From 6a6fcf2f4adbcd95d60a6f3214006263f4fc852b Mon Sep 17 00:00:00 2001
From: Brian Zalewski <brian@megabyte.space>
Date: Tue, 6 Dec 2022 10:26:47 +0000
Subject: [PATCH] Update
 .local/share/chezmoi/home/.chezmoiscripts/linux/run_onchange_before_10-system-tweaks,
 .local/share/chezmoi/home/.chezmoi.yaml.tmpl,
 .local/share/chezmoi/home/.chezmoiscripts/linux/run_onchange_before_configure-swap

---
 .local/share/chezmoi/home/.chezmoi.yaml.tmpl  |  1 +
 .../run_onchange_before_10-system-tweaks      | 22 ++++++++++++++++
 .../linux/run_onchange_before_configure-swap  | 26 +++++++++++++++++++
 3 files changed, 49 insertions(+)
 create mode 100644 .local/share/chezmoi/home/.chezmoiscripts/linux/run_onchange_before_10-system-tweaks
 create mode 100644 .local/share/chezmoi/home/.chezmoiscripts/linux/run_onchange_before_configure-swap

diff --git a/.local/share/chezmoi/home/.chezmoi.yaml.tmpl b/.local/share/chezmoi/home/.chezmoi.yaml.tmpl
index 79499f11..bccc431a 100644
--- a/.local/share/chezmoi/home/.chezmoi.yaml.tmpl
+++ b/.local/share/chezmoi/home/.chezmoi.yaml.tmpl
@@ -180,6 +180,7 @@ data:
       id: "{{ get .chezmoi.osRelease "id" | default .chezmoi.os }}"
     home: "{{ .chezmoi.homeDir }}"
     homeParentFolder: "{{ if eq .chezmoi.os "linux" }}/home{{ else if eq .chezmoi.os "darwin" }}/Users{{ else }}C:\Users{{ end }}"
+    hostname: "Betelgeuse"
     qubes: {{ ne (stat (joinPath "usr" "bin" "qubes-session")) false }}
     softwareGroup: "{{ $softwareGroup }}"
     type: "{{ $chassisType }}"
diff --git a/.local/share/chezmoi/home/.chezmoiscripts/linux/run_onchange_before_10-system-tweaks b/.local/share/chezmoi/home/.chezmoiscripts/linux/run_onchange_before_10-system-tweaks
new file mode 100644
index 00000000..232cb41e
--- /dev/null
+++ b/.local/share/chezmoi/home/.chezmoiscripts/linux/run_onchange_before_10-system-tweaks
@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+### Set hostname (if redefined)
+if command -v hostnamectl > /dev/null; then
+  # Betelgeuse is the default hostname so only change when it is different
+  if [ '{{ .host.hostname }}' != 'Betelgeuse' ]; then
+    logg info "Setting hostname to {{ .host.hostname }}"
+    sudo hostnamectl set-hostname {{ .host.hostname }}
+  fi
+fi
+
+### Set timezone
+if command -v timedatectl > /dev/null; then
+  logg info 'Setting timezone to `{{ .user.timezone }}`'
+  sudo timedatectl set-timezone {{ .user.timezone }}
+fi
+
+### Modify vm.max_map_count
+if command -v sysctl > /dev/null; then
+  logg info 'Increasing vm.max_map_count size to 262144'
+  sudo sysctl -w vm.max_map_count=262144
+fi
diff --git a/.local/share/chezmoi/home/.chezmoiscripts/linux/run_onchange_before_configure-swap b/.local/share/chezmoi/home/.chezmoiscripts/linux/run_onchange_before_configure-swap
new file mode 100644
index 00000000..59013cd6
--- /dev/null
+++ b/.local/share/chezmoi/home/.chezmoiscripts/linux/run_onchange_before_configure-swap
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+# TODO - make equivalent to https://gitlab.com/megabyte-labs/gas-station/-/blob/master/roles/system/common/tasks/linux/swap.yml
+
+MEMORY_IN_KB="$(grep MemTotal /proc/meminfo | sed 's/.* \(\d+\) kB/\1/')"
+MEMORY_IN_GB="$((MEMORY_IN_KB / 1024 / 1024))"
+
+if [ "$MEMORY_IN_GB" -gt 64 ]; then
+  SWAP_SPACE="$((MEMORY_IN_GB / 10))"
+elif [ "$MEMORY_IN_GB" -gt 32 ]; then
+  SWAP_SPACE="$((MEMORY_IN_GB / 8))"
+elif [ "$MEMORY_IN_GB" -gt 8 ]; then
+  SWAP_SPACE="$((MEMORY_IN_GB / 4))"
+else
+  SWAP_SPACE="$MEMORY_IN_GB"
+fi
+
+logg info "Creating a $SWAP_SPACE GB /swapfile"
+sudo fallocate -l "$SWAP_SPACE" /swapfile
+sudo chmod 600 /swapfile
+sudo mkswap /swapfile
+sudo swapon /swapfile
+if cat /etc/fstab | grep "/swapfile"; then
+  sudo sed -i '/\/swapfile/\/swapfile none swap sw 0 0/' /etc/fstab
+else
+  echo "/swapfile none swap sw 0 0" | sudo tee -a /etc/fstab
+fi