Revamp bashum color mappings and demo

Finally stop using few-low-lettered globals; use proper Shellfu compliant
naming instead.

Also have separate variables for use in Bash PS*; these need extra chars
for hinting.

dotfiles/bash/colors.bashrc

@@ -1,26 +1,68 @@
 #!/bin/bash
 
 # get some fancy colorz
-      black="\[\033[0;30m\]"
-        red="\[\033[0;31m\]"
-      green="\[\033[0;32m\]"
-     yellow="\[\033[0;33m\]"
-       blue="\[\033[0;34m\]"
-    magenta="\[\033[0;35m\]"
-       cyan="\[\033[0;36m\]"
-      white="\[\033[0;37m\]"
-     lblack="\[\033[1;30m\]"
-       lred="\[\033[1;31m\]"
-     lgreen="\[\033[1;32m\]"
-    lyellow="\[\033[1;33m\]"
-      lblue="\[\033[1;34m\]"
-   lmagenta="\[\033[1;35m\]"
-      lcyan="\[\033[1;36m\]"
-     lwhite="\[\033[1;37m\]"
-     normal="\[\033[1;0m\]"
+BASHUM_COLOR_BLACK=$'\033[0;30m'
+BASHUM_COLOR_RED=$'\033[0;31m'
+BASHUM_COLOR_GREEN=$'\033[0;32m'
+BASHUM_COLOR_YELLOW=$'\033[0;33m'
+BASHUM_COLOR_BLUE=$'\033[0;34m'
+BASHUM_COLOR_MAGENTA=$'\033[0;35m'
+BASHUM_COLOR_CYAN=$'\033[0;36m'
+BASHUM_COLOR_WHITE=$'\033[0;37m'
+BASHUM_COLOR_LBLACK=$'\033[1;30m'
+BASHUM_COLOR_LRED=$'\033[1;31m'
+BASHUM_COLOR_LGREEN=$'\033[1;32m'
+BASHUM_COLOR_LYELLOW=$'\033[1;33m'
+BASHUM_COLOR_LBLUE=$'\033[1;34m'
+BASHUM_COLOR_LMAGENTA=$'\033[1;35m'
+BASHUM_COLOR_LCYAN=$'\033[1;36m'
+BASHUM_COLOR_LWHITE=$'\033[1;37m'
+BASHUM_COLOR_NORMAL=$'\033[1;0m'
 
-coldemo="colors demo: \n$black  black$red  red$green  green$yellow  yellow"
-coldemo="${coldemo}$blue  blue$magenta  magenta$cyan  cyan$white  white\n "
-coldemo="${coldemo}$lblack lblack$lred lred$lgreen lgreen$lyellow lyellow"
-coldemo="${coldemo}$lblue lblue$lmagenta lmagenta$lcyan lcyan$lwhite lwhite\n"
-coldemo="${coldemo}$normal normal\n"
+# get some fancy colorz
+BASHUM_PS_COLOR_BLACK=$'\[\033[0;30m\]'
+BASHUM_PS_COLOR_RED=$'\[\033[0;31m\]'
+BASHUM_PS_COLOR_GREEN=$'\[\033[0;32m\]'
+BASHUM_PS_COLOR_YELLOW=$'\[\033[0;33m\]'
+BASHUM_PS_COLOR_BLUE=$'\[\033[0;34m\]'
+BASHUM_PS_COLOR_MAGENTA=$'\[\033[0;35m\]'
+BASHUM_PS_COLOR_CYAN=$'\[\033[0;36m\]'
+BASHUM_PS_COLOR_WHITE=$'\[\033[0;37m\]'
+BASHUM_PS_COLOR_LBLACK=$'\[\033[1;30m\]'
+BASHUM_PS_COLOR_LRED=$'\[\033[1;31m\]'
+BASHUM_PS_COLOR_LGREEN=$'\[\033[1;32m\]'
+BASHUM_PS_COLOR_LYELLOW=$'\[\033[1;33m\]'
+BASHUM_PS_COLOR_LBLUE=$'\[\033[1;34m\]'
+BASHUM_PS_COLOR_LMAGENTA=$'\[\033[1;35m\]'
+BASHUM_PS_COLOR_LCYAN=$'\[\033[1;36m\]'
+BASHUM_PS_COLOR_LWHITE=$'\[\033[1;37m\]'
+BASHUM_PS_COLOR_NORMAL=$'\[\033[1;0m\]'
+
+#shellcheck disable=SC1087
+bashum__colordemo() {
+    local bla=$BASHUM_COLOR_BLACK
+    local red=$BASHUM_COLOR_RED
+    local gre=$BASHUM_COLOR_GREEN
+    local yel=$BASHUM_COLOR_YELLOW
+    local blu=$BASHUM_COLOR_BLUE
+    local mag=$BASHUM_COLOR_MAGENTA
+    local cya=$BASHUM_COLOR_CYAN
+    local whi=$BASHUM_COLOR_WHITE
+    local lbla=$BASHUM_COLOR_LBLACK
+    local lred=$BASHUM_COLOR_LRED
+    local lgre=$BASHUM_COLOR_LGREEN
+    local lyel=$BASHUM_COLOR_LYELLOW
+    local lblu=$BASHUM_COLOR_LBLUE
+    local lmag=$BASHUM_COLOR_LMAGENTA
+    local lcya=$BASHUM_COLOR_LCYAN
+    local lwhi=$BASHUM_COLOR_LWHITE
+    local n=$BASHUM_COLOR_NORMAL
+    echo "black:   $bla[abc123]$n   lblack: $lbla[abc123]$n"
+    echo "red:     $red[abc123]$n     lred: $lred[abc123]$n"
+    echo "yellow:  $yel[abc123]$n  lyellow: $lyel[abc123]$n"
+    echo "green:   $gre[abc123]$n   lgreen: $lgre[abc123]$n"
+    echo "cyan:    $cya[abc123]$n    lcyan: $lcya[abc123]$n"
+    echo "blue:    $blu[abc123]$n    lblue: $lblu[abc123]$n"
+    echo "magenta: $mag[abc123]$n lmagenta: $lmag[abc123]$n"
+    echo "white:   $whi[abc123]$n   lwhite: $lwhi[abc123]$n"
+}

