Automatic network modules in polybar

When initializing the system (or later launching `~/.config/bootstrap/init_netctl <env>` and `~/.init_config.sh <env>`, each interface is converted in a module and then referenced in the bottom_center variable of the bottom bar.

.config/bootstrap/config_common

@@ -15,6 +15,8 @@ catppuccin-gtk-theme-macchiato
 chafa
 chromium
 cups
+dhcpcd
+dialog
 docker
 dosfstools
 dkms
@@ -33,6 +35,7 @@ hplip
 htop
 i3-wm
 i3lock-color
+ifplugd
 imagemagick
 jq
 kwayland5
@@ -49,10 +52,8 @@ mlocate
 nmap
 nemo
 neofetch
+netctl
 neovim
-network-manager-applet
-networkmanager
-nm-connection-editor
 noto-fonts-emoji
 numlockx
 obsidian
@@ -99,6 +100,7 @@ vim
 vlc
 vscodium-bin
 wget
+wpa_supplicant
 xautolock
 xclip
 xdg-user-dirs

.config/bootstrap/init_netctl.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+# ${1} : environment (see README.md)
+module_names=''
+echo -e "* Auto-create wired profil, autoconnect service for netctl and polybar module..."
+for i in `ip -br l | awk '$1 !~ "lo|vir|br|wl" { print $1}'`; do
+    echo -e "~ ${i}..."
+	module_name="network-${i}"
+	module_names+=" ${module_name}" 
+    cat <<- EOF | sudo tee /etc/netctl/${i} >/dev/null
+		Interface=${i}
+		Connection=ethernet
+		IP=dhcp
+	EOF
+	cat <<- EOF | tee ~/.config/polybar/config.d/${i}.${1} >/dev/null
+		[module/${module_name}]
+		type = internal/network
+		interface = ${i}
+		ping-interval = 3
+		label-connected = \${env:BAR_WIRED_CONNECTED}
+		label-disconnected = 
+		label-disconnected-foreground = \${colors.text}
+		; Consider an 'UNKNOWN' interface state as up.
+		; Some devices like USB network adapters have 
+		; an unknown state, even when they're running
+		; Default: false
+		unknown-as-up = true
+	EOF
+	sudo systemctl enable --now netctl-ifplugd@${i}
+	# In case some old config stays....
+	sudo systemctl restart netctl-ifplugd@${i}
+
+done
+echo -e "* Autoconnect to wireless profiles..."
+for i in `ip -br l | awk '$1 ~ "wl" { print $1}'`; do
+	module_name="network-${i}"
+	module_names+=" ${module_name}" 
+	echo -e "~ ${i}..."
+	cat <<- EOF | tee ~/.config/polybar/config.d/${i}.${1} >/dev/null
+		[module/${module_name}]
+		type = internal/network
+		interface = ${i}
+		ping-interval = 3
+		label-connected = \${env:BAR_WIFI_CONNECTED}
+		label-disconnected = 
+		label-disconnected-foreground = \${colors.text}
+	EOF
+	sudo systemctl enable --now netctl-auto@${i}
+done
+echo -e "* Create an override polybar file to add all discovered networks..."
+cat << EOF | tee ~/.config/polybar/config.d/bottom_center.${1} >/dev/null
+[variables]
+bottom_center = updates-arch-combined ${module_names}
+EOF
+# https://man.archlinux.org/man/netctl.special.7
+echo -e "* Ensure connections are back when PC is resumed..."
+sudo systemctl enable netctl-sleep

.config/polybar/config.d/misc.desk

@@ -6,7 +6,6 @@ top_center = player-mpris
 ;top_center = xwindow
 top_right = system-usb-udev date
 bottom_left = i3
-bottom_center = updates-arch-combined wired-network 
 bottom_right = temperature cpu memory filesystem-custom
 
 [module/memory]

.config/polybar/config.d/misc.laptop

@@ -6,7 +6,6 @@ top_center = player-mpris
 ;top_center = xwindow
 top_right = system-usb-udev backlight pulseaudio date
 bottom_left = i3
-bottom_center = updates-arch-combined wireless-network
 bottom_right = temperature cpu memory filesystem-custom
 
 [module/memory]

.config/polybar/config_common

@@ -76,26 +76,6 @@ type = internal/xwindow
 label = ${env:BAR_WINDOW}
 label-maxlen=100
 
-[module/wireless-network]
-type = internal/network
-interface-type = wireless
-interval = 1
-label-connected = ${env:BAR_WIFI_CONNECTED}
-label-disconnected = Wireless disconnected
-label-disconnected-foreground = ${colors.text}
-; Poorly documented and hackish way to have more space between some modules
-label-connected-margin = 10
-label-disconnected-margin = 10
-
-[module/wired-network]
-type = internal/network
-interface = enp8s0
-interface-type = wired
-interval = 1
-label-connected = ${env:BAR_WIRED_CONNECTED}
-label-disconnected = Ethernet disconnected
-label-disconnected-foreground = ${colors.text}
-
 [module/i3]
 type = internal/i3
 format = <label-state> <label-mode>

.config/polybar/scripts/updates-arch-combined.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
-
+# Wait for connection
 source $(dirname $0)/../.env
-connect=$(ping -q -w 1 -c 1 `ip r | grep default | cut -d ' ' -f 3` &> /dev/null)
+connect=$(ping -q -w 1 -c 1 8.8.8.8 &> /dev/null)
 if [ $? -eq 0 ]; then
     updates_arch=$(/usr/bin/checkupdates | wc -l)
     # a restricts to AUR packages

