feat: adding zsh installation on zsh-completions data_dir xdg (linux …

…only)

crates/aiken/Cargo.toml

@@ -43,3 +43,4 @@ clap_complete = "4.3.2"
 inquire = "0.6.2"
 num-bigint = "0.4.3"
 ordinal = "0.3.2"
+xdg = "2.5.2"

crates/aiken/src/cmd/completion/completion.rs

@@ -0,0 +1,92 @@
+
+use std::{fs::File, io::Write};
+
+use clap::{Command, Subcommand};
+use clap_complete::{generate, Shell};
+use crate::cmd::Cmd as MainCmd;
+use std::fs::OpenOptions;
+
+/// Generates shell completion scripts
+
+#[derive(clap::Args)]
+pub struct Args {
+    #[arg(short, long, default_value_t = false)]
+    install: bool,
+}
+
+fn generate_wrapper(shell: Shell, buf: &mut dyn Write) {
+        let cli = Command::new("aiken").disable_version_flag(true);
+        let mut main = MainCmd::augment_subcommands(cli);
+        generate(
+            shell,
+            &mut main,
+            "aiken".to_string(),
+            buf,
+        );
+}
+
+fn zsh() -> miette::Result<()> {
+
+
+    //if oh-my-zsh
+    //if zsh-completions in data_dir
+
+    let xdg_dirs = xdg::BaseDirectories::with_prefix("zsh-completions").unwrap();
+    let data_home = xdg_dirs.get_data_home();
+    let home = std::env::var("HOME").expect("Cannot find your home directory");
+    let mut completion_file : File;
+
+    if data_home.exists() {
+        let completion_path = xdg_dirs.place_data_file("_aiken").expect("cannot create directory");
+        completion_file = File::create(completion_path).expect("cannot open file");
+
+    } else {
+
+        let completion_path = xdg_dirs.place_data_file("_aiken").expect("cannot create directory");
+        completion_file = File::create(completion_path).expect("cannot open file");
+
+        let mut zshrc = OpenOptions::new().write(true).append(true).open(format!("{}/.zshrc",home)).expect(".zshrc file not found");
+        if let Some(home) = data_home.to_str() {
+            let fpath: String = format!(r#"fpath=($fpath "{}")"#, home);
+            if let Err(e) = writeln!(zshrc,"{}", fpath ) {
+                    eprintln!("Couldn't write to file: {}", e);
+            }
+
+        }
+    }
+
+    generate_wrapper(Shell::Zsh, &mut completion_file);
+
+    Ok(())
+}
+
+fn completions_to_file(shell: Shell) -> miette::Result<()> {
+
+    match shell {
+        Shell::Bash => {
+            todo!()
+        },
+        Shell::Fish => {
+            todo!()
+        },
+        Shell::Zsh => {
+            zsh()?;
+        },
+        _ => eprintln!("Shell not supported"),
+    }
+
+    Ok(())
+}
+
+pub fn exec(cmd_args: Args, shell: Shell) -> miette::Result<()>{
+    if cmd_args.install {
+        completions_to_file(shell)?;
+    }else {
+        generate_wrapper(
+            shell,
+            &mut std::io::stdout(),
+        );
+    }
+    Ok(())
+}
+

crates/aiken/src/cmd/completion/mod.rs

@@ -0,0 +1,22 @@
+pub mod completion;
+
+use clap::Subcommand;
+use clap_complete::Shell;
+
+/// Commands for working with transactions
+#[derive(Subcommand)]
+pub enum Cmd {
+    Bash(completion::Args),
+    Zsh(completion::Args),
+    Fish(completion::Args),
+}
+
+pub fn exec(cmd: Cmd) -> miette::Result<()> {
+    match cmd {
+        Cmd::Bash(args) => completion::exec(args,Shell::Bash),
+        Cmd::Zsh(args) => completion::exec(args,Shell::Zsh),
+        Cmd::Fish(args) => completion::exec(args,Shell::Fish),
+    }
+}
+
+