# The Singe the util scripts run:  the one the default preset (linux-x86_64) leaves in .builddir,
# named for the version in CMakeLists.txt exactly as the build names it.  Looking it up by name
# rather than taking the first Singe in a folder means a binary an older version or another preset
# left behind is never the one recorded with:  sorted, Singe-v3.00- comes before Singe-v3.00b1-.
# Run as a script it prints the path, for the shell scripts:  BIN=$(python3 util/singeBinary.py)
import os
import re

REPO = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


def singeBinary():
	path = os.path.join(REPO, ".builddir", "Singe-v%s-Linux-x86_64" % singeVersion())
	if not os.access(path, os.X_OK):
		raise SystemExit("no %s;  build the linux-x86_64 preset first" % os.path.relpath(path, REPO))
	return path


def singeVersion():
	# The four numbers of the project() line:  patch 1 means a beta and tweak says which, so
	# 3.00.1.2 is 3.00b2, as CMakeLists.txt makes SINGE_VERSION_FULL.
	text = open(os.path.join(REPO, "CMakeLists.txt"), encoding="utf-8").read()
	found = re.search(r"^project\(singe2 VERSION (\d+)\.(\d+)\.(\d+)\.(\d+)", text, re.M)
	if not found:
		raise SystemExit("CMakeLists.txt has no four-number project() version")
	major, minor, patch, tweak = found.groups()
	if patch == "1":
		return "%s.%sb%s" % (major, minor, tweak)
	return "%s.%s" % (major, minor)


if __name__ == "__main__":
	print(singeBinary())