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#![deny(missing_docs)]
#![warn(rust_2018_idioms)]
#![allow(clippy::option_option)]
use gurkle_parser::schema::parse_schema;
use introspection_response::IntrospectionResponse;
use proc_macro2::TokenStream;
use quote::*;
use schema::Schema;
mod codegen;
mod codegen_options;
pub mod deprecation;
pub mod schema;
mod constants;
mod generated_module;
mod introspection_response;
pub mod normalization;
mod query;
mod type_qualifiers;
#[cfg(test)]
mod tests;
pub use crate::codegen_options::GraphQLClientCodegenOptions;
use std::{io, path::Path};
use thiserror::Error;
#[derive(Debug, Error)]
#[error("{0}")]
struct GeneralError(String);
type BoxError = Box<dyn std::error::Error + Send + Sync + 'static>;
pub fn generate_module_token_stream(
query_path: Vec<std::path::PathBuf>,
schema_path: &Path,
options: GraphQLClientCodegenOptions,
) -> Result<TokenStream, BoxError> {
let schema_extension = schema_path
.extension()
.and_then(std::ffi::OsStr::to_str)
.unwrap_or("INVALID");
let schema: Schema = {
let schema_string = read_file(schema_path)?;
let schema = match schema_extension {
"graphql" | "gql" => {
let s = parse_schema(&schema_string).map_err(|parser_error| GeneralError(format!("Parser error: {}", parser_error)))?;
Schema::from(s)
}
"json" => {
let parsed: IntrospectionResponse = serde_json::from_str(&schema_string)?;
Schema::from(parsed)
}
extension => return Err(GeneralError(format!("Unsupported extension for the GraphQL schema: {} (only .json and .graphql are supported)", extension)).into())
};
schema
};
let query_string = query_path
.iter()
.map(|x| read_file(x))
.collect::<Result<Vec<_>, _>>()?
.join("\n\n");
let query = gurkle_parser::parse_query(&query_string)
.map_err(|err| GeneralError(format!("Query parser error: {}", err)))?;
let query = crate::query::resolve(&schema, &query)?;
let operations = options
.operation_name
.as_ref()
.and_then(|operation_name| query.select_operation(operation_name, *options.normalization()))
.map(|op| vec![op]);
let operations = match operations {
Some(ops) => ops,
None => query.operations().collect(),
};
let mut modules = Vec::with_capacity(operations.len());
for operation in &operations {
let generated = generated_module::GeneratedModule {
schema: &schema,
resolved_query: &query,
operation: &operation.1.name,
options: &options,
}
.to_token_stream()?;
modules.push(generated);
}
let modules = quote! { #(#modules)* };
Ok(modules)
}
#[derive(Debug, Error)]
enum ReadFileError {
#[error(
"Could not find file with path: {}\
Hint: file paths in the GraphQLRequest attribute are relative to the project root (location of the Cargo.toml). Example: query_path = \"src/my_query.graphql\".",
path
)]
FileNotFound {
path: String,
#[source]
io_error: io::Error,
},
#[error("Error reading file at: {}", path)]
ReadError {
path: String,
#[source]
io_error: io::Error,
},
}
fn read_file(path: &Path) -> Result<String, ReadFileError> {
use std::fs;
use std::io::prelude::*;
let mut out = String::new();
let mut file = fs::File::open(path).map_err(|io_error| ReadFileError::FileNotFound {
io_error,
path: path.display().to_string(),
})?;
file.read_to_string(&mut out)
.map_err(|io_error| ReadFileError::ReadError {
io_error,
path: path.display().to_string(),
})?;
Ok(out)
}