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pub mod lexer;
use std::path::Path;
use crate::{
ast::{Directive, DirectiveTrait},
lexer::line_column2,
};
use self::lexer::*;
use anyhow::Context;
use nom::{
combinator::{fail, map, map_opt, verify},
sequence::tuple,
IResult,
};
#[derive(Debug, Clone, Default)]
pub struct Apache;
impl DirectiveTrait<Apache> for Directive<Apache> {
fn parse(input: &[u8]) -> anyhow::Result<Vec<Self>> {
let res = parse_block(input).map_err(|err| {
err.map(|e| {
let ((l, c), pos) = line_column2(input, e.input).unwrap();
anyhow::anyhow!("{pos}({l}:{c}) err: {:?}", e.code)
})
})?;
Ok(res.1)
}
fn resolve_include_inner(mut self, dir: &Path, out: &mut Vec<Self>) -> anyhow::Result<()> {
let optional = self.name.eq_ignore_ascii_case("IncludeOptional");
if self.name.eq_ignore_ascii_case("include") || optional {
let path = Path::new(
self.args
.get(0)
.context("include directive expect one arg")?
.as_str(),
);
for path in glob::glob(
&if path.is_absolute() {
path.to_path_buf()
} else {
dir.join(path)
}
.to_string_lossy(),
)?
.flatten()
{
if optional && !path.exists() {
continue;
}
let data = std::fs::read(&path)?;
for c in Self::parse(&data).with_context(|| format!("parse {path:?}"))? {
c.resolve_include_inner(dir, out)?;
}
}
} else {
self.resolve_include(dir)?;
out.push(self);
}
Ok(())
}
}
fn parse_block(mut input: &[u8]) -> IResult<&[u8], Vec<Directive<Apache>>> {
let mut result = vec![];
loop {
let (rest, tok) = tokenizer(input)?;
match tok {
Token::NewLine => {
input = rest;
continue;
}
Token::CloseTag | Token::Eof => break,
_ => {}
}
let res = parse_one(rest, tok)?;
result.push(res.1);
input = res.0;
}
Ok((input, result))
}
fn parse_one<'a>(input: &'a [u8], tok: Token<'a>) -> IResult<&'a [u8], Directive<Apache>> {
match tok {
Token::OpenTag => {
let (rest, name) = map_opt(tokenizer, |tok| tok.ident())(input)?;
map(
tuple((
parse_args::<false>,
verify(tokenizer, |tok| tok == &Token::EndTag),
parse_block,
verify(tuple((tokenizer, tokenizer, tokenizer)), |&(b, tag, e)| {
b == Token::CloseTag
&& tag
.raw_string()
.unwrap_or_default()
.eq_ignore_ascii_case(name)
&& e == Token::EndTag
}),
)),
|(args, _, children, _)| Directive {
name: name.into(),
args,
children: Some(children),
..Default::default()
},
)(rest)
}
Token::Literal(l) => map(parse_args::<true>, |args| Directive {
name: l.raw.into(),
args,
children: None,
..Default::default()
})(input),
_ => fail(input),
}
}
fn parse_args<const NL: bool>(mut input: &[u8]) -> IResult<&[u8], Vec<String>> {
let mut result = vec![];
loop {
let (rest, tok) = inner_tokenizer::<NL>(input)?;
if let Some(l) = tok.literal() {
result.push(l.into());
} else {
break;
}
input = rest;
}
Ok((input, result))
}