unifier/
fs_text.rs

1//! Small filesystem helpers for text files and atomic writes.
2
3use std::fs;
4use std::path::Path;
5
6use uuid::Uuid;
7
8use crate::error::Result;
9
10pub fn read_text(path: &Path) -> Result<String> {
11    Ok(fs::read_to_string(path)?.trim_end().to_string())
12}
13
14pub fn write_text(path: &Path, content: &str) -> Result<()> {
15    if let Some(p) = path.parent() {
16        fs::create_dir_all(p)?;
17    }
18    fs::write(path, content)?;
19    Ok(())
20}
21
22/// Write to a temp file in the same directory, then rename for atomicity.
23pub fn write_text_atomic(path: &Path, content: &str) -> Result<()> {
24    if let Some(p) = path.parent() {
25        fs::create_dir_all(p)?;
26    }
27    let dir = path
28        .parent()
29        .ok_or_else(|| crate::Error::msg("path has no parent"))?;
30    let tmp = dir.join(format!(
31        ".{}.tmp.{}",
32        path.file_name()
33            .and_then(|s| s.to_str())
34            .unwrap_or("file"),
35        Uuid::new_v4()
36    ));
37    fs::write(&tmp, content)?;
38    fs::rename(&tmp, path)?;
39    Ok(())
40}
unifier/fs_text.rs

unifier/
fs_text.rs
