Added GNU Screen with its zsh integration plugin, a simple plugin loader for zsh, a `syntax-highlighting` and `autosuggestions` zsh plugins loaded from system

.dependencies/apt.list

@@ -11,6 +11,8 @@ nload
 # Non-essential but very useful program
 zsh
 terminfo # ~/.zshrc dependency
+zsh-syntax-highlighting # ZSH Plugin
+zsh-autosuggestions # ZSH Plugin
 iwconfig
 
 haveged # Useful for some programs at boot that needs a good entropy

screen/.config/screen/bin/battery.sh

@@ -0,0 +1,67 @@
+#!/bin/sh
+# Usage: ./battery.sh [--color [screen]]
+
+if [ "$1" = "--color" ]; then
+    case $2 in
+        "screen")
+            colgreen="\005{g}"
+            colyellow="\005{y}"
+            colred="\005{r}"
+            colred_blink="\005{+B r}"
+            colend="\005{-}"
+        ;;
+        "")
+            colgreen="\033[0;32m"
+            colyellow="\033[0;33m"
+            colred="\033[0;31m"
+            colred_blink="\033[5;31m"
+            colend="\033[0m"
+        ;;
+        *)
+            printf "Color coding not supported. Aborting...\n"
+            exit 1
+        ;;
+    esac
+fi
+
+pwr_lvl=""
+status=""
+multi_bat=0
+for folder in /sys/class/power_supply/BAT?/; do
+    pwr_lvl="$(cat "$folder/capacity")"
+    pwr_stat="$(cat "$folder/status")"
+    if [ "$pwr_stat" = "Discharging" ]; then
+        status="%▼"
+    elif [ "$pwr_stat" = "Charging" ]; then
+        status="%▲"
+    elif [ "$pwr_stat" = "Not charging" ]; then
+        status="%~"
+    elif [ "$pwr_stat" = "Unknown" ]; then
+        status="%?"
+    else
+        status="%/"
+    fi
+    if [ "$1" = "--color" ]; then
+        # if:
+        #   - <= 5 blinking red text
+        #   - <= 10 red text
+        #   - <= 20 yellow text
+        #   - > 20 green
+        if [ "$pwr_lvl" -le 8 ]; then
+            color="${colred_blink}"
+        elif [ "$pwr_lvl" -le 20 ]; then
+            color="${colred}"
+        elif [ "$pwr_lvl" -le 40 ]; then
+            color="${colyellow}"
+        else
+            color="${colgreen}"
+        fi
+    fi
+    if [ $multi_bat = 1 ]; then
+        sep="|"
+    else
+        sep=""
+        multi_bat=1
+    fi
+    printf "%b%s%s%b%s" "${color}" "${pwr_lvl}" "${status}" "${colend}" "${sep}"
+done

screen/.config/screen/bin/netinfo.sh

@@ -0,0 +1,79 @@
+#!/bin/sh
+# Usage: ./netinfo.sh [--color [screen]]
+
+if [ "$1" = "--color" ]; then
+    case $2 in
+        "screen")
+            colgreen="\005{g}"
+            colyellow="\005{y}"
+            colred="\005{r}"
+            colred_blink="\005{+B r}"
+            colend="\005{-}"
+        ;;
+        "")
+            colgreen="\033[0;32m"
+            colyellow="\033[0;33m"
+            colred="\033[0;31m"
+            colred_blink="\033[5;31m"
+            colend="\033[0m"
+        ;;
+        *)
+            printf "Color coding not supported. Aborting...\n"
+            exit 1
+        ;;
+    esac
+fi
+
+wifi_str() {
+    wifi_signal="$(cat < /proc/net/wireless | grep "$1" | awk '{print $3}' | tr -d '.')"
+    bar=""
+    case $wifi_signal in
+        [0-1][0-9])
+          color=${colred}
+          bar="▂___"
+        ;;
+        [2-3][0-9])
+          color=${colyellow}
+          bar="▂▄__"
+        ;;
+        [4-5][0-9])
+          color=${colgreen}
+          bar="▂▄▆_"
+        ;;
+        [6-7][0-9])
+          color=${colgreen}
+          bar="▂▄▆█"
+        ;;
+        *)
+          color=${colred_blink}
+          bar="????"
+        ;;
+    esac
+    printf "%b%s%b" "${color}" "${bar}" "${colend}"
+}
+
+IFACES="$(ip link show | awk '/^[0-9]+:/ {sub(/:/,"",$2); print $2","$9}')"
+
+multi_ifce=0
+for NET_IFACE in $IFACES ; do
+
+  [ "$(echo "$NET_IFACE" | cut -d ',' -f2)" = "DOWN" ] && continue
+
+  device="$(echo "$NET_IFACE" | cut -d ',' -f1)"
+  case $device in
+    wlp*)
+      [ $multi_ifce = 1 ] && STR_OUT="$STR_OUT|" || multi_ifce="1"
+      STR_OUT="$STR_OUT$(wifi_str "$device")"
+      ;;
+    enp*)
+      [ $multi_ifce = 1 ] && STR_OUT="$STR_OUT|" || multi_ifce="1"
+      STR_OUT="$STR_OUT$device"
+      ;;
+    usb*)
+      [ $multi_ifce = 1 ] && STR_OUT="$STR_OUT|" || multi_ifce="1"
+      STR_OUT="$STR_OUT$device"
+      ;;
+  esac
+done
+
+printf "%s" "${STR_OUT}"

