nerves_time_zones

# Makefile for building the test database
#
# Makefile targets:
#
# all           build and install the database
# clean         clean build products and intermediates
#
# Variables to override:
#
# MIX_APP_PATH  path to the build directory
# CC_FOR_BUILD  C compiler

# Since this is for test purposes, be sure this matches what the tz (or tzdata)
# libraries use or you'll get discrepancies that are ok.
TZDATA_NAME=tzdata$(TZDATA_VERSION)
TZDATA_ARCHIVE_NAME=$(TZDATA_NAME).tar.gz
TZDATA_ARCHIVE_PATH=$(abspath $(TZDATA_ARCHIVE_NAME))
TZDATA_URL=https://data.iana.org/time-zones/releases/$(TZDATA_ARCHIVE_NAME)
ZIC_OPTIONS=-r @$(TZDATA_EARLIEST_DATE)/@$(TZDATA_LATEST_DATE)

PREFIX = $(MIX_APP_PATH)/priv
BUILD  = $(MIX_APP_PATH)/build
CC_FOR_BUILD=cc

calling_from_make:
	mix compile

all: $(PREFIX) $(BUILD) $(PREFIX)/zoneinfo

### Copied from tzcode Makefile

# Package name for the code distribution.
PACKAGE=        tzcode

# Version number for the distribution, overridden in the 'tarballs' rule below.
VERSION=        unknown

# Email address for bug reports.
BUGEMAIL=       tz@iana.org

# Backwards compatibility
BACKWARD=       backward

# Everything that's normally installed
PRIMARY_YDATA=  africa antarctica asia australasia \
                europe northamerica southamerica
YDATA=          $(PRIMARY_YDATA) etcetera
NDATA=          factory
TDATA=          $(YDATA) $(BACKWARD)

# Installation locations.
#
# The defaults are suitable for Debian, except that if REDO is
# posix_right or right_posix then files that Debian puts under
# /usr/share/zoneinfo/posix and /usr/share/zoneinfo/right are instead
# put under /usr/share/zoneinfo-posix and /usr/share/zoneinfo-leaps,
# respectively.  Problems with the Debian approach are discussed in
# the commentary for the right_posix rule (below).

# Everything is installed into subdirectories of TOPDIR, and used there.
# TOPDIR should be empty (meaning the root directory),
# or a directory name that does not end in "/".
# TOPDIR should be empty or an absolute name unless you're just testing.
TOPDIR =

# The default local timezone is taken from the file TZDEFAULT.
TZDEFAULT = $(TOPDIR)/etc/localtime

# The subdirectory containing installed program and data files, and
# likewise for installed files that can be shared among architectures.
# These should be relative file names.
USRDIR = usr
USRSHAREDIR = $(USRDIR)/share

# "Compiled" timezone information is placed in the "TZDIR" directory
# (and subdirectories).
# TZDIR_BASENAME should not contain "/" and should not be ".", ".." or empty.
TZDIR_BASENAME=	zoneinfo
TZDIR = $(TOPDIR)/$(USRSHAREDIR)/$(TZDIR_BASENAME)

tzcode/version.h: tzcode/version
	VERSION=`cat tzcode/version` && printf '%s\n' \
		'static char const PKGVERSION[]="($(PACKAGE)) ";' \
		"static char const TZVERSION[]=\"$$VERSION\";" \
		'static char const REPORT_BUGS_TO[]="$(BUGEMAIL)";' \
		>$@.out
	mv $@.out $@

tzcode/tzdir.h:
		printf '%s\n' >$@.out \
		  '#ifndef TZDEFAULT' \
		  '# define TZDEFAULT "$(TZDEFAULT)" /* default zone */' \
		  '#endif' \
		  '#ifndef TZDIR' \
		  '# define TZDIR "$(TZDIR)" /* TZif directory */' \
		  '#endif'
		mv $@.out $@

### End copied definitions

$(BUILD)/zic: tzcode/zic.c tzcode/version.h tzcode/tzdir.h
	@echo " HOSTCC $(notdir $@)"
	$(CC_FOR_BUILD) -DHAVE_GETTEXT=0 -o $@ tzcode/zic.c

$(PREFIX)/zoneinfo: $(BUILD)/zic $(BUILD)/tzdata/.extracted Makefile
	@echo "    ZIC $(notdir $@)"
	cd $(BUILD)/tzdata && $(BUILD)/zic -d $@ $(ZIC_OPTIONS) $(TDATA)

$(TZDATA_ARCHIVE_PATH):
	@echo "   CURL $(notdir $@)"
	curl -L $(TZDATA_URL) > $@

$(BUILD)/tzdata/.extracted: $(TZDATA_ARCHIVE_PATH)
	mkdir -p $(BUILD)/tzdata
	cd $(BUILD)/tzdata && tar xf $(TZDATA_ARCHIVE_PATH)
	touch $@

$(PREFIX) $(BUILD):
	mkdir -p $@

clean:
	$(RM) -r $(BUILD) $(PREFIX)

.PHONY: all clean calling_from_make

# Don't echo commands unless the caller exports "V=1"
${V}.SILENT: