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|
use pest::Parser as _;
#[derive(pest_derive::Parser)]
#[grammar = "shell.pest"]
struct Shell;
#[derive(Debug, Clone)]
pub struct Word {
word: String,
interpolate: bool,
}
impl Word {
fn new(word: &str) -> Self {
Self {
word: word.to_string(),
interpolate: true,
}
}
fn literal(word: &str) -> Self {
Self {
word: word.to_string(),
interpolate: false,
}
}
}
#[derive(Debug, Clone)]
pub struct Exe {
exe: Word,
args: Vec<Word>,
}
impl Exe {
fn build_ast(pair: pest::iterators::Pair<Rule>) -> Self {
assert!(matches!(pair.as_rule(), Rule::exe));
let mut iter = pair.into_inner();
let exe = Word::new(iter.next().unwrap().as_str());
let args = iter.map(|word| Word::new(word.as_str())).collect();
Self { exe, args }
}
pub fn exe(&self) -> &str {
&self.exe.word
}
pub fn args(&self) -> impl Iterator<Item = &str> {
self.args.iter().map(|arg| arg.word.as_ref())
}
}
#[derive(Debug, Clone)]
pub struct Pipeline {
exes: Vec<Exe>,
}
impl Pipeline {
pub fn exes(&self) -> &[Exe] {
&self.exes
}
fn build_ast(pipeline: pest::iterators::Pair<Rule>) -> Self {
assert!(matches!(pipeline.as_rule(), Rule::pipeline));
Self {
exes: pipeline.into_inner().map(Exe::build_ast).collect(),
}
}
}
#[derive(Debug, Clone)]
pub struct Commands {
pipelines: Vec<Pipeline>,
input_string: String,
}
impl Commands {
pub fn parse(full_cmd: &str) -> Self {
Self::build_ast(
Shell::parse(Rule::line, full_cmd)
.unwrap()
.next()
.unwrap()
.into_inner()
.next()
.unwrap(),
)
}
pub fn pipelines(&self) -> &[Pipeline] {
&self.pipelines
}
pub fn input_string(&self) -> &str {
&self.input_string
}
fn build_ast(commands: pest::iterators::Pair<Rule>) -> Self {
assert!(matches!(commands.as_rule(), Rule::commands));
let input_string = commands.as_str().to_string();
Self {
pipelines: commands
.into_inner()
.map(Pipeline::build_ast)
.collect(),
input_string,
}
}
}
|
