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use std::collections::BTreeMap;
use std::env;
use std::os::unix::process::ExitStatusExt;
use std::process::{ExitStatus, Output};
/// export
///
/// The builtin `export` command. Used to set global environment
/// variables for the current instance of the shell.
///
/// # Aliases
/// * export
/// * set
///
/// # Shell Examples
/// ```sh
/// export FOO=BAR
/// ```
pub fn incant(clause: &Option<Vec<String>>, uout: bool) -> Output {
let status = 0;
let mut out: Vec<u8> = Vec::new();
let err: Vec<u8> = Vec::new();
match clause {
Some(clause) => {
for stanza in clause {
let (key, val) = match stanza.split_once("=") {
Some((key, val)) => (key, val),
None => continue,
};
env::set_var(key, val);
}
}
None => {
let mut lines = Vec::new();
let sorted: BTreeMap<_, _> = env::vars().into_iter().collect();
for (key, val) in sorted {
lines.push(format!("{}={}", key, val));
}
if uout {
out.append(&mut format!("{}\n", lines.join("\n")).as_bytes().to_vec());
} else {
println!("{}", lines.join("\n"));
}
}
}
Output {
status: ExitStatus::from_raw(status),
stdout: out,
stderr: err,
}
}
/// unset
///
/// The builtin `unset` command. Used to remove global environment variables
/// from the current instance of the shell, since `export` may be called with
/// an empty string as the value.
///
/// # Shell Examples
/// ```sh
/// unset FOO
/// ```
pub fn unincant(clause: &Option<Vec<String>>, uerr: bool) -> Output {
let mut status = 0;
let out: Vec<u8> = Vec::new();
let mut err: Vec<u8> = Vec::new();
match clause {
Some(clause) => {
for stanza in clause {
env::remove_var(stanza);
}
}
None => {
status = 1;
if uerr {
err.append(&mut "unset: not enough arguments\n".as_bytes().to_vec());
} else {
eprintln!("unset: not enough arguments");
}
}
}
Output {
status: ExitStatus::from_raw(status),
stdout: out,
stderr: err,
}
}
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