341 lines
11 KiB
Rust
341 lines
11 KiB
Rust
pub mod context;
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pub mod cycles;
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pub mod names;
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pub mod parsers;
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pub mod readers;
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pub mod types;
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pub mod unparsers;
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use crate::*;
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use crate::compiler::context::*;
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use crate::gen::Language;
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use crate::gen::schema;
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use crate::gen::schema::*;
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use crate::syntax::block::{Formatter, Item};
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use crate::syntax::block::constructors::*;
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use glob::glob;
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use preserves::value::BinarySource;
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use preserves::value::IOBinarySource;
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use preserves::value::Map;
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use preserves::value::Set;
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use preserves::value::Reader;
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use std::fs::DirBuilder;
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use std::fs::File;
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use std::io;
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use std::io::Read;
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use std::io::Write;
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use std::path::PathBuf;
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pub type ModulePath = Vec<String>;
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pub trait Plugin: std::fmt::Debug {
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fn generate_module(&self, _module_ctxt: &mut ModuleContext) {}
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fn generate_definition(
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&self,
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module_ctxt: &mut ModuleContext,
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definition_name: &str,
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definition: &Definition,
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);
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}
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pub struct LanguageTypes {
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pub fallback: Option<Box<dyn Fn(&str) -> Set<String>>>,
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pub definitions: Map<String, Box<dyn Fn(&str) -> Set<String>>>,
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}
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impl std::fmt::Debug for LanguageTypes {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
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f.debug_struct("LanguageTypes")
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.field("fallback", &self.fallback.as_ref().map(|f| f("_")))
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.field("definitions", &self.definitions.iter().map(
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|(k, f)| (k.clone(), f("_"))).collect::<Map<String, Set<String>>>())
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.finish()
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}
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}
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#[derive(Debug)]
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pub struct ExternalModule {
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pub path: ModulePath,
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pub rust_namespace: String,
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pub rust_language_types: LanguageTypes,
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}
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impl ExternalModule {
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pub fn new(path: ModulePath, rust_namespace: &str) -> Self {
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ExternalModule {
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path,
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rust_namespace: rust_namespace.to_owned(),
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rust_language_types: LanguageTypes {
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fallback: None,
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definitions: Map::new(),
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},
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}
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}
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pub fn set_fallback_language_types<F: 'static + Fn(&str) -> Set<String>>(
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mut self,
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f: F,
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) -> Self {
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self.rust_language_types.fallback = Some(Box::new(f));
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self
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}
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pub fn set_definition_language_types<F: 'static + Fn(&str) -> Set<String>>(
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mut self,
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d: &str,
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f: F,
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) -> Self {
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if self.rust_language_types.definitions.insert(d.to_owned(), Box::new(f)).is_some() {
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panic!("Duplicate language types definition installed: {:?} {:?}", &self.path, d);
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}
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self
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}
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}
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#[derive(Debug)]
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pub struct CompilerConfig {
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pub bundle: Map<ModulePath, Schema>,
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pub output_dir: PathBuf,
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pub fully_qualified_module_prefix: String,
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pub support_crate: String,
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pub external_modules: Map<ModulePath, ExternalModule>,
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pub plugins: Vec<Box<dyn Plugin>>,
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}
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pub fn load_schema_or_bundle(bundle: &mut Map<ModulePath, Schema>, i: &PathBuf) -> io::Result<()> {
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let mut f = File::open(&i)?;
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let mut src = IOBinarySource::new(&mut f);
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let mut reader = src.packed_iovalues();
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let blob = reader.demand_next(false)?;
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let language = Language::default();
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if let Ok(s) = language.parse(&blob) {
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let prefix = i.file_stem().ok_or_else(
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|| io::Error::new(io::ErrorKind::InvalidData,
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format!("Bad schema file stem: {:?}", i)))?
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.to_str().ok_or_else(
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|| io::Error::new(io::ErrorKind::InvalidData,
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format!("Invalid UTF-8 in schema file name: {:?}", i)))?;
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bundle.insert(vec![prefix.to_owned()], s);
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} else if let Ok(Bundle { modules }) = language.parse(&blob) {
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for (ModulePath(k), v) in modules.0 {
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bundle.insert(k, v);
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}
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} else {
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return Err(io::Error::new(io::ErrorKind::InvalidData,
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format!("Invalid schema binary blob {:?}", i)));
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}
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Ok(())
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}
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impl CompilerConfig {
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pub fn new(
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output_dir: PathBuf,
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fully_qualified_module_prefix: String,
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) -> Self {
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CompilerConfig {
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bundle: Map::new(),
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output_dir: output_dir,
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fully_qualified_module_prefix: fully_qualified_module_prefix,
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support_crate: "preserves_schema".to_owned(),
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external_modules: Map::new(),
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plugins: vec![
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Box::new(types::TypePlugin),
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Box::new(readers::ReaderPlugin),
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Box::new(parsers::ParserPlugin),
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Box::new(unparsers::UnparserPlugin),
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],
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}
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}
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pub fn add_external_module(&mut self, m: ExternalModule) {
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let path = m.path.clone();
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if self.external_modules.insert(path.clone(), m).is_some() {
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panic!("Duplicate external module installed: {:?}", path)
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}
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}
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pub fn load_schemas_and_bundles(&mut self, inputs: &Vec<PathBuf>) -> io::Result<()> {
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for i in inputs {
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load_schema_or_bundle(&mut self.bundle, i)?;
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}
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Ok(())
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}
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fn build_type_cache(&self) -> Map<Ref, types::TDefinition> {
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self.bundle.iter().flat_map(|(modpath, s)| {
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let modpath = ModulePath(modpath.clone());
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s.definitions.0.iter().map(move |(name, def)| {
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let ty = types::definition_type(&modpath, name, def);
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(ty.self_ref.clone(), ty)
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})
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}).collect()
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}
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fn generate_definition(
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&self,
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b: &mut BundleContext,
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k: &ModulePath,
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v: &Schema,
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n: &str,
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d: &Definition,
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mode: ModuleContextMode,
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generated: &mut Map<ModuleContextMode, Vec<Item>>,
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) {
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b.generate_module(k, v, mode, generated, |m| {
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for plugin in self.plugins.iter() {
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plugin.generate_definition(m, n, d);
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}
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});
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}
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}
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pub fn expand_inputs(globs: &Vec<String>) -> io::Result<Vec<PathBuf>> {
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let mut result = Vec::new();
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for g in globs.iter() {
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for p in glob(g).map_err(|e| io::Error::new(io::ErrorKind::InvalidData, format!("{}", e)))? {
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result.push(p.map_err(glob::GlobError::into_error)?)
