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# Useful functions
# Returns the first argument (typically a directory), if the file or directory
# named by concatenating the first and optionally second argument
# (directory and optional filename) exists
dir_if_exists = $(if $(wildcard $(1)$(2)),$(1))
# Run a shell script if it exists. Stops make on error.
runscript_if_exists = \
$(if $(wildcard $(1)), \
$(if $(findstring 0, \
$(lastword $(shell $(abspath $(wildcard $(1))); echo $$?))), \
$(info Info: $(1) success), \
$(error ERROR: $(1) failed)))
# For message printing: pad the right side of the first argument with spaces to
# the number of bytes indicated by the second argument.
space_pad_to = $(shell echo $(1) " " | head -c$(2))
# Call with some text, and a prefix tag if desired (like [AUTODETECTED]),
show_config_info = $(call arduino_output,- $(call space_pad_to,$(2),20) $(1))
# Call with the name of the variable, a prefix tag if desired (like [AUTODETECTED]),
# and an explanation if desired (like (found in $$PATH)
show_config_variable = $(call show_config_info,$(1) = $($(1)) $(3),$(2))
# Just a nice simple visual separator
show_separator = $(call arduino_output,-------------------------)
$(call show_separator)
$(call arduino_output,Arduino.mk Configuration:)
########################################################################
#
# Detect OS
ifeq ($(OS),Windows_NT)
CURRENT_OS = WINDOWS
else
UNAME_S := $(shell uname -s)
ifeq ($(UNAME_S),Linux)
CURRENT_OS = LINUX
endif
ifeq ($(UNAME_S),Darwin)
CURRENT_OS = MAC
endif
endif
$(call show_config_variable,CURRENT_OS,[AUTODETECTED])
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