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#![recursion_limit = "128"]
extern crate proc_macro;
extern crate proc_macro2;
#[macro_use]
mod macros;
mod nullable_type;
mod pretty_print;
mod walk_ast;
use self::walk_ast::{
find_interface_implementors, find_special_scalar_types, gen_juniper_code, gen_query_trails,
Output,
};
use graphql_parser::parse_schema;
use proc_macro2::TokenStream;
#[proc_macro]
pub fn graphql_schema_from_file(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
let input: TokenStream = input.into();
let file = input.to_string().replace("\"", "");
let pwd = std::env::current_dir().unwrap();
let path = pwd.join(file);
match read_file(&path) {
Ok(schema) => parse_and_gen_schema(schema),
Err(err) => panic!("{}", err),
}
}
#[proc_macro]
pub fn graphql_schema(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
let input: TokenStream = input.into();
let schema = input.to_string();
parse_and_gen_schema(schema)
}
fn parse_and_gen_schema(schema: String) -> proc_macro::TokenStream {
let doc = match parse_schema(&schema) {
Ok(doc) => doc,
Err(parse_error) => panic!("{}", parse_error),
};
let special_scalars = find_special_scalar_types(&doc);
let interface_implementors = find_interface_implementors(&doc);
let mut output = Output::new(special_scalars, interface_implementors);
gen_query_trails(&doc, &mut output);
gen_juniper_code(doc, &mut output);
let out: proc_macro::TokenStream = output.tokens().into_iter().collect::<TokenStream>().into();
if debugging_enabled() {
self::pretty_print::code_gen_debug(out.to_string());
}
out
}
fn read_file(path: &std::path::PathBuf) -> Result<String, std::io::Error> {
use std::{fs::File, io::prelude::*};
let mut file = File::open(path)?;
let mut contents = String::new();
file.read_to_string(&mut contents)?;
Ok(contents)
}
fn debugging_enabled() -> bool {
if let Ok(val) = std::env::var("JUNIPER_FROM_SCHEMA_DEBUG") {
if &val == "1" {
return true;
}
}
false
}