stellar_xdr/cli/generate/
default.rs

1use clap::{Args, ValueEnum};
2use std::{
3    io::{stdout, Write},
4    str::FromStr,
5};
6
7use crate::cli::util;
8
9#[derive(thiserror::Error, Debug)]
10pub enum Error {
11    #[error("unknown type {0}, choose one of {1:?}")]
12    UnknownType(String, &'static [&'static str]),
13    #[error("error reading file: {0}")]
14    ReadFile(#[from] std::io::Error),
15    #[error("error generating XDR: {0}")]
16    WriteXdr(#[from] crate::Error),
17    #[error("error generating JSON: {0}")]
18    GenerateJson(#[from] serde_json::Error),
19    #[error("type doesn't have a text representation, use 'json' as output")]
20    TextUnsupported,
21}
22
23/// Generate default XDR values
24#[derive(Args, Debug, Clone)]
25#[command()]
26pub struct Cmd {
27    /// XDR type to generate
28    #[arg(long)]
29    pub r#type: String,
30
31    // Output format to encode to
32    #[arg(long = "output", value_enum, default_value_t)]
33    pub output_format: OutputFormat,
34}
35
36#[derive(Default, Clone, Copy, Debug, Eq, Hash, PartialEq, ValueEnum)]
37pub enum OutputFormat {
38    Single,
39    #[default]
40    SingleBase64,
41    // TODO: Stream,
42    // TODO: StreamBase64,
43    // TODO: StreamFramed,
44    Json,
45    JsonFormatted,
46    Text,
47}
48
49// TODO: Remove run_x macro, it exists only to reduce the diff from when curr/next
50// channels existed and each had their own run_curr/run_next invocation.
51macro_rules! run_x {
52    ($f:ident) => {
53        fn $f(&self) -> Result<(), Error> {
54            use crate::WriteXdr;
55            let r#type = crate::TypeVariant::from_str(&self.r#type).map_err(|_| {
56                Error::UnknownType(self.r#type.clone(), &crate::TypeVariant::VARIANTS_STR)
57            })?;
58            let v = crate::Type::default(r#type);
59            match self.output_format {
60                OutputFormat::Single => {
61                    let l = crate::Limits::none();
62                    stdout().write_all(&v.to_xdr(l)?)?
63                }
64                OutputFormat::SingleBase64 => {
65                    let l = crate::Limits::none();
66                    println!("{}", v.to_xdr_base64(l)?)
67                }
68                OutputFormat::Json => {
69                    println!("{}", serde_json::to_string(&v)?);
70                }
71                OutputFormat::JsonFormatted => {
72                    println!("{}", serde_json::to_string_pretty(&v)?);
73                }
74                OutputFormat::Text => {
75                    let v = serde_json::to_value(v)?;
76                    let text = util::serde_json_value_to_text(v).ok_or(Error::TextUnsupported)?;
77                    println!("{text}")
78                }
79            }
80            Ok(())
81        }
82    };
83}
84
85impl Cmd {
86    /// Run the CLIs generate zero command.
87    ///
88    /// ## Errors
89    ///
90    /// If the command is configured with state that is invalid.
91    pub fn run(&self) -> Result<(), Error> {
92        self.run_inner()
93    }
94
95    run_x!(run_inner);
96}
stellar_xdr/cli/generate/default.rs

stellar_xdr/cli/generate/
default.rs
