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borg/attic/_version.py

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# This file helps to compute a version number in source trees obtained from
# git-archive tarball (such as those provided by githubs download-from-tag
# feature). Distribution tarballs (built by setup.py sdist) and build
# directories (produced by setup.py build) will contain a much shorter file
# that just contains the computed version number.
# This file is released into the public domain. Generated by
# versioneer-0.14 (https://github.com/warner/python-versioneer)
import errno
import os
import re
import subprocess
import sys
# these strings will be replaced by git during git-archive
git_refnames = "$Format:%d$"
git_full = "$Format:%H$"
# these strings are filled in when 'setup.py versioneer' creates _version.py
tag_prefix = ""
parentdir_prefix = "borgbackup-"
versionfile_source = "attic/_version.py"
def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False):
assert isinstance(commands, list)
p = None
for c in commands:
try:
# remember shell=False, so use git.cmd on windows, not just git
p = subprocess.Popen([c] + args, cwd=cwd, stdout=subprocess.PIPE,
stderr=(subprocess.PIPE if hide_stderr
else None))
break
except EnvironmentError:
e = sys.exc_info()[1]
if e.errno == errno.ENOENT:
continue
if verbose:
print("unable to run %s" % args[0])
print(e)
return None
else:
if verbose:
print("unable to find command, tried %s" % (commands,))
return None
stdout = p.communicate()[0].strip()
if sys.version_info[0] >= 3:
stdout = stdout.decode()
if p.returncode != 0:
if verbose:
print("unable to run %s (error)" % args[0])
return None
return stdout
def versions_from_parentdir(parentdir_prefix, root, verbose=False):
# Source tarballs conventionally unpack into a directory that includes
# both the project name and a version string.
dirname = os.path.basename(root)
if not dirname.startswith(parentdir_prefix):
if verbose:
print("guessing rootdir is '%s', but '%s' doesn't start with "
"prefix '%s'" % (root, dirname, parentdir_prefix))
return None
return {"version": dirname[len(parentdir_prefix):], "full": ""}
def git_get_keywords(versionfile_abs):
# the code embedded in _version.py can just fetch the value of these
# keywords. When used from setup.py, we don't want to import _version.py,
# so we do it with a regexp instead. This function is not used from
# _version.py.
keywords = {}
try:
f = open(versionfile_abs, "r")
for line in f.readlines():
if line.strip().startswith("git_refnames ="):
mo = re.search(r'=\s*"(.*)"', line)
if mo:
keywords["refnames"] = mo.group(1)
if line.strip().startswith("git_full ="):
mo = re.search(r'=\s*"(.*)"', line)
if mo:
keywords["full"] = mo.group(1)
f.close()
except EnvironmentError:
pass
return keywords
def git_versions_from_keywords(keywords, tag_prefix, verbose=False):
if not keywords:
return {} # keyword-finding function failed to find keywords
refnames = keywords["refnames"].strip()
if refnames.startswith("$Format"):
if verbose:
print("keywords are unexpanded, not using")
return {} # unexpanded, so not in an unpacked git-archive tarball
refs = set([r.strip() for r in refnames.strip("()").split(",")])
# starting in git-1.8.3, tags are listed as "tag: foo-1.0" instead of
# just "foo-1.0". If we see a "tag: " prefix, prefer those.
TAG = "tag: "
tags = set([r[len(TAG):] for r in refs if r.startswith(TAG)])
if not tags:
# Either we're using git < 1.8.3, or there really are no tags. We use
# a heuristic: assume all version tags have a digit. The old git %d
# expansion behaves like git log --decorate=short and strips out the
# refs/heads/ and refs/tags/ prefixes that would let us distinguish
# between branches and tags. By ignoring refnames without digits, we
# filter out many common branch names like "release" and
# "stabilization", as well as "HEAD" and "master".
tags = set([r for r in refs if re.search(r'\d', r)])
if verbose:
print("discarding '%s', no digits" % ",".join(refs-tags))
if verbose:
print("likely tags: %s" % ",".join(sorted(tags)))
for ref in sorted(tags):
# sorting will prefer e.g. "2.0" over "2.0rc1"
if ref.startswith(tag_prefix):
r = ref[len(tag_prefix):]
if verbose:
print("picking %s" % r)
return {"version": r,
"full": keywords["full"].strip()}
# no suitable tags, so version is "0+unknown", but full hex is still there
if verbose:
print("no suitable tags, using unknown + full revision id")
return {"version": "0+unknown",
"full": keywords["full"].strip()}
def git_parse_vcs_describe(git_describe, tag_prefix, verbose=False):
