From f44ac239d9b06f52f0f25f990e1cf4233a6e417c Mon Sep 17 00:00:00 2001
From: Kris Lamoureux <kris@lamoureux.io>
Date: Wed, 16 Jun 2021 22:49:01 -0400
Subject: [PATCH] Minecraft modpacks.ch server management

---
 dev/host_vars/minecraft.yml                   |  9 ++-
 roles/minecraft/defaults/main.yml             |  4 +-
 roles/minecraft/tasks/java.yml                | 47 +++++++++++++
 roles/minecraft/tasks/main.yml                | 67 ++++---------------
 roles/minecraft/tasks/modpacks.yml            | 33 +++++++++
 roles/minecraft/tasks/service.yml             | 17 +++++
 roles/minecraft/tasks/system.yml              | 26 +++++++
 roles/minecraft/tasks/vanilla.yml             | 10 +++
 .../minecraft/templates/minecraft.service.j2  | 18 ++---
 9 files changed, 166 insertions(+), 65 deletions(-)
 create mode 100644 roles/minecraft/tasks/java.yml
 create mode 100644 roles/minecraft/tasks/modpacks.yml
 create mode 100644 roles/minecraft/tasks/service.yml
 create mode 100644 roles/minecraft/tasks/system.yml
 create mode 100644 roles/minecraft/tasks/vanilla.yml

