1ifeq ($(words $(filter $(abspath $(lastword $(MAKEFILE_LIST))),$(abspath $(MAKEFILE_LIST)))),1)
2
3_colors.mk := $(lastword $(MAKEFILE_LIST))
4include $(dir $(_colors.mk))prelude.mk
5
6# CSI is the "control sequence introducer" that initiates a control
7# seqnece.
8_csi := $(shell printf '\033[')
9
10# Usage: $(call _cs,INT_ARG1 INT_ARG2..., OPERATION)
11#
12# Evaluate to a "control sequence" for the terminal.
13_cs = $(_csi)$(call joinlist,;,$1)$(strip $2)
14
15# Usage: $(call _sgr, prop1=val1 prop2=val2)
16#
17# Evaluate to the SGR control sequence to change how text is rendered,
18# using human-friendly key/value pairs.
19#
20# Unknown key/value pairs are ignored.
21#
22# Known settings:
23#
24# `reset` reset all properties
25#
26# `wgt=bold` font weight = bold
27# `wgt=normal` font weight = normal (not bold)
28#
29# `fg=blk` foreground color = black
30# `fg=red` foreground color = red
31# `fg=grn` foreground color = green
32# `fg=yel` foreground color = yellow
33# `fg=blu` foreground color = blue
34# `fg=prp` foreground color = purple
35# `fg=cyn` foreground color = cyan
36# `fg=wht` foreground color = white
37# `fg=def` foreground color = default
38_sgr = $(call _cs,$(foreach param,$1,$(_sgr/$(subst =,/,$(param)))),m)
39
40# The definitions of those settings:
41_sgr/reset = 0
42_sgr/wgt/bold = 1
43_sgr/wgt/normal = 22
44_sgr/fg/blk = 30
45_sgr/fg/red = 31
46_sgr/fg/grn = 32
47_sgr/fg/yel = 33
48_sgr/fg/blu = 34
49_sgr/fg/prp = 35
50_sgr/fg/cyn = 36
51_sgr/fg/wht = 37
52# 38 is 8bit/24bit color
53_sgr/fg/def = 39
54
55# Now expose things for public consumption...
56#
57# Choose colors carefully. If they don't work on both a black
58# background and a white background, pick other colors (so white,
59# yellow, and black are poor choices).
60RED = $(call _sgr,wgt=bold fg=red)
61GRN = $(call _sgr,wgt=bold fg=grn)
62BLU = $(call _sgr,wgt=bold fg=blu)
63CYN = $(call _sgr,wgt=bold fg=cyn)
64BLD = $(call _sgr,wgt=bold)
65END = $(call _sgr,reset)
66
67endif
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