Add completion subcommand (#1968)

* Add completion subcommand

* Remove old completion scripts

* Move completion logic

Cargo.toml

@@ -13,8 +13,6 @@ keywords = ["static", "site", "generator", "blog"]
 include = ["src/**/*", "LICENSE", "README.md"]
 
 [build-dependencies]
-clap = "3"
-clap_complete = "3"
 winres = "0.1"
 time = "0.3"
 
@@ -23,6 +21,7 @@ name = "zola"
 
 [dependencies]
 clap = { version = "3", features = ["derive"] }
+clap_complete = "3"
 # Below is for the serve cmd
 hyper = { version = "0.14.1", default-features = false, features = ["runtime", "server", "http2", "http1"] }
 tokio = { version = "1.0.1", default-features = false, features = ["rt", "fs", "time"] }

build.rs

@@ -1,7 +1,3 @@
-// use clap::Shell;
-
-include!("src/cli.rs");
-
 fn generate_pe_header() {
     use time::OffsetDateTime;
 
@@ -18,12 +14,6 @@ fn generate_pe_header() {
 }
 
 fn main() {
-    // disabled below as it fails in CI
-    //    let mut app = build_cli();
-    //    app.gen_completions("zola", Shell::Bash, "completions/");
-    //    app.gen_completions("zola", Shell::Fish, "completions/");
-    //    app.gen_completions("zola", Shell::Zsh, "completions/");
-    //    app.gen_completions("zola", Shell::PowerShell, "completions/");
     if std::env::var("CARGO_CFG_TARGET_OS").unwrap() != "windows"
         && std::env::var("PROFILE").unwrap() != "release"
     {