"""DistUtilsExtra.auto

This provides a setup() method for setuptools and DistUtilsExtra which infers as
many setup() arguments as possible. The idea is that your setup.py only needs
to have the metadata and some tweaks for unusual files/paths, in a "convention
over configuration" paradigm.

This currently supports:

 * Python modules (./*.py, only in root directory)
 * Python packages (all directories with __init__.py)
 * Docbook-XML GNOME help files (help/<language>/{*.xml,*.omf,figures})
 * GtkBuilder and Qt4 user interfaces (*.ui) [installed into
   prefix/share/<projectname>/]
 * D-Bus (*.conf and *.service)
 * GSettings schemas (*.gschema.xml)
 * polkit (*.policy.in)
 * Desktop files (*.desktop.in) [into prefix/share/applications, or
   prefix/share/autostart if they have "autostart" anywhere in the path]
 * KDE4 notifications (*.notifyrc.in)
 * Apport hooks (apport/*) [installed into /usr/share/apport/package-hooks]
 * scripts (all in bin/, and ./<projectname>
 * Auxiliary data files (in data/*) [into prefix/share/<projectname>/]
 * automatic po/POTFILES.in (with all source files which contain _())
 * automatic MANIFEST (everything except swap and backup files, *.pyc, and
   revision control)
 * manpages (*.[0-9])
 * icons (data/icons/<size>/<category>/*.{svg,png})
 * files which should go into /etc (./etc/*, copied verbatim)
 * determining "requires" from import statements in source code
 * determining "provides" from shipped packages and modules

If you follow above conventions, then you don't need any po/POTFILES.in,
./setup.cfg, or ./MANIFEST.in, and just need the project metadata (name,
author, license, etc.) in ./setup.py.
"""

# (c) 2009 Canonical Ltd.
# Author: Martin Pitt <martin.pitt@ubuntu.com>

# TODO: Address following pylint complaints
# pylint: disable=attribute-defined-outside-init,consider-using-with,eval-used
# pylint: disable=global-variable-not-assigned,invalid-name,missing-docstring
# pylint: disable=redefined-outer-name,too-many-branches,unspecified-encoding

import ast
import fnmatch
import locale
import logging
import os
import pathlib
import shutil
import stat
import sys
import typing
from functools import reduce

import setuptools
import setuptools.command.install
import setuptools.command.sdist
from setuptools import Command, Distribution
from setuptools.errors import FileError

from DistUtilsExtra import __version__ as __pkgversion
from DistUtilsExtra.command import (
    build_extra,
    build_help,
    build_i18n,
    build_icons,
    pylint,
)

__version__ = __pkgversion

# FIXME: global variable, to share with build_i18n_auto
# pylint: disable=global-statement
src = {}
src_all = {}


def setup(**attrs):
    """Auto-inferring extension of standard setuptools.setup()"""
    global src
    global src_all
    src_all = src_find(attrs)
    src = src_all.copy()

    # src_find() removes explicit scripts, but we need them for automatic
    # POTFILE.in building and requires
    src_all.update(set(attrs.get("scripts", [])))

    src_mark(src, "setup.py")
    src_markglob(src, "setup.cfg")

    # mark files in etc/*, handled by install_auto
    # don't install DistUtilsExtra if bundled with a source tarball
    # ignore packaging
    ignore_dirs = ["etc", "DistUtilsExtra", "debian"]

    def should_be_ignored(path: str) -> bool:
        for ignore_dir in ignore_dirs:
            if path.startswith(ignore_dir + os.path.sep):
                return True
        # Also remove files from the .egg-info directory
        return ".egg-info/" in path

    src = {f for f in src if not should_be_ignored(f)}

    __cmdclass(attrs)
    __modules(attrs, src)
    __packages(attrs, src)
    __provides(attrs, src)
    __dbus(attrs, src)
    __gschema(attrs, src)
    __apport_hooks(attrs, src)
    __data(attrs, src)
    __scripts(attrs, src)
    __stdfiles(attrs, src)
    __ui(attrs, src)
    __manpages(attrs, src)

    if "clean" not in sys.argv:
        __requires(attrs, src_all)

    setuptools.setup(**attrs)

    if src:
        print("WARNING: the following files are not recognized by DistUtilsExtra.auto:")
        enc = locale.getpreferredencoding()
        for f in sorted(src):
            # ensure that we can always print the file name
            f_loc = f.encode(enc, errors="replace").decode(enc, errors="replace")
            print(f"  {f_loc}")


