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use std::collections::BTreeMap;
use std::collections::HashMap;
use std::os::unix::process::ExitStatusExt;
use std::process::{ExitStatus, Output};
/// alias
///
/// The builtin `alias` command. Used to monikers for other verbs, or entire
/// verses.
///
/// # Shell Example
/// ```sh
/// alias vim=nvim
/// ```
pub fn incant(
clause: &Option<Vec<String>>,
uout: bool,
aliases: &mut HashMap<String, String>,
) -> 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,
};
aliases.insert(String::from(key), String::from(val));
}
}
None => {
let mut lines = Vec::new();
let sorted: BTreeMap<_, _> = aliases.iter().collect();
for (key, val) in sorted {
let line = if key.contains(' ') && val.contains(' ') {
format!("'{}'='{}'", key, val)
} else if key.contains(' ') {
format!("'{}'={}", key, val)
} else if val.contains(' ') {
format!("{}='{}'", key, val)
} else if val.is_empty() {
format!("{}=''", key)
} else {
format!("{}={}", key, val)
};
lines.push(line);
}
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,
}
}
/// unalias
///
/// The builtin `unalias` command. Used to remove shell monikers, since `alias`
/// may be called with an empty string as the value.
///
/// # Shell Example
/// ```sh
/// unalias vim
/// ```
pub fn unincant(
clause: &Option<Vec<String>>,
uerr: bool,
aliases: &mut HashMap<String, String>,
) -> Output {
let out: Vec<u8> = Vec::new();
let mut err: Vec<u8> = Vec::new();
let status = match clause {
Some(clause) => {
for stanza in clause {
aliases.remove(stanza);
}
0
}
None => {
if uerr {
err.append(&mut "unalias: not enough arguments".as_bytes().to_vec());
} else {
eprintln!("unalias: not enough arguments");
}
1
}
};
Output {
status: ExitStatus::from_raw(status),
stdout: out,
stderr: err,
}
}
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