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// SPDX-FileCopyrightText: Peter Pentchev <roam@ringlet.net>
// SPDX-License-Identifier: BSD-2-Clause
//! Parse the command-line arguments for the generate-tests tool.
use std::io;
use anyhow::{Context as _, Result};
use camino::Utf8Path;
use clap::Parser as _;
use clap_derive::Parser;
use tracing::Level;
use crate::defs::Config;
/// The command-line interface arguments definition.
#[derive(Debug, Parser)]
#[clap(author, version, about)]
struct Cli {
/// The path to the shell program to generate.
#[clap(short, long)]
output_file: String,
/// Verbose operation: display diagnostic messages.
#[clap(short)]
verbose: bool,
}
/// Initialize the logging subsystem provided by the `tracing` library.
fn setup_tracing(verbose: bool) -> Result<()> {
let sub = tracing_subscriber::fmt()
.without_time()
.with_max_level(if verbose { Level::DEBUG } else { Level::INFO })
.with_writer(io::stderr)
.finish();
#[allow(clippy::absolute_paths)]
tracing::subscriber::set_global_default(sub).context("Could not initialize the tracing logger")
}
/// Parse the command-line arguments.
pub fn parse_args() -> Result<Config> {
let args = Cli::parse();
setup_tracing(args.verbose)?;
let output_file = {
let opath = Utf8Path::new(&args.output_file);
let oparent = opath.parent().with_context(|| {
format!(
"Could not determine the parent directory for the output file {output_file}",
output_file = args.output_file
)
})?;
let oparent_canon = if oparent.as_os_str().is_empty() {
Utf8Path::new(".")
.canonicalize_utf8()
.context("Could not canonicalize the current working directory")?
} else {
oparent.canonicalize_utf8().with_context(|| {
format!(
"Could not canonicalize {oparent} for the output file {output_file}",
output_file = args.output_file,
)
})?
};
oparent_canon.join(opath.file_name().with_context(|| {
format!(
"No filename portion in the output file path {output_file}",
output_file = args.output_file
)
})?)
};
Ok(Config::new(output_file))
}
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