screen/.config/zsh/plugins/gnu_screen.zsh

@@ -0,0 +1,22 @@
+#!/bin/zsh
+
+# If the terminal is `screen` set a proper title and hardstatus
+# See: https://gist.github.com/rampion/143727
+if [[ $TERM == "screen" || $TERM == "screen-256color" ]]; then
+    function print_precmdexec() {
+        local tilded_home="$(printf %s "$PWD" | sed "s|^$HOME|~|")"
+        # set hardstatus of tab window (%h) for screen
+        printf '\e]0;%s\a' "[$tilded_home]:$1"
+        # set the tab window title (%t) for screen
+        printf '\ek%s\e\\' "$2"
+    }
+    # called by zsh before executing a command
+    function preexec() {
+        local cmd=(${(z)1}) # the command string
+        print_precmdexec "$cmd" "$cmd[1]:t"
+    }
+    # called by zsh before showing the prompt
+    function precmd() {
+        print_precmdexec "$SHELL:t" "$SHELL:t"
+    }
+fi

screen/.screenrc

@@ -0,0 +1,28 @@
+#!/bin/screen -c
+# ~/.screenrc
+# Docs: https://www.gnu.org/software/screen/manual/
+
+startup_message off
+altscreen on
+term screen-256color
+
+# Enables use of shift-PgUp and shift-PgDn
+termcapinfo xterm*|rxvt*|kterm*|Eterm* ti@:te@
+
+# Set the default size of the scrollback buffer for all windows
+# Enter in copy mode `Ctrl+A [` and navigate with: PgUp/PgDn, arrows, vim keys
+# or in some terminals also the mouse wheel
+defscrollback 10000
+
+# backtick id lifespan autorefresh cmd args...
+backtick 1 10 10 $HOME/.config/screen/bin/battery.sh --color screen
+backtick 2 10 10 $HOME/.config/screen/bin/netinfo.sh --color screen
+
+# Statusbar
+hardstatus on
+hardstatus alwayslastline
+hardstatus string '%-Lw%?%E%{= ck}%:%{= mk}%? %n%f %t %{-}%+Lw%{= dd}%=%{b}%D %d %M %c%=%{K}[%{y}Avg: %l%{K}][%1`%{K}][%2`]'
+
+# Window captions
+caption always
+caption string '%?%F%{= gk}%:%{= wk}%? %n %?%F%{= Wk}%? %h%= '

zsh/.zshrc

@@ -1,3 +1,6 @@
+#!/bin/zsh
+# ~/.zshrc
+
 ### History
 HISTFILE="$HOME/.zsh_history"
 HISTSIZE=500000000
@@ -133,6 +136,11 @@ zstyle '*' single-ignored show
 # automatically load bash completion functions
 autoload -U +X bashcompinit && bashcompinit
 
+zsh_asugg_path="/usr/share/zsh-autosuggestions/zsh-autosuggestions.zsh"
+zsh_shigh_path="/usr/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh"
+[ -f "${zsh_asugg_path}" ] && . "${zsh_asugg_path}"
+[ -f "${zsh_shigh_path}" ] && . "${zsh_shigh_path}"
+unset zsh_asugg_path zsh_shigh_path
 
 ### Addons
 # Colored manpages
@@ -192,23 +200,33 @@ function zsh_git_theme() {
 }
 
 # Source: https://github.com/ohmyzsh/ohmyzsh/blob/master/lib/git.zsh
-zsh_tmp_path="$zsh_base_dir/git.zsh"
+zsh_tmp_path="$zsh_base_dir/plugins/git.zsh"
 if [ -f "$zsh_tmp_path" ]; then
-    zsh_git_theme && \
+    zsh_git_theme
-        source "$zsh_tmp_path" || echo "An error has occurred sourcing: $zsh_tmp_path"
 else
-    mkdir -p "$zsh_base_dir"
+    mkdir -p "$zsh_base_dir/plugins"
     src_url='https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/lib/git.zsh'
     echo "Downloading $src_url ..."
     eval "curl -s --max-time 5 -o \""$zsh_tmp_path"\" \"$src_url\"" && \
     unset src_url && \
-    zsh_git_theme && \
+    chmod +x "$zsh_tmp_path" && \
-    source "$zsh_tmp_path" || \
+    zsh_git_theme || \
-        echo "[Warning] Failed to create the file or unrecheable URL: $src_url" && \
+        echo "[Warning] Failed to create the file or unrecheable URL: $src_url"
-        rmdir --ignore-fail-on-non-empty "$zsh_base_dir"
 fi
 unfunction zsh_git_theme
 
+# Rudimentary plugin loader
+# Note: the files are loaded in alphabetical order
+# Notes about the `(xEXN)`:
+# - `.` plain files, should be comparable to a `-f` in a `find`
+# - `@` symbolic links
+# - `x`, `E`, `X` are respectively executable for owner, group and world
+# - the `N` is a nullglob applied for the current pattern
+# - See: https://zsh.sourceforge.io/Doc/Release/Expansion.html#Glob-Qualifiers
+for plugin_f in "$zsh_base_dir/plugins/"*(.zsh|.zsh-theme)(xEXN); do
+    source $plugin_f || printf "An error has occurred sourcing: %s\n" "$plugin_f"
+done
+
 # For `prompt_subst` see:
 # https://github.com/agnoster/agnoster-zsh-theme/pull/12
 # Fork used:
@@ -226,9 +244,7 @@ else
     setopt prompt_subst && \
     source "$zsh_tmp_path" || \
         echo "[Warning] Failed to create the file or unrecheable URL: $src_url" && \
-        rmdir --ignore-fail-on-non-empty "$zsh_base_dir" && \
         PS1="%B%{$fg[red]%}[%{$fg[yellow]%}%n%{$fg[green]%}@%{$fg[blue]%}%M %{$fg[magenta]%}%~%{$fg[red]%}]%{$reset_color%}$%b "
 fi
 unset zsh_tmp_path
 unset zsh_base_dir
-