openapi_nexus/generators/rust/ureq/
codegen.rs

1//! Rust ureq code generator: IR → idiomatic Rust + ureq (synchronous).
2
3use std::error::Error;
4
5use heck::ToKebabCase as _;
6
7use super::runtime::runtime_files;
8use super::sigil_emit_api::{emit_method_body, ureq_backend_config};
9use crate::codegen::traits::code_generator::CodeGenerator;
10use crate::codegen::traits::file_writer::{FileInfo, FileWriter};
11use crate::codegen::{GeneratorType, Language};
12use crate::generators::rust::common::{
13    config::RustGeneratorConfig, emit_api, emit_models, project_files,
14};
15use crate::ir::types::{IrInfo, IrSpec};
16
17/// Rust ureq code generator (synchronous).
18#[derive(Debug, Clone)]
19pub struct RustUreqCodeGenerator {
20    config: RustGeneratorConfig,
21}
22
23impl RustUreqCodeGenerator {
24    pub fn new(config: toml::value::Table) -> Self {
25        Self {
26            config: RustGeneratorConfig::from(config),
27        }
28    }
29
30    fn crate_name(&self, info: &IrInfo) -> String {
31        self.config
32            .crate_name
33            .clone()
34            .unwrap_or_else(|| info.title.to_kebab_case())
35    }
36
37    fn generate_ir(&self, ir: &IrSpec) -> Result<Vec<FileInfo>, Box<dyn Error + Send + Sync>> {
38        let header = project_files::render_file_header(&ir.info);
39        let crate_name = self.crate_name(&ir.info);
40        let backend_config = ureq_backend_config();
41
42        let mut files = Vec::new();
43
44        files.extend(
45            emit_models::generate_model_files(ir, &header, &self.config).map_err(|msg| {
46                Box::<dyn Error + Send + Sync>::from(format!("emit_models: {msg}"))
47            })?,
48        );
49
50        let response_extra = self
51            .config
52            .extra_derives
53            .as_ref()
54            .and_then(|e| e.response_structs.as_ref());
55        files.extend(
56            emit_api::generate_api_files(
57                ir,
58                &header,
59                &backend_config,
60                response_extra,
61                &emit_method_body,
62            )
63            .map_err(|msg| Box::<dyn Error + Send + Sync>::from(format!("emit_api: {msg}")))?,
64        );
65
66        files.extend(runtime_files(&header));
67
68        files.push(cargo_toml_file(&crate_name, &ir.info, &self.config));
69        files.push(project_files::lib_rs_file(&header));
70        files.push(project_files::readme_file(&ir.info));
71
72        Ok(files)
73    }
74}
75
76impl CodeGenerator for RustUreqCodeGenerator {
77    fn language(&self) -> Language {
78        Language::Rust
79    }
80
81    fn generator_type(&self) -> GeneratorType {
82        GeneratorType::RustUreq
83    }
84
85    fn generate(&self, ir: &IrSpec) -> Result<Vec<FileInfo>, Box<dyn Error + Send + Sync>> {
86        self.generate_ir(ir)
87    }
88}
89
90impl FileWriter for RustUreqCodeGenerator {
91    fn source_dir(&self) -> Option<&str> {
92        Some("src")
93    }
94}
95
96fn cargo_toml_file(crate_name: &str, info: &IrInfo, config: &RustGeneratorConfig) -> FileInfo {
97    use crate::generators::rust::common::config::WorkspaceDepsMode;
98
99    let description = info
100        .description
101        .as_deref()
102        .unwrap_or("Generated Rust SDK.")
103        .lines()
104        .next()
105        .unwrap_or("Generated Rust SDK.");
106    let workspace = config.workspace_mode.unwrap_or(false);
107    let deps_mode = config.workspace_deps.as_ref().cloned().unwrap_or_default();
108
109    let pkg_section = if workspace {
110        format!(
111            r#"[package]
112name = "{crate_name}"
113version.workspace = true
114edition.workspace = true
115description = "{description}"
116"#,
117        )
118    } else {
119        format!(
120            r#"[package]
121name = "{crate_name}"
122version = "0.1.0"
123edition = "2024"
124description = "{description}"
125"#,
126        )
127    };
128
129    let deps_section = match deps_mode {
130        WorkspaceDepsMode::Full => r#"
131[dependencies]
132ureq.workspace = true
133serde.workspace = true
134serde_json.workspace = true
135serde_repr.workspace = true
136"#
137        .to_string(),
138        WorkspaceDepsMode::WorkspaceVersion => r#"
139[dependencies]
140ureq = { workspace = true, features = ["json"] }
141serde = { workspace = true, features = ["derive"] }
142serde_json.workspace = true
143serde_repr.workspace = true
144"#
145        .to_string(),
146        WorkspaceDepsMode::Explicit => r#"
147[dependencies]
148ureq = { version = "3", features = ["json"] }
149serde = { version = "1", features = ["derive"] }
150serde_json = "1"
151serde_repr = "0.1"
152"#
153        .to_string(),
154    };
155
156    let mut content = format!("{pkg_section}{deps_section}");
157
158    if let Some(extra) = &config.extra_derives {
159        extra.warn_missing_dependencies();
160        for (name, spec) in extra.all_dependencies() {
161            match deps_mode {
162                WorkspaceDepsMode::Full | WorkspaceDepsMode::WorkspaceVersion => {
163                    content.push_str(&format!("{name}.workspace = true\n"));
164                }
165                WorkspaceDepsMode::Explicit => {
166                    content.push_str(&format!("{name} = {spec}\n"));
167                }
168            }
169        }
170    }
171    if let Some(utoipa_cfg) = &config.utoipa
172        && utoipa_cfg.enabled
173    {
174        let spec = utoipa_cfg.dependency.as_deref().unwrap_or("\"*\"");
175        match deps_mode {
176            WorkspaceDepsMode::Full | WorkspaceDepsMode::WorkspaceVersion => {
177                content.push_str("utoipa.workspace = true\n");
178            }
179            WorkspaceDepsMode::Explicit => {
180                content.push_str(&format!("utoipa = {spec}\n"));
181            }
182        }
183    }
184
185    if workspace {
186        content.push_str("\n[lints]\nworkspace = true\n");
187    }
188
189    FileInfo::project("Cargo.toml".to_string(), content)
190}
openapi_nexus/generators/rust/ureq/codegen.rs

openapi_nexus/generators/rust/ureq/
codegen.rs