diff --git a/dev/host_vars/minecraft.yml b/dev/host_vars/minecraft.yml
index f057b68..d978fa8 100644
--- a/dev/host_vars/minecraft.yml
+++ b/dev/host_vars/minecraft.yml
@@ -6,4 +6,11 @@ manage_network: false
 # Agree to EULA to start service in Vagrant
 # i.e. sed -i 's/^#minecraft_eula/minecraft_eula/' ./dev/host_vars/minecraft.yml
 #minecraft_eula: true
-minecraft_sha1: 1b557e7b033b583cd9f66746b7a9ab1ec1673ced # 1.16.5
+
+minecraft_onboot: vanilla
+minecraft:
+  - name: vanilla # 1.16.5 (https://mcversions.net/download/1.16.5)
+    sha1: 1b557e7b033b583cd9f66746b7a9ab1ec1673ced
+  - name: revelation # 3.4.0 (https://api.modpacks.ch/public/modpack/35/174)
+    modpack: 35/174
+    java: 8
diff --git a/roles/minecraft/defaults/main.yml b/roles/minecraft/defaults/main.yml
index 2d368f1..503fa43 100644
--- a/roles/minecraft/defaults/main.yml
+++ b/roles/minecraft/defaults/main.yml
@@ -1,6 +1,8 @@
 minecraft_eula: false
 minecraft_home: "/opt/minecraft"
-minecraft_url: "https://launcher.mojang.com/v1/objects/{{ minecraft_sha1 }}/server.jar"
+minecraft_java: 11
+minecraft_modpack_url: "https://api.modpacks.ch/public/modpack/{{ item.modpack }}/server/linux"
+minecraft_url: "https://launcher.mojang.com/v1/objects/{{ item.sha1 }}/server.jar"
 minecraft_user: minecraft
 minecraft_xms: 1G
 minecraft_xmx: "{{ minecraft_xms }}"
diff --git a/roles/minecraft/tasks/java.yml b/roles/minecraft/tasks/java.yml
new file mode 100644
index 0000000..7ca6e6e
--- /dev/null
+++ b/roles/minecraft/tasks/java.yml
@@ -0,0 +1,47 @@
+- name: Install GPG
+  apt:
+    name: gpg
+    state: present
+  when: item.java is defined and item.java == 8
+  loop: "{{ minecraft }}"
+
+- name: Add AdoptOpenJDK's signing key
+  apt_key:
+    id: 8ED17AF5D7E675EB3EE3BCE98AC3B29174885C03
+    url: https://adoptopenjdk.jfrog.io/adoptopenjdk/api/gpg/key/public
+  when: item.java is defined and item.java == 8
+  loop: "{{ minecraft }}"
+
+- name: Install AdoptOpenJDK repository
+  apt_repository:
+    repo: deb https://adoptopenjdk.jfrog.io/adoptopenjdk/deb/ buster main
+    mode: 0644
+    state: present
+  when: item.java is defined and item.java == 8
+  loop: "{{ minecraft }}"
+
+- name: Install Java 8
+  apt:
+    name: adoptopenjdk-8-hotspot
+    state: present
+  when: item.java is defined and item.java == 8
+  loop: "{{ minecraft }}"
+
+- name: Install Java 11
+  apt:
+    name: openjdk-11-jre
+    state: present
+  when: item.java is not defined or item.java == 11
+  loop: "{{ minecraft }}"
+
+- name: Activate Java 8
+  alternatives:
+    name: java
+    path: /usr/lib/jvm/adoptopenjdk-8-hotspot-amd64/jre/bin/java
+  when: minecraft_java == 8
+
+- name: Activate Java 11
+  alternatives:
+    name: java
+    path: /usr/lib/jvm/java-11-openjdk-amd64/bin/java
+  when: minecraft_java == 11
diff --git a/roles/minecraft/tasks/main.yml b/roles/minecraft/tasks/main.yml
index 010eadd..c13ec8d 100644
--- a/roles/minecraft/tasks/main.yml
+++ b/roles/minecraft/tasks/main.yml
@@ -1,55 +1,14 @@
-- name: Install Screen
-  apt:
-    name: screen
-    state: present
-
-- name: Install Java
-  apt:
-    name: default-jre
-    state: present
-
-- name: Create Minecraft user
-  user:
-    name: "{{ minecraft_user }}"
-    state: present
-    shell: /bin/bash
-
-- name: Create Minecraft directory
-  file:
-    path: "{{ minecraft_home }}"
-    state: directory
-    owner: "{{ minecraft_user }}"
-    group: "{{ minecraft_user }}"
-
-- name: Download Minecraft
-  get_url:
-    url: "{{ minecraft_url }}"
-    dest: "{{ minecraft_home }}/minecraft_server.jar"
-    checksum: "sha1:{{ minecraft_sha1 }}"
-    owner: "{{ minecraft_user }}"
-    group: "{{ minecraft_user }}"
-    mode: 0700
-
-- name: Deploy Minecraft systemd service
-  template:
-    src: minecraft.service.j2
-    dest: "/etc/systemd/system/minecraft.service"
-  register: minecraft_systemd
-
-- name: Answer to Mojang's EULA
-  template:
-    src: eula.txt.j2
-    dest: "{{ minecraft_home }}/eula.txt"
-    owner: "{{ minecraft_user }}"
-    group: "{{ minecraft_user }}"
-
-- name: Reload systemd manager configuration
-  systemd:
-    daemon_reload: true
-  when: minecraft_systemd.changed
-
-- name: Start Service
-  service:
-    name: minecraft
-    state: started
+- import_tasks: system.yml
+  when: minecraft_eula
+
+- import_tasks: java.yml
+  when: minecraft_eula
+
+- import_tasks: vanilla.yml
+  when: minecraft_eula
+
+- import_tasks: modpacks.yml
+  when: minecraft_eula
+
+- import_tasks: service.yml
   when: minecraft_eula
diff --git a/roles/minecraft/tasks/modpacks.yml b/roles/minecraft/tasks/modpacks.yml
new file mode 100644
index 0000000..b474c7c
--- /dev/null
+++ b/roles/minecraft/tasks/modpacks.yml
@@ -0,0 +1,33 @@
+- name: Download Minecraft modpack installer
+  get_url:
+    url: "{{ minecraft_modpack_url }}"
+    dest: "{{ minecraft_home }}/{{ item.name }}/serverinstall_{{ item.modpack | replace ('/', '_') }}"
+    owner: "{{ minecraft_user }}"
+    group: "{{ minecraft_user }}"
+    mode: 0700
+  loop: "{{ minecraft }}"
+  when: item.modpack is defined and item.sha1 is not defined
+
+- name: Run Minecraft modpack installer
+  command: "sudo -u {{ minecraft_user }} ./serverinstall_{{ item.modpack | replace ('/', '_') }} --auto"
+  args:
+    creates: "{{ minecraft_home }}/{{ item.name }}/mods"
+    chdir: "{{ minecraft_home }}/{{ item.name }}"
+  loop: "{{ minecraft }}"
+  when: item.modpack is defined and item.sha1 is not defined
+
+- name: Find Minecraft Forge
+  find:
+    paths: "{{ minecraft_home }}/{{ item.name }}"
+    patterns: "forge*.jar"
+  register: minecraft_forge
+  loop: "{{ minecraft }}"
+  when: item.modpack is defined and item.sha1 is not defined
+
+- name: Link to Minecraft Forge
+  file:
+    src: "{{ item.files[0].path }}"
+    dest: "{{ minecraft_home }}/{{ item.item.name }}/minecraft_server.jar"
+    state: link
+  loop: "{{ minecraft_forge.results }}"
+  when: minecraft_forge is defined and item.files[0].path is defined
diff --git a/roles/minecraft/tasks/service.yml b/roles/minecraft/tasks/service.yml
new file mode 100644
index 0000000..a1ae669
--- /dev/null
+++ b/roles/minecraft/tasks/service.yml
@@ -0,0 +1,17 @@
+- name: Deploy Minecraft systemd service
+  template:
+    src: minecraft.service.j2
+    dest: "/etc/systemd/system/minecraft@.service"
+  register: minecraft_systemd
+
+- name: Reload systemd manager configuration
+  systemd:
+    daemon_reload: true
+  when: minecraft_systemd.changed
+
+- name: Start Service
+  service:
+    name: "minecraft@{{ minecraft_onboot }}"
+    state: started
+    enabled: true
+  when: minecraft_eula and minecraft_onboot is defined
diff --git a/roles/minecraft/tasks/system.yml b/roles/minecraft/tasks/system.yml
new file mode 100644
index 0000000..5a8aeb1
--- /dev/null
+++ b/roles/minecraft/tasks/system.yml
@@ -0,0 +1,26 @@
+- name: Install Screen
+  apt:
+    name: screen
+    state: present
+
+- name: Create Minecraft user
+  user:
+    name: "{{ minecraft_user }}"
+    state: present
+    shell: /bin/bash
+
+- name: Create Minecraft directory
+  file:
+    path: "{{ minecraft_home }}/{{ item.name }}"
+    state: directory
+    owner: "{{ minecraft_user }}"
+    group: "{{ minecraft_user }}"
+  loop: "{{ minecraft }}"
+
+- name: Answer to Mojang's EULA
+  template:
+    src: eula.txt.j2
+    dest: "{{ minecraft_home }}/{{ item.name }}/eula.txt"
+    owner: "{{ minecraft_user }}"
+    group: "{{ minecraft_user }}"
+  loop: "{{ minecraft }}"
diff --git a/roles/minecraft/tasks/vanilla.yml b/roles/minecraft/tasks/vanilla.yml
new file mode 100644
index 0000000..2d70038
--- /dev/null
+++ b/roles/minecraft/tasks/vanilla.yml
@@ -0,0 +1,10 @@
+- name: Download Minecraft
+  get_url:
+    url: "{{ minecraft_url }}"
+    dest: "{{ minecraft_home }}/{{ item.name }}/minecraft_server.jar"
+    checksum: "sha1:{{ item.sha1 }}"
+    owner: "{{ minecraft_user }}"
+    group: "{{ minecraft_user }}"
+    mode: 0700
+  loop: "{{ minecraft }}"
+  when: item.sha1 is defined
diff --git a/roles/minecraft/templates/minecraft.service.j2 b/roles/minecraft/templates/minecraft.service.j2
index 2879b9a..a509f45 100644
--- a/roles/minecraft/templates/minecraft.service.j2
+++ b/roles/minecraft/templates/minecraft.service.j2
@@ -1,26 +1,26 @@
 [Unit]
-Description=Minecraft Server
+Description=Minecraft Server: %i
 After=network.target
 
