solana-cli: install shell completions

pkgs/by-name/so/solana-cli/package.nix

@@ -7,6 +7,7 @@
 , protobuf
 , libcxx
 , rocksdb
+, installShellFiles
 , pkg-config
 , openssl
 , nix-update-script
@@ -66,7 +67,7 @@ rustPlatform.buildRustPackage rec {
   # I'm not in the mood ((ΦωΦ))
   doCheck = false;
 
-  nativeBuildInputs = [ protobuf pkg-config ];
+  nativeBuildInputs = [ installShellFiles protobuf pkg-config ];
   buildInputs = [ openssl rustPlatform.bindgenHook ]
     ++ lib.optionals stdenv.isLinux [ udev ]
     ++ lib.optionals stdenv.isDarwin [
@@ -75,9 +76,15 @@ rustPlatform.buildRustPackage rec {
     Security
     AppKit
     System
-                  Libsystem ];
+    Libsystem
+  ];
 
   postInstall = ''
+    installShellCompletion --cmd solana \
+      --bash <($out/bin/solana completion --shell bash) \
+      --fish <($out/bin/solana completion --shell fish) \
+      --zsh  <($out/bin/solana completion --shell zsh)
+
     mkdir -p $out/bin/sdk/bpf
     cp -a ./sdk/bpf/* $out/bin/sdk/bpf/
   '';
@@ -95,7 +102,7 @@ rustPlatform.buildRustPackage rec {
   OPENSSL_NO_VENDOR = 1;
 
   meta = with lib; {
-    description = "Web-Scale Blockchain for fast, secure, scalable, decentralized apps and marketplaces. ";
+    description = "Web-Scale Blockchain for fast, secure, scalable, decentralized apps and marketplaces";
     homepage = "https://solana.com";
     license = licenses.asl20;
     maintainers = with maintainers; [ netfox happysalada aikooo7 ];