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|
use std::ffi::{OsStr, OsString};
mod methods;
mod openapi;
mod structs;
use heck::ToSnakeCase;
use openapi::*;
fn main() -> eyre::Result<()> {
let spec = get_spec()?;
let mut s = String::new();
s.push_str(&methods::create_methods(&spec)?);
s.push_str(&structs::create_structs(&spec)?);
save_generated(&s)?;
Ok(())
}
fn get_spec() -> eyre::Result<OpenApiV2> {
let path = std::env::var_os("FORGEJO_API_SPEC_PATH")
.unwrap_or_else(|| OsString::from("./swagger.v1.json"));
let file = std::fs::read(path)?;
let spec = serde_json::from_slice::<OpenApiV2>(&file)?;
spec.validate()?;
Ok(spec)
}
fn save_generated(contents: &str) -> eyre::Result<()> {
let path = std::env::var_os("FORGEJO_API_GENERATED_PATH")
.unwrap_or_else(|| OsString::from("./src/generated.rs"));
std::fs::write(path.as_os_str(), contents)?;
run_rustfmt_on(path.as_os_str());
Ok(())
}
fn run_rustfmt_on(path: &OsStr) {
let mut rustfmt = std::process::Command::new("rustfmt");
rustfmt.arg(path);
rustfmt.args(["--edition", "2021"]);
if let Err(e) = rustfmt.status() {
println!("Tried to format {path:?}, but failed to do so! :(");
println!("Error:\n{e}");
}
}
fn schema_ref_type_name(spec: &OpenApiV2, schema: &MaybeRef<Schema>) -> eyre::Result<String> {
let (name, schema) = deref_definition(spec, &schema)?;
schema_type_name(spec, name, schema)
}
fn schema_type_name(
spec: &OpenApiV2,
definition_name: Option<&str>,
schema: &Schema,
) -> eyre::Result<String> {
if let Some(ty) = &schema._type {
match ty {
SchemaType::One(prim) => {
let name = match prim {
Primitive::String => match schema.format.as_deref() {
Some("date") => "time::Date",
Some("date-time") => "time::OffsetDateTime",
_ => "String",
}
.to_string(),
Primitive::Number => match schema.format.as_deref() {
Some("float") => "f32",
Some("double") => "f64",
_ => "f64",
}
.to_string(),
Primitive::Integer => match schema.format.as_deref() {
Some("int32") => "u32",
Some("int64") => "u64",
_ => "u32",
}
.to_string(),
Primitive::Boolean => "bool".to_string(),
Primitive::Array => {
let item_name = match &schema.items {
Some(item_schema) => schema_ref_type_name(spec, item_schema)?,
None => "serde_json::Value".into(),
};
format!("Vec<{item_name}>")
}
Primitive::Null => "()".to_string(),
Primitive::Object => {
match (&schema.title, definition_name) {
// Some of the titles are actually descriptions; not sure why
// Checking for a space filters that out
(Some(title), _) if !title.contains(' ') => title.to_string(),
(_, Some(definition_name)) => definition_name.to_string(),
(_, None) => "serde_json::Map<String, serde_json::Value>".to_string(),
}
}
};
Ok(name.to_owned())
}
SchemaType::List(_) => todo!(),
}
} else {
Ok("()".into())
}
}
fn deref_definition<'a>(
spec: &'a OpenApiV2,
r: &'a MaybeRef<Schema>,
) -> eyre::Result<(Option<&'a str>, &'a Schema)> {
let r = match r {
MaybeRef::Value { value } => return Ok((None, value)),
MaybeRef::Ref { _ref } => _ref,
};
let name = r
.strip_prefix("#/definitions/")
.ok_or_else(|| eyre::eyre!("invalid definition reference"))?;
let global_definitions = spec
.definitions
.as_ref()
.ok_or_else(|| eyre::eyre!("no global definitions"))?;
let definition = global_definitions
.get(name)
.ok_or_else(|| eyre::eyre!("referenced definition does not exist"))?;
Ok((Some(name), definition))
}
fn schema_is_string(spec: &OpenApiV2, schema: &MaybeRef<Schema>) -> eyre::Result<bool> {
let (_, schema) = deref_definition(spec, schema)?;
let is_str = match schema._type {
Some(SchemaType::One(Primitive::String)) => true,
_ => false,
};
Ok(is_str)
}
fn sanitize_ident(s: &str) -> String {
let mut s = s.to_snake_case();
let keywords = [
"as",
"break",
"const",
"continue",
"crate",
"else",
"enum",
"extern",
"false",
"fn",
"for",
"if",
"impl",
"in",
"let",
"loop",
"match",
"mod",
"move",
"mut",
"pub",
"ref",
"return",
"self",
"Self",
"static",
"struct",
"super",
"trait",
"true",
"type",
"unsafe",
"use",
"where",
"while",
"abstract",
"become",
"box",
"do",
"final",
"macro",
"override",
"priv",
"typeof",
"unsized",
"virtual",
"yield",
"async",
"await",
"dyn",
"try",
"macro_rules",
"union",
];
if s == "self" {
s = "this".into();
}
if keywords.contains(&&*s) {
s.insert_str(0, "r#");
}
s
}
|
