lib.getExe: Do not make assumptions about the main program

lib/meta.nix

@@ -144,5 +144,9 @@ rec {
        => "/nix/store/am9ml4f4ywvivxnkiaqwr0hyxka1xjsf-mustache-go-1.3.0/bin/mustache"
   */
   getExe = x:
-    "${lib.getBin x}/bin/${x.meta.mainProgram or (lib.getName x)}";
+    "${lib.getBin x}/bin/${x.meta.mainProgram or (
+      # This could be turned into an error when 23.05 is at end of life
+      lib.warn "getExe: Package ${lib.strings.escapeNixIdentifier x.meta.name or x.pname or x.name} does not have the meta.mainProgram attribute. We'll assume that the main program has the same name for now, but this behavior is deprecated, because it leads to surprising errors when the assumption does not hold. If the package has a main program, please set `meta.mainProgram` in its definition to make this warning go away. Otherwise, if the package does not have a main program, or if you don't control its definition, specify the full path to the program, such as \"\${lib.getBin foo}/bin/bar\"."
+      lib.getName x
+    )}";
 }

nixos/modules/programs/oddjobd.nix

@@ -10,6 +10,11 @@ in
   };
 
   config = lib.mkIf cfg.enable {
+    assertions = [
+      { assertion = false;
+        message = "The oddjob service was found to be broken without NixOS test or maintainer. Please take ownership of this service.";
+      }
+    ];
     systemd.packages = [ cfg.package ];
 
     systemd.services.oddjobd = {
@@ -21,7 +26,7 @@ in
       serviceConfig = {
         Type = "dbus";
         BusName = "org.freedesktop.oddjob";
-        ExecStart = "${lib.getExe cfg.package}/bin/oddjobd";
+        ExecStart = "${lib.getBin cfg.package}/bin/oddjobd";
       };
     };
   };

pkgs/applications/audio/espeak-ng/default.nix

@@ -75,5 +75,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ aske ];
     platforms = platforms.all;
+    mainProgram = "espeak-ng";
   };
 }

pkgs/applications/display-managers/greetd/regreet.nix

@@ -31,5 +31,6 @@ rustPlatform.buildRustPackage rec {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ fufexan ];
     platforms = platforms.linux;
+    mainProgram = "regreet";
   };
 }

pkgs/applications/emulators/darling/default.nix

@@ -227,5 +227,6 @@ in stdenv.mkDerivation {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ zhaofengli ];
     platforms = [ "x86_64-linux" ];
+    mainProgram = "darling";
   };
 }

pkgs/applications/graphics/openscad/default.nix

@@ -109,5 +109,6 @@ mkDerivation rec {
     license = lib.licenses.gpl2;
     platforms = lib.platforms.unix;
     maintainers = with lib.maintainers; [ bjornfor raskin gebner ];
+    mainProgram = "openscad";
   };
 }

pkgs/applications/graphics/tesseract/tesseract5.nix

@@ -41,5 +41,6 @@ stdenv.mkDerivation rec {
     license = lib.licenses.asl20;
     maintainers = with lib.maintainers; [ anselmschueler ];
     platforms = lib.platforms.unix;
+    mainProgram = "tesseract";
   };
 }

pkgs/applications/networking/browsers/firefox/packages.nix

@@ -20,6 +20,7 @@
                                              # not in `badPlatforms` because cross-compilation on 64-bit machine might work.
       maxSilent = 14400; # 4h, double the default of 7200s (c.f. #129212, #129115)
       license = lib.licenses.mpl20;
+      mainProgram = "firefox";
     };
     tests = [ nixosTests.firefox ];
     updateScript = callPackage ./update.nix {
@@ -46,6 +47,7 @@
                                              # not in `badPlatforms` because cross-compilation on 64-bit machine might work.
       maxSilent = 14400; # 4h, double the default of 7200s (c.f. #129212, #129115)
       license = lib.licenses.mpl20;
+      mainProgram = "firefox";
     };
     tests = [ nixosTests.firefox-beta ];
     updateScript = callPackage ./update.nix {
@@ -74,6 +76,7 @@
                                              # not in `badPlatforms` because cross-compilation on 64-bit machine might work.
       maxSilent = 14400; # 4h, double the default of 7200s (c.f. #129212, #129115)
       license = lib.licenses.mpl20;
+      mainProgram = "firefox";
     };
     tests = [ nixosTests.firefox-devedition ];
     updateScript = callPackage ./update.nix {
@@ -104,6 +107,7 @@
       broken = stdenv.buildPlatform.is32bit; # since Firefox 60, build on 32-bit platforms fails with "out of memory".
                                              # not in `badPlatforms` because cross-compilation on 64-bit machine might work.
       license = lib.licenses.mpl20;
+      mainProgram = "firefox";
     };
     tests = [ nixosTests.firefox-esr-102 ];
     updateScript = callPackage ./update.nix {
@@ -132,6 +136,7 @@
       broken = stdenv.buildPlatform.is32bit; # since Firefox 60, build on 32-bit platforms fails with "out of memory".
                                              # not in `badPlatforms` because cross-compilation on 64-bit machine might work.
       license = lib.licenses.mpl20;
+      mainProgram = "firefox";
     };
     tests = [ nixosTests.firefox-esr-115 ];
     updateScript = callPackage ./update.nix {