#
# parts of setup()
#


def _log_error(unused_function: typing.Any, path: str, excinfo: typing.Tuple) -> None:
    logger = logging.getLogger(__name__)
    logger.warning("error removing %s: %s", path, excinfo[1])


class clean_build_tree(Command):
    description = "clean up build/ directory"
    user_options = [
        ("build-base=", "b", "base build directory (default: 'build.build-base')"),
        (
            "build-lib=",
            None,
            "build directory for all modules (default: 'build.build-lib')",
        ),
        ("all", "a", "remove all build output, not just temporary by-products"),
    ]
    boolean_options = ["all"]

    def __init__(self, dist: Distribution, **kwargs: dict[str, typing.Any]) -> None:
        super().__init__(dist, **kwargs)
        self.initialize_options()

    def initialize_options(self) -> None:
        self.all = False
        self.build_base: typing.Optional[str] = None

    def finalize_options(self) -> None:
        self.set_undefined_options("build", ("build_base", "build_base"))

    def run(self) -> None:
        assert self.build_base
        # clean build/mo
        if os.path.exists(self.build_base):
            logging.getLogger(__name__).info("removing '%s'", self.build_base)
            shutil.rmtree(self.build_base, onerror=_log_error)


def __cmdclass(attrs):
    """Default cmdclass for DistUtilsExtra"""

    v = attrs.setdefault("cmdclass", {})
    v.setdefault("build", build_extra.build_extra)
    v.setdefault("build_help", build_help_auto)
    v.setdefault("build_i18n", build_i18n_auto)
    v.setdefault("build_icons", build_icons.build_icons)
    v.setdefault("install", install_auto)
    v.setdefault("clean", clean_build_tree)
    v.setdefault("sdist", sdist_auto)
    v.setdefault("pylint", pylint.pylint)


def __modules(attrs, src):
    """Default modules"""

    if "py_modules" in attrs:
        for mod in attrs["py_modules"]:
            print(mod)
            src_markglob(src, os.path.join(mod, "*.py"))
        return

    mods = attrs.setdefault("py_modules", [])

    for f in src_fileglob(src, "*.py"):
        if os.path.sep not in f:
            mods.append(os.path.splitext(f)[0])
            src_markglob(src, f)


def __packages(attrs, src):
    """Default packages"""

    if "packages" in attrs:
        for pkg in attrs["packages"]:
            src_markglob(src, os.path.join(pkg, "*.py"))
        return

    packages = attrs.setdefault("packages", [])

    for f in src_fileglob(src, "__init__.py"):
        if f.startswith(f"data{os.path.sep}"):
            continue
        pkg = os.path.dirname(f)
        packages.append(pkg)
        src_markglob(src, os.path.join(pkg, "*.py"))


def __dbus(attrs, src):
    """D-Bus configuration and services"""

    v = attrs.setdefault("data_files", [])

    # /etc/dbus-1/system.d/*.conf
    dbus_conf = []
    for f in src_fileglob(src, "*.conf"):
        if "-//freedesktop//DTD D-BUS Bus Configuration" in open(f).read():
            src_mark(src, f)
            dbus_conf.append(f)
    if dbus_conf:
        v.append(("/etc/dbus-1/system.d/", dbus_conf))

    session_service = []
    system_service = []
    # dbus services
    for f in src_fileglob(src, "*.service"):
        lines = [line.strip() for line in open(f).readlines()]
        if "[D-BUS Service]" not in lines:
            continue
        for line in lines:
            if line.startswith("User="):
                src_mark(src, f)
                system_service.append(f)
                break
        else:
            src_mark(src, f)
            session_service.append(f)
    if system_service:
        v.append(("share/dbus-1/system-services", system_service))
    if session_service:
        v.append(("share/dbus-1/services", session_service))


def __gschema(attrs, src):
    """Install GSettings schema files"""

    v = attrs.setdefault("data_files", [])
    schema_glob = "*.gschema.xml"
    schemas = src_fileglob(src, schema_glob)
    if schemas:
        src_markglob(src, schema_glob)
        src_markglob(src, "*gschemas.compiled")
        v.append(("share/glib-2.0/schemas/", schemas))


def __apport_hooks(attrs, src):
    """Apport hooks"""
    v = attrs.setdefault("data_files", [])

