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use std::{num::ParseFloatError, path::PathBuf, str::FromStr};
use fj_core::algorithms::approx::{InvalidTolerance, Tolerance};
use fj_math::Scalar;
/// Standardized CLI for Fornjot models
///
/// This is completely optional, as models are just Rust code and don't need any
/// kind of CLI interface. It is useful, however, to provide a standardized
/// interface for viewing and exporting models, and is used for Fornjot's
/// example models and the testing infrastructure they are part of.
///
/// You might not want to use this struct directly. [`Instance::process_model`]
/// provides a more high-level and convenient interface.
///
/// [`Instance::process_model`]: crate::Instance::process_model
#[derive(clap::Parser)]
pub struct Args {
/// Export model to this path
#[arg(short, long, value_name = "PATH")]
pub export: Option<PathBuf>,
/// How much the export can deviate from the original model
#[arg(short, long, value_parser = parse_tolerance)]
pub tolerance: Option<Tolerance>,
/// Ignore validation errors
#[arg(short, long)]
pub ignore_validation: bool,
}
impl Args {
/// Parse the command-line arguments
///
/// Convenience method that saves the caller from having to import the
/// `clap::Parser` trait.
pub fn parse() -> Self {
<Self as clap::Parser>::parse()
}
}
fn parse_tolerance(input: &str) -> Result<Tolerance, ArgsError> {
let tolerance = f64::from_str(input)?;
let tolerance = Scalar::from_f64(tolerance);
let tolerance = Tolerance::from_scalar(tolerance)?;
Ok(tolerance)
}
#[derive(Debug, thiserror::Error)]
pub enum ArgsError {
#[error("Error parsing tolerance")]
ParseTolerance(#[from] ParseFloatError),
#[error(transparent)]
InvalidTolerance(#[from] InvalidTolerance),
}