2020-06-04 16:39:33 -04:00
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use quote::ToTokens;
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use std::fs;
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2020-06-05 22:58:14 -04:00
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use std::path::Path;
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2020-06-06 09:49:01 -04:00
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use std::sync::Arc;
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2020-06-04 16:39:33 -04:00
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2020-06-05 22:58:14 -04:00
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use crate::config::Config;
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2020-06-04 16:39:33 -04:00
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use crate::error::*;
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use crate::optimizer::Optimizer;
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use crate::parser::Parser;
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use crate::resolver::Resolver;
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2020-06-06 09:49:01 -04:00
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use crate::translator::{Translator, TranslatedSource};
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2020-06-06 12:25:52 -04:00
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use crate::util::{read_to_string, rustfmt_block};
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2020-06-04 16:39:33 -04:00
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2020-06-05 22:58:14 -04:00
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#[derive(Default)]
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2020-06-04 16:39:33 -04:00
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pub struct Compiler {
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2020-06-05 22:58:14 -04:00
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config: Config
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2020-06-04 16:39:33 -04:00
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}
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impl Compiler {
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pub fn new() -> Self {
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Self::default()
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}
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2020-06-05 22:58:14 -04:00
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pub fn with_config(config: Config) -> Self {
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Self { config }
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2020-06-04 16:39:33 -04:00
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}
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2020-06-06 09:49:01 -04:00
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fn translate_file_contents(&self, input: &Path) -> Result<TranslatedSource, Error> {
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2020-06-05 22:58:14 -04:00
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let parser = Parser::new().delimiter(self.config.delimiter);
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let translator = Translator::new().escape(self.config.escape);
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2020-06-06 12:25:52 -04:00
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let content = read_to_string(input)
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2020-06-06 09:49:01 -04:00
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.chain_err(|| format!("Failed to open template file: {:?}", input))?;
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let stream = parser.parse(&*content);
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translator.translate(stream)
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}
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pub fn compile_file(&self, template_dir: &Path, input: &Path, output: &Path) -> Result<(), Error> {
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// TODO: introduce cache system
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2020-06-06 10:43:41 -04:00
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let input = input.canonicalize()?;
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2020-06-06 11:43:10 -04:00
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let include_handler = Arc::new(|child_file: &Path| -> Result<_, Error> {
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Ok(self.translate_file_contents(&*child_file)?.ast)
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2020-06-06 09:49:01 -04:00
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});
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let resolver = Resolver::new().include_handler(include_handler);
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2020-06-04 16:39:33 -04:00
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let optimizer = Optimizer::new();
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let compile_file = |input: &Path, output: &Path| -> Result<(), Error> {
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2020-06-06 09:49:01 -04:00
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let mut tsource = self.translate_file_contents(input)?;
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2020-06-04 16:39:33 -04:00
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2020-06-06 11:43:10 -04:00
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resolver.resolve(template_dir, &*input, &mut tsource.ast)?;
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2020-06-04 16:39:33 -04:00
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optimizer.optimize(&mut tsource.ast);
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if let Some(parent) = output.parent() {
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fs::create_dir_all(parent)?;
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}
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if output.exists() {
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fs::remove_file(output)?;
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}
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let string = tsource.ast.into_token_stream().to_string();
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fs::write(output, rustfmt_block(&*string).unwrap_or(string))?;
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Ok(())
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};
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compile_file(&*input, &*output)
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.chain_err(|| "Failed to compile template.")
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.map_err(|mut e| {
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e.source = fs::read_to_string(&*input).ok();
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e.source_file = Some(input.to_owned());
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e
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})?;
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Ok(())
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}
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}
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