    # files will be copied to /usr/share/apport/package-hooks/
    hooks = []
    assert "name" in attrs, 'You need to set the "name" property in setup.py'
    for f in src_fileglob(src, "*.py"):
        if f.startswith("apport/"):
            hooks.append(f)
            src_mark(src, f)
    if hooks:
        v.append(("share/apport/package-hooks/", hooks))


def __data(attrs, src):
    """Install auxiliary data files.

    This installs everything from data/ except data/icons/ and *.in files (which
    are handled differently) into prefix/share/<projectname>/.
    """
    v = attrs.setdefault("data_files", [])

    assert "name" in attrs, 'You need to set the "name" property in setup.py'

    for f in src.copy():
        if (
            f.startswith("data/")
            and not f.startswith("data/icons/")
            and not f.endswith(".desktop.in")
            and not f.endswith(".notifyrc.in")
        ):
            if not os.path.islink(f):
                # symlinks are handled in install_auto
                v.append(
                    (os.path.join("share", attrs["name"], os.path.dirname(f[5:])), [f])
                )
            src_mark(src, f)


def __scripts(attrs, src):
    """Install scripts.

    This picks executable scripts in bin/*, and an executable ./<projectname>.
    Other scripts have to be added manually; this is to avoid automatically
    installing test suites, build scripts, etc.
    """
    assert "name" in attrs, 'You need to set the "name" property in setup.py'

    scripts = []
    for f in src.copy():
        if f.startswith("bin/") or f == attrs["name"]:
            st = os.lstat(f)
            if stat.S_ISREG(st.st_mode) and st.st_mode & stat.S_IEXEC:
                scripts.append(f)
                src_mark(src, f)
            elif stat.S_ISLNK(st.st_mode):
                # symlinks are handled in install_auto
                src_mark(src, f)

    if scripts:
        v = attrs.setdefault("scripts", [])
        v += scripts


def __stdfiles(attrs, src):
    """Install/mark standard files.

    This covers COPYING, AUTHORS, README, etc.
    """
    src_markglob(src, "COPYING*")
    src_markglob(src, "LICENSE*")
    src_markglob(src, "AUTHORS")
    src_markglob(src, "MANIFEST.in")
    src_markglob(src, "MANIFEST")
    src_markglob(src, "TODO")

    # install all README* from the root directory
    readme = []
    for f in src_fileglob(src, "README*").union(src_fileglob(src, "NEWS")):
        if os.path.sep not in f:
            readme.append(f)
            src_mark(src, f)
    if readme:
        assert "name" in attrs, 'You need to set the "name" property in setup.py'

        attrs.setdefault("data_files", []).append(
            (os.path.join("share", "doc", attrs["name"]), readme)
        )


def __ui(attrs, src):
    """Install GtkBuilder/Qt *.ui files"""

    ui = []
    for f in src_fileglob(src, "*.ui"):
        fd = open(f, "rb")
        firstlines = fd.readline()
        firstlines += b"\n" + fd.readline()
        firstlines += b"\n" + fd.readline()
        fd.close()
        if b"<interface" in firstlines or b"<ui version=" in firstlines:
            src_mark(src, f)
            ui.append(f)
    if ui:
        assert "name" in attrs, 'You need to set the "name" property in setup.py'

        attrs.setdefault("data_files", []).append(
            (os.path.join("share", attrs["name"]), ui)
        )


def __manpages(attrs, src):
    """Install manpages"""

    mans = {}
    for f in src_fileglob(src, "*.[0123456789]"):
        with open(f) as fd:
            for line in fd:
                if line.startswith('."'):
                    continue
                if line.startswith(".TH "):
                    src_mark(src, f)
                    mans.setdefault(f[-1], []).append(f)
                break

    v = attrs.setdefault("data_files", [])
    for section, files in mans.items():
        v.append((os.path.join("share", "man", f"man{section}"), files))


