From e0eeb4fa5b1ddc2cd8d907097a77798ddc3aa3c2 Mon Sep 17 00:00:00 2001
From: Salt <rehashedsalt@cock.li>
Date: Fri, 20 Nov 2020 04:09:09 -0600
Subject: [PATCH] Add Minecraft role

---
 roles/minecraft/defaults/main.yml            | 41 ++++++++++
 roles/minecraft/handlers/main.yml            |  8 ++
 roles/minecraft/tasks/main.yml               | 82 ++++++++++++++++++++
 roles/minecraft/templates/eula.txt           |  2 +
 roles/minecraft/templates/install-modpack.sh | 15 ++++
 roles/minecraft/templates/minecraft@.service | 39 ++++++++++
 6 files changed, 187 insertions(+)
 create mode 100644 roles/minecraft/defaults/main.yml
 create mode 100644 roles/minecraft/handlers/main.yml
 create mode 100644 roles/minecraft/tasks/main.yml
 create mode 100644 roles/minecraft/templates/eula.txt
 create mode 100644 roles/minecraft/templates/install-modpack.sh
 create mode 100644 roles/minecraft/templates/minecraft@.service

diff --git a/roles/minecraft/defaults/main.yml b/roles/minecraft/defaults/main.yml
new file mode 100644
index 0000000..77c7f5b
--- /dev/null
+++ b/roles/minecraft/defaults/main.yml
@@ -0,0 +1,41 @@
+# vim:ft=ansible:
+minecraft_name: default
+minecraft_version: 1.16.3
+# minecraft_forge_version: You tell me
+
+# Packages
+# Put any extra dependencies (for mods, etc.) in _extra
+minecraft_packages:
+  - openjdk-8-jre
+  - screen
+minecraft_packages_extra: []
+
+# Addon configuration
+# You'll probably want to enable one of these
+minecraft_paper_install: no
+minecraft_paper_downloadurl: "https://papermc.io/api/v1/paper/{{ minecraft_version }}/latest/download"
+minecraft_forge_install: no
+minecraft_forge_downloadurl: "https://files.minecraftforge.net/maven/net/minecraftforge/forge/{{ minecraft_version }}-{{ minecraft_forge_version }}/forge-{{ minecraft_version }}-{{ minecraft_forge_version }}-installer.jar"
+# Define this if you already have a modpack zipped up and ready to go
+#minecraft_forge_packurl: https://path.to.your/modpack.zip
+# Define THIS if you want to download a bunch of mods by JAR URL:
+minecraft_forge_mods: []
+minecraft_vanilla_install: no
+minecraft_vanilla_downloadurl: "https://launcher.mojang.com/v1/objects/35139deedbd5182953cf1caa23835da59ca3d7cd/server.jar"
+
+# Service configuration
+minecraft_home: /opt/minecraft
+minecraft_stop_message: "Server is going down for maintenance"
+
+# Java configuration
+minecraft_jre_xms: 2048m
+minecraft_jre_xmx: 4096m
+
+# Minecraft configuration
+# Contains key-value pairs that will be lineinfile'd into server.properties
+# Example:
+# minecraft_server_properties:
+#   - { opt: allow-flight, value: "false" }
+#   - opt: gamemode
+#     value: 0
+minecraft_server_properties: {}
diff --git a/roles/minecraft/handlers/main.yml b/roles/minecraft/handlers/main.yml
new file mode 100644
index 0000000..a9003dc
--- /dev/null
+++ b/roles/minecraft/handlers/main.yml
@@ -0,0 +1,8 @@
+#!/usr/bin/ansible-playbook
+# vim:ft=ansible:
+---
+- name: "restart minecraft {{ minecraft_name }}"
+  systemd:
+    name: "minecraft@{{ minecraft_name }}"
+    state: restarted
+  become: yes
diff --git a/roles/minecraft/tasks/main.yml b/roles/minecraft/tasks/main.yml
new file mode 100644
index 0000000..4d5f10e
--- /dev/null
+++ b/roles/minecraft/tasks/main.yml
@@ -0,0 +1,82 @@
+#!/usr/bin/ansible-playbook
+# vim:ft=ansible:
+---
+- name: set up system
+  block:
+    - name: install required packages
+      apt: name="{{ minecraft_packages + minecraft_packages_extra }}"
+    - name: assure server user
+      user: name=minecraft system=yes home={{ minecraft_home }}
+    - name: assure operational directory
+      file: path={{ minecraft_home }} state=directory owner=minecraft group=minecraft mode="3775"
+    - name: assure systemd unit
+      template: src=minecraft@.service dest=/etc/systemd/system/minecraft@.service
+      notify: "restart minecraft {{ minecraft_name }}"
+- name: set up minecraft
+  block:
+    - name: assure server directory
+      file: path={{ minecraft_home }}/{{ minecraft_name }} state=directory
+    - name: accept eula
+      template: src=eula.txt dest={{ minecraft_home }}/{{ minecraft_name }}/eula.txt
+    - name: configure server properties
+      lineinfile:
+        dest: "{{ minecraft_home }}/{{ minecraft_name }}/server.properties"
+        line: "{{ item.opt }}={{ item.value }}"
+        regex: "^{{ item.opt }}=.*"
+        create: yes
+      loop: "{{ minecraft_server_properties }}"
+      notify: "restart minecraft {{ minecraft_name }}"
+  become: yes
+  become_user: minecraft
+- name: set up paper
+  block:
+    - name: download paper
+      get_url: url={{ minecraft_paper_downloadurl }} dest={{ minecraft_home }}/{{ minecraft_name }}/server.jar
+      notify: "restart minecraft {{ minecraft_name }}"
