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test_bins.rs
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test_bins.rs
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use std::io::{self, BufRead, Read, Write};
use nu_command::create_default_context;
use nu_command::hook::{eval_env_change_hook, eval_hook};
use nu_engine::eval_block;
use nu_parser::parse;
use nu_protocol::engine::{EngineState, Stack, StateWorkingSet};
use nu_protocol::{CliError, PipelineData, Value};
use nu_std::load_standard_library;
// use nu_test_support::fs::in_directory;
/// Echo's value of env keys from args
/// Example: nu --testbin env_echo FOO BAR
/// If it it's not present echo's nothing
pub fn echo_env(to_stdout: bool) {
let args = args();
for arg in args {
if let Ok(v) = std::env::var(arg) {
if to_stdout {
println!("{v}");
} else {
eprintln!("{v}");
}
}
}
}
pub fn cococo() {
let args: Vec<String> = args();
if args.len() > 1 {
// Write back out all the arguments passed
// if given at least 1 instead of chickens
// speaking co co co.
println!("{}", &args[1..].join(" "));
} else {
println!("cococo");
}
}
pub fn meow() {
let args: Vec<String> = args();
for arg in args.iter().skip(1) {
let contents = std::fs::read_to_string(arg).expect("Expected a filepath");
println!("{contents}");
}
}
// A binary version of meow
pub fn meowb() {
let args: Vec<String> = args();
let stdout = io::stdout();
let mut handle = stdout.lock();
for arg in args.iter().skip(1) {
let buf = std::fs::read(arg).expect("Expected a filepath");
handle.write_all(&buf).expect("failed to write to stdout");
}
}
// Relays anything received on stdin to stdout
pub fn relay() {
io::copy(&mut io::stdin().lock(), &mut io::stdout().lock())
.expect("failed to copy stdin to stdout");
}
pub fn nonu() {
args().iter().skip(1).for_each(|arg| print!("{arg}"));
}
pub fn repeater() {
let mut stdout = io::stdout();
let args = args();
let mut args = args.iter().skip(1);
let letter = args.next().expect("needs a character to iterate");
let count = args.next().expect("need the number of times to iterate");
let count: u64 = count.parse().expect("can't convert count to number");
for _ in 0..count {
let _ = write!(stdout, "{letter}");
}
let _ = stdout.flush();
}
// A version of repeater that can output binary data, even null bytes
pub fn repeat_bytes() {
let mut stdout = io::stdout();
let args = args();
let mut args = args.iter().skip(1);
while let (Some(binary), Some(count)) = (args.next(), args.next()) {
let bytes: Vec<u8> = (0..binary.len())
.step_by(2)
.map(|i| {
u8::from_str_radix(&binary[i..i + 2], 16)
.expect("binary string is valid hexadecimal")
})
.collect();
let count: u64 = count.parse().expect("repeat count must be a number");
for _ in 0..count {
stdout
.write_all(&bytes)
.expect("writing to stdout must not fail");
}
}
let _ = stdout.flush();
}
pub fn iecho() {
// println! panics if stdout gets closed, whereas writeln gives us an error
let mut stdout = io::stdout();
let _ = args()
.iter()
.skip(1)
.cycle()
.try_for_each(|v| writeln!(stdout, "{v}"));
}
pub fn fail() {
std::process::exit(1);
}
pub fn chop() {
if did_chop_arguments() {
// we are done and don't care about standard input.
std::process::exit(0);
}
// if no arguments given, chop from standard input and exit.
