some MizePart stuff and other stuff

parts/cli/src/lib.rs

@@ -0,0 +1,72 @@
+use clap::{ArgMatches, Command};
+use std::any::Any;
+use std::collections::HashMap;
+
+use mize::{Mize, MizePart, MizeResult, instance::MizePartGuard};
+
+struct CliPart {
+    mize: Mize,
+    cmd: Option<Command>,
+    actions: HashMap<String, fn(&ArgMatches) -> MizeResult<()>>,
+}
+
+pub fn new(mize: Mize) -> CliPart {
+    CliPart {
+        mize,
+        cmd: None,
+        actions: HashMap::new(),
+    }
+}
+
+impl MizePart for CliPart {
+    fn name(&self) -> &'static str {
+        "cli"
+    }
+    fn get_mize(&mut self) -> &mut Mize {
+        &mut self.mize
+    }
+    fn init(&mut self, _mize: &mut Mize) -> MizeResult<()> {
+        Ok(())
+    }
+    fn opts(&self, mize: &mut Mize) {
+        mize.new_opt("cli.name");
+    }
+    fn run(&mut self, _mize: &mut Mize) -> MizeResult<()> {
+        let matches = self.cmd.take().unwrap().get_matches();
+        let sub_cmd = matches.subcommand_name().unwrap();
+        let action = self.actions.get(sub_cmd).unwrap();
+        action(matches.subcommand_matches(sub_cmd).unwrap());
+        Ok(())
+    }
+    fn as_any(&self) -> &dyn std::any::Any {
+        self
+    }
+    fn as_any_mut(&self) -> &dyn std::any::Any {
+        self
+    }
+    fn into_any(self: Box<CliPart>) -> Box<dyn Any> {
+        self
+    }
+}
+
+impl CliPart {
+    pub fn subcommand(
+        &mut self,
+        cmd: Command,
+        action: fn(sub_matches: &ArgMatches) -> MizeResult<()>,
+    ) -> &mut Command {
+        let cmd = self.cmd.take().unwrap().subcommand(cmd);
+        self.actions.insert(cmd.get_name().to_string(), action);
+        self.cmd = Some(cmd);
+        self.cmd.as_mut().unwrap()
+    }
+    pub fn get(mize: &mut Mize) -> MizePartGuard<CliPart> {
+        let mut dyn_guard = mize.get_part("cli").unwrap();
+        let part = dyn_guard.part.take().unwrap();
+        let cli_part = part.into_any().downcast::<CliPart>().unwrap();
+        MizePartGuard {
+            mize: dyn_guard.mize.clone(),
+            part: Some(*cli_part),
+        }
+    }
+}