osobhandClaude Opus 5.5
386bd1d41e
-c meant "list at most N differences" in h5rs, but in h5diff -c is --compare (a flag) and the count is -n/--count=N, so a script moved over from h5diff behaved differently: `h5diff -r -c 2 A B` exits 2 (the 2 is taken as a file name) while h5rs exited 1. The count is now -n/--count, -c/--compare is accepted (h5rs always lists objects that are not comparable), and the --count=N, --delta=D, --relative=R forms are accepted; exit codes equal h5diff's on 7 cases. Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
53 lines
1.4 KiB
Rust
53 lines
1.4 KiB
Rust
//! Argument handling and output plumbing shared by the subcommands.
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use std::io::Write;
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/// Where a subcommand writes: `o` for results, `e` for diagnostics.
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pub struct Out<'a> {
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pub o: &'a mut dyn Write,
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pub e: &'a mut dyn Write,
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}
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/// The arguments after the subcommand name.
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pub struct Args {
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cmd: &'static str,
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rest: std::collections::VecDeque<String>,
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}
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impl Args {
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pub fn new(cmd: &'static str, rest: Vec<String>) -> Self {
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Self {
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cmd,
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rest: rest.into(),
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}
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}
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#[allow(clippy::should_implement_trait)]
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pub fn next(&mut self) -> Option<String> {
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self.rest.pop_front()
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}
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/// Put an option and its value back, to be read next (for the
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/// `--name=value` form).
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pub fn push_front(&mut self, name: String, value: String) {
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self.rest.push_front(value);
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self.rest.push_front(name);
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}
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/// The value after an option such as `--max-bytes`.
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pub fn value(&mut self) -> Option<String> {
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self.rest.pop_front()
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}
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/// A numeric option value.
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pub fn number<T: std::str::FromStr>(&mut self) -> Option<T> {
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self.rest.pop_front().and_then(|s| s.parse().ok())
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}
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/// Report a usage problem; exit status 2.
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pub fn usage_error(&self, out: &mut Out, msg: &str, usage: &str) -> std::io::Result<i32> {
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writeln!(out.e, "h5rs {}: {msg}\n\n{usage}", self.cmd)?;
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Ok(2)
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}
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}
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