
# 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 (build 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-0.10 (https://github.com/warner/python-versioneer)

# these strings will be replaced by git during git-archive
git_refnames = ""
git_full = "47a58a73e4e296dc4628cd9ab56833c99e6bcd52"


import subprocess
import sys
import errno


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 >= '3':
        stdout = stdout.decode()
    if p.returncode != 0:
        if verbose:
            print("unable to run %s (error)" % args[0])
        return None
    return stdout


import sys
import re
import os.path

def get_gits(root, verbose=False):
    if not os.path.exists(os.path.join(root, ".git")):
        if verbose:
            print("no .git in %s" % root)
        return None

    GITS = ["git"]
    if sys.platform == "win32":
        GITS = ["git.cmd", "git.exe"]
    return GITS


def get_expanded_variables(versionfile_abs):
    # the code embedded in _version.py can just fetch the value of these
    # variables. 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.
    variables = {}
    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:
                    variables["refnames"] = mo.group(1)
            if line.strip().startswith("git_full ="):
                mo = re.search(r'=\s*"(.*)"', line)
                if mo:
                    variables["full"] = mo.group(1)
        f.close()
    except EnvironmentError:
        pass
    return variables

def versions_from_expanded_variables(variables, tag_prefix, verbose=False):
    refnames = variables["refnames"].strip()
    if refnames.startswith("$Format"):
        if verbose:
            print("variables 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": variables["full"].strip() }
    # no suitable tags, so we use the full revision id
    if verbose:
        print("no suitable tags, using full revision id")
    return { "version": variables["full"].strip(),
             "full": variables["full"].strip() }

def versions_from_lookup(lookup, root, verbose=False):
    GITS = get_gits(root, verbose=verbose)
    if GITS is None:
        return {}

    stdout = run_command(GITS, ["rev-parse", "--abbrev-ref", "HEAD"],
                         cwd=root)
    if stdout is None:
        return {}

    current_branch = stdout.strip()
    for matcher, tag, ref_commit in lookup:
        if matcher.match(current_branch):
            if tag is None or ref_commit is None:
                return {}

            stdout = run_command(GITS, ["rev-list", "%s..HEAD" % ref_commit, "--count"], cwd=root)
            if stdout is None:
                return {}
            num_commits = stdout.strip()

            stdout =run_command(GITS, ["rev-parse", "--short", "HEAD"], cwd=root)
            if stdout is None:
                return {}
            short_hash = stdout.strip()

            stdout = run_command(GITS, ["describe", "--tags", "--dirty", "--always"], cwd=root)
            if stdout is None:
                return {}
            dirty = stdout.strip().endswith("-dirty")

            stdout = run_command(GITS, ["rev-parse", "HEAD"], cwd=root)
            if stdout is None:
                return {}
            full = stdout.strip()

            version = "%s-%s-g%s" % (tag, num_commits, short_hash)
            if dirty:
                version += "-dirty"
                full += "-dirty"
            return {"version": version, "full": full, "branch": current_branch}

    return {}

def 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' variables 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.

    GITS = get_gits(root, verbose=verbose)
    if GITS is None:
        return {}

    stdout = run_command(GITS, ["describe", "--tags", "--dirty", "--always"],
                         cwd=root)
    if stdout is None:
        return {}
    if not stdout.startswith(tag_prefix):
        if verbose:
            print("tag '%s' doesn't start with prefix '%s'" % (stdout, tag_prefix))
        return {}
    tag = stdout[len(tag_prefix):]
    stdout = run_command(GITS, ["rev-parse", "HEAD"], cwd=root)
    if stdout is None:
        return {}
    full = stdout.strip()
    if tag.endswith("-dirty"):
        full += "-dirty"

    stdout = run_command(GITS, ["rev-parse", "--abbrev-ref", "HEAD"],
                         cwd=root)
    if stdout is None:
        branch = None
    else:
        branch = stdout.strip()
    return {"version": tag, "full": full, "branch": branch}


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": "", "branch": ""}

tag_prefix = ""
parentdir_prefix = ""
versionfile_source = "src/octoprint/_version.py"
lookupfile = ".versioneer-lookup"

def parse_lookup_file(root, lookup_path=None):
    if not lookup_path:
        lookup_path = lookupfile
    if not lookup_path:
        return []

    path = os.path.join(root, lookup_path)
    if not os.path.exists(path):
        return []

    import re
    lookup = []
    with open(os.path.join(root, lookup_path), "r") as f:
        for line in f:
            if '#' in line:
                line = line[:line.rindex('#')]
            line = line.strip()
            try:
                split_line = line.split()
                if len(split_line) == 3:
                    pattern, tag, ref_commit = split_line
                    lookup.append([re.compile(pattern), tag, ref_commit])
                elif len(split_line) >= 1:
                    lookup.append([re.compile(split_line[0]), None, None])
            except:
                break
    return lookup

def get_versions(default={"version": "unknown", "full": "", "branch": "unknown"}, lookup_path=None, 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 variables.

    variables = { "refnames": git_refnames, "full": git_full }
    ver = versions_from_expanded_variables(variables, tag_prefix, verbose)
    if ver:
        return ver

    try:
        root = os.path.abspath(__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 range(len(versionfile_source.split("/"))):
            root = os.path.dirname(root)
    except NameError:
        return default

    lookup = parse_lookup_file(root, lookup_path=lookup_path)
    return (versions_from_lookup(lookup, root, verbose)
            or versions_from_vcs(tag_prefix, root, verbose)
            or versions_from_parentdir(parentdir_prefix, root, verbose)
            or default)

