157 lines
3.9 KiB
Bash
Executable File
157 lines
3.9 KiB
Bash
Executable File
#!/bin/bash
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function usage {
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echo -e ' High Beam Highlighter
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- a trial to create a very generic modifyable
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syntax highlighter.
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Example rules: ( ~/.highbeamrc )
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--------------------
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RULES=(
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"[0-9]" "$c" # Show numbers with Cyan color. NOTE: since the colors are represented with numbers, having this later in the rules will break coloring!
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"$USER[ ]\+$USER" "$BC$K" # Use quotes to have rules with spaces. This colors the "ls -la" usernames. background cyan, black text
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status "$g" # simple word matching, coloring green
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"^d[^ ]*" "$G" # color words at the beginning of line, starting with d. color bright green
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"q.\{0,3\}r" "$Y" # q*r with maximum 3 characters in between. color bright yellow
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)
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--------------------
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Rules can be also exressed as a space separated list variable:
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export HB_RULES='\''"[0-9]" "$C" "g" "$Y"'\''
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HB_RULES are appended to other rules
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Bright colors: $R $G $B $Y $M $C $W $K
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Dark colors: $r $g $b $y $m $c $w $k
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Modify to bright version by prefixing with $H (e.g. $H$g)
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Background colors: $BR $BG $BB $BY $BC $BM $BW
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Underline: $U
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Usage: highbeam [-c] [-h] [-f config]
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-c Be case sensitive
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-D Print current rules, not the input
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-h Help
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-f Define config file (default ~/.highbeamrc)
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-r Define rules with a string, replaces the other rules
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-r '\''"land[^[:space:]]\+" "$G" "sky" "$B"'\''
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'
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}
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E='\x1b['
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H="${E}1m"
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Z="${E}0m"
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# list of text colors:
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K="${E}1;30m"
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R="${E}1;31m"
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G="${E}1;32m"
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B="${E}1;34m"
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Y="${E}1;33m"
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M="${E}1;35m"
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C="${E}1;36m"
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W="${E}1;37m"
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k="${E}30m"
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r="${E}31m"
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g="${E}32m"
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b="${E}34m"
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y="${E}33m"
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m="${E}35m"
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c="${E}36m"
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w="${E}37m"
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# list of BG colors:
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BR="${E}41m"
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BG="${E}42m"
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BB="${E}44m"
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BY="${E}43m"
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BM="${E}45m"
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BC="${E}46m"
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BW="${E}47m"
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# lines
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U="${E}4m"
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CONF_FILE=~/.highbeamrc
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CONF_LINE=""
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FLAGS="ig"
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PRINT=0
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while getopts chf:r:D opt
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do case "$opt" in
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c)
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FLAGS="g"
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;;
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h)
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usage
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exit
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;;
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f)
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CONF_FILE=$OPTARG
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;;
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r)
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CONF_LINE=( $( eval echo $OPTARG ) )
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;;
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D)
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PRINT=1
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;;
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esac
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done
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[[ -z "$CONF_LINE" ]] && {
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# user rules:
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[[ -e "${CONF_FILE}" ]] && {
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. "${CONF_FILE}" || {
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echo You may have wrong format in "${CONF_FILE}" >&2
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usage >&2
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exit 1
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}
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}
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for (( rIndex=0; rIndex<${#RULES[@]}; rIndex++ ));
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do REGEX="$REGEX -e 's/\(${RULES[$rIndex]}\)/${RULES[$(( $rIndex + 1 ))]}\1${Z}/${FLAGS}'"
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rIndex=$(( $rIndex + 1 ))
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done
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} || {
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# string fed rules
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for (( rIndex=0; rIndex<${#CONF_LINE[@]}; rIndex++ ));
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do REGEX="$REGEX -e 's/\(${CONF_LINE[$rIndex]}\)/${CONF_LINE[$(( $rIndex + 1 ))]}\1${Z}/${FLAGS}'"
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rIndex=$(( $rIndex + 1 ))
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done
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}
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# env variable fed rules
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[[ -z "$HB_RULES" ]] || {
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CONF_ENV=( $( eval echo "$HB_RULES" ) )
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for (( rIndex=0; rIndex<${#CONF_ENV[@]}; rIndex++ ));
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do REGEX="$REGEX -e 's/\(${CONF_ENV[$rIndex]}\)/${CONF_ENV[$(( $rIndex + 1 ))]}\1${Z}/${FLAGS}'"
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rIndex=$(( $rIndex + 1 ))
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done
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}
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[[ $PRINT -eq 1 ]] && {
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echo "From $CONF_FILE:"
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for (( rIndex=0; rIndex<${#RULES[@]}; rIndex++ ));
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do printf "%s\\t%s" "${RULES[$rIndex]}" "${RULES[$(( $rIndex + 1 ))]}"
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rIndex=$(( $rIndex + 1 ))
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done
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echo "From argument switches:"
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for (( rIndex=0; rIndex<${#CONF_LINE[@]}; rIndex++ ));
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do printf "%s\\t%s" "${CONF_LINE[$rIndex]}" "${CONF_LINE[$(( $rIndex + 1 ))]}"
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rIndex=$(( $rIndex + 1 ))
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done
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echo "From HB_RULES environment:"
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for (( rIndex=0; rIndex<${#CONF_ENV[@]}; rIndex++ ));
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do printf "%s\\t%s" "${CONF_ENV[$rIndex]}" "${CONF_ENV[$(( $rIndex + 1 ))]}"
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rIndex=$(( $rIndex + 1 ))
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done
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#~ echo ${CONF_ENV[@]}
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#~ echo $HB_RULES
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#~ echo $REGEX
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exit
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}
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[[ -z "$REGEX" ]] && {
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cat -
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} || {
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eval sed $REGEX || echo Maybe errors in your rules: "$REGEX" >&2
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}
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