support to generate Nushell completion script by --generate-completion-script

Author: rhysd

Cargo.lock

@@ -70,6 +70,7 @@ ansi_colours = { version = "1.2.2", default-features = false, optional = true }
 dirs-next = { version = "2.0.0", optional = true } # Using dirs-next because bat uses it
 mimalloc = { version = "0.1.37", default-features = false }
 clap_mangen = "0.2.12"
+clap_complete_nushell = "4.3.1"
 
 [target."cfg(windows)".dependencies]
 nu-ansi-term = { version = "0.48.0", default-features = false }

Cargo.toml

@@ -19,7 +19,7 @@ use hgrep::bat::BatPrinter;
 #[cfg(feature = "syntect-printer")]
 use hgrep::syntect::SyntectPrinter;
 
-const COMPLETION_SHELLS: [&str; 5] = ["bash", "zsh", "powershell", "fish", "elvish"];
+const COMPLETION_SHELLS: [&str; 6] = ["bash", "zsh", "powershell", "fish", "elvish", "nushell"];
 
 fn command() -> Command {
     #[cfg(feature = "syntect-printer")]
@@ -381,6 +381,7 @@ fn command() -> Command {
 fn generate_completion_script<W: io::Write>(shell: &str, out: &mut W) {
     use clap_complete::generate;
     use clap_complete::shells::*;
+    use clap_complete_nushell::Nushell;
 
     let mut cmd = command();
     if shell.eq_ignore_ascii_case("bash") {
@@ -393,6 +394,8 @@ fn generate_completion_script<W: io::Write>(shell: &str, out: &mut W) {
         generate(Fish, &mut cmd, "hgrep", out)
     } else if shell.eq_ignore_ascii_case("elvish") {
         generate(Elvish, &mut cmd, "hgrep", out)
+    } else if shell.eq_ignore_ascii_case("nushell") {
+        generate(Nushell, &mut cmd, "hgrep", out)
     } else {
         unreachable!() // SHELL argument was validated by clap
     }