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use std::{path::PathBuf, fs, process::exit};
use pipeline::{Change, ChangeKind};
use rowan::{ast::AstNode, TextSize, NodeOrToken};
use clap::{arg, Parser};
#[allow(dead_code)]
mod queries;
#[allow(dead_code)]
mod status_reporter;
mod batchmode;
#[allow(dead_code)]
mod util;
#[allow(dead_code)]
mod pipeline;
#[derive(clap::Parser)]
struct Args {
query: String,
path: Vec<PathBuf>,
#[arg(short, long)]
debug: bool,
#[arg(long)]
batchmode: bool
}
fn parse_nexp(path: &PathBuf) -> anyhow::Result<(String, rnix::Root)> {
let content = fs::read_to_string(path)?;
let parse = rnix::Root::parse(&content);
if !parse.errors().is_empty() {
anyhow::bail!("error: {:?}", parse.errors());
}
Ok((content, parse.tree()))
}
fn main() {
let args = Args::parse();
let parse = queries::parse(&args.query);
if parse.errors.len() != 0 {
eprintln!(
"syntax {}: \n {}",
if parse.errors.len() == 1 { "error" } else { "errors" },
parse.errors.join(" \n")
);
exit(1);
}
// println!("{nexp:#?}");
if args.batchmode {
batchmode::batchmode(args.path, parse, args.debug);
} else {
let (content, nexp) = match parse_nexp(&args.path[0]) {
Err(e) => {
eprintln!("could not parse file: {e}");
exit(2);
},
Ok(exp) => exp
};
let (changes, results) = parse.apply(&content, nexp.syntax().clone()).unwrap();
if args.debug {
println!("{changes:?}");
}
if changes.len() == 0 {
for result in results {
println!("{result}");
}
} else {
let changed = apply_changes(&content, changes, args.debug);
println!("{changed}");
}
}
}
fn apply_changes(content: &str, mut changes: Vec<Change>, debug: bool) -> String {
let mut last_pos = 0;
let mut ncontent = String::new();
changes.sort_by_key(|change| change.node.text_range().start());
for change in changes {
match change.kind {
ChangeKind::Remove => {
let (before, after) = remove_node(&change.node);
if last_pos > before { continue }
ncontent += &content[last_pos..before];
if debug {
println!("removing: {}", &content[before..after])
}
last_pos = after;
}
ChangeKind::Keep => {
// let (before, after) = surrounding_whitespace(&change.node);
let (before, after) = (change.node.text_range().start().into(), change.node.text_range().end().into());
if debug {
println!("keeping: {}", &content[before..after])
};
ncontent += &content[before..after];
// last_pos = after;
}
}
}
ncontent += &content[last_pos..];
ncontent
}
#[allow(unused)]
fn surrounding_whitespace(node: &rnix::SyntaxNode) -> (usize, usize) {
let before = node
.prev_sibling_or_token()
.filter(|n| n.kind() == rnix::SyntaxKind::TOKEN_WHITESPACE)
.map(|n| n.text_range().start().into())
.unwrap_or_else(|| node.text_range().start().into());
let after = node
.next_sibling_or_token()
.filter(|n| n.kind() == rnix::SyntaxKind::TOKEN_WHITESPACE)
.map(|n| n.text_range().end().into())
.unwrap_or_else(|| node.text_range().end().into());
(before, after)
}
fn remove_node(span: &rnix::SyntaxNode) -> (usize, usize) {
// TODO: how to remove brackets around the node?
fn eat_to_bracket(node: &rnix::SyntaxNode, backwards: bool) -> (TextSize, usize) {
let mut span = NodeOrToken::Node(node.clone());
let mut bracket = span.clone();
let mut brackets = 0;
loop {
match if backwards { span.prev_sibling_or_token() } else { span.next_sibling_or_token() } {
Some(NodeOrToken::Token(t)) => match t.kind() {
rnix::SyntaxKind::TOKEN_WHITESPACE => span = NodeOrToken::Token(t),
rnix::SyntaxKind::TOKEN_L_PAREN if backwards => {
span = NodeOrToken::Token(t);
bracket = span.clone();
brackets += 1;
},
rnix::SyntaxKind::TOKEN_R_PAREN if !backwards => {
span = NodeOrToken::Token(t);
bracket = span.clone();
brackets += 1;
},
_ => break,
},
_ => break,
}
}
(if backwards { bracket.text_range().start() } else { bracket.text_range().end() }, brackets)
}
let (before, after) = match (eat_to_bracket(span, true), eat_to_bracket(span, false)) {
((before, n1), (after, n2)) if n1 == n2 && n1 != 0 => (before.into(), after.into()),
_ => match (span.prev_sibling_or_token(), span.next_sibling_or_token()) {
(Some(prev), Some(next))
if prev.kind() == rnix::SyntaxKind::TOKEN_WHITESPACE
&& next.kind() == rnix::SyntaxKind::TOKEN_WHITESPACE
=> {
if prev.to_string().lines().count() < next.to_string().lines().count() {
(Into::<usize>::into(span.text_range().start() - prev.text_range().len()) + previous_indentation(&span).unwrap_or(0)
, Into::<usize>::into(span.text_range().end()) + next_indentation(&span).unwrap_or(0))
} else {
(Into::<usize>::into(span.text_range().start()) - previous_indentation(&span).unwrap_or(0),
Into::<usize>::into(span.text_range().end() + next.text_range().len()) - next_indentation(&span).unwrap_or(0))
}
}
_ => (span.text_range().start().into(), span.text_range().end().into())
}
};
(before, after)
// ( Into::<usize>::into(span.text_range().start()) - before
// , Into::<usize>::into(span.text_range().end()) + after
// )
}
fn previous_indentation(node: &rnix::SyntaxNode) -> Option<usize> {
let whitespace_token = node.prev_sibling_or_token()?;
if whitespace_token.kind() == rnix::SyntaxKind::TOKEN_WHITESPACE {
Some(whitespace_token.to_string().lines().last().unwrap().len())
} else {
None
}
}
fn next_indentation(node: &rnix::SyntaxNode) -> Option<usize> {
let whitespace_token = node.next_sibling_or_token()?;
if whitespace_token.kind() == rnix::SyntaxKind::TOKEN_WHITESPACE {
Some(whitespace_token.to_string().lines().last().unwrap().len())
} else {
None
}
}
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