Much improved bash experience

bash.nix

@@ -0,0 +1,44 @@
+{ config, lib, pkgs, ... }:
+
+let
+  helpers = pkgs.writeText "bash.helpers"
+    (builtins.readFile ./static/bash/bash.helpers);
+
+  colors =
+    pkgs.writeText "bash.colors" (builtins.readFile ./static/bash/bash.colors);
+
+  env = pkgs.writeText "bash.env" (builtins.readFile ./static/bash/bash.env);
+
+in {
+  config.programs.bash = {
+    shellAliases = {
+      ll = "ls $LS_OPTIONS -alF";
+      l = "ls $LS_OPTIONS -CF";
+      la = "ls $LS_OPTIONS -A";
+      ".." = "cd ..";
+      "..." = "cd ../..";
+      rm = "rm --one-file-system --preserve-root";
+    };
+
+    shellInit = ''
+      if [ -d $HOME/bin ]; then
+        PATH="$HOME/bin:$PATH"
+      fi
+    '';
+
+    interactiveShellInit = ''
+      case $TERM in
+        screen|xterm*|rxvt*)
+          export LS_OPTIONS="--color=auto"
+          ;;
+        *)
+          export LS_OPTIONS=""
+          ;;
+      esac
+
+      . ${colors}
+      . ${helpers}
+      . ${env}
+    '';
+  };
+}

defaults.nix

@@ -9,6 +9,7 @@ in {
     ./hardware-configuration.nix
     ./packages/local.nix
     ./config/local.nix
+    ./bash.nix
     <home-manager/nixos>
   ];
 

static/bash/bash.colors

@@ -0,0 +1,72 @@
+# Reset
+Color_Off='\e[0m'       # Text Reset
+
+# Regular Colors
+Black='\e[0;30m'        # Black
+Red='\e[0;31m'          # Red
+Green='\e[0;32m'        # Green
+Yellow='\e[0;33m'       # Yellow
+Blue='\e[0;34m'         # Blue
+Purple='\e[0;35m'       # Purple
+Cyan='\e[0;36m'         # Cyan
+White='\e[0;37m'        # White
+
+# Bold
+BBlack='\e[1;30m'       # Black
+BRed='\e[1;31m'         # Red
+BGreen='\e[1;32m'       # Green
+BYellow='\e[1;33m'      # Yellow
+BBlue='\e[1;34m'        # Blue
+BPurple='\e[1;35m'      # Purple
+BCyan='\e[1;36m'        # Cyan
+BWhite='\e[1;37m'       # White
+
+# Underline
+UBlack='\e[4;30m'       # Black
+URed='\e[4;31m'         # Red
+UGreen='\e[4;32m'       # Green
+UYellow='\e[4;33m'      # Yellow
+UBlue='\e[4;34m'        # Blue
+UPurple='\e[4;35m'      # Purple
+UCyan='\e[4;36m'        # Cyan
+UWhite='\e[4;37m'       # White
+
+# Background
+On_Black='\e[40m'       # Black
+On_Red='\e[41m'         # Red
+On_Green='\e[42m'       # Green
+On_Yellow='\e[43m'      # Yellow
+On_Blue='\e[44m'        # Blue
+On_Purple='\e[45m'      # Purple
+On_Cyan='\e[46m'        # Cyan
+On_White='\e[47m'       # White
+
+# High Intensity
+IBlack='\e[0;90m'       # Black
+IRed='\e[0;91m'         # Red
+IGreen='\e[0;92m'       # Green
+IYellow='\e[0;93m'      # Yellow
+IBlue='\e[0;94m'        # Blue
+IPurple='\e[0;95m'      # Purple
+ICyan='\e[0;96m'        # Cyan
+IWhite='\e[0;97m'       # White
+
+# Bold High Intensity
+BIBlack='\e[1;90m'      # Black
+BIRed='\e[1;91m'        # Red
+BIGreen='\e[1;92m'      # Green
+BIYellow='\e[1;93m'     # Yellow
+BIBlue='\e[1;94m'       # Blue
+BIPurple='\e[1;95m'     # Purple
+BICyan='\e[1;96m'       # Cyan
+BIWhite='\e[1;97m'      # White
+
+# High Intensity backgrounds
+On_IBlack='\e[0;100m'   # Black
+On_IRed='\e[0;101m'     # Red
+On_IGreen='\e[0;102m'   # Green
+On_IYellow='\e[0;103m'  # Yellow
+On_IBlue='\e[0;104m'    # Blue
+On_IPurple='\e[0;105m'  # Purple
+On_ICyan='\e[0;106m'    # Cyan
+On_IWhite='\e[0;107m'   # White

static/bash/bash.env

@@ -0,0 +1,22 @@
+
+if [ -d /fudo/etc ]; then
+    FUDO_CONFIG=/fudo/etc
+fi
+
+if [ -f $HOME/.bash_local ]; then
+    . $HOME/.bash_local
+fi
+
+if [ -f $HOME/.bash_env ]; then
+    . $HOME/.bash_env
+fi
+
+if [ -f $HOME/.bash_prompt ]; then
+    . $HOME/.bash_prompt
+elif [ "${TERM}x" == "dumbx" ]; then
+    export PS1="\u@\h:\w > "
+elif [ $( type -t __makePS1 ) ]; then
+    export PROMPT_COMMAND=__makePS1
+else
+    export PS1="\u@\h:\w > "
+fi

