fix(role): Install tmux-resurrect on Arch Linux from AUR

We previously attempted to delete a file even if none was present.
This is now fixed.

defaults/main.yml

@@ -44,6 +44,7 @@ packages_linux_paru_archlinux:
   - 'flent'
   - 'mmv'
   - 'paccache-hook'
+  - 'tmux-resurrect'
 
 packages_linux_common_debian:
   - 'apt-file'
@@ -56,3 +57,46 @@ packages_linux_common_debian:
   - 'netcat-openbsd'
   - 'unattended-upgrades'
   - 'xxd'
+
+package_config:
+  - name: 'tmux'
+    global_config_file: '/etc/tmux.conf'
+    marker: 'sane defaults'
+    global_config: |
+      # Renumber windows when one is deleted
+      set-option -g renumber-windows on
+
+      # Enable mouse control (clickable windows, panes, resizable panes)
+      set -g mouse on
+  - name: 'git'
+    global_config_file: '/etc/gitconfig'
+    marker: 'sane defaults'
+    global_config: |
+      [alias]
+          # https://stackoverflow.com/a/30998048
+          # Find merge that contains a given commit
+          find-merge = "!sh -c 'commit=$0 && branch=${1:-HEAD} && (git rev-list $commit..$branch --ancestry-path | cat -n; git rev-list $commit..$branch --first-parent | cat -n) | sort -k2 -s | uniq -f1 -d | sort -n | tail -1 | cut -f2'"
+
+          # https://stackoverflow.com/a/30998048
+          # Show merge commit msg and other details of merge commit
+          # that contains a given commit  
+          show-merge = "!sh -c 'merge=$(git find-merge $0 $1) && [ -n \"$merge\" ] && git show $merge'"
+
+          # https://stackoverflow.com/a/23508223
+          # Show all commits that are part of a merge commit
+          log-merge = "!f() { git log --stat \"$1^..$1\"; }; f"
+
+tmux_global_config_file: '/etc/tmux.conf'
+tmux_global_config_resurrect: |
+  # Auto-load tmux-resurrect
+  # prefix + Ctrl-s - save
+  # prefix + Ctrl-r - restore
+  run-shell /usr/share/tmux-resurrect/resurrect.tmux
+  
+  # Restore pane content (not just running commands)
+  # This will e.g. show the last 'ls' output you did in a pane
+  set -g @resurrect-capture-pane-contents 'on'
+  
+  # Restore a few additional processes beyond the conservative default of
+  # vi vim nvim emacs man less more tail top htop irssi weechat mutt
+  set -g @resurrect-processes 'btop journalctl ncdu watch'

tasks/base-package-auxiliary-settings-single-package-single-config.yml

@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: MIT
+
+# This file adds config blocks to files that are dependent on a single package
+# being present. If for example the 'git' package is present we want content in
+# Git's global '/etc/gitconfig' file. If the package is absent that file content
+# is removed. If after that the file is empty (i.e. has a size of 0 bytes) the
+# file is deleted.
+
+- name: 'Add per-package config'
+  when: 'pkg.name in ansible_facts.packages'
+  loop_control:
+    loop_var: 'pkg'
+    label: 'If ''{{ pkg.name }}'' package is present set system-wide config in ''{{ pkg.global_config_file }}'''
+  loop: '{{ package_config }}'
+  ansible.builtin.blockinfile:
+    marker: '# {mark} ANSIBLE MANAGED BLOCK - {{ pkg.name }} {{ pkg.marker }}'
+    path: '{{ pkg.global_config_file }}'
+    append_newline: true
+    prepend_newline: true
+    state: 'present'
+    create: true
+    block: '{{ pkg.global_config }}'
+
+- name: 'Get stats of global config files'
+  register: 'role_common_packages__global_config_file_stats'
+  loop_control:
+    loop_var: 'pkg'
+    label: 'Get stats of ''{{ pkg.name }}'' system-wide config file ''{{ pkg.global_config_file }}'''
+  loop: '{{ package_config }}'
+  ansible.builtin.stat:
+    path: '{{ pkg.global_config_file }}'
+
+- name: 'Remove per-package config'
+  when: 'stat_result.pkg.name not in ansible_facts.packages and stat_result.stat.exists'
+  loop_control:
+    loop_var: 'stat_result'
+    label: 'If ''{{ stat_result.pkg.name }}'' package is absent and system-wide config file ''{{ stat_result.pkg.global_config_file }}'' is present remove config file'
+  loop: '{{ role_common_packages__global_config_file_stats.results }}'
+  ansible.builtin.file:
+    path: '{{ stat_result.pkg.global_config_file }}'
+    state: 'absent'

