i18n-le 0.3.0

Audit translation catalogues for missing keys, placeholder drift and structural mismatches
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60

//! A throwaway directory tree, for the modules that genuinely need a
//! filesystem.
//!
//! The pure modules never do — that is the point of the split — so this
//! is only ever used by `identify` and `scan`.
//!
//! The root is canonicalised on creation. On macOS the temporary
//! directory is itself a symlink (`/tmp` → `/private/tmp`), so a root
//! taken as given and a path resolved through the filesystem are two
//! spellings of the same directory — and every `starts_with` check
//! between them fails for a reason that has nothing to do with the code
//! under test.

use std::path::{Path, PathBuf};
use std::sync::atomic::{AtomicUsize, Ordering};

static COUNTER: AtomicUsize = AtomicUsize::new(0);

pub(crate) struct TempTree {
    root: PathBuf,
}

impl TempTree {
    pub(crate) fn new(name: &str) -> Self {
        let unique = COUNTER.fetch_add(1, Ordering::Relaxed);
        let root =
            std::env::temp_dir().join(format!("i18n-le-{name}-{}-{unique}", std::process::id()));
        // A leftover from a killed run would otherwise leak into this
        // one and make it pass or fail for the wrong reason.
        let _ = std::fs::remove_dir_all(&root);
        std::fs::create_dir_all(&root).expect("a temporary directory");
        let root = std::fs::canonicalize(&root).expect("a canonical temporary directory");
        Self { root }
    }

    pub(crate) fn path(&self) -> &Path {
        &self.root
    }

    pub(crate) fn write(&self, relative: &str, contents: &str) -> PathBuf {
        self.write_bytes(relative, contents.as_bytes())
    }

    /// Bytes rather than text, for the hazards that only exist on the way
    /// in from a filesystem — a catalogue that is not UTF-8 at all.
    pub(crate) fn write_bytes(&self, relative: &str, contents: &[u8]) -> PathBuf {
        let target = self.root.join(relative);
        if let Some(parent) = target.parent() {
            std::fs::create_dir_all(parent).expect("a parent directory");
        }
        std::fs::write(&target, contents).expect("a file");
        target
    }
}

impl Drop for TempTree {
    fn drop(&mut self) {
        let _ = std::fs::remove_dir_all(&self.root);
    }
}