static/bash/bash.helpers

@@ -0,0 +1,99 @@
+#!/usr/bin/env bash
+
+function __makeTerminalTitle() {
+    local title=''
+
+    local CURRENT_DIR="${PWD/#$HOME/\~}"
+
+    if [ -n "${SSH_CONNECTION}" ] || [ $UID -eq 0 ]; then
+        title+="`hostname`:${CURRENT_DIR} [`whoami`@`hostname -f`]"
+    else
+        title+="${CURRENT_DIR} [`whoami`]"
+    fi
+
+    echo -en '\033]2;'${title}'\007'
+}
+
+function __getMachineId() {
+    if [ -f /etc/machine-id ]; then
+        echo $((0x$(cat /etc/machine-id | head -c 15)))
+    elif [ -x "$(which hostid 2>&1)" ]; then
+        echo $(( (${#HOSTNAME}+0x$(hostid))))
+    else
+        echo "00000000"
+    fi
+}
+
+function __makePS1() {
+    local EXIT="$?"
+
+    if [ ! -n "${HOST_COLOR}" ]; then
+        local H=$(__getMachineId)
+        HOST_COLOR=$(tput setaf $((H%5 + 2))) # foreground
+    fi
+
+    PS1=''
+
+    if [ ${USER} == root ]; then
+        PS1+="\[${Red}\]" # root
+    elif [ ${USER} != ${LOGNAME} ]; then
+        PS1+="\[${Blue}\]" # normal user
+    else
+        PS1+="\[${Green}\]" # normal user
+    fi
+    PS1+="\u\[${Color_Off}\]"
+
+    if [ -n "${SSH_CONNECTION}" ] || [ $UID -eq 0 ]; then
+        PS1+="\[${Purple}\]@\[${Color_Off}\]"
+        PS1+="\[${UWhite}${HOST_COLOR}\]\h\[${Color_Off}\]" # host displayed only if ssh connection
+    fi
+
+    PS1+="\[${Purple}\]:\w" # working directory
+
+    # screen sessions
+    local SCREEN_PATHS="/var/run/screens/S-`whoami` /var/run/screen/S-`whoami` /var/run/uscreens/S-`whoami`"
+
+    for screen_path in ${SCREEN_PATHS}; do
+        if [ -d ${screen_path} ]; then
+            SCREEN_JOBS=`ls ${screen_path} | wc -w`
+            if [ ${SCREEN_JOBS} != 0 ]; then
+                local current_screen="$(echo ${STY} | cut -d '.' -f 1)"
+                if [ -n "${current_screen}" ]; then
+                    current_screen=":${current_screen}"
+                fi
+                PS1+=" \[${BGreen}\][s${SCREEN_JOBS}${current_screen}]\[${Color_Off}\]"
+            fi
+            break
+        fi
+    done
+
+    # git branch
+    if [ -x "`which git 2>&1`" ]; then
+        local branch="$(git name-rev --name-only HEAD 2>/dev/null)"
+
+        if [ -n "${branch}" ]; then
+            local git_status="$(git status --porcelain -b 2>/dev/null)"
+            local letters="$( echo "${git_status}" | grep --regexp=' \w ' | sed -e 's/^\s\?\(\w\)\s.*$/\1/' )"
+            local untracked="$( echo "${git_status}" | grep -F '?? ' | sed -e 's/^\?\(\?\)\s.*$/\1/' )"
+            local status_line="$( echo -e "${letters}\n${untracked}" | sort | uniq | tr -d '[:space:]' )"
+            PS1+=" \[${Blue}\](git: ${branch}"
+            if [ -n "${status_line}" ]; then
+                PS1+=" ${status_line}"
+            fi
+            PS1+=")\[${Color_Off}\]"
+        fi
+    fi
+
+    PS1+="\n"
+
+    # exit code
+    if [ ${EXIT} != 0 ]; then
+        PS1+="\[${BRed}\][!${EXIT}]\[${Color_Off}\]"
+    else
+        PS1+="\[${Green}\][${EXIT}]\[${Color_Off}\]"
+    fi
+
+    PS1+="\[${Purple}\]->\[${Color_Off}\] " # prompt
+
+    __makeTerminalTitle
+}

users/niten.nix

@@ -6,28 +6,7 @@ let
 
 in {
   programs = {
-    bash = {
-      enable = true;
-      shellAliases = {
-        ".." = "cd ..";
-        "..." = "cd ../..";
-        la = "ls -a";
-        ll = "ls -l";
-        lla = "ls -la";
-        rm = "rm --one-file-system --preserve-root";
-      };
-
-      extraInit = ''
-        case $TERM in
-          screen|xterm*|rxvt*)
-            shopt -s checkwinsize
-          ;;
-          *)
-            export LS_OPTIONS=""
-          ;;
-        esac
-      '';
-    };
+    bash = { enable = true; };
 
     git = {
       enable = true;