pkgs/applications/networking/clash-verge/default.nix

@@ -60,5 +60,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl3Plus;
     sourceProvenance = with sourceTypes; [ binaryNativeCode ];
     maintainers = with maintainers; [ zendo ];
+    mainProgram = "clash-verge";
   };
 }

pkgs/applications/networking/instant-messengers/discord/linux.nix

@@ -18,6 +18,7 @@ let
     {
       pythonInterpreter = "${python3.interpreter}";
       configDirName = lib.toLower binaryName;
+      meta.mainProgram = "disable-breaking-updates.py";
     } ''
     mkdir -p $out/bin
     cp ${./disable-breaking-updates.py} $out/bin/disable-breaking-updates.py

pkgs/applications/networking/irc/thelounge/default.nix

@@ -88,5 +88,6 @@ stdenv.mkDerivation (finalAttrs: {
     maintainers = with maintainers; [ winter raitobezarius ];
     license = licenses.mit;
     inherit (nodejs.meta) platforms;
+    mainProgram = "thelounge";
   };
 })

pkgs/applications/version-management/gitea/default.nix

@@ -88,5 +88,6 @@ buildGoModule rec {
     license = licenses.mit;
     maintainers = with maintainers; [ disassembler kolaente ma27 techknowlogick ];
     broken = stdenv.isDarwin;
+    mainProgram = "gitea";
   };
 }

pkgs/applications/virtualization/kvmtool/default.nix

@@ -29,5 +29,6 @@ stdenv.mkDerivation {
     license = licenses.gpl2Only;
     maintainers = with maintainers; [ astro ];
     platforms = [ "x86_64-linux" "aarch64-linux" ];
+    mainProgram = "nvramtool";
   };
 }

pkgs/applications/window-managers/cage/default.nix

@@ -44,5 +44,6 @@ stdenv.mkDerivation rec {
     license     = licenses.mit;
     platforms   = platforms.linux;
     maintainers = with maintainers; [ primeos ];
+    mainProgram = "cage";
   };
 }

pkgs/build-support/writers/scripts.nix

@@ -25,13 +25,21 @@ rec {
       name = last (builtins.split "/" nameOrPath);
     in
 
-    pkgs.runCommandLocal name (if (types.str.check content) then {
-      inherit content interpreter;
-      passAsFile = [ "content" ];
-    } else {
-      inherit interpreter;
-      contentPath = content;
-    }) ''
+    pkgs.runCommandLocal name (
+      lib.optionalAttrs (nameOrPath == "/bin/${name}") {
+        meta.mainProgram = name;
+      }
+      // (
+        if (types.str.check content) then {
+          inherit content interpreter;
+          passAsFile = [ "content" ];
+        } else {
+          inherit interpreter;
+          contentPath = content;
+        }
+      )
+    )
+    ''
       # On darwin a script cannot be used as an interpreter in a shebang but
       # there doesn't seem to be a limit to the size of shebang and multiple
       # arguments to the interpreter are allowed.
@@ -89,6 +97,8 @@ rec {
       # https://github.com/NixOS/nixpkgs/issues/154203
       # https://github.com/NixOS/nixpkgs/issues/148189
       nativeBuildInputs = [ stdenv.cc.bintools ];
+    } // lib.optionalAttrs (nameOrPath == "/bin/${name}") {
+      meta.mainProgram = name;
     }) ''
       ${compileScript}
       ${lib.optionalString strip

pkgs/desktops/gnome/apps/file-roller/default.nix

@@ -73,5 +73,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2Plus;
     platforms = platforms.linux;
     maintainers = teams.gnome.members ++ teams.pantheon.members;
+    mainProgram = "file-roller";
   };
 }

pkgs/development/interpreters/perl/intepreter.nix

@@ -232,6 +232,7 @@ stdenv.mkDerivation (rec {
     maintainers = [ maintainers.eelco ];
     platforms = platforms.all;
     priority = 6; # in `buildEnv' (including the one inside `perl.withPackages') the library files will have priority over files in `perl`
+    mainProgram = "perl";
   };
 } // lib.optionalAttrs (stdenv.buildPlatform != stdenv.hostPlatform) rec {
   crossVersion = "c876045741f5159318085d2737b0090f35a842ca"; # June 5, 2022

pkgs/development/interpreters/python/cpython/default.nix

@@ -572,5 +572,6 @@ in with passthru; stdenv.mkDerivation {
     license = licenses.psfl;
     platforms = platforms.linux ++ platforms.darwin;
     maintainers = with maintainers; [ fridh ];
+    mainProgram = "python3";
   };
 }

pkgs/development/libraries/xdg-dbus-proxy/default.nix

@@ -46,5 +46,6 @@ stdenv.mkDerivation rec {
     license = licenses.lgpl21Plus;
     maintainers = with maintainers; [ jtojnar ];
     platforms = platforms.linux;
+    mainProgram = "xdg-dbus-proxy";
   };
 }

pkgs/development/python-modules/flake8/default.nix

@@ -45,5 +45,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/pycqa/flake8";
     license = licenses.mit;
     maintainers = with maintainers; [ dotlambda ];
+    mainProgram = "flake8";
   };
 }

pkgs/development/tools/continuous-integration/woodpecker/agent.nix

@@ -13,5 +13,6 @@ buildGoModule {
 
   meta = common.meta // {
     description = "Woodpecker Continuous Integration agent";
+    mainProgram = "woodpecker-agent";
   };
 }

pkgs/development/tools/continuous-integration/woodpecker/server.nix

@@ -23,5 +23,6 @@ buildGoModule {
 
   meta = common.meta // {
     description = "Woodpecker Continuous Integration server";
+    mainProgram = "woodpecker-server";
   };
 }

pkgs/development/tools/esbuild/default.nix

@@ -23,5 +23,6 @@ buildGoModule rec {
     changelog = "https://github.com/evanw/esbuild/blob/v${version}/CHANGELOG.md";
     license = licenses.mit;
     maintainers = with maintainers; [ lucus16 marsam undefined-moe ];
+    mainProgram = "esbuild";
   };
 }

pkgs/development/tools/esbuild/netlify.nix

@@ -29,5 +29,6 @@ buildGoModule rec {
     homepage = "https://github.com/netlify/esbuild";
     license = licenses.mit;
     maintainers = with maintainers; [ roberth ];
+    mainProgram = "esbuild";
   };
 }

pkgs/development/tools/geckodriver/default.nix

@@ -26,5 +26,6 @@ rustPlatform.buildRustPackage rec {
     homepage = "https://github.com/mozilla/geckodriver";
     license = licenses.mpl20;
     maintainers = with maintainers; [ jraygauthier ];
+    mainProgram = "geckodriver";
   };
 }

pkgs/development/tools/misc/libtool/default.nix

@@ -34,5 +34,7 @@ stdenv.mkDerivation rec {
 
     license = lib.licenses.gpl2Plus;
     platforms = lib.platforms.unix;
+
+    mainProgram = "libtool";
   };
 }

pkgs/development/tools/misc/libtool/libtool2.nix

@@ -68,5 +68,6 @@ stdenv.mkDerivation rec {
     license = licenses.gpl2Plus;
     maintainers = [ ];
     platforms = platforms.unix;
+    mainProgram = "libtool";
   };
 }

pkgs/development/tools/misc/tokei/default.nix

@@ -28,5 +28,6 @@ rustPlatform.buildRustPackage rec {
     homepage = "https://github.com/XAMPPRocky/tokei";
     license = with licenses; [ asl20 /* or */ mit ];
     maintainers = with maintainers; [ gebner lilyball ];
+    mainProgram = "tokei";
   };
 }

pkgs/development/tools/selenium/chromedriver/default.nix

@@ -73,5 +73,6 @@ in stdenv.mkDerivation rec {
     # Note from primeos: By updating Chromium I also update Google Chrome and
     # ChromeDriver.
     platforms = attrNames allSpecs;
+    mainProgram = "chromedriver";
   };
 }

pkgs/os-specific/linux/below/default.nix

@@ -43,5 +43,6 @@ rustPlatform.buildRustPackage rec {
     description = "A time traveling resource monitor for modern Linux systems";
     license = licenses.asl20;
     homepage = "https://github.com/facebookincubator/below";
+    mainProgram = "below";
   };
 }