let stdin = io::stdin();
let mut stdout = io::stdout();
for given in stdin.lock().lines().flatten() {
let chopped = if given.is_empty() {
&given
} else {
let to = given.len() - 1;
&given[..to]
};
if let Err(_e) = writeln!(stdout, "{chopped}") {
break;
}
}
std::process::exit(0);
}
fn outcome_err(
engine_state: &EngineState,
error: &(dyn miette::Diagnostic + Send + Sync + 'static),
) -> ! {
let working_set = StateWorkingSet::new(engine_state);
eprintln!("Error: {:?}", CliError(error, &working_set));
std::process::exit(1);
}
fn outcome_ok(msg: String) -> ! {
println!("{msg}");
std::process::exit(0);
}
pub fn nu_repl() {
//cwd: &str, source_lines: &[&str]) {
let cwd = std::env::current_dir().expect("Could not get current working directory.");
let source_lines = args();
let mut engine_state = nu_cli::add_cli_context(create_default_context());
let mut stack = Stack::new();
engine_state.add_env_var("PWD".into(), Value::test_string(cwd.to_string_lossy()));
let mut last_output = String::new();
load_standard_library(&mut engine_state).expect("Could not load the standard library.");
for (i, line) in source_lines.iter().enumerate() {
let cwd = nu_engine::env::current_dir(&engine_state, &stack)
.unwrap_or_else(|err| outcome_err(&engine_state, &err));
// Before doing anything, merge the environment from the previous REPL iteration into the
// permanent state.
if let Err(err) = engine_state.merge_env(&mut stack) {
outcome_err(&engine_state, &err);
}
if let Err(err) = engine_state.set_current_working_dir(&cwd) {
outcome_err(&engine_state, &err);
}
// Check for pre_prompt hook
let config = engine_state.get_config();
if let Some(hook) = config.hooks.pre_prompt.clone() {
if let Err(err) = eval_hook(&mut engine_state, &mut stack, None, vec![], &hook) {
outcome_err(&engine_state, &err);
}
}
// Check for env change hook
let config = engine_state.get_config();
if let Err(err) = eval_env_change_hook(
config.hooks.env_change.clone(),
&mut engine_state,
&mut stack,
) {
outcome_err(&engine_state, &err);
}
// Check for pre_execution hook
let config = engine_state.get_config();
*engine_state
.repl_buffer_state
.lock()
.expect("repl buffer state mutex") = line.to_string();
if let Some(hook) = config.hooks.pre_execution.clone() {
if let Err(err) = eval_hook(&mut engine_state, &mut stack, None, vec![], &hook) {
outcome_err(&engine_state, &err);
}
}
// Eval the REPL line
let (block, delta) = {
let mut working_set = StateWorkingSet::new(&engine_state);
let block = parse(
&mut working_set,
Some(&format!("line{i}")),
line.as_bytes(),
false,
);
if let Some(err) = working_set.parse_errors.first() {
outcome_err(&engine_state, err);
}
(block, working_set.render())
};
if let Err(err) = engine_state.merge_delta(delta) {
outcome_err(&engine_state, &err);
}
let input = PipelineData::empty();
let config = engine_state.get_config();
match eval_block(&engine_state, &mut stack, &block, input, false, false) {
Ok(pipeline_data) => match pipeline_data.collect_string("", config) {
Ok(s) => last_output = s,
Err(err) => outcome_err(&engine_state, &err),
},
Err(err) => outcome_err(&engine_state, &err),
}
if let Some(cwd) = stack.get_env_var(&engine_state, "PWD") {
let path = cwd
.as_string()
.unwrap_or_else(|err| outcome_err(&engine_state, &err));
let _ = std::env::set_current_dir(path);
engine_state.add_env_var("PWD".into(), cwd);
}
}
outcome_ok(last_output)
}
fn did_chop_arguments() -> bool {
let args: Vec<String> = args();
if args.len() > 1 {
let mut arguments = args.iter();
arguments.next();
for arg in arguments {
let chopped = if arg.is_empty() {
arg
} else {
let to = arg.len() - 1;
&arg[..to]
};
println!("{chopped}");
}
return true;
}
false
}
pub fn input_bytes_length() {
let stdin = io::stdin();
let count = stdin.lock().bytes().count();
println!("{}", count);
}
fn args() -> Vec<String> {
// skip (--testbin bin_name args)
std::env::args().skip(2).collect()
}