src/color: Add working utility

2 files changed, 168 insertions, 0 deletions

diff --git a/deps.mk b/deps.mk
index b88fd94..f8fcde1 100644
--- a/deps.mk
+++ b/deps.mk
@@ -1,5 +1,6 @@
 sources.sh = \
 	src/assert-arg \
+	src/color \
 	src/now \
 	src/timestamp \
 	src/uuid \
diff --git a/src/color b/src/color
new file mode 100755
index 0000000..51c4f40
--- /dev/null
+++ b/src/color
@@ -0,0 +1,167 @@
+#!/bin/sh
+set -eu
+
+usage() {
+	cat <<-'EOF'
+		Usage:
+		  color -c COLOR TEXT
+		  color -l
+	EOF
+}
+
+END="\033[0m"
+
+black() {
+	BLACK="\033[0;30m"
+	printf "${BLACK}${1}${END}"
+}
+
+blackb() {
+	BLACK_B="\033[1;30m"
+	printf "${BLACK_B}${1}${END}"
+}
+
+blacki() {
+	BLACK_I="\033[0;90m"
+	printf "${BLACK_I}${1}${END}"
+}
+
+white() {
+	WHITE="\033[0;37m"
+	printf "${WHITE}${1}${END}"
+}
+
+whiteb() {
+	WHITE_B="\033[1;37m"
+	printf "${WHITE_B}${1}${END}"
+}
+
+red() {
+	RED="\033[0;31m"
+	printf "${RED}${1}${END}"
+}
+
+redb() {
+	RED_B="\033[1;31m"
+	printf "${RED_B}${1}${END}"
+}
+
+green() {
+	GREEN="\033[0;32m"
+	printf "${GREEN}${1}${END}"
+}
+
+greenb() {
+	GREEN_B="\033[1;32m"
+	printf "${GREEN_B}${1}${END}"
+}
+
+yellow() {
+	YELLOW="\033[0;33m"
+	printf "${YELLOW}${1}${END}"
+}
+
+yellowb() {
+	YELLOW_B="\033[1;33m"
+	printf "${YELLOW_B}${1}${END}"
+}
+
+blue() {
+	BLUE="\033[0;34m"
+	printf "${BLUE}${1}${END}"
+}
+
+blueb() {
+	BLUE_B="\033[1;34m"
+	printf "${BLUE_B}${1}${END}"
+}
+
+bluei() {
+	BLUE_I="\033[0;94m"
+	printf "${BLUE_I}${1}${END}"
+}
+
+purple() {
+	PURPLE="\033[0;35m"
+	printf "${PURPLE}${1}${END}"
+}
+
+
+purpleb() {
+	PURPLE_B="\033[1;35m"
+	printf "${PURPLE_B}${1}${END}"
+}
+
+lightblue() {
+	LIGHT_BLUE="\033[0;36m"
+	printf "${LIGHT_BLUE}${1}${END}"
+}
+
+lightblueb() {
+	LIGHT_BLUE_B="\033[1;36m"
+	printf "${LIGHT_BLUE_B}${1}${END}"
+}
+
+COLOR_LIST='
+black
+blackb
+white
+whiteb
+red
+redb
+green
+greenb
+yellow
+yellowb
+blue
+blueb
+purple
+purpleb
+lightblue
+lightblueb
+blacki
+bluei
+'
+list_colors() {
+	for c in $COLOR_LIST; do
+		printf '%s\n' "$("$c" "$c")"
+	done
+}
+
+
+COLOR_FN=''
+while getopts 'c:l' flag; do
+	case "$flag" in
+		(c)
+			EXISTS=false
+			for c in $COLOR_LIST; do
+				if [ "$OPTARG" = "$c" ]; then
+					EXISTS=true
+					break
+				fi
+			done
+			if [ "$EXISTS" = false ]; then
+				printf 'Invalid color: %s\n' "$OPTARG" >&2
+				exit 2
+			fi
+			COLOR_FN="$OPTARG"
+			;;
+		(l)
+			list_colors
+			exit
+			;;
+		(*)
+			usage >&2
+			exit 2
+			;;
+	esac
+done
+shift $((OPTIND - 1))
+
+TEXT="${1:-}"
+
+eval "$(assert-arg -- "$COLOR_FN" '-c COLOR')"
+eval "$(assert-arg -- "$TEXT"     'TEXT')"
+
+
+"$COLOR_FN" "$TEXT"