pkgs/servers/code-server/default.nix

@@ -322,5 +322,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ offline henkery code-asher ];
     platforms = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" ];
+    mainProgram = "code-server";
   };
 })

pkgs/servers/consul/default.nix

@@ -42,5 +42,6 @@ buildGoModule rec {
     platforms = platforms.linux ++ platforms.darwin;
     license = licenses.mpl20;
     maintainers = with maintainers; [ pradeepchhetri vdemeester nh2 techknowlogick];
+    mainProgram = "consul";
   };
 }

pkgs/servers/dns/acme-dns/default.nix

@@ -30,5 +30,6 @@ buildGoModule rec {
     changelog = "https://github.com/joohoi/acme-dns/releases/tag/${src.rev}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ emilylange ];
+    mainProgram = "acme-dns";
   };
 }

pkgs/servers/ldap/lldap/default.nix

@@ -110,5 +110,6 @@ in rustPlatform.buildRustPackage (commonDerivationAttrs // {
     license = licenses.gpl3Only;
     platforms = platforms.linux;
     maintainers = with maintainers; [ emilylange bendlas ];
+    mainProgram = "lldap";
   };
 })

pkgs/servers/monitoring/grafana-agent/default.nix

@@ -73,5 +73,6 @@ buildGoModule rec {
     homepage = "https://grafana.com/products/cloud";
     changelog = "https://github.com/grafana/agent/blob/${src.rev}/CHANGELOG.md";
     maintainers = with lib.maintainers; [ flokli emilylange ];
+    mainProgram = "grafana-agent";
   };
 }

pkgs/servers/openvscode-server/default.nix

@@ -219,5 +219,6 @@ stdenv.mkDerivation (finalAttrs: {
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ dguenther ghuntley emilytrau ];
     platforms = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+    mainProgram = "openvscode-server";
   };
 })

pkgs/servers/pufferpanel/default.nix

@@ -98,5 +98,6 @@ buildGoModule rec {
     homepage = "https://www.pufferpanel.com/";
     license = with licenses; [ asl20 ];
     maintainers = with maintainers; [ ckie tie ];
+    mainProgram = "pufferpanel";
   };
 }

pkgs/servers/web-apps/kavita/default.nix

@@ -73,5 +73,6 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     license = lib.licenses.gpl3Only;
     platforms = lib.platforms.linux;
     maintainers = with lib.maintainers; [ misterio77 ];
+    mainProgram = "kavita";
   };
 })

pkgs/servers/x11/xorg/overrides.nix

@@ -161,6 +161,9 @@ self: super:
     + lib.optionalString stdenv.hostPlatform.isStatic ''
       export NIX_CFLAGS_LINK="$NIX_CFLAGS_LINK -lXau -lXdmcp"
     '';
+    meta = attrs.meta // {
+      mainProgram = "xdpyinfo";
+    };
   });
 
   xdm = super.xdm.overrideAttrs (attrs: {
@@ -814,6 +817,7 @@ self: super:
         --replace '_X_NORETURN' '__attribute__((noreturn))' \
         --replace 'n_dirs--;' ""
     '';
+    meta.mainProgram = "lndir";
   });
 
   twm = super.twm.overrideAttrs (attrs: {
@@ -940,6 +944,12 @@ self: super:
     '';
   });
 
+  xset = super.xset.overrideAttrs (attrs: {
+    meta = attrs.meta // {
+      mainProgram = "xset";
+    };
+  });
+
   # convert Type1 vector fonts to OpenType fonts
   fontbitstreamtype1 = super.fontbitstreamtype1.overrideAttrs (attrs: {
     nativeBuildInputs = attrs.nativeBuildInputs ++ [ fontforge ];

pkgs/tools/backup/tarsnap/default.nix

@@ -40,5 +40,6 @@ stdenv.mkDerivation rec {
     license     = lib.licenses.unfree;
     platforms   = lib.platforms.unix;
     maintainers = with lib.maintainers; [ thoughtpolice roconnor ];
+    mainProgram = "tarsnap";
   };
 }

pkgs/tools/misc/coreboot-utils/default.nix

@@ -65,6 +65,7 @@ let
     nvramtool = generic {
       pname = "nvramtool";
       meta.description = "Read and write coreboot parameters and display information from the coreboot table in CMOS/NVRAM";
+      meta.mainProgram = "nvramtool";
     };
     superiotool = generic {
       pname = "superiotool";