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semver.py
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Mon, May 13, 19:44

semver.py
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#!/usr/bin/env python3
import os
import re
import subprocess
def run_git_command(args):
git_dir = os.path.realpath(os.path.join(os.path.dirname(__file__), os.pardir))
cmd = ["git"] + args
p = subprocess.Popen(
cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, cwd=git_dir
)
stdout = p.communicate()[0].strip().decode()
if p.returncode != 0:
return None, p.returncode
return stdout, p.returncode
def _split_git_describe(describe):
describe_mo = re.search(
r"^(?P<tag>.+)"
r"-(?P<distance>\d+)"
r"-g(?P<short>[0-9a-f]+)"
r"(-(?P<dirty>dirty))?$",
describe,
)
if describe_mo:
pieces = {}
pieces["tag"] = describe_mo.group("tag")
# distance: number of commits since tag
pieces["distance"] = int(describe_mo.group("distance"))
# commit: short hex revision ID
pieces["short"] = describe_mo.group("short")
if describe_mo.group("dirty"):
pieces["dirty"] = describe_mo.group("dirty")
return pieces
return None
semver_re = re.compile(
r"^(?P<major>0|[1-9]\d*)"
r"(\.(?P<minor>0|[1-9]\d*))?"
r"(\.(?P<patch>0|[1-9]\d*))?"
r"(?:-(?P<prerelease>(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?"
r"(?:\+(?P<build>[0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$"
)
def _parse_semver(version):
pieces = {}
semver_mo = semver_re.search(version)
if semver_mo:
for p in ["major", "minor", "patch", "prerelease", "build"]:
if semver_mo.group(p):
pieces[p] = semver_mo.group(p)
return pieces
def get_git_version():
out, rc = run_git_command(["rev-parse", "--git-dir"])
if rc != 0:
return None
git_describe, rc = run_git_command(
["describe", "--tags", "--dirty", "--always", "--match", "v*"]
)
if '-g' in git_describe:
# TAG-DISTANCE-gHEX
pieces = _split_git_describe(git_describe)
else:
# tag only or no tag and hash
pieces = {"tag": git_describe}
# major.minor.patch-prerelease+build
if not pieces or ("tag" not in pieces):
return None
semver_mo = semver_re.search(pieces["tag"][1:])
if semver_mo:
for p in ["major", "minor", "patch", "prerelease", "build"]:
if semver_mo.group(p):
pieces[p] = semver_mo.group(p)
return pieces
def get_git_attributes_version():
file_dir = os.path.dirname(os.path.realpath(os.path.abspath(__file__)))
attributes = None
pieces = None
with open(os.path.join(file_dir, "git_info")) as fh:
describe_re = re.compile(r"describe: ([^$].*[^$])")
for line in fh:
mo = describe_re.search(line)
if mo:
attributes = mo.group(1)
break
if attributes:
pieces = _split_git_describe(attributes)
return pieces
def get_ci_version():
pieces = None
if "CI_AKANTU_INSTALL_PREFIX" not in os.environ:
return None
ci_akantu_install_prefix = os.environ["CI_AKANTU_INSTALL_PREFIX"]
akantu_dir = os.path.join(ci_akantu_install_prefix, "lib", "cmake", "Akantu")
cmake_config = os.path.join(akantu_dir, "AkantuConfig.cmake")
if not os.path.exists(cmake_config):
return None
version = None
with open(cmake_config, "r") as fh:
version_re = re.compile(r"^set\(AKANTU_VERSION (.*)\)$")
for line in fh:
version_mo = version_re.search(line)
if version_mo:
version = version_mo.group(1)
break
if not version:
return None
pieces = _parse_semver(version)
return pieces
def get_version_file():
version_path = os.path.join(
os.path.realpath(
os.path.abspath(os.path.join(os.path.dirname(__file__), os.path.pardir))
),
"VERSION",
)
if not os.path.exists(version_path):
return None
version = None
with open(version_path, "r") as fh:
version = fh.readline()
if not version:
return None
pieces = _parse_semver(version)
return pieces
def get_version():
pieces = None
if not pieces:
pieces = get_ci_version()
if not pieces:
pieces = get_git_version()
if not pieces:
pieces = get_git_attributes_version()
if not pieces:
pieces = get_version_file()
if not pieces:
raise Exception("No version could be determined")
semver_build = []
if "build" in pieces:
semver_build = [pieces["build"]]
if "distance" in pieces:
semver_build.extend([str(pieces["distance"]), "g" + pieces["short"]])
if "dirty" in pieces and pieces["dirty"]:
semver_build.append(pieces["dirty"])
if semver_build:
pieces["build_part"] = "+" + ".".join(semver_build)
else:
pieces["build_part"] = ""
if "prerelease" in pieces:
pieces["prerelease"] = "-" + pieces["prerelease"]
else:
pieces["prerelease"] = ""
semver = "{major}.{minor}.{patch}{prerelease}{build_part}".format(**pieces)
if "CI_MERGE_REQUEST_ID" in os.environ:
semver = "{}.mr{}".format(semver, os.environ["CI_MERGE_REQUEST_ID"])
return semver
if __name__ == "__main__":
print(get_version())

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