| 17 | + continue; |
| 18 | + } |
| 19 | + let path = entry.path(); |
| 20 | + if let Some(extension) = path.extension() { |
| 21 | + if extension != "md" { |
| 22 | + continue; |
| 23 | + } |
| 24 | + } else { |
| 25 | + continue; |
| 26 | + } |
| 27 | + let old = fs::read_to_string(path)?; |
| 28 | + let new = comply(&old)?; |
| 29 | + if new != old { |
| 30 | + fs::write(path, new)?; |
| 31 | + } |
| 32 | + } |
| 33 | + Ok(()) |
| 34 | +} |
| 35 | + |
| 36 | +fn comply(content: &str) -> Result<String> { |
| 37 | + let content: Vec<_> = content.lines().map(|line| line.to_owned()).collect(); |
| 38 | + let mut new_content = content.clone(); |
| 39 | + let mut new_n = 0; |
| 40 | + let mut in_code_block = false; |
| 41 | + let split_re = Regex::new(r"(\.|\?|;|!)\s+")?; |
| 42 | + let ignore_re = Regex::new(r"(\d\.|\-|\*|r\?)\s+")?; |
| 43 | + for (n, line) in content.iter().enumerate() { |
| 44 | + if n != 0 { |
| 45 | + new_n += 1; |
| 46 | + } |
| 47 | + if ignore_re.is_match(line) { |
| 48 | + continue; |
| 49 | + } |
| 50 | + // headings |
| 51 | + if line.starts_with('#') { |
| 52 | + continue; |
| 53 | + } |
| 54 | + let line = line.trim_end(); |
| 55 | + if line.is_empty() { |
| 56 | + continue; |
| 57 | + } |
| 58 | + // not eol |
| 59 | + if line.contains("e.g.") { |
| 60 | + continue; |
| 61 | + } |
| 62 | + // not eol |
| 63 | + if line.contains("i.e.") { |
| 64 | + continue; |
| 65 | + } |
| 66 | + // tables |
| 67 | + if line.contains(" | ") { |
| 68 | + continue; |
| 69 | + } |
| 70 | + // code blocks |
| 71 | + if line.starts_with("```") { |
| 72 | + if in_code_block { |
| 73 | + in_code_block = false; |
| 74 | + } else { |
| 75 | + in_code_block = true; |
| 76 | + continue; |
| 77 | + } |
| 78 | + } |
| 79 | + if in_code_block { |
| 80 | + continue; |
| 81 | + } |
| 82 | + if split_re.is_match(line) { |
| 83 | + let indent = line.find(|ch: char| !ch.is_whitespace()).unwrap(); |
| 84 | + let new_lines: Vec<_> = line |
| 85 | + .split_inclusive(&split_re) |
| 86 | + .map(|portion| format!("{:indent$}{}", "", portion.trim())) |
| 87 | + .collect(); |
| 88 | + new_content.splice(new_n..new_n + 1, new_lines.clone()); |
| 89 | + new_n += new_lines.len() - 1; |
| 90 | + } |
| 91 | + } |
| 92 | + Ok(new_content.join("\n") + "\n") |
| 93 | +} |
| 94 | + |
| 95 | +#[test] |
| 96 | +fn test() { |
| 97 | + let original = "\ |
| 98 | +# some heading |
| 99 | + |
| 100 | +must! be; split? now. |
| 101 | +1. ignore numbered |
| 102 | +ignore | tables |
| 103 | +ignore e.g. and i.e. for realsies |
| 104 | +``` |
| 105 | +some code. block |
| 106 | +``` |
| 107 | +some more text. |
| 108 | +"; |
| 109 | + let reformatted = "\ |
| 110 | +# some heading |
| 111 | + |
| 112 | +must! |
| 113 | +be; |
| 114 | +split? |
| 115 | +now. |
| 116 | +1. ignore numbered |
| 117 | +ignore | tables |
| 118 | +ignore e.g. and i.e. for realsies |
| 119 | +``` |
| 120 | +some code. block |
| 121 | +``` |
| 122 | +some more text. |
| 123 | +"; |
| 124 | + assert_eq!(comply(original).unwrap(), reformatted); |
| 125 | +} |
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