djcev.com

#!/bin/sh
#
#  Copyright (c) 2015-2021, Cameron Vanderzanden. Available under the
#  terms of the 2-clause BSD license. Please see the file "LICENSE" in
#  the root dir of this repository for more information.
#
#- fixcolors.sh 2015/02/13 cev, last updated 2021/12/07
## Usage: fixcolors.sh [-dhVxX] [-c colordeffile] infile outfile
## 
##     Build a regex list and process a file. 'colordeffile' defines
##     the variable "colors" which is then used to generate a command
##     file (regex list). Sed then processes infile, using the regex list,
##     and writes to outfile. Simple.
## 
##       -c     Path to color definition file.
##       -d     RGB color output (255 255 255 form).
##       -h     Show help.
##       -V     Print version info.
##       -x     Hexadecimal RGB color output (#xxxxxx form). The default.
##       -X     Hexadecimal output without the prefixed #. (xxxxxx form).
## 

[ -x $HOME/.local/bin/cev_print.sh ] && . $HOME/.local/bin/cev_print.sh

self="${0##*'/'}"
colordef="./colordef_gruvbox.sh"
mode="hex"

cleanup() {
    if [ -n "$exprfile" -a -e $exprfile ]; then rm "$exprfile"; fi
}

die_colordefnotfound() {
    print_self error
    printf "%bcolor definition %b%s%b not found.%b\n"\
        "$_norm" "$_error" "$*" "$_norm" "$_clear" >&2
    exit 1
}

die_inputfiledoesnotexist() {
    print_self error
    printf "%binput file %b%s%b not found.%b\n" \
        "$_norm" "$_error" "$1" "$_norm" "$_clear" >&2
    exit 1
}

die_inputoutputsame() {
    print_self error
    printf "%binput file cannot be identical to output file.%b\n" \
        "$_norm" "$_clear" >&2
    exit 1
}

die_noinputfile() {
    print_self error
    printf "%bno input file specified.%b\n" "$_norm" "$_clear" >&2
    exit 1
}

die_nooutputfile() {
    print_self error
    printf "%bno output file specified.%b\n" "$_norm" "$_clear" >&2
    exit 1
}

while getopts "c:dhVxX?" option; do
    case $option in
        c) colordef="$OPTARG" ;;
        d) mode="rgb" ;;
        h) print_help && exit ;;
        V) print_version && exit ;;
        x) mode="hex" ;;
        X) mode="hex" && suppress_pound="True" ;;
        "?") print_help && exit ;;
    esac
    shift $((OPTIND - 1))
done

# make sure $1 was specified and exists
[ -z "$1" ] && die_noinputfile
[ ! -e "$1" ] && die_inputfiledoesnotexist "$1"
# make sure $2 was specified.
[ -z "$2" ] && die_nooutputfile
# make sure the two aren't the same
[ "$1" = "$2" ] && die_inputoutputsame

# source our color definitions.
if [ -e "$colordef" ]; then
    . "$colordef"
else
    die_colordefnotfound "$colordef"
fi

# build a big list of (simple) regexes in /tmp. Real ugly.
exprfile=$(mktemp ${TMPDIR:-/tmp}/${self}.1.XXXXXXXX)
trap cleanup EXIT
for h in $colors; do
    # eval is scary.
    if [ $mode = "hex" ]; then
        eval color=\"\$${h}\"
        if [ -n "$suppress_pound" ]; then
            color=${color#'#'}
        fi
    elif [ $mode = "rgb" ]; then
        # convert a hexadecimal color like '#rrggbb' into a decimal
        # color triple of the form 'r,g,b'
        eval hexcolor=\"\$${h}\"
        for c in $(printf "%s\n" $hexcolor | sed 's/\(.\)/\1 /g'); do
            if [ "$c" = "#" ]; then continue; fi
            x="${x}${c}"
            if [ ${#x} -eq 2 ]; then
                d=$((0x${x}))
                color="$color,$d"
                unset d x
            fi
        done
        color=${color#','}
    fi
    printf "s/%s/%s/g;\n" "${h}" "${color}" >> $exprfile
    unset color
done

# chuck the mess at sed. This could be handled better...
sed -f $exprfile $1 > $2