.init_config.sh

@@ -50,27 +50,24 @@ function check_copy() {
 # with an optional `$1/config.d/$2` file. This is useful for having
 # a common base for multiple computer, and per-computer stuff.
 # $1 : path of the folder 
-# $2 : optional current environment
+# $2 : current environment
 # $3 : if defined, prepend $2 instead of appending
 function merge_config() {
 	echo -e "\n=== Generate ${m} config file ==="
-	rm -f ${CONFIG}/${m}/${FINAL_CONFIG}
+	final_path=${CONFIG}/${m}/${FINAL_CONFIG}.${2}
+	rm -f ${final_path}
 	# Copy common config
-	cp ${CONFIG}/${m}/${BASE_CONFIG} ${CONFIG}/${m}/${FINAL_CONFIG}
-	echo "${CONFIG}/${m}/${FINAL_CONFIG} created"
+	cp ${CONFIG}/${m}/${BASE_CONFIG} ${final_path}
+	echo "${final_path} created"
 	# If there is an override folder, merge given env
 	if [ ! -z ${2} ] && [ -d ${CONFIG}/${m}/${MERGE_CONFIG_FOLDER} ]; then
 		for f in `find ${CONFIG}/${m}/config.d -type f -path "*${2}"`; do
-			final_path=${CONFIG}/${m}/${FINAL_CONFIG}
 			if [ -z $3 ]; then 
 				echo "Found ${f}, append to regular config file"
-				cat "${f}" >> ${final_path}
+				echo -e "\n$(cat ${f})\n" >> ${final_path}
 			else
 				echo "Found ${f}, prepend to regular config file"
-				cat ${f} > /tmp/config
-				echo -e '\n' >> /tmp/config
-				cat ${final_path} >> /tmp/config
-				mv /tmp/config ${final_path}
+				echo -e "\n$(cat ${f})\n$(cat ${final_path})\n" > ${final_path}
 			fi
 		done
 	fi
@@ -94,15 +91,13 @@ function init_system() {
 	# https://man.archlinux.org/man/rofi-dmenu.5
 	echo -e "* Symlink dmenu → rofi..."
 	sudo ln -sf /usr/bin/rofi /usr/bin/dmenu
-	echo -e "* Enabling required systemd units..."
-	sudo systemctl enable --now NetworkManager
+	echo -e "* Enabling common systemd units..."
 	sudo systemctl enable --now systemd-timesyncd
 	sudo systemctl enable --now cups
 	sudo systemctl enable --now bluetooth
 	sudo systemctl enable --now bluetooth-autoconnect
 	sudo systemctl enable --now updatedb.timer
-	# iwd will be used as a backend for NetworkManager
-	sudo systemctl disable wpa_supplicant
+	~/.config/init_netctl.sh
 	echo -e "* Ensure hardware clock is up to date..."
 	sudo hwclock --systohc
 	# So that "Open in Terminal" works inc Nemo
@@ -158,6 +153,7 @@ CONFIG=${XDG_CONFIG_HOME:-$HOME/.config}
 
 ENV=${1}
 
+# First thing to do, before symlinks
 for m in ${MERGE_DIRS}; do
 	if [ -f "${CONFIG}/${m}/${MERGE_CONFIG_FOLDER}/above" ]; then
 		merge_config $m ${ENV} true
@@ -166,6 +162,19 @@ for m in ${MERGE_DIRS}; do
 	fi
 done
 
+echo -e "\n=== Create symlink to *.${ENV} regular files ==="
+# Take all specific files and create a symlink pointing to it without the extension
+# This file will be used by applications
+for f in `find ${CONFIG} -type f -name "*.${ENV}"`; do
+	echo "${f%.*} → ${f}"
+	ln -sf ${f} ${f%.*}
+done
+# Take care of config files at home level, outside ${CONFIG} (e.g. Xresources)
+for f in `find ${HOME} -maxdepth 1 -mindepth 1 -type f -name "*.${ENV}"`; do
+	echo "${f%.*} → ${f}"
+	ln -sf ${f} ${f%.*}
+done
+
 echo -e "\n=== Copy changed configuration which resides in outer directory ==="
 # Destination files are regular files
 for f in `find ${CONFIG} -type f -name ${DEST_FILENAME}`; do
@@ -184,7 +193,6 @@ for f in `find ${CONFIG} -type f -name ${DEST_FILENAME}`; do
 		filename=${config_file##*/}
 		# Now copy to destination
 		real_dest=${DEST}/${subfolder}
-		echo $real_dest
         sudo mkdir -p ${real_dest}
 		absolute_source=`realpath "${DIR}/${config_file}"`
 		check_copy "${absolute_source}" "sudo cp ${absolute_source} ${real_dest}" "sudo rm ${real_dest}/${filename}"
@@ -195,21 +203,6 @@ if [ ! -z "$INIT" ]; then
 	init_system
 fi
 
-if [ ! -z ${ENV} ]; then
-	echo -e "\n=== Create symlink to *.${ENV} regular files ==="
-	# Take all specific files and create a symlink pointing to it without the extension
-	# This file will be used by applications
-	for f in `find ${CONFIG} -type f -name "*.${ENV}"`; do
-		echo "${f%.*} → ${f}"
-		ln -sf ${f} ${f%.*}
-	done
-	# Take care of config files at home level, outside ${CONFIG} (e.g. Xresources)
-	for f in `find ${HOME} -maxdepth 1 -mindepth 1 -type f -name "*.${ENV}"`; do
-		echo "${f%.*} → ${f}"
-		ln -sf ${f} ${f%.*}
-	done
-fi
-
 if [ ! -z "${WM_RESTART}" ]; then
 	echo -e "\n=== Restart graphical environment ==="
 	# Reload i3 configuration