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#[macro_use] extern crate itertools;
extern crate toml;
extern crate serde;
#[macro_use] extern crate serde_derive;
extern crate tera;
mod storage_type;
mod aggregate_type;
mod spec;
mod result;
mod input;
mod output;
mod renderer;
mod code_gen;
use std::env;
use std::path::Path;
use std::fs::File;
use std::io::Write;
pub use result::{GenResult, GenError, SaveResult, SaveError};
use code_gen::CodeGen;
pub struct GeneratedCode {
text: String,
}
fn combine_modules(m: &Vec<(String, String)>) -> String {
let module_text = m.iter().map(|&(ref name, ref contents)| {
if name == "mod" {
contents.clone()
} else {
let indented = itertools::join(
contents.split("\n").map(|s| {
if s == "" {
"".to_string()
} else {
format!(" {}", s)
}
}), "\n");
format!("mod {} {{\n{}}}", name, indented)
}
});
itertools::join(module_text, "\n\n")
}
impl GeneratedCode {
pub fn generate(s: &str) -> GenResult<Self> {
let code_gen = CodeGen::new(s)?;
let modules = code_gen.render()?;
let text = combine_modules(&modules);
Ok(Self {
text,
})
}
pub fn save(&self, filename: &str) -> SaveResult<()> {
let env_error_str = "This method must be called from a build script.";
let out_dir = env::var("OUT_DIR")
.map_err(|e| SaveError::VarError(e, env_error_str))?;
let dest_path = Path::new(&out_dir).join(filename);
let mut file = File::create(&dest_path)
.map_err(|e| SaveError::FailedToCreateFile(dest_path.clone(), e))?;
file.write_all(self.text.as_bytes())
.map_err(|e| SaveError::FailedToWriteFile(dest_path.clone(), e))?;
#[cfg(unix)]
{
let manifest_dir = env::var("CARGO_MANIFEST_DIR")
.map_err(|e| SaveError::VarError(e, env_error_str))?;
let code_gen_symlink_path = Path::new(&manifest_dir).join(".generated.rs");
if let Ok(()) = ::std::fs::remove_file(&code_gen_symlink_path) {}
::std::os::unix::fs::symlink(&dest_path, code_gen_symlink_path)
.map_err(|e| SaveError::FailedToMakeSymlink(dest_path.to_path_buf(), e))?;
}
Ok(())
}
}
#[derive(Debug)]
pub enum Error {
Gen(GenError),
Save(SaveError),
}
pub fn generate(spec: &str, filename: &str) -> Result<(), Error> {
let code = GeneratedCode::generate(spec).map_err(Error::Gen)?;
code.save(filename).map_err(Error::Save)
}
#[macro_export]
macro_rules! generate_entity_store {
($spec:expr, $filename:expr) => {
::entity_store_code_gen::generate(include_str!($spec), $filename).unwrap()
}
}