taler-rust

GNU Taler code in Rust. Largely core banking integrations.
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cyclos-codegen.rs (2618B)

      1 /*
      2   This file is part of TALER
      3   Copyright (C) 2025 Taler Systems SA
      4 
      5   TALER is free software; you can redistribute it and/or modify it under the
      6   terms of the GNU Affero General Public License as published by the Free Software
      7   Foundation; either version 3, or (at your option) any later version.
      8 
      9   TALER is distributed in the hope that it will be useful, but WITHOUT ANY
     10   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
     11   A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more details.
     12 
     13   You should have received a copy of the GNU Affero General Public License along with
     14   TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
     15 */
     16 
     17 use std::io::Write;
     18 use std::io::stdout;
     19 
     20 use clap::Parser;
     21 use taler_build::long_version;
     22 
     23 /// Cyclos API schema codegen
     24 #[derive(clap::Parser, Debug)]
     25 #[command(long_version = long_version(), about, long_about = None)]
     26 struct Args {
     27     kind: Kind,
     28     ty: String,
     29 }
     30 
     31 #[derive(Debug, Clone, Copy, clap::ValueEnum)]
     32 enum Kind {
     33     Error,
     34     Enum,
     35 }
     36 
     37 #[tokio::main]
     38 async fn main() -> anyhow::Result<()> {
     39     let args = Args::parse();
     40     let api: serde_json::Value = reqwest::get("https://demo.cyclos.org/api/openapi.json")
     41         .await?
     42         .json()
     43         .await?;
     44     let schemas = &api["components"]["schemas"];
     45 
     46     let out = &mut stdout().lock();
     47     let ty = &schemas[&args.ty];
     48     let lines: Vec<_> = ty["description"].as_str().unwrap().lines().collect();
     49 
     50     match args.kind {
     51         Kind::Error => writeln!(
     52             out,
     53             "#[derive(Debug, serde::Deserialize, thiserror::Error)]"
     54         )?,
     55         Kind::Enum => writeln!(out, "#[derive(Debug, serde::Deserialize)]")?,
     56     }
     57     writeln!(out, "#[serde(rename_all = \"camelCase\")]")?;
     58     writeln!(out, "/// {}", lines[0])?;
     59     writeln!(out, "pub enum {} {{", args.ty)?;
     60     for (i, l) in lines[2..].iter().enumerate() {
     61         let name = ty["enum"][i].as_str().unwrap();
     62         let mut split = l.split("`").skip(1);
     63         let code = split.next().unwrap();
     64         let msg = split
     65             .next()
     66             .unwrap()
     67             .strip_prefix(": ")
     68             .unwrap()
     69             .trim_end_matches('.');
     70         assert_eq!(name, code);
     71         match args.kind {
     72             Kind::Error => writeln!(out, "    #[error(\"{name} - {msg}\")]")?,
     73             Kind::Enum => writeln!(out, "    /// {msg}")?,
     74         }
     75         writeln!(
     76             out,
     77             "    {}{},",
     78             name.chars().next().unwrap().to_uppercase(),
     79             &name[1..]
     80         )?;
     81     }
     82     writeln!(out, "}}")?;
     83     Ok(())
     84 }