# pylint: disable-next=too-many-return-statements
def __external_mod(cur_module, module, attrs):
    """Check if given Python module is not included in Python or locally"""

    # filter out locally provided modules early, to avoid importing them (which
    # might raise an exception, or parse argv, etc.)
    if module in attrs["provides"]:
        return False
    for m in _module_parents(module):
        if m in attrs["provides"]:
            return False

    try:
        mod = __import__(module)
    except ImportError:
        # try relative import
        try:
            if cur_module:
                mod = __import__(f"{cur_module}.{module}")
            else:
                raise
        except ImportError:
            sys.stderr.write(f"ERROR: Python module {module} not found\n")
            return False
        except (RuntimeError, ValueError):
            # RuntimeError: When Gdk can't be initialized
            # ValueError: weird ctypes case with wintypes
            return False
    except (RuntimeError, ValueError):
        # RuntimeError: When Gdk can't be initialized
        # ValueError: weird ctypes case with wintypes
        return False

    if not hasattr(mod, "__file__") or not mod.__file__:
        # builtin module
        return False

    # filter out locally provided modules
    if mod.__name__ in attrs["provides"]:
        return False

    return (
        "dist-packages" in mod.__file__
        or "site-packages" in mod.__file__
        or not mod.__file__.startswith(os.path.dirname(os.__file__))
    )


def __add_imports(imports, file, attrs):
    """Add all imported modules from file to imports set.

    This filters out modules which are shipped with Python itself.
    """
    if os.path.exists(os.path.join(os.path.dirname(file), "__init__.py")):
        cur_module = ".".join(file.split(os.path.sep)[:-1])
    else:
        # this might happen for paths like bin/<script> which we do not want to
        # treat as module for checking relative imports
        cur_module = None

    try:
        with open(file, "rb") as f:
            file_content = f.read().decode("UTF-8")
            tree = ast.parse(file_content, file)

        for node in ast.walk(tree):
            if isinstance(node, ast.Import):
                for alias in node.names:
                    if alias.name and __external_mod(cur_module, alias.name, attrs):
                        imports.add(alias.name)
            if isinstance(node, ast.ImportFrom):
                if node.module == "gi.repository":
                    for name in node.names:
                        imports.add(f"gi.repository.{name.name}")

                elif node.module and __external_mod(cur_module, node.module, attrs):
                    imports.add(node.module)
    except SyntaxError as e:
        sys.stderr.write(f"WARNING: syntax errors in {file}: {str(e)}\n")


def _module_parents(mod):
    """Iterate over all parents of a module"""

    hierarchy = mod.split(".")
    hierarchy.pop()
    while hierarchy:
        yield ".".join(hierarchy)
        hierarchy.pop()


def __filter_namespace(modules):
    """Filter out modules which are already covered by a parent module

    E. g. this transforms ['os.path', 'os', 'foo.bar.baz', 'foo.bar'] to
    ['os', 'foo.bar'].
    """
    result = set()

    for m in modules:
        if m.startswith("gi.repository."):
            result.add(m)
            continue
        for p in _module_parents(m):
            if p in modules:
                break
        else:
            result.add(m)

    return sorted(result)


def __requires(attrs, src_all):
    """Determine requires (if not set explicitly)"""

    if "requires" in attrs:
        return

    imports = set()

    # iterate over all *.py and scripts which are Python
    for s in src_all:
        if s == "setup.py":
            continue
        if s.startswith(f"data{os.path.sep}"):
            continue
        ext = os.path.splitext(s)[1]
        if ext == "":
            try:
                with open(s) as f:
                    line = f.readline()
            except (UnicodeDecodeError, IOError):
                continue
            if not line.startswith("#!") or "python" not in line:
                continue
        elif ext != ".py":
            continue
        __add_imports(imports, s, attrs)

    attrs["requires"] = __filter_namespace(imports)


def __provides(attrs, unused_src_all):
    """Determine provides (if not set explicitly)"""

    if "provides" in attrs:
        return

    provides = list(attrs.get("py_modules", []))  # we need a copy here
    for p in attrs.get("packages", []):
        provides.append(p.replace(os.path.sep, "."))
    attrs["provides"] = __filter_namespace(provides)


#
# helper functions
#


def src_find(attrs):
    """Find source files.

