use std::env;
use std::fs;
use std::io;
#[cfg(unix)]
use std::os::unix::fs::PermissionsExt;
use std::path::{Path, PathBuf};
use std::process::{Command, Stdio};
pub fn command_exists(name: &str) -> bool {
resolve_command_path(name).is_some()
}
pub fn resolve_command_path(name: &str) -> Option<PathBuf> {
if name.contains('/') || name.contains('\\') {
let path = Path::new(name);
return is_executable(path).then(|| path.to_path_buf());
}
let candidates = command_name_candidates(name);
for dir in env::split_paths(&env::var_os("PATH")?) {
for candidate_name in &candidates {
let candidate = dir.join(candidate_name);
if is_executable(&candidate) {
return Some(candidate);
}
}
}
None
}
#[cfg(windows)]
fn command_name_candidates(name: &str) -> Vec<String> {
let path = Path::new(name);
if path.extension().is_some() {
return vec![name.to_string()];
}
let pathext = env::var_os("PATHEXT")
.and_then(|value| value.into_string().ok())
.unwrap_or_else(|| ".COM;.EXE;.BAT;.CMD".to_string());
let mut candidates = Vec::new();
for ext in pathext
.split(';')
.map(str::trim)
.filter(|ext| !ext.is_empty())
{
candidates.push(format!("{name}{ext}"));
}
candidates.push(name.to_string());
candidates
}
#[cfg(not(windows))]
fn command_name_candidates(name: &str) -> Vec<String> {
vec![name.to_string()]
}
fn command_program(program: &str) -> PathBuf {
resolve_command_path(program).unwrap_or_else(|| PathBuf::from(program))
}
fn command(program: &str) -> Command {
let program_path = command_program(program);
#[cfg(windows)]
{
if program_path
.extension()
.and_then(|ext| ext.to_str())
.is_some_and(|ext| ext.eq_ignore_ascii_case("cmd") || ext.eq_ignore_ascii_case("bat"))
{
let mut cmd = Command::new("cmd.exe");
cmd.arg("/D").arg("/C").arg("call").arg(program_path);
return cmd;
}
}
Command::new(program_path)
}
fn is_executable(path: &Path) -> bool {
let Ok(meta) = fs::metadata(path) else {
return false;
};
if !meta.is_file() {
return false;
}
#[cfg(unix)]
{
meta.permissions().mode() & 0o111 != 0
}
#[cfg(not(unix))]
{
true
}
}
pub fn run_capture(program: &str, args: &[&str]) -> io::Result<(i32, String)> {
let output = command(program).args(args).output()?;
let code = output.status.code().unwrap_or(-1);
let mut text = String::new();
text.push_str(&String::from_utf8_lossy(&output.stdout));
text.push_str(&String::from_utf8_lossy(&output.stderr));
Ok((code, text))
}
pub fn run_inherit(program: &str, args: &[&str]) -> io::Result<bool> {
let status = command(program)
.args(args)
.stdin(Stdio::inherit())
.stdout(Stdio::inherit())
.stderr(Stdio::inherit())
.status()?;
Ok(status.success())
}
pub fn run_cargo_install_update_capture(args: &[&str]) -> io::Result<(i32, String)> {
let mut proxy_args = vec!["install-update"];
proxy_args.extend_from_slice(args);
run_capture("cargo-install-update", &proxy_args)
}
pub fn run_cargo_install_update_inherit(args: &[&str]) -> io::Result<bool> {
let mut proxy_args = vec!["install-update"];
proxy_args.extend_from_slice(args);
run_inherit("cargo-install-update", &proxy_args)
}
pub fn run_nvim_headless_capture(args: &[&str]) -> io::Result<(i32, String)> {
let mut all_args = vec!["--headless"];
all_args.extend_from_slice(args);
run_capture("nvim", &all_args)
}
pub fn run_nvim_headless_inherit(args: &[&str]) -> io::Result<bool> {
let mut all_args = vec!["--headless"];
all_args.extend_from_slice(args);
run_inherit("nvim", &all_args)
}