Add initial CLI model

Cargo.toml

@@ -6,3 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+clap = { features = ["derive"] }

src/main.rs

@@ -1,3 +1,60 @@
-fn main() {
-    println!("Hello, world!");
+use std::path::PathBuf;
+
+use clap::Parser;
+
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    /*
+    See https://wiki.xmltv.org/index.php/XmltvCapabilities for a full
+    description of CLI parameters needed to comply with the XMLTV standard.
+
+    Targeted capabilities:
+        - baseline
+        - manualconfig
+        - cache
+    */
+    /// Print a description that identifies this grabber
+    #[arg(long = "description")]
+    print_description: bool, // TODO
+
+    /// Print a list of this grabber's capabilities.
+    /// See https://wiki.xmltv.org/index.php/XmltvCapabilities for more
+    /// information
+    #[arg(long = "capabilities")]
+    print_capabilities: bool, // TODO
+
+    /// Bring up interactive configuration dialogue
+    #[arg(long = "configure")]
+    perform_configuration: bool, // TODO
+
+    /// Suppress all progress information
+    #[arg(short = 'q', long = "quiet")]
+    be_quiet: bool, // TODO
+
+    /// Redirect output to the specified file instead of printing to stdout
+    #[arg(short, long = "output", value_name = "FILE")]
+    output_file: Option<PathBuf>, // TODO
+
+    /// The number of days to fetch programme data for
+    #[arg(short, long)]
+    days: Option<i32>, // TODO
+
+    /// Start fetching programme data starting $DAYS days in the future
+    #[arg(short = 'O', long, value_name = "N")]
+    offset: Option<i32>, // TODO
+
+    /// Read and write all configuration to and from this file
+    #[arg(short = 'c', long = "config-file", value_name = "FILE")]
+    config_file: Option<PathBuf>, // TODO
+
+    /// Cache fetched data in the specified file
+    #[arg(short = 'C', long = "cache", value_name = "FILE")]
+    cache_file: Option<PathBuf>, // TODO
+}
+
+fn main() {
+    let args = Args::parse();
+
+    println!("Inputs: {:#?}", args);
 }