move clap into utils

Signed-off-by: Jason Volk <jason@zemos.net>

src/utils/clap.rs

@@ -0,0 +1,33 @@
+//! Integration with `clap`
+
+use std::path::PathBuf;
+
+use clap::Parser;
+
+/// Returns the current version of the crate with extra info if supplied
+///
+/// Set the environment variable `CONDUIT_VERSION_EXTRA` to any UTF-8 string to
+/// include it in parenthesis after the SemVer version. A common value are git
+/// commit hashes.
+#[allow(clippy::doc_markdown)]
+fn version() -> String {
+	let cargo_pkg_version = env!("CARGO_PKG_VERSION");
+
+	match option_env!("CONDUIT_VERSION_EXTRA") {
+		Some(x) => format!("{} ({})", cargo_pkg_version, x),
+		None => cargo_pkg_version.to_owned(),
+	}
+}
+
+/// Commandline arguments
+#[derive(Parser, Debug)]
+#[clap(version = version(), about, long_about = None)]
+pub(crate) struct Args {
+	#[arg(short, long)]
+	/// Optional argument to the path of a conduwuit config TOML file
+	pub(crate) config: Option<PathBuf>,
+}
+
+/// Parse commandline arguments into structured data
+#[must_use]
+pub(crate) fn parse() -> Args { Args::parse() }

src/utils/mod.rs

@@ -1,3 +1,4 @@
+pub(crate) mod clap;
 pub(crate) mod debug;
 pub(crate) mod error;