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
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
//! Canonical definitions of `home_dir`, `cargo_home`, and `rustup_home`.
//!
//! This provides the definition of `home_dir` used by Cargo and
//! rustup, as well functions to find the correct value of
//! `CARGO_HOME` and `RUSTUP_HOME`.
//!
//! See also the [`dirs`](https://docs.rs/dirs) crate.
//!
//! _Note that as of 2019/08/06 it appears that cargo uses this crate. And
//! rustup has used this crate since 2019/08/21._
//!
//! The definition of `home_dir` provided by the standard library is
//! incorrect because it considers the `HOME` environment variable on
//! Windows. This causes surprising situations where a Rust program
//! will behave differently depending on whether it is run under a
//! Unix emulation environment like Cygwin or MinGW. Neither Cargo nor
//! rustup use the standard libraries definition - they use the
//! definition here.
//!
//! This crate further provides two functions, `cargo_home` and
//! `rustup_home`, which are the canonical way to determine the
//! location that Cargo and rustup store their data.
//!
//! See also this [discussion].
//!
//! [discussion]: https://github.com/rust-lang/rust/pull/46799#issuecomment-361156935
#![doc(html_root_url = "https://docs.rs/home/0.5.4")]
#![deny(rust_2018_idioms)]
pub mod env;
#[cfg(windows)]
mod windows;
use std::io;
use std::path::{Path, PathBuf};
/// Returns the path of the current user's home directory if known.
///
/// # Unix
///
/// Returns the value of the `HOME` environment variable if it is set
/// and not equal to the empty string. Otherwise, it tries to determine the
/// home directory by invoking the `getpwuid_r` function on the UID of the
/// current user.
///
/// # Windows
///
/// Returns the value of the `USERPROFILE` environment variable if it
/// is set and not equal to the empty string. If both do not exist,
/// [`SHGetFolderPathW`][msdn] is used to return the appropriate path.
///
/// [msdn]: https://docs.microsoft.com/en-us/windows/win32/api/shlobj_core/nf-shlobj_core-shgetfolderpathw
///
/// # Examples
///
/// ```
/// match home::home_dir() {
/// Some(path) => println!("{}", path.display()),
/// None => println!("Impossible to get your home dir!"),
/// }
/// ```
pub fn home_dir() -> Option<PathBuf> {
env::home_dir_with_env(&env::OS_ENV)
}
#[cfg(windows)]
use windows::home_dir_inner;
#[cfg(any(unix, target_os = "redox"))]
fn home_dir_inner() -> Option<PathBuf> {
#[allow(deprecated)]
std::env::home_dir()
}
/// Returns the storage directory used by Cargo, often knowns as
/// `.cargo` or `CARGO_HOME`.
///
/// It returns one of the following values, in this order of
/// preference:
///
/// - The value of the `CARGO_HOME` environment variable, if it is
/// an absolute path.
/// - The value of the current working directory joined with the value
/// of the `CARGO_HOME` environment variable, if `CARGO_HOME` is a
/// relative directory.
/// - The `.cargo` directory in the user's home directory, as reported
/// by the `home_dir` function.
///
/// # Errors
///
/// This function fails if it fails to retrieve the current directory,
/// or if the home directory cannot be determined.
///
/// # Examples
///
/// ```
/// match home::cargo_home() {
/// Ok(path) => println!("{}", path.display()),
/// Err(err) => eprintln!("Cannot get your cargo home dir: {:?}", err),
/// }
/// ```
pub fn cargo_home() -> io::Result<PathBuf> {
env::cargo_home_with_env(&env::OS_ENV)
}
/// Returns the storage directory used by Cargo within `cwd`.
/// For more details, see [`cargo_home`](fn.cargo_home.html).
pub fn cargo_home_with_cwd(cwd: &Path) -> io::Result<PathBuf> {
env::cargo_home_with_cwd_env(&env::OS_ENV, cwd)
}
/// Returns the storage directory used by rustup, often knowns as
/// `.rustup` or `RUSTUP_HOME`.
///
/// It returns one of the following values, in this order of
/// preference:
///
/// - The value of the `RUSTUP_HOME` environment variable, if it is
/// an absolute path.
/// - The value of the current working directory joined with the value
/// of the `RUSTUP_HOME` environment variable, if `RUSTUP_HOME` is a
/// relative directory.
/// - The `.rustup` directory in the user's home directory, as reported
/// by the `home_dir` function.
///
/// # Errors
///
/// This function fails if it fails to retrieve the current directory,
/// or if the home directory cannot be determined.
///
/// # Examples
///
/// ```
/// match home::rustup_home() {
/// Ok(path) => println!("{}", path.display()),
/// Err(err) => eprintln!("Cannot get your rustup home dir: {:?}", err),
/// }
/// ```
pub fn rustup_home() -> io::Result<PathBuf> {
env::rustup_home_with_env(&env::OS_ENV)
}
/// Returns the storage directory used by rustup within `cwd`.
/// For more details, see [`rustup_home`](fn.rustup_home.html).
pub fn rustup_home_with_cwd(cwd: &Path) -> io::Result<PathBuf> {
env::rustup_home_with_cwd_env(&env::OS_ENV, cwd)
}
|