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}
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}
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Ok(result)
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}
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fn write_if_changed(output_path: &PathBuf, contents: &[u8]) -> io::Result<()> {
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if output_path.exists() {
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if let Ok(mut f) = File::open(output_path) {
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let mut existing_contents = Vec::new();
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f.read_to_end(&mut existing_contents)?;
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if existing_contents == contents {
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return Ok(());
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}
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}
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}
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let mut f = File::create(output_path)?;
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f.write_all(contents)
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}
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impl Ref {
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pub fn qualify(&self, default_module_path: &schema::ModulePath) -> Ref {
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if self.module.0.is_empty() {
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Ref { module: default_module_path.clone(), name: self.name.clone() }
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} else {
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self.clone()
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}
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}
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}
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impl Schema {
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pub fn has_embedded_type(&self) -> bool {
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self.embedded_type != EmbeddedTypeName::False
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}
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}
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pub fn compile(config: &CompilerConfig) -> io::Result<()> {
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let mut b = BundleContext::new(config);
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for (k, v) in config.bundle.iter() {
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let mut output_path = config.output_dir.clone();
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output_path.extend(k);
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let module_name = output_path.file_stem().unwrap().to_str().unwrap().to_owned();
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let module_name = names::render_modname(&module_name);
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output_path.set_file_name(format!("{}.rs", module_name));
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DirBuilder::new().recursive(true).create(output_path.parent().unwrap())?;
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//---------------------------------------------------------------------------
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let mut generated = Map::new();
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b.generate_module(k, v, ModuleContextMode::TargetModule, &mut generated, |m| {
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for plugin in config.plugins.iter() {
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plugin.generate_module(m);
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}
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});
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for (n, d) in &v.definitions.0 {
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use ModuleContextMode::*;
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config.generate_definition(&mut b, k, v, n, d, TargetToplevel, &mut generated);
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config.generate_definition(&mut b, k, v, n, d, TargetGeneric, &mut generated);
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}
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//---------------------------------------------------------------------------
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let mut lines: Vec<String> = Vec::new();
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lines.push(Formatter::to_string(vertical(false, seq![
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"#![allow(unused_parens)]",
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"#![allow(unused_imports)]",
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"",
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"use std::convert::TryFrom;",
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format!("use {}::support as _support;", &config.support_crate),
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"use _support::Deserialize;",
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"use _support::Parse;",
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"use _support::Unparse;",
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"use _support::preserves;",
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"use preserves::value::Domain;",
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"use preserves::value::NestedValue;",
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""])));
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let mut emit_items = |items: Vec<Item>| {
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if !items.is_empty() {
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lines.push(Formatter::to_string(vertical(true, seq(items))));
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lines.push("".to_owned());
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}
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};
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emit_items(generated.remove(&ModuleContextMode::TargetModule).unwrap());
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emit_items(generated.remove(&ModuleContextMode::TargetToplevel).unwrap());
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emit_items(generated.remove(&ModuleContextMode::TargetGeneric).unwrap());
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{
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let contents = lines.join("\n");
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write_if_changed(&output_path, contents.as_bytes())?;
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}
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}
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{
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let mut mod_rs = config.output_dir.clone();
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mod_rs.extend(vec!["mod.rs"]);
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let mut lines = Vec::new();
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for modpath in config.bundle.keys() {
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lines.push(format!("pub mod {};", names::render_modname(modpath.last().unwrap())));
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}
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lines.push("".to_owned());
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lines.push(format!("use {}::support as _support;", &config.support_crate));
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lines.push("use _support::preserves;".to_owned());
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lines.push("".to_owned());
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lines.push("#[allow(non_snake_case)]".to_owned());
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lines.push(Formatter::to_string(item(seq![
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"pub struct ", b.language_struct_name(), anglebrackets!["N: preserves::value::NestedValue"], " ",
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vertical(false, braces(b.literals.iter().map(
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|(value, name)| item(format!("pub {}: N /* {:?} */", name, value))).collect()))
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])));
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lines.push("".to_owned());
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lines.push(Formatter::to_string(item(seq![
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"impl", anglebrackets!["N: preserves::value::NestedValue"],
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" Default for ", b.language_struct_name(), "<N> ", codeblock![
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seq!["fn default() -> Self ", codeblock![
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seq![b.language_struct_name(), " ", vertical(false, braces(b.literals.iter().map(|(value, name)| {
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let bs = preserves::value::PackedWriter::encode_iovalue(&value).unwrap();
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item(format!("{}: /* {:?} */ _support::decode_lit(&vec!{:?}).unwrap()",
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name,
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value,
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bs))
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}).collect()))]
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]]
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]
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])));
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lines.push("".to_owned());
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let contents = lines.join("\n");
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write_if_changed(&mod_rs, contents.as_bytes())?;
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}
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Ok(())
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}
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