new: [myc-update] set color mode for yaml in nano

bin/myc-update

@@ -113,6 +113,48 @@ sed -ri 's/^# (export LS_OPTIONS=.--color=auto.)/\1/;
 EOF
 fi
 
+if [ -d "/usr/share/nano" && ! -e "/usr/share/nano/yaml.nanorc" ]; then
+    Wrap -d "Enable colored yaml syntax in nano" <<EOF || exit 1
+    cat << 'EOF' > /usr/share/nano/yaml.nanorc
+    # Supports `YAML` files
+    syntax "YAML" "\.ya?ml$"
+    header "^(---|===)" "%YAML"
+
+    ## Keys
+    color brightmagenta "^\s*[\$A-Za-z0-9_-]+\:"
+    color brightmagenta "^\s*@[\$A-Za-z0-9_-]+\:"
+
+    ## Values
+    color yellow ":\s.+$"
+    ## Booleans
+    icolor brightcyan " (y|yes|n|no|true|false|on|off)$"
+    ## Numbers
+    color brightred " [[:digit:]]+(\.[[:digit:]]+)?"
+    ## Arrays
+    color red "\[" "\]" ":\s+[|>]" "^\s*- "
+    ## Reserved
+    color green "(^| )!!(binary|bool|float|int|map|null|omap|seq|set|str) "
+
+    ## Comments
+    color cyan "#.*$"
+
+    ## Errors
+    ##color ,red ":\w.+$"
+    ##color ,red ":'.+$"
+    ##color ,red ":".+$"
+    ##color ,red "\s+$"
+
+    ## Non closed quote
+    color ,red "['\"][^['\"]]*$"
+
+    ## Closed quotes
+    color yellow "['\"].*['\"]"
+
+    ## Equal sign
+    color white ":( |$)"
+    EOF
+EOF
+fi
 
 for keyfile in {/root,/home/debian}/.ssh/authorized_keys; do
     [ -e "$keyfile" ] || continue