 [Service]
 Type=simple
-WorkingDirectory={{ minecraft_home }}
+WorkingDirectory={{ minecraft_home }}/%i
 User={{ minecraft_user }}
 Group={{ minecraft_user }}
 Restart=always
 
-ExecStart=/usr/bin/screen -DmS minecraft \
+ExecStart=/usr/bin/screen -DmS minecraft-%i \
   /usr/bin/java -Xms{{ minecraft_xms }} -Xmx{{ minecraft_xmx }} -jar minecraft_server.jar nogui
-ExecReload=/usr/bin/screen -p 0 -S minecraft -X eval 'stuff "reload"\\015'
-ExecStop=/usr/bin/screen -p 0 -S minecraft -X eval 'stuff "say SERVER SHUTDOWN IN 30 SECONDS"\015'
+ExecReload=/usr/bin/screen -p 0 -S minecraft-%i -X eval 'stuff "reload"\\015'
+ExecStop=/usr/bin/screen -p 0 -S minecraft-%i -X eval 'stuff "say SERVER SHUTDOWN IN 30 SECONDS"\015'
 ExecStop=/bin/sleep 15
-ExecStop=/usr/bin/screen -p 0 -S minecraft -X eval 'stuff "say SERVER SHUTDOWN IN 15 SECONDS"\015'
+ExecStop=/usr/bin/screen -p 0 -S minecraft-%i -X eval 'stuff "say SERVER SHUTDOWN IN 15 SECONDS"\015'
 ExecStop=/bin/sleep 10
-ExecStop=/usr/bin/screen -p 0 -S minecraft -X eval 'stuff "say SERVER SHUTDOWN IN 5 SECONDS"\015'
+ExecStop=/usr/bin/screen -p 0 -S minecraft-%i -X eval 'stuff "say SERVER SHUTDOWN IN 5 SECONDS"\015'
 ExecStop=/bin/sleep 5
-ExecStop=/usr/bin/screen -p 0 -S minecraft -X eval 'stuff "save-all"\015'
+ExecStop=/usr/bin/screen -p 0 -S minecraft-%i -X eval 'stuff "save-all"\015'
 ExecStop=/bin/sleep 1
-ExecStop=/usr/bin/screen -p 0 -S minecraft -X eval 'stuff "stop"\015'
+ExecStop=/usr/bin/screen -p 0 -S minecraft-%i -X eval 'stuff "stop"\015'
 ExecStop=/bin/sleep 3
 
 [Install]