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"""
Get the version string by parsing a C++ header file. The version is expected
to be in the form of:
#define FOO_VERSION \
{ 0, 1, 0, "dev", 0 }
"""
from __future__ import unicode_literals
import argparse
import os
import io
import sys
OUTFILE_TPL = """
set({macro} "{semver}")
set({prefix}_API_VERSION "{api_version}")
set({prefix}_SO_VERSION "{so_version}")
"""
def main():
argparser = argparse.ArgumentParser(description=__doc__)
argparser.add_argument("-o", "--outfilepath", default="-")
argparser.add_argument("macro")
argparser.add_argument("filepath")
args = argparser.parse_args()
if args.outfilepath == "-":
args.outfilepath = os.dup(sys.stdout.fileno())
version = None
with io.open(args.filepath, "r", encoding="utf-8") as infile:
lineiter = iter(infile)
for line in lineiter:
if line.startswith("#define " + args.macro):
version = next(lineiter)
break
if version is None:
return 1
# Strip whitespace and brackets:
version = version.strip()[1:-1]
# Split along commas
verparts = [part.strip().strip('"') for part in version.split(",")]
prefix = args.macro
if not prefix.endswith("_VERSION"):
return 1
prefix = prefix[:-len("_VERSION")]
outputs = {
"macro": args.macro,
"prefix": prefix,
"so_version": ".".join(verparts[:2]),
"api_version": ".".join(verparts[:3]),
}
semver = ".".join(verparts[:3])
pre_release = "".join(verparts[3:])
if pre_release:
semver += "-" + pre_release
outputs["semver"] = semver
with io.open(args.outfilepath, "w", encoding="utf-8") as outfile:
outfile.write(OUTFILE_TPL.format(**outputs))
return 0
if __name__ == "__main__":
sys.exit(main())
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