treewide: add meta.mainProgram (#255932)

pkgs/applications/audio/scream/default.nix

@@ -44,6 +44,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/duncanthrax/scream";
     license = licenses.mspl;
     platforms = platforms.linux;
+    mainProgram = "scream";
     maintainers = with maintainers; [ arcnmx ];
   };
 }

pkgs/development/libraries/openssl/default.nix

@@ -221,6 +221,7 @@ let
       homepage = "https://www.openssl.org/";
       description = "A cryptographic library that implements the SSL and TLS protocols";
       license = licenses.openssl;
+      mainProgram = "openssl";
       pkgConfigModules = [
         "libcrypto"
         "libssl"

pkgs/development/node-packages/main-programs.nix

@@ -26,6 +26,7 @@
   "@webassemblyjs/wasm-text-gen-1.11.1" = "wasmgen";
   "@webassemblyjs/wast-refmt-1.11.1" = "wast-refmt";
   aws-cdk = "cdk";
+  bash-language-server = "bash-language-server";
   cdk8s-cli = "cdk8s";
   cdktf-cli = "cdktf";
   clipboard-cli = "clipboard";

pkgs/tools/misc/betterdiscordctl/default.nix

@@ -36,6 +36,7 @@ stdenvNoCC.mkDerivation rec {
     homepage = "https://github.com/bb010g/betterdiscordctl";
     description = "A utility for managing BetterDiscord on Linux";
     license = licenses.mit;
+    mainProgram = "betterdiscordctl";
     maintainers = with maintainers; [ ivar bb010g ];
     platforms = platforms.linux;
   };

pkgs/tools/misc/cpulimit/default.nix

@@ -24,6 +24,7 @@ stdenv.mkDerivation rec {
     description = "CPU usage limiter";
     platforms = platforms.unix;
     license = licenses.gpl2;
+    mainProgram = "cpulimit";
     maintainers = [ maintainers.jsoo1 ];
   };
 }

pkgs/tools/wayland/kanshi/default.nix

@@ -40,6 +40,7 @@ stdenv.mkDerivation rec {
       wlr-output-management protocol.
     '';
     license = licenses.mit;
+    mainProgram = "kanshi";
     maintainers = with maintainers; [ balsoft danielbarter ];
     platforms = platforms.linux;
   };