feat: add ln, unix only and not fully compatible yet

coreutils/src/commands/ln.rs

@@ -0,0 +1,114 @@
+use boxutils::args::ArgParser;
+use boxutils::commands::Command;
+use std::env;
+use std::ops::Not;
+use std::process::exit;
+
+pub struct Ln;
+
+impl Command for Ln {
+    fn execute(&self) {
+        let mut to_be_linked = String::from("");
+        let mut destination = String::from("");
+        let family = env::consts::FAMILY;
+        let args = ArgParser::builder()
+            .add_flag("-s")
+            .add_flag("-f")
+            .add_flag("-n")
+            .add_flag("-b")
+            .add_flag("-v")
+            .add_option("-S")
+            .parse_args("ln");
+        fn help() {
+            println!("Lorem ipsum dolor sit amet.");
+            exit(1)
+        }
+        if args.get_normal_args().len() != 2 {
+            help();
+        } else {
+            to_be_linked = args.get_normal_args()[0].clone();
+            destination = args.get_normal_args()[1].clone();
+        }
+        if ((family == "unix") || (family == "windows")).not() {
+            eprintln!("OS family is unknown: {}. Aborting.", family);
+            exit(1);
+        }
+
+        #[cfg(unix)]
+        fn main(args: ArgParser, to_be_linked: String, destination: String) {
+            use std::os::unix;
+            use std::fs;
+
+            if args.get_flag("-v"){
+                println!("'{}' -> '{}'", to_be_linked, destination)
+            }
+            if args.get_flag("-f") {
+                if fs::metadata(String::from(&destination)).is_ok() {
+                    if fs::metadata(String::from(&destination)).unwrap().is_dir() {
+                        fs::remove_dir_all(String::from(&destination)).unwrap()
+                    } else {
+                        fs::remove_file(String::from(&destination)).unwrap()
+                    }
+                }
+            }
+
+            if args.get_flag("-b") {
+                let suffix = args.get_option("-S").unwrap_or("~");
+                let new_filename = format!("{}{}", destination, suffix);
+                let _ = fs::rename(&destination, new_filename);
+            }
+            if args.get_flag("-s") {
+                if args.get_flag("-n") {
+                    let _ = unix::fs::symlink(String::from(&to_be_linked), String::from(&destination)).unwrap();
+                } else {
+                    let mut metadata = fs::metadata(&to_be_linked).unwrap();
+                    let file = &to_be_linked;
+                    let mut new_file = file.clone();
+                    while metadata.is_symlink() {
+                        new_file = String::from(fs::read_link(new_file.to_string()).unwrap().into_os_string().into_string().unwrap());
+                        metadata = fs::metadata(&new_file).unwrap()
+                    }
+                    let _ = unix::fs::symlink(String::from(new_file), String::from(&destination)).unwrap();
+                }
+                exit(0)
+            } else {
+                if args.get_flag("-n") {
+                    let _ = fs::hard_link(String::from(&to_be_linked), String::from(&destination)).unwrap();
+                } else {
+                    let mut metadata = fs::metadata(&to_be_linked).unwrap();
+                    let file = &to_be_linked;
+                    let mut new_file = file.clone();
+                    while metadata.is_symlink() {
+                        new_file = String::from(fs::read_link(new_file.to_string()).unwrap().into_os_string().into_string().unwrap());
+                        metadata = fs::metadata(&new_file).unwrap()
+                    }
+                    let _ = fs::hard_link(String::from(&new_file), String::from(&destination)).unwrap();
+                }
+            }
+        }
+
+        #[cfg(windows)]
+        fn main(args: ArgParser, to_be_linked: String, destination: String) {
+            use std::os::windows;
+            use std::fs;
+            // TODO: basic code at line 77
+        }
+
+        let _ = main(args, to_be_linked, destination);
+
+//            #[cfg(windows)]
+//            fn windows(to_be_linked: String, destination: String) {
+//                use std::os::windows;
+//                use std::fs;
+//                let attr = fs::metadata(args.get_normal_args()[0].clone()).unwrap();
+//                if attr.is_dir() {
+//                    let _ = windows::fs::symlink_dir(args.get_normal_args()[0].clone(), args.get_normal_args()[1].clone());
+//                } else {
+//                    let _ = windows::fs::symlink_file(args.get_normal_args()[0].clone(), args.get_normal_args()[1].clone());
+//                }
+//            }
+//            #[cfg(windows)]
+//            windows(to_be_linked, destination);
+//        }
+    }
+}

coreutils/src/commands/mod.rs

@@ -23,4 +23,5 @@ command!(tee::Tee);
 command!(base64::Base64);
 command!(base32::Base32);
 command!(seq::Seq);
-command!(env::Env);
+command!(env::Env);
+command!(ln::Ln);

src/registry.rs

@@ -34,6 +34,7 @@ pub fn get_registry() -> CommandRegistry {
         "base32" => coreutils::commands::Base32,
         "seq" => coreutils::commands::Seq,
         "env" => coreutils::commands::Env,
+        "ln" => coreutils::commands::Ln,
         "box" => Boxcmd
     });