1 files changed, 81 insertions, 0 deletions
diff --git a/crates/cli/src/main.rs b/crates/cli/src/main.rs
new file mode 100644
index 0000000..78d094d
--- /dev/null
+++ b/crates/cli/src/main.rs
@@ -0,0 +1,81 @@
+mod init;
+mod nuke;
+mod run;
+mod words;
+
+/// Version for this program.
+const VERSION: &str = "0.1.0";
+
+fn help() {
+    println!("Self-assessment tool for language learning.\n");
+    println!("usage: mihi [OPTIONS] [COMMAND] [COMMAND OPTIONS]\n");
+
+    println!("Options:");
+    println!("   -h, --help\t\tPrint this message.");
+    println!("   -v, --version\tPrint the version of this program.\n");
+
+    println!("Commands:");
+    println!("   init\t\t\tInitialize the configuration for this application.");
+    println!("   nuke\t\t\tRemove all files from this application and its database.");
+    println!("   run\t\t\tRun exercises. Default command if none was given.");
+    println!("   words\t\tManage the words for this application.");
+}
+
+fn main() {
+    let mut args = std::env::args();
+    let nargs = std::env::args().count();
+    let mut count = 1;
+
+    // Skip command name.
+    args.next();
+
+    // And iterate over the arguments.
+    while let Some(arg) = args.next() {
+        count += 1;
+
+        match arg.as_str() {
+            "-h" | "--help" => {
+                if nargs > count {
+                    println!(
+                        "warning: arguments passed the '{}' flag will be ignored.",
+                        arg.as_str()
+                    );
+                }
+                help();
+                std::process::exit(0);
+            }
+            "-v" | "--version" => {
+                if nargs > count {
+                    println!(
+                        "warning: arguments passed the '{}' flag will be ignored.",
+                        arg.as_str()
+                    );
+                }
+                println!("mihi {}", VERSION);
+                std::process::exit(0);
+            }
+            "init" => {
+                let rest: Vec<String> = args.collect();
+                return init::run(rest);
+            }
+            "nuke" => {
+                let rest: Vec<String> = args.collect();
+                return nuke::run(rest);
+            }
+            "words" => {
+                let rest: Vec<String> = args.collect();
+                return words::run(rest);
+            }
+            "run" => {
+                let rest: Vec<String> = args.collect();
+                return run::run(rest);
+            }
+            _ => {
+                println!("error: unknown flag or command: '{}'", arg.as_str());
+                std::process::exit(1);
+            }
+        }
+    }
+
+    run::run(Vec::new());
+}