# TAG-NUM-gHEX[-dirty] or HEX[-dirty] . TAG might have hyphens.
# dirty
dirty = git_describe.endswith("-dirty")
if dirty:
git_describe = git_describe[:git_describe.rindex("-dirty")]
dirty_suffix = ".dirty" if dirty else ""
# now we have TAG-NUM-gHEX or HEX
if "-" not in git_describe: # just HEX
return "0+untagged.g"+git_describe+dirty_suffix, dirty
# just TAG-NUM-gHEX
mo = re.search(r'^(.+)-(\d+)-g([0-9a-f]+)$', git_describe)
if not mo:
# unparseable. Maybe git-describe is misbehaving?
return "0+unparseable"+dirty_suffix, dirty
# tag
full_tag = mo.group(1)
if not full_tag.startswith(tag_prefix):
if verbose:
fmt = "tag '%s' doesn't start with prefix '%s'"
print(fmt % (full_tag, tag_prefix))
return None, dirty
tag = full_tag[len(tag_prefix):]
# distance: number of commits since tag
distance = int(mo.group(2))
# commit: short hex revision ID
commit = mo.group(3)
# now build up version string, with post-release "local version
# identifier". Our goal: TAG[+NUM.gHEX[.dirty]] . Note that if you get a
# tagged build and then dirty it, you'll get TAG+0.gHEX.dirty . So you
# can always test version.endswith(".dirty").
version = tag
if distance or dirty:
version += "+%d.g%s" % (distance, commit) + dirty_suffix
return version, dirty
def git_versions_from_vcs(tag_prefix, root, verbose=False):
# this runs 'git' from the root of the source tree. This only gets called
# if the git-archive 'subst' keywords were *not* expanded, and
# _version.py hasn't already been rewritten with a short version string,
# meaning we're inside a checked out source tree.
if not os.path.exists(os.path.join(root, ".git")):
if verbose:
print("no .git in %s" % root)
return {} # get_versions() will try next method
GITS = ["git"]
if sys.platform == "win32":
GITS = ["git.cmd", "git.exe"]
# if there is a tag, this yields TAG-NUM-gHEX[-dirty]
# if there are no tags, this yields HEX[-dirty] (no NUM)
stdout = run_command(GITS, ["describe", "--tags", "--dirty",
"--always", "--long"],
cwd=root)
# --long was added in git-1.5.5
if stdout is None:
return {} # try next method
version, dirty = git_parse_vcs_describe(stdout, tag_prefix, verbose)
# build "full", which is FULLHEX[.dirty]
stdout = run_command(GITS, ["rev-parse", "HEAD"], cwd=root)
if stdout is None:
return {}
full = stdout.strip()
if dirty:
full += ".dirty"
return {"version": version, "full": full}
def get_versions(default={"version": "0+unknown", "full": ""}, verbose=False):
# I am in _version.py, which lives at ROOT/VERSIONFILE_SOURCE. If we have
# __file__, we can work backwards from there to the root. Some
# py2exe/bbfreeze/non-CPython implementations don't do __file__, in which
# case we can only use expanded keywords.
keywords = {"refnames": git_refnames, "full": git_full}
ver = git_versions_from_keywords(keywords, tag_prefix, verbose)
if ver:
return ver
try:
root = os.path.realpath(__file__)
# versionfile_source is the relative path from the top of the source
# tree (where the .git directory might live) to this file. Invert
# this to find the root from __file__.
for i in versionfile_source.split('/'):
root = os.path.dirname(root)
except NameError:
return default
return (git_versions_from_vcs(tag_prefix, root, verbose)
or versions_from_parentdir(parentdir_prefix, root, verbose)
or default)
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