gradle_6: drop (#352490)

  This change requires granting access to the repositories to this user or

  setting the appropriate one through `services.cgit.some-instance.user`.

- `gradle_6` was removed due to being [unsupported upstream as of 10 Feb 2023](https://endoflife.date/gradle).

  Additionally, it had numerous security vulnerabilities that were only patched

  in later versions, such as [CVE-2021-29429](https://nvd.nist.gov/vuln/detail/CVE-2021-32751),

  [CVE-2021-29427](https://nvd.nist.gov/vuln/detail/CVE-2021-29427), [CVE-2021-29428](https://nvd.nist.gov/vuln/detail/CVE-2021-29428), and [CVE-2021-32751](https://nvd.nist.gov/vuln/detail/CVE-2021-32751).

- `nvimpager` was updated to version 0.13.0, which changes the order of user and

  nvimpager settings: user commands in `-c` and `--cmd` now override the

  respective default settings because they are executed later.

    defaultJava = jdk17;

  };

  gradle_6 = gen {

    version = "6.9.4";

    hash = "sha256-PiQCKFON6fGHcqV06ZoLqVnoPW7zUQFDgazZYxeBOJo=";

    defaultJava = jdk11;

    meta.knownVulnerabilities = [

      "CVE-2021-29429: '[...]files created with open permissions in the system temporary directory can allow an attacker to access information downloaded by Gradle[...]'"

      "CVE-2021-29427: '[...]there is a vulnerability which can lead to information disclosure and/or dependency poisoning[...] In some cases, Gradle may ignore content filters and search all repositories for dependencies. This only occurs when repository content filtering is used from within a `pluginManagement` block in a settings file.'"

      "CVE-2021-29428: '[...]the system temporary directory can be created with open permissions that allow multiple users to create and delete files within it. Gradle builds could be vulnerable to a local privilege escalation from an attacker quickly deleting and recreating files in the system temporary directory.'"

      "CVE-2021-32751: '[...]start scripts generated by the `application` plugin and the `gradlew` script are both vulnerable to arbitrary code execution when an attacker is able to change environment variables for the user running the script[...]'"

    ];

  };

  wrapGradle = {

      lib, callPackage, mitm-cache, substituteAll, symlinkJoin, concatTextFile, makeSetupHook, nix-update-script

    }:

  gnuradio3_9Minimal = throw "gnuradio3_9Minimal has been removed because it is not compatible with the latest volk and it had no dependent packages which justified it's distribution"; # Added 2024-07-28

  gnuradio3_9Packages = throw "gnuradio3_9Minimal has been removed because it is not compatible with the latest volk and it had no dependent packages which justified it's distribution"; # Added 2024-07-28

  gobby5 = throw "'gobby5' has been renamed to/replaced by 'gobby'"; # Converted to throw 2024-10-17

  gradle_6 = throw "Gradle 6 has been removed, as it is end-of-life (https://endoflife.date/gradle) and has many vulnerabilities that are not resolved until Gradle 7."; # Added 2024-10-30

  gradle_6-unwrapped = throw "Gradle 6 has been removed, as it is end-of-life (https://endoflife.date/gradle) and has many vulnerabilities that are not resolved until Gradle 7."; # Added 2024-10-30

  #godot

  gradleGen = gradle-packages.gen;

  wrapGradle = callPackage gradle-packages.wrapGradle { };

  gradle_6-unwrapped = callPackage gradle-packages.gradle_6 { };

  gradle_7-unwrapped = callPackage gradle-packages.gradle_7 { };

  gradle_8-unwrapped = callPackage gradle-packages.gradle_8 { };

  gradle-unwrapped = gradle_8-unwrapped;

  gradle_6 = wrapGradle gradle_6-unwrapped null;

  gradle_7 = wrapGradle gradle_7-unwrapped null;

  gradle_8 = wrapGradle gradle_8-unwrapped null;

  gradle = wrapGradle gradle-unwrapped "gradle-unwrapped";