git.r.bdr.sh - rbdr/blog/blob - src/main.rs

   1 // mod argument_parser;
   2 mod configuration;
   3 mod command;
   4
   5 use std::iter::once;
   6 use std::env::args;
   7 use std::io::Result;
   8 use command::{available_commands, Command, help::Help};
   9
  10 fn main() -> Result<()> {
  11     let commands = available_commands();
  12     let arguments: Vec<String> = args().collect();
  13
  14     if let Some(command_name) = arguments.get(1) {
  15         if let Some(main_command) = commands.into_iter().find(|c| c.command() == command_name) {
  16             let before_commands = main_command.before_dependencies();
  17             let after_commands = main_command.after_dependencies();
  18
  19             let command_chain: Vec<Box<dyn Command>> = before_commands
  20                 .into_iter()
  21                 .chain(once(main_command))
  22                 .chain(after_commands.into_iter())
  23                 .collect();
  24
  25             for command in command_chain {
  26                 let result = command.execute(arguments.get(2));
  27                 if let Err(_) = result {
  28                     return result;
  29                 }
  30             }
  31
  32             return Ok(())
  33         }
  34     }
  35
  36     Help::new().execute(None)
  37 }