1 files changed, 111 insertions, 0 deletions
diff --git a/examples/pacman.rs b/examples/pacman.rs
new file mode 100644
index 0000000..aee7cd8
--- /dev/null
+++ b/examples/pacman.rs
@@ -0,0 +1,111 @@
+use clap::{Arg, ArgAction, Command};
+
+fn main() {
+    let matches = Command::new("pacman")
+        .about("package manager utility")
+        .version("5.2.1")
+        .subcommand_required(true)
+        .arg_required_else_help(true)
+        .author("Pacman Development Team")
+        // Query subcommand
+        //
+        // Only a few of its arguments are implemented below.
+        .subcommand(
+            Command::new("query")
+                .short_flag('Q')
+                .long_flag("query")
+                .about("Query the package database.")
+                .arg(
+                    Arg::new("search")
+                        .short('s')
+                        .long("search")
+                        .help("search locally installed packages for matching strings")
+                        .conflicts_with("info")
+                        .takes_value(true)
+                        .multiple_values(true),
+                )
+                .arg(
+                    Arg::new("info")
+                        .long("info")
+                        .short('i')
+                        .conflicts_with("search")
+                        .help("view package information")
+                        .takes_value(true)
+                        .multiple_values(true),
+                ),
+        )
+        // Sync subcommand
+        //
+        // Only a few of its arguments are implemented below.
+        .subcommand(
+            Command::new("sync")
+                .short_flag('S')
+                .long_flag("sync")
+                .about("Synchronize packages.")
+                .arg(
+                    Arg::new("search")
+                        .short('s')
+                        .long("search")
+                        .conflicts_with("info")
+                        .takes_value(true)
+                        .multiple_values(true)
+                        .help("search remote repositories for matching strings"),
+                )
+                .arg(
+                    Arg::new("info")
+                        .long("info")
+                        .conflicts_with("search")
+                        .short('i')
+                        .action(ArgAction::SetTrue)
+                        .help("view package information"),
+                )
+                .arg(
+                    Arg::new("package")
+                        .help("packages")
+                        .required_unless_present("search")
+                        .takes_value(true)
+                        .multiple_values(true),
+                ),
+        )
+        .get_matches();
+
+    match matches.subcommand() {
+        Some(("sync", sync_matches)) => {
+            if sync_matches.contains_id("search") {
+                let packages: Vec<_> = sync_matches
+                    .get_many::<String>("search")
+                    .expect("contains_id")
+                    .map(|s| s.as_str())
+                    .collect();
+                let values = packages.join(", ");
+                println!("Searching for {}...", values);
+                return;
+            }
+
+            let packages: Vec<_> = sync_matches
+                .get_many::<String>("package")
+                .expect("is present")
+                .map(|s| s.as_str())
+                .collect();
+            let values = packages.join(", ");
+
+            if sync_matches.get_flag("info") {
+                println!("Retrieving info for {}...", values);
+            } else {
+                println!("Installing {}...", values);
+            }
+        }
+        Some(("query", query_matches)) => {
+            if let Some(packages) = query_matches.get_many::<String>("info") {
+                let comma_sep = packages.map(|s| s.as_str()).collect::<Vec<_>>().join(", ");
+                println!("Retrieving info for {}...", comma_sep);
+            } else if let Some(queries) = query_matches.get_many::<String>("search") {
+                let comma_sep = queries.map(|s| s.as_str()).collect::<Vec<_>>().join(", ");
+                println!("Searching Locally for {}...", comma_sep);
+            } else {
+                println!("Displaying all locally installed packages...");
+            }
+        }
+        _ => unreachable!(), // If all subcommands are defined above, anything else is unreachable
+    }
+}