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pub mod ast;
#[derive(Debug, Eq, PartialEq)]
pub struct Pipeline {
exes: Vec<Exe>,
}
impl Pipeline {
pub fn into_exes(self) -> impl Iterator<Item = Exe> {
self.exes.into_iter()
}
}
#[derive(Debug, Eq, PartialEq)]
pub struct Exe {
exe: std::path::PathBuf,
args: Vec<String>,
redirects: Vec<Redirect>,
}
impl Exe {
pub fn exe(&self) -> &std::path::Path {
&self.exe
}
pub fn args(&self) -> &[String] {
&self.args
}
pub fn redirects(&self) -> &[Redirect] {
&self.redirects
}
pub fn shift(&mut self) {
self.exe = std::path::PathBuf::from(self.args.remove(0));
}
}
#[derive(Debug, Clone, Eq, PartialEq)]
pub struct Redirect {
pub from: std::os::unix::io::RawFd,
pub to: RedirectTarget,
pub dir: Direction,
}
#[derive(Debug, Clone, Eq, PartialEq)]
pub enum RedirectTarget {
Fd(std::os::unix::io::RawFd),
File(std::path::PathBuf),
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum Direction {
In,
Out,
Append,
}
impl Direction {
pub fn open(
self,
path: &std::path::Path,
) -> nix::Result<std::os::unix::io::RawFd> {
use nix::fcntl::OFlag;
use nix::sys::stat::Mode;
Ok(match self {
Self::In => nix::fcntl::open(
path,
OFlag::O_NOCTTY | OFlag::O_RDONLY,
Mode::empty(),
)?,
Self::Out => nix::fcntl::open(
path,
OFlag::O_CREAT
| OFlag::O_NOCTTY
| OFlag::O_WRONLY
| OFlag::O_TRUNC,
Mode::S_IRUSR
| Mode::S_IWUSR
| Mode::S_IRGRP
| Mode::S_IWGRP
| Mode::S_IROTH
| Mode::S_IWOTH,
)?,
Self::Append => nix::fcntl::open(
path,
OFlag::O_APPEND
| OFlag::O_CREAT
| OFlag::O_NOCTTY
| OFlag::O_WRONLY,
Mode::S_IRUSR
| Mode::S_IWUSR
| Mode::S_IRGRP
| Mode::S_IWGRP
| Mode::S_IROTH
| Mode::S_IWOTH,
)?,
})
}
}
#[derive(Debug, Eq, PartialEq)]
pub struct Error {
input: String,
e: pest::error::Error<ast::Rule>,
}
impl Error {
fn new(input: String, e: pest::error::Error<ast::Rule>) -> Self {
Self {
input,
e,
}
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match &self.e.variant {
pest::error::ErrorVariant::ParsingError {
positives,
negatives,
} => {
if !positives.is_empty() {
write!(f, "expected {:?}", positives[0])?;
for rule in &positives[1..] {
write!(f, ", {:?}", rule)?;
}
if !negatives.is_empty() {
write!(f, "; ")?;
}
}
if !negatives.is_empty() {
write!(f, "unexpected {:?}", negatives[0])?;
for rule in &negatives[1..] {
write!(f, ", {:?}", rule)?;
}
}
writeln!(f)?;
writeln!(f, "{}", self.input)?;
match &self.e.location {
pest::error::InputLocation::Pos(i) => {
write!(f, "{}^", " ".repeat(*i))?;
}
pest::error::InputLocation::Span((i, j)) => {
write!(f, "{}{}", " ".repeat(*i), "^".repeat(j - i))?;
}
}
}
pest::error::ErrorVariant::CustomError { message } => {
write!(f, "{}", message)?;
}
}
Ok(())
}
}
impl std::error::Error for Error {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
Some(&self.e)
}
}
|