tasks/base-package-auxiliary-settings-tmux.yml

@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: MIT
+- name: 'If Arch Linux and if ''tmux-resurrect'' and ''tmux'' packages are present auto-load tmux-resurrect on tmux start system-wide'
+  when: '(ansible_facts[''os_family''] | lower == ''archlinux'') and (''tmux-resurrect'' in ansible_facts.packages) and (''tmux'' in ansible_facts.packages)'
+  ansible.builtin.blockinfile:
+    marker: '# {mark} ANSIBLE MANAGED BLOCK - tmux-resurrect'
+    path: '{{ tmux_global_config_file }}'
+    append_newline: true
+    prepend_newline: true
+    state: 'present'
+    create: true
+    block: '{{ tmux_global_config_resurrect }}'
+
+- name: 'Get stats of ''{{ tmux_global_config_file }}'''
+  ansible.builtin.stat:
+    path: '{{ tmux_global_config_file }}'
+  register: 'role_common_packages__tmux_global_config_file_stats'
+
+- name: 'If Arch Linux and ''tmux-resurrect'' package is absent and system-wide config file ''{{ tmux_global_config_file }}'' is present remove config block from file'
+  when: '(ansible_facts[''os_family''] | lower == ''archlinux'') and (''tmux-resurrect'' not in ansible_facts.packages) and (role_common_packages__tmux_global_config_file_stats.stat.exists)'
+  ansible.builtin.blockinfile:
+    marker: '# {mark} ANSIBLE MANAGED BLOCK - tmux-resurrect'
+    path: '{{ tmux_global_config_file }}'
+    state: 'absent'
+    block: '{{ tmux_global_config_resurrect }}'
+
+- name: 'If ''{{ tmux_global_config_file }}'' is 0 bytes delete it'
+  when: 'role_common_packages__tmux_global_config_file_stats.stat.size == 0'
+  ansible.builtin.file:
+    path: '{{ tmux_global_config_file }}'
+    state: 'absent'
+

tasks/base-package-auxiliary-settings.yml

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: MIT
+- import_tasks: 'base-package-auxiliary-settings-tmux.yml'
+- import_tasks: 'base-package-auxiliary-settings-single-package-single-config.yml'

tasks/base-packages.yml

@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: MIT
+- name: 'Gather package facts'
+  ansible.builtin.package_facts:
+    manager: 'auto'
+
+- name: 'If OS is a Linux flavor install Linux-specific packages'
+  when: 'ansible_facts[''system''] | lower == ''linux'''
+  ansible.builtin.package:
+    name: '{{ packages_linux_common_all_families }}'
+    state: 'present'
+
+- name: 'If ''os_family'' is ''{{ ansible_facts[''os_family''] | lower }}'' install {{ ansible_facts[''os_family''] | lower }}-specific packages'
+  ansible.builtin.package:
+    name: '{{ vars[''packages_linux_common_'' + ansible_facts[''os_family''] | lower] }}'
+    state: 'present'
+
+- name: 'If Arch Linux install Arch User Repository (AUR) packages'
+  when: 'ansible_facts[''os_family''] | lower == ''archlinux'''
+  kewlfft.aur.aur:
+    name: '{{ packages_linux_paru_archlinux }}'
+    state: 'present'
+  become: 'yes'
+  become_user: 'build'

tasks/main.yml

@@ -1,25 +1,7 @@
 # SPDX-License-Identifier: MIT
-- name: 'If OS is a Linux flavor install Linux-specific packages'
-  when: 'ansible_facts[''system''] | lower == ''linux'''
-  ansible.builtin.package:
-    name: '{{ packages_linux_common_all_families }}'
-    state: 'present'
-
-- name: 'If ''os_family'' is ''{{ ansible_facts[''os_family''] | lower }}'' install {{ ansible_facts[''os_family''] | lower }}-specific packages'
-  ansible.builtin.package:
-    name: '{{ vars[''packages_linux_common_'' + ansible_facts[''os_family''] | lower] }}'
-    state: 'present'
-
-- name: 'If Arch Linux install Arch User Repository (AUR) packages'
-  when: 'ansible_facts[''os_family''] | lower == ''archlinux'''
-  kewlfft.aur.aur:
-    name: '{{ packages_linux_paru_archlinux }}'
-    state: 'present'
-  become: 'yes'
-  become_user: 'build'
-
+- import_tasks: 'base-packages.yml'
+- import_tasks: 'base-package-auxiliary-settings.yml'
 - import_tasks: 'arch-linux-local-aur-repo-chroot.yml'
   when: 'ansible_facts[''os_family''] | lower == ''archlinux'''
-
 - import_tasks: 'maintenance-unattended-upgrades.yml'
   when: 'ansible_facts[''os_family''] | lower == ''debian'''