asimov-core 25.1.0

ASIMOV Software Development Kit (SDK) for Rust
Documentation 
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

// This is free and unencumbered software released into the public domain.

pub const ASIMOV_HOME: &str = "ASIMOV_HOME";

#[cfg(feature = "std")]
const CONFIG_PATH: &str = ".config/asimov";

/// Returns the home directory of the current user.
#[cfg(feature = "std")]
pub fn home_dir(
    ambient_authority: cap_std::AmbientAuthority,
) -> std::io::Result<cap_std::fs_utf8::Dir> {
    use cap_std::fs_utf8::Dir;

    let user_dirs = cap_directories::UserDirs::new().unwrap();
    user_dirs.home_dir(ambient_authority).map(Dir::from_cap_std)
}

/// Returns the `ASIMOV_HOME` configuration directory.
#[cfg(feature = "std")]
pub fn config_dir(
    ambient_authority: cap_std::AmbientAuthority,
) -> std::io::Result<cap_std::fs_utf8::Dir> {
    use cap_std::fs_utf8::Dir;
    use std::{
        env::VarError,
        io::{Error, ErrorKind},
    };

    match std::env::var(ASIMOV_HOME) {
        Err(VarError::NotUnicode(_)) => Err(Error::new(
            ErrorKind::InvalidData,
            "ASIMOV_HOME is not valid Unicode",
        )),
        Err(VarError::NotPresent) => home_dir(ambient_authority)
            .and_then(|home_dir| {
                home_dir.create_dir_all(CONFIG_PATH)?;
                Ok(home_dir)
            })
            .and_then(|home_dir| home_dir.open_dir(CONFIG_PATH)),
        Ok(path) if path.trim().is_empty() => {
            Err(Error::new(ErrorKind::InvalidData, "ASIMOV_HOME is empty"))
        },
        Ok(path) => Dir::create_ambient_dir_all(&path, ambient_authority)
            .and_then(|_| Dir::open_ambient_dir(&path, ambient_authority)),
    }
}