mirror of
https://github.com/cargo-bins/cargo-binstall.git
synced 2025-04-22 21:48:42 +00:00
42 lines
1.3 KiB
Rust
42 lines
1.3 KiB
Rust
use std::{
|
|
fs::File,
|
|
io::{Result, Write},
|
|
process::Command,
|
|
};
|
|
#[cfg(unix)]
|
|
use std::{fs::Permissions, os::unix::fs::PermissionsExt};
|
|
|
|
use tempfile::tempdir;
|
|
|
|
const WASI_PROGRAM: &[u8] = include_bytes!("miniwasi.wasm");
|
|
|
|
/// Detect the ability to run WASI
|
|
///
|
|
/// This attempts to run a small embedded WASI program, and returns true if no errors happened.
|
|
/// Errors returned by the `Result` are I/O errors from the establishment of the context, not
|
|
/// errors from the run attempt.
|
|
///
|
|
/// On Linux, you can configure your system to run WASI programs using a binfmt directive. Under
|
|
/// systemd, write the below to `/etc/binfmt.d/wasi.conf`, with `/usr/bin/wasmtime` optionally
|
|
/// replaced with the path to your WASI runtime of choice:
|
|
///
|
|
/// ```plain
|
|
/// :wasi:M::\x00asm::/usr/bin/wasmtime:
|
|
/// ```
|
|
pub fn detect_wasi_runability() -> Result<bool> {
|
|
let progdir = tempdir()?;
|
|
let prog = progdir.path().join("miniwasi.wasm");
|
|
|
|
{
|
|
let mut progfile = File::create(&prog)?;
|
|
progfile.write_all(WASI_PROGRAM)?;
|
|
|
|
#[cfg(unix)]
|
|
progfile.set_permissions(Permissions::from_mode(0o777))?;
|
|
}
|
|
|
|
match Command::new(prog).output() {
|
|
Ok(out) => Ok(out.status.success() && out.stdout.is_empty() && out.stderr.is_empty()),
|
|
Err(_) => Ok(false),
|
|
}
|
|
}
|