docear: drop

Upstream itself says it is not actively developed:
https://docear.org/2017/10/05/update-for-the-google-scholar-parser-library-to-fetch-metadata-for-pdf-files/

The sole Nixpkgs maintainer has not used Docear in
4 years:
https://github.com/NixOS/nixpkgs/pull/353043#discussion_r1826528473

nixos/doc/manual/release-notes/rl-2411.section.md

@@ -391,6 +391,9 @@
 
 - `services.pgbouncer` systemd service is configured with `Type=notify-reload` and allows reloading configuration without process restart. PgBouncer configuration options were moved to the free-form type option named [`services.pgbouncer.settings`](#opt-services.pgbouncer.settings) according to the NixOS RFC 0042.
 
+- Docear was removed because it was unmaintained upstream.
+  JabRef, Zotero, or Mendeley are potential replacements.
+
 - `nodePackages.coc-metals` was removed due to being deprecated upstream.
   `vimPlugins.nvim-metals` is its official replacement.
 

pkgs/applications/office/docear/default.nix

@@ -1,45 +0,0 @@
-{lib, stdenv, fetchurl, runtimeShell, makeWrapper
-, oraclejre
-, antialiasFont ? true
-}:
-
-stdenv.mkDerivation {
-  pname = "docear";
-  version = "1.2";
-
-  src = fetchurl {
-    url = "http://docear.org/downloads/docear_linux.tar.gz";
-    sha256 = "1g5n7r2x4gas6dl2fbyh7v9yxdcb6bzml8n3ldmpzv1rncgjcdp4";
-  };
-
-  nativeBuildInputs = [ makeWrapper ];
-  buildInputs = [ oraclejre ];
-
-  buildPhase = "";
-  installPhase = ''
-    mkdir -p $out/bin
-    mkdir -p $out/share
-    cp -R * $out/share
-    chmod 0755 $out/share/ -R
-
-    # The wrapper ensures oraclejre is used
-    makeWrapper ${runtimeShell} $out/bin/docear \
-      --set _JAVA_OPTIONS "${lib.optionalString antialiasFont "-Dswing.aatext=TRUE -Dawt.useSystemAAFontSettings=on"}" \
-      --set JAVA_HOME ${oraclejre.home} \
-      --add-flags "$out/share/docear.sh"
-
-    chmod 0755 $out/bin/docear
-    '';
-
-  meta = with lib; {
-    description = "Unique solution to academic literature management";
-    homepage = "http://www.docear.org/";
-    # Licenses at: http://www.docear.org/software/download/
-    license = with licenses; [
-      gpl2 # for the main software and some dependencies
-      bsd3 # for one of its dependencies
-    ];
-    maintainers = with maintainers; [ unode ];
-    platforms = platforms.all;
-  };
-}

pkgs/top-level/aliases.nix

@@ -273,6 +273,7 @@ mapAliases {
   dillong = throw "'dillong' has been removed, as upstream is abandoned since 2021-12-13. Use either 'dillo' or 'dillo-plus'. The latter integrates features from dillong."; # Added 2024-10-07
   dnnl = throw "'dnnl' has been renamed to/replaced by 'oneDNN'"; # Converted to throw 2024-10-17
   dnscrypt-wrapper = throw "dnscrypt-wrapper was removed because it has been effectively unmaintained since 2018. Use DNSCcrypt support in dnsdist instead"; # Added 2024-09-14
+  docear = throw "Docear was removed because it was unmaintained upstream. JabRef, Zotero, or Mendeley are potential replacements."; # Added 2024-11-02
   docker-compose_1 = throw "'docker-compose_1' has been removed because it has been unmaintained since May 2021. Use docker-compose instead."; # Added 2024-07-29
   docker-distribution = distribution; # Added 2023-12-26
   dolphin-emu-beta = dolphin-emu; # Added 2023-02-11

pkgs/top-level/all-packages.nix

@@ -6938,8 +6938,6 @@ with pkgs;
 
   docbook2mdoc = callPackage ../tools/misc/docbook2mdoc { };
 
-  docear = callPackage ../applications/office/docear { };
-
   dockbarx = callPackage ../applications/misc/dockbarx { };
 
   dog = callPackage ../tools/system/dog { };