add command for generating autocompletion script

Cargo.toml

@@ -18,6 +18,7 @@ clap = { version = "4.2.4", features = ["derive", "cargo", "color"] }
 [dependencies]
 anyhow = "1.0.70"
 clap = { version = "4.2.4", features = ["derive", "cargo", "color"] }
+clap_complete = "4.4.10"
 serde = { version = "1.0.163", features = ["derive"] }
 serde_json = "1.0.96"
 regex = "1.5.4"

src/autocompletion.rs

@@ -0,0 +1,14 @@
+use anyhow::Result;
+use clap_complete::{generate_to, shells::Bash};
+use std::path::PathBuf;
+
+use crate::cli::define::build_cli_commands;
+
+pub fn generate(path: PathBuf) -> Result<()> {
+    let mut cmd = build_cli_commands();
+    let path = generate_to(Bash, &mut cmd, "git-helpe-rs", path)?;
+
+    println!("completion file has been generated into: {path:?}");
+
+    Ok(())
+}

src/bin/main.rs

@@ -1,6 +1,7 @@
 use anyhow::Result;
 
 use git_helpe_rs::{
+    autocompletion,
     branch::{checkout_to_branch_with_prefix, checkout_to_branch_with_template},
     cli,
     commit::commit_with_formatted_message,
@@ -39,6 +40,9 @@ fn main() -> Result<()> {
         cli::OperationWithArguments::SetClipboardCommands(args) => {
             config.set_clipboard_command(args)
         }
+        cli::OperationWithArguments::GenerateAutocompletionScript(path) => {
+            autocompletion::generate(path)
+        }
     };
 
     match resp {

src/cli/define.rs

@@ -151,6 +151,16 @@ pub fn build_cli_commands() -> Command {
                 ",
                 )),
         )
+        .subcommand(
+            Command::new("generate-autocompletion-script")
+                .about("Generates bash completion script")
+                .arg(
+                    Arg::new("output-directory")
+                        .required(true)
+                        .help("Directory in which git-helpe-rs.bash will be placed"),
+                ),
+        )
+        // ============= COLORS ============== //
         .color(clap::ColorChoice::Always)
         .get_styles()
 }

src/cli/map_to_operation.rs

@@ -86,6 +86,13 @@ impl TryFrom<ArgMatches> for ParsedArguments {
                     },
                 ))
             }
+            Some(("generate-autocompletion-script", args)) => {
+                let path: PathBuf = args.get_one::<String>("output-directory").unwrap().into();
+
+                Ok(OperationWithArguments::GenerateAutocompletionScript(
+                    path.to_owned(),
+                ))
+            }
             Some(("show", _args)) => Ok(OperationWithArguments::Show),
             _ => Err(anyhow::anyhow!("Unknown command")),
         };

src/cli/mod.rs

@@ -62,6 +62,7 @@ pub enum OperationWithArguments {
     SetBranchPrefix(SetFormat),
     SetClipboardCommands(SetClipboardCommands),
     Show,
+    GenerateAutocompletionScript(PathBuf),
 }
 
 pub struct ParsedArguments {

src/lib.rs

@@ -1,3 +1,4 @@
+pub mod autocompletion;
 pub mod branch;
 pub mod cli;
 pub mod commit;