Add fig to shells for shell completion

Cargo.lock

@@ -538,6 +538,16 @@ dependencies = [
  "clap 3.2.17",
 ]
 
+[[package]]
+name = "clap_complete_fig"
+version = "3.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed37b4c0c1214673eba6ad8ea31666626bf72be98ffb323067d973c48b4964b9"
+dependencies = [
+ "clap 3.2.17",
+ "clap_complete",
+]
+
 [[package]]
 name = "clap_derive"
 version = "3.2.17"
@@ -5253,6 +5263,7 @@ dependencies = [
  "chrono",
  "clap 3.2.17",
  "clap_complete",
+ "clap_complete_fig",
  "codec",
  "config",
  "env-bootstrap",

wezterm/Cargo.toml

@@ -14,6 +14,7 @@ anyhow = "1.0"
 chrono = "0.4"
 clap = {version="3.1", features=["derive"]}
 clap_complete = "3.1"
+clap_complete_fig = "3.2"
 codec = { path = "../codec" }
 config = { path = "../config" }
 env-bootstrap = { path = "../env-bootstrap" }

wezterm/src/main.rs

@@ -1,7 +1,7 @@
 use anyhow::{anyhow, Context};
 use chrono::{DateTime, Utc};
-use clap::{Parser, ValueHint};
-use clap_complete::{generate as generate_completion, Shell};
+use clap::{Parser, ValueEnum, ValueHint};
+use clap_complete::{generate as generate_completion, shells, Generator as CompletionGenerator};
 use config::keyassignment::SpawnTabDomain;
 use config::wezterm_version;
 use mux::activity::Activity;
@@ -56,6 +56,40 @@ struct Opt {
     cmd: Option<SubCommand>,
 }
 
+#[derive(Debug, Clone, ValueEnum)]
+enum Shell {
+    Bash,
+    Elvish,
+    Fish,
+    PowerShell,
+    Zsh,
+    Fig,
+}
+
+impl CompletionGenerator for Shell {
+    fn file_name(&self, name: &str) -> String {
+        match self {
+            Shell::Bash => shells::Bash.file_name(name),
+            Shell::Elvish => shells::Elvish.file_name(name),
+            Shell::Fish => shells::Fish.file_name(name),
+            Shell::PowerShell => shells::PowerShell.file_name(name),
+            Shell::Zsh => shells::Zsh.file_name(name),
+            Shell::Fig => clap_complete_fig::Fig.file_name(name),
+        }
+    }
+
+    fn generate(&self, cmd: &clap::Command, buf: &mut dyn std::io::Write) {
+        match self {
+            Shell::Bash => shells::Bash.generate(cmd, buf),
+            Shell::Elvish => shells::Elvish.generate(cmd, buf),
+            Shell::Fish => shells::Fish.generate(cmd, buf),
+            Shell::PowerShell => shells::PowerShell.generate(cmd, buf),
+            Shell::Zsh => shells::Zsh.generate(cmd, buf),
+            Shell::Fig => clap_complete_fig::Fig.generate(cmd, buf),
+        }
+    }
+}
+
 #[derive(Debug, Parser, Clone)]
 enum SubCommand {
     #[clap(
@@ -102,7 +136,7 @@ enum SubCommand {
     #[clap(name = "shell-completion")]
     ShellCompletion {
         /// Which shell to generate for
-        #[clap(long, possible_values=["bash", "elvish", "fish", "powershell", "zsh"])]
+        #[clap(long, value_parser)]
         shell: Shell,
     },
 }