feat: init commit

Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "commit-msg"
+version = "0.0.1"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+license = "MIT"
+description = "Git commit message format check"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[[bin]]
+name = "commit-msg"
+path = "src/main.rs"
+
+[dependencies]
+clap = "2.33"
+toml = "0.5"
+rust_util = "0.6"
+

src/cmd.rs

@@ -0,0 +1,13 @@
+use clap::{ArgMatches, App};
+use rust_util::XResult;
+
+pub type CommandError = XResult<()>;
+
+pub trait Command {
+
+    fn name(&self) -> &str;
+
+    fn subcommand<'a>(&self) -> App<'a, 'a>;
+
+    fn run(&self, arg_matches: &ArgMatches, _: &ArgMatches) -> CommandError;
+}

src/cmd_default.rs

@@ -0,0 +1,19 @@
+use clap::{App, Arg, ArgMatches};
+use crate::cmd::CommandError;
+
+pub struct CommandImpl;
+
+impl CommandImpl {
+
+    pub fn process_command<'a>(app: App<'a, 'a>) -> App<'a, 'a> {
+        app.arg(Arg::with_name("verbose").long("verbose").short("v").multiple(true).help("Show verbose info"))
+    }
+
+    pub fn run(arg_matches: &ArgMatches) -> CommandError {
+        let verbose_count = arg_matches.occurrences_of("verbose");
+        information!("Verbose count: {}", verbose_count);
+        information!(r#"Print using command line:
+commit-msg usage"#);
+        Ok(())
+    }
+}

src/cmd_usage.rs

@@ -0,0 +1,17 @@
+use clap::{ArgMatches, SubCommand, App};
+use crate::cmd::{Command, CommandError};
+
+pub struct CommandImpl;
+
+impl Command for CommandImpl {
+
+    fn name(&self) -> &str { "usage" }
+
+    fn subcommand<'a>(&self) -> App<'a, 'a> {
+        SubCommand::with_name(self.name()).about("Sample subcommand")
+    }
+
+    fn run(&self, _arg_matches: &ArgMatches, _sub_arg_matches: &ArgMatches) -> CommandError {
+        Ok(())
+    }
+}

src/main.rs

@@ -0,0 +1,30 @@
+#[macro_use] extern crate rust_util;
+
+mod cmd;
+mod cmd_default;
+mod cmd_usage;
+
+use clap::App;
+use cmd::{Command, CommandError};
+
+fn main() -> CommandError {
+    let commands: Vec<Box<dyn Command>> = vec![
+        Box::new(cmd_usage::CommandImpl)
+    ];
+    let mut app = App::new(env!("CARGO_PKG_NAME"))
+                    .version(env!("CARGO_PKG_VERSION"))
+                    .about(env!("CARGO_PKG_DESCRIPTION"));
+    app = cmd_default::CommandImpl::process_command(app);
+    for command in &commands {
+        app = app.subcommand(command.subcommand());
+    }
+
+    let matches = app.get_matches();
+    for command in &commands {
+        if let Some(sub_cmd_matches) = matches.subcommand_matches(command.name()) {
+            return command.run(&matches, sub_cmd_matches);
+        }
+    }
+
+    cmd_default::CommandImpl::run(&matches)
+}