pflag -> cobra: Sub commands, completions, ...

Signed-off-by: Hadi <hadi@example.com>

nix/gomod2nix.toml

@@ -105,6 +105,10 @@ schema = 3
     version = 'v1.5.0'
     hash = 'sha256-EYVgkSEMo4HaVrsWKqnsYRp8SSS8gNf7t+Elva02Ofc='
 
+  [mod.'github.com/inconshreveable/mousetrap']
+    version = 'v1.1.0'
+    hash = 'sha256-XWlYH0c8IcxAwQTnIi6WYqq44nOKUylSWxWO/vi+8pE='
+
   [mod.'github.com/klauspost/compress']
     version = 'v1.17.8'
     hash = 'sha256-8rgCCfHX29le8m6fyVn6gwFde5TPUHjwQqZqv9JIubs='
@@ -173,6 +177,10 @@ schema = 3
     version = 'v1.10.0'
     hash = 'sha256-dQ6Qqf26IZsa6XsGKP7GDuCj+WmSsBmkBwGTDfue/rk='
 
+  [mod.'github.com/spf13/cobra']
+    version = 'v1.10.2'
+    hash = 'sha256-nbRCTFiDCC2jKK7AHi79n7urYCMP5yDZnWtNVJrDi+k='
+
   [mod.'github.com/spf13/pflag']
     version = 'v1.0.10'
     hash = 'sha256-uDPnWjHpSrzXr17KEYEA1yAbizfcsfo5AyztY2tS6ZU='

nix/package.nix

@@ -9,6 +9,14 @@
     inherit pname version ldflags;
     src = ../.;
     modules = ./gomod2nix.toml;
+    nativeBuildInputs = [ pkgs.installShellFiles ];
+    env.GOTOOLCHAIN = "local";
+    postInstall = ''
+      installShellCompletion --cmd spilltea \
+        --bash <($out/bin/spilltea completion bash) \
+        --zsh <($out/bin/spilltea completion zsh) \
+        --fish <($out/bin/spilltea completion fish)
+    '';
     meta = with pkgs.lib; {
       description = "A minimal, terminal-based HTTP(S) proxy for pentesters and CTF players.";
       homepage = "https://github.com/anotherhadi/spilltea";