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132 lines
4.4 KiB
132 lines
4.4 KiB
use crate::ast::Module; |
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use crate::generator; |
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use crate::lexer; |
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use crate::parser; |
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use crate::Lib; |
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use crate::PathBuf; |
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use std::env; |
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/** |
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* Copyright 2021 Garrit Franke |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* https://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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use std::fs::File; |
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use std::io::Read; |
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use std::io::Write; |
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pub struct Builder { |
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in_file: PathBuf, |
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modules: Vec<Module>, |
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} |
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impl Builder { |
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pub fn new(entrypoint: PathBuf) -> Self { |
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Self { |
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in_file: entrypoint, |
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modules: Vec::new(), |
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} |
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} |
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fn get_base_path(&self) -> Result<PathBuf, String> { |
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Ok(self |
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.in_file |
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.parent() |
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.ok_or("File does not have a parent")? |
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.to_path_buf()) |
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} |
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pub fn build(&mut self) -> Result<(), String> { |
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let in_file = self.in_file.clone(); |
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// Resolve path deltas between working directory and entrypoint |
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let base_directory = self.get_base_path()?; |
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if let Ok(resolved_delta) = in_file.strip_prefix(&base_directory) { |
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// TODO: This error could probably be handled better |
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let _ = env::set_current_dir(base_directory); |
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self.in_file = resolved_delta.to_path_buf(); |
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} |
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self.build_module(self.in_file.clone())?; |
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// Append standard library |
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self.build_stdlib(); |
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Ok(()) |
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} |
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fn build_module(&mut self, file_path: PathBuf) -> Result<Module, String> { |
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// TODO: This method can probably cleaned up quite a bit |
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// In case the module is a directory, we have to append the filename of the entrypoint |
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let resolved_file_path = if file_path.is_dir() { |
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file_path.join("module.sb") |
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} else { |
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file_path |
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}; |
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let mut file = File::open(&resolved_file_path) |
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.map_err(|_| format!("Could not open file: {}", resolved_file_path.display()))?; |
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let mut contents = String::new(); |
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file.read_to_string(&mut contents) |
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.expect("Could not read file"); |
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let tokens = lexer::tokenize(&contents); |
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let module = parser::parse( |
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tokens, |
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Some(contents), |
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resolved_file_path.display().to_string(), |
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)?; |
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for import in &module.imports { |
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// Build module relative to the current file |
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let mut import_path = resolved_file_path |
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.parent() |
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.unwrap() |
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.join(PathBuf::from(import)); |
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if import_path.is_dir() { |
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import_path = import_path.join("module.sb"); |
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} else if !import_path.ends_with(".sb") { |
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import_path.set_extension("sb"); |
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} |
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self.build_module(import_path)?; |
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} |
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self.modules.push(module.clone()); |
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Ok(module) |
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} |
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pub(crate) fn generate(&mut self, out_file: PathBuf) -> Result<(), String> { |
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let mut mod_iter = self.modules.iter(); |
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// TODO: We shouldn't clone here |
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let mut condensed = mod_iter.next().ok_or("No module specified")?.clone(); |
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for module in mod_iter { |
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condensed.merge_with(module.clone()); |
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} |
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let output = generator::generate(condensed); |
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let mut file = std::fs::File::create(out_file).expect("create failed"); |
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file.write_all(output.as_bytes()).expect("write failed"); |
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file.flush().map_err(|_| "Could not flush file".into()) |
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} |
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fn build_stdlib(&mut self) { |
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let assets = Lib::iter(); |
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for file in assets { |
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let stdlib_raw = |
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Lib::get(&file).expect("Standard library not found. This should not occur."); |
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let stblib_str = |
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std::str::from_utf8(&stdlib_raw).expect("Could not interpret standard library."); |
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let stdlib_tokens = lexer::tokenize(&stblib_str); |
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let module = parser::parse(stdlib_tokens, Some(stblib_str.into()), file.to_string()) |
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.expect("Could not parse stdlib"); |
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self.modules.push(module); |
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} |
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} |
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}
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