+      # TODO: Manage configs for plugins, auto-install plugins
+  become: yes
+  become_user: minecraft
+  when: minecraft_fabric_install
+- name: set up forge
+  block:
+    - name: template out modpack installer
+      template: src=install-modpack.sh dest={{ minecraft_home }}/{{ minecraft_name }}/install-modpack.sh mode="0755"
+    - name: download forge
+      get_url: dest={{ minecraft_home }}/{{ minecraft_name }}/installer.jar url={{ minecraft_forge_downloadurl }}
+      register: download_forge
+    - name: install forge
+      command:
+        chdir: "{{ minecraft_home }}/{{ minecraft_name }}"
+        argv: [ "/usr/bin/java", "-jar", "./installer.jar", "--installServer" ]
+      notify: restart minecraft {{ minecraft_name }}
+      when: download_forge is changed
+    - name: link to forge jar
+      file: path={{ minecraft_home }}/{{ minecraft_name }}/server.jar src=forge-{{ minecraft_version }}-{{ minecraft_forge_version }}.jar state=link
+    - name: install modpack
+      block:
+        - name: download modpack
+          get_url: dest={{ minecraft_home }}/{{ minecraft_name }}/modpack.zip url={{ minecraft_forge_packurl }}
+          register: download_modpack
+        - name: install modpack
+          block:
+            - name: assure modpack unzip directory
+              file: path={{ minecraft_home }}/{{ minecraft_name }}/modpack state=directory
+            - name: unpack zip
+              unarchive: src={{ minecraft_home }}/{{ minecraft_name }}/modpack.zip dest={{ minecraft_home }}/{{ minecraft_name }}/modpack remote_src=yes
+            - name: run installer
+              command:
+                chdir: "{{ minecraft_home }}/{{ minecraft_name }}"
+                argv: [ "bash", "./install-modpack.sh" ]
+              notify: "restart minecraft {{ minecraft_name }}"
+          when: download_modpack is changed
+      when: minecraft_forge_packurl is defined
+    - name: install mods
+      get_url: dest="{{ minecraft_home }}/{{ minecraft_name }}/mods" url={{ item }}
+      loop: "{{ minecraft_forge_mods }}"
+      notify: restart minecraft {{ minecraft_name }}
+      when: minecraft_forge_mods is iterable and minecraft_forge_mods != None
+  become: yes
+  become_user: minecraft
+  when: minecraft_forge_install and minecraft_forge_version is defined
+- name: enable service
+  systemd: name=minecraft@{{ minecraft_name }}.service enabled=yes state=started
diff --git a/roles/minecraft/templates/eula.txt b/roles/minecraft/templates/eula.txt
new file mode 100644
index 0000000..b0cf95f
--- /dev/null
+++ b/roles/minecraft/templates/eula.txt
@@ -0,0 +1,2 @@
+# Tacos best food yadda yadda
+eula=true
diff --git a/roles/minecraft/templates/install-modpack.sh b/roles/minecraft/templates/install-modpack.sh
new file mode 100644
index 0000000..8c56734
--- /dev/null
+++ b/roles/minecraft/templates/install-modpack.sh
@@ -0,0 +1,15 @@
+#! /bin/sh
+
+# Find out where our modpack lives
+#
+# This assumes that we have no directories adjacent to the actual pack dir
+# that contain a directory called "mods"
+#
+# If that's not the case, the onus is on you to fix your shit and/or repack
+# the server zip
+#
+directory="$(find modpack/ -type d -iname "mods" -execdir pwd \; | head -n 1)"
+echo "Syncing from $directory/"
+
+# Now we rsync everything from that directory here, which should set us up
+rsync -av "$directory"/ ./
diff --git a/roles/minecraft/templates/minecraft@.service b/roles/minecraft/templates/minecraft@.service
new file mode 100644
index 0000000..c13de59
--- /dev/null
+++ b/roles/minecraft/templates/minecraft@.service
@@ -0,0 +1,39 @@
+#
+# Licensed under the terms of the MIT license
+# Source: https://github.com/agowa338/MinecraftSystemdUnit/
+# vim:ft=dosini:
+#
+
+[Unit]
+Description=Minecraft Server %i
+After=network.target
+
+[Service]
+User=minecraft
+Group=minecraft
+WorkingDirectory={{ minecraft_home }}/%i
+PrivateUsers=true
+ProtectSystem=full
+ProtectHome=true
+# Implies MountFlags=slave
+ProtectKernelTunables=true
+# Implies NoNewPrivileges=yes
+ProtectKernelModules=true
+# Implies MountAPIVFS=yes
+ProtectControlGroups=true
+
+ExecStart=/bin/sh -c '/usr/bin/screen -DmS %i /usr/bin/java -Xms{{ minecraft_jre_xms }} -Xmx{{ minecraft_jre_xmx }} -jar server.jar nogui'
+
+ExecReload=/usr/bin/screen -p 0 -S %i -X eval 'stuff "reload"\\015'
+
+ExecStop=/usr/bin/screen -p 0 -S %i -X eval 'stuff "say Server is going down: Service was stopped"\\015'
+ExecStop=/usr/bin/screen -p 0 -S %i -X eval 'stuff "save-all"\\015'
+ExecStop=/usr/bin/screen -p 0 -S %i -X eval 'stuff "stop"\\015'
+ExecStop=/bin/sleep 5
+
+Restart=always
+# Restart after 24hrs
+RuntimeMaxSecs=86400
+
+[Install]
+WantedBy=multi-user.target