Created mix project

.formatter.exs

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+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]

.gitignore

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+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Ignore .fetch files in case you like to edit your project deps locally.
+/.fetch
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+kafkaex_lag_exporter-*.tar
+
+# Temporary files, for example, from tests.
+/tmp/
+
+.idea/

.gitlab-ci.yml

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+# You can override the included template(s) by including variable overrides
+# SAST customization: https://docs.gitlab.com/ee/user/application_security/sast/#customizing-the-sast-settings
+# Secret Detection customization: https://docs.gitlab.com/ee/user/application_security/secret_detection/#customizing-settings
+# Dependency Scanning customization: https://docs.gitlab.com/ee/user/application_security/dependency_scanning/#customizing-the-dependency-scanning-settings
+# Container Scanning customization: https://docs.gitlab.com/ee/user/application_security/container_scanning/#customizing-the-container-scanning-settings
+# Note that environment variables can be set in several places
+# See https://docs.gitlab.com/ee/ci/variables/#cicd-variable-precedence
+stages:
+- test
+sast:
+  stage: test
+include:
+- template: Security/SAST.gitlab-ci.yml

.tool-versions

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+elixir 1.13.3

README.md

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+# KafkaexLagExporter
+
+**TODO: Add description**
+
+## Installation
+
+If [available in Hex](https://hex.pm/docs/publish), the package can be installed
+by adding `kafkaex_lag_exporter` to your list of dependencies in `mix.exs`:
+
+```elixir
+def deps do
+  [
+    {:kafkaex_lag_exporter, "~> 0.1.0"}
+  ]
+end
+```
+
+Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
+and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
+be found at <https://hexdocs.pm/kafkaex_lag_exporter>.
+

kafkaex_lag_exporter.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="ELIXIR_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <output url="file://$MODULE_DIR$/_build/dev/lib/kafkaex_lag_exporter/ebin" />
+    <output-test url="file://$MODULE_DIR$/_build/test/lib/kafkaex_lag_exporter/ebin" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/lib" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/spec" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/assets/node_modules/phoenix" />
+      <excludeFolder url="file://$MODULE_DIR$/assets/node_modules/phoenix_html" />
+      <excludeFolder url="file://$MODULE_DIR$/cover" />
+      <excludeFolder url="file://$MODULE_DIR$/deps" />
+      <excludeFolder url="file://$MODULE_DIR$/doc" />
+      <excludeFolder url="file://$MODULE_DIR$/logs" />
+    </content>
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

lib/kafkaex_lag_exporter.ex

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+defmodule KafkaexLagExporter do
+  @moduledoc """
+  Documentation for `KafkaexLagExporter`.
+  """
+
+  @doc """
+  Hello world.
+
+  ## Examples
+
+      iex> KafkaexLagExporter.hello()
+      :world
+
+  """
+  def hello do
+    :world
+  end
+end

mix.exs

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+defmodule KafkaexLagExporter.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :kafkaex_lag_exporter,
+      version: "0.1.0",
+      elixir: "~> 1.13",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      # {:dep_from_hexpm, "~> 0.3.0"},
+      # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
+    ]
+  end
+end

test/kafkaex_lag_exporter_test.exs

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+defmodule KafkaexLagExporterTest do
+  use ExUnit.Case
+  doctest KafkaexLagExporter
+
+  test "greets the world" do
+    assert KafkaexLagExporter.hello() == :world
+  end
+end

test/test_helper.exs

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+ExUnit.start()