Migrate what bit of the yapper.py script there was to rust.

src/main.rs

@@ -0,0 +1,37 @@
+mod blog;
+mod error;
+mod og;
+
+use clap::Parser;
+use std::path::PathBuf;
+
+use crate::blog::Meta;
+
+#[derive(Debug, Parser)]
+#[clap(author, version, about)]
+struct Args {
+    /// Path to blog root.
+    #[arg(
+        short = 'i',
+        long,
+        value_hint = clap::ValueHint::DirPath,
+        default_value = format!("../test_tree/")
+    )]
+    blog_path: PathBuf,
+
+    #[arg(short, long, value_hint = clap::ValueHint::DirPath)]
+    fallback_meta: PathBuf,
+
+    #[arg(short, long, value_hint = clap::ValueHint::DirPath)]
+    single_meta: PathBuf,
+}
+
+fn main() {
+    let config = Args::parse();
+
+    blog::FALLBACK_META_PATH.get_or_init(|| config.fallback_meta);
+
+    let _meta = Meta::try_from(config.single_meta).expect("Failed to deserialize single_meta file");
+
+    println!("Loaded FallbackMeta");
+}