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|
use std::fs;
use std::path::Path;
/// Docsify code blocks require that blank lines before and after code blocks are not completely empty,
/// but must contain at least one space, otherwise code block rendering will have issues.
///
/// This tool scans all `.md` files in the docs directory,
/// and replaces completely empty lines before and after code blocks with blank lines containing a single space.
const DOCS_DIR: &str = "./docs";
fn main() {
println!("Fixing code box empty lines in docs/**/*.md ...");
let repo_root = find_git_repo().expect("Cannot find git repo root");
let docs_dir = repo_root.join(DOCS_DIR);
let mut fixed_count = 0;
let mut file_count = 0;
collect_md_files(&docs_dir, &mut |path| {
if let Some(name) = path.file_name() {
let name = name.to_string_lossy();
if name.to_lowercase() == "_sidebar.md" {
return;
}
}
let content = fs::read_to_string(path).unwrap_or_default();
if content.is_empty() {
return;
}
let new_content = fix_code_box_empty_lines(&content);
if new_content != content {
fs::write(path, &new_content).unwrap();
println!(" Fixed: {}", path.display());
fixed_count += 1;
}
file_count += 1;
});
println!(
"Done. Scanned {} files, fixed {} files.",
file_count, fixed_count
);
}
fn fix_code_box_empty_lines(content: &str) -> String {
let mut result = String::new();
let lines: Vec<&str> = content.lines().collect();
let len = lines.len();
let mut i = 0;
while i < len {
let line = lines[i];
// detect beginning of code block: beginning with ```
if line.trim_start().starts_with("```") {
// record the beginning line of the code block
result.push_str(line);
result.push('\n');
i += 1;
// find the end of the code block
let mut found_end = false;
let code_start = i; // record starting position of code content
let mut code_end = len; // index of code block end line
while i < len {
let cline = lines[i];
if cline.trim_start().starts_with("```") && cline.trim() != "" {
// this is the closing marker
code_end = i;
found_end = true;
break;
}
i += 1;
}
// check the blank line before the code block
// if result ends with \n\n, add a space to turn it into \n \n
ensure_space_before_code_block(&mut result);
// output code content
for code_line in lines.iter().take(code_end).skip(code_start) {
if code_line.is_empty() {
result.push(' ');
} else {
result.push_str(code_line);
}
result.push('\n');
}
if found_end {
result.push_str(lines[code_end]);
result.push('\n');
i += 1;
// check the blank line after the code block
// if the next line is blank, change it to one with a space
if i < len && lines[i].trim().is_empty() && lines[i].is_empty() {
// skip the original blank line, write " \n"
result.push(' ');
result.push('\n');
i += 1;
}
}
} else {
result.push_str(line);
result.push('\n');
i += 1;
}
}
// remove trailing newlines
while result.ends_with('\n') {
result.pop();
}
result.push('\n');
result
}
/// ensure there is a blank line with a space before the code block
fn ensure_space_before_code_block(result: &mut String) {
// if result ends with \n\n,
// turn it into \n \n
let len = result.len();
if len >= 2 && result[len - 2..] == *"\n\n" {
// insert a space before the last \n
result.insert(len - 1, ' ');
}
}
/// recursively collect all .md files in the docs directory
fn collect_md_files(dir: &Path, callback: &mut dyn FnMut(&Path)) {
if let Ok(entries) = fs::read_dir(dir) {
for entry in entries.flatten() {
let path = entry.path();
if path.is_dir() {
collect_md_files(&path, callback);
} else if path.extension().is_some_and(|ext| ext == "md") {
callback(&path);
}
}
}
}
fn find_git_repo() -> Option<std::path::PathBuf> {
let mut current_dir = std::env::current_dir().ok()?;
loop {
let git_dir = current_dir.join(".git");
if git_dir.exists() && git_dir.is_dir() {
return Some(current_dir);
}
if !current_dir.pop() {
break;
}
}
None
}
|