dotfiles/bash/defaults.bashrc

@@ -10,5 +10,5 @@ __bashum__mkps1user() {
 }
 
 __bashum__mkps1host() {
-    echo "$blue\h$normal";
+    echo "$BASHUM_PS_COLOR_BLUE\h$BASHUM_PS_COLOR_NORMAL";
 }

dotfiles/bash/post.bashrc

@@ -42,25 +42,25 @@ __bashum__mkps1() {
     # and ~/.bash/host/*.bashrc
     test -n "$SSH_CONNECTION" \
      && echo -n "$(__bashum__mkps1user)"    # username only when on ssh
-    echo -n "$lwhite@"                      # nice shiny at sign
+    echo -n "$BASHUM_PS_COLOR_LWHITE@"         # nice shiny at sign
     echo -n "$(__bashum__mkps1host)"        # hostname colored per host
-    echo -n "$yellow"                       #\
+    echo -n "$BASHUM_PS_COLOR_LYELLOW"         #\
     echo -n     '$(__bashum__task_context)' # > taskwarrior's context
-    echo -n "$normal"                       #/
-    echo -n "$lwhite:"                      # nice shiny colon
-    echo -n "$lblue\w$normal"               # current workdir
-    echo -n "$green"                        #\
+    echo -n "$BASHUM_PS_COLOR_NORMAL"          #/
+    echo -n "$BASHUM_PS_COLOR_LWHITE:"         # nice shiny colon
+    echo -n "$BASHUM_PS_COLOR_BLUE\w$BASHUM_PS_COLOR_NORMAL"   # current workdir
+    echo -n "$BASHUM_PS_COLOR_GREEN"           #\
     echo -n     '$(__git_ps1 "(%s)")'       # > git's PS1
-    echo -n "$normal"                       #/
-    echo -n "$lred"                         #\
+    echo -n "$BASHUM_PS_COLOR_NORMAL"          #/
+    echo -n "$BASHUM_PS_COLOR_LRED"            #\
     echo -n     '$(__bashum__lastrv -r)'    # > last exit status (nothing if zero)
-    echo -n "$normal"                       #/
+    echo -n "$BASHUM_PS_COLOR_NORMAL"          #/
     echo '$ '                               # obligatory dollar
 }
 
 #shellcheck disable=SC2154
 __bashum__mkps2() {
-    echo "$lwhite·$blue>$yellow>$white>$normal "
+    echo "$BASHUM_PS_COLOR_LWHITE·$BASHUM_PS_COLOR_BLUE>$BASHUM_PS_COLOR_YELLOW>$BASHUM_PS_COLOR_WHITE>$BASHUM_PS_COLOR_NORMAL "
 }
 
 # and use to assemble own PS1