    This ignores all source files which are explicitly specified as setup()
    arguments.
    """
    src = set()

    # files explicitly covered in setup() call
    explicit = set(attrs.get("scripts", []))
    for _, files in attrs.get("data_files", []):
        explicit.update(files)

    for root, _, files in os.walk("."):
        if root.startswith("./"):
            root = root[2:]
        if root == ".":
            root = ""
        if root.startswith(".") or root.split(os.path.sep, 1)[0] in (
            "build",
            "test",
            "tests",
        ):
            continue
        # data/icons is handled by build_icons
        if root.startswith(os.path.join("data", "icons")):
            continue
        for f in files:
            ext = os.path.splitext(f)[1]
            if f.startswith(".") or ext in (".pyc", "~", ".mo"):
                continue
            # po/*.po is taken care of by build_i18n
            if root == "po" and (ext == ".po" or f == "POTFILES.in"):
                continue

            path = os.path.join(root, f)
            if path not in explicit:
                src.add(path)

    return src


def src_fileglob(src, fnameglob):
    """Return set of files which match fnameglob."""

    result = set()
    for f in src:
        if fnmatch.fnmatch(os.path.basename(f), fnameglob):
            result.add(f)
    return result


def src_mark(src, path):
    """Remove path from src."""

    src.remove(path)


def src_markglob(src, pathglob):
    """Remove all paths from src which match pathglob."""

    for f in src.copy():
        if fnmatch.fnmatch(f, pathglob):
            src.remove(f)


#
# Automatic setup.cfg
#


class build_help_auto(build_help.build_help):
    def finalize_options(self):
        super().finalize_options()
        global src

        for data_set in self.get_data_files():
            for filepath in data_set[1]:
                src.remove(filepath)


class build_i18n_auto(build_i18n.build_i18n):
    def finalize_options(self):
        super().finalize_options()
        global src
        global src_all

        # add polkit files
        policy_files = []
        for f in src_fileglob(src, "*.policy.in"):
            src_mark(src, f)
            policy_files.append(f)
        if policy_files:
            try:
                xf = eval(self.xml_files)
            except TypeError:
                xf = []
            xf.append((os.path.join("share", "polkit-1", "actions"), policy_files))
            self.xml_files = repr(xf)

        # add desktop files
        desktop_files = []
        autostart_files = []
        notify_files = []
        for f in src_fileglob(src, "*.desktop.in"):
            src_mark(src, f)
            if "autostart" in f:
                autostart_files.append(f)
            else:
                desktop_files.append(f)
        for f in src_fileglob(src, "*.notifyrc.in"):
            src_mark(src, f)
            notify_files.append(f)
        try:
            df = eval(self.desktop_files)
        except TypeError:
            df = []
        if desktop_files:
            df.append(("share/applications", desktop_files))
        if autostart_files:
            df.append(("share/autostart", autostart_files))
        if notify_files:
            df.append((f"share/kde4/apps/{self.distribution.get_name()}", notify_files))
        self.desktop_files = repr(df)

        # mark PO template as known to handle
        try:
            src_mark(
                src, os.path.join(self.po_dir, f"{self.distribution.get_name()}.pot")
            )
        except KeyError:
            pass

    def run(self):
        """Build a default POTFILES.in"""

        auto_potfiles_in = False
        exe_symlinks = []
        global src_all
        try:
            if not os.path.exists(os.path.join("po", "POTFILES.in")):
                prefix = {}
                files = src_fileglob(src_all, "*.py")
                files.update(src_fileglob(src_all, "*.desktop.in"))
                files.update(src_fileglob(src_all, "*.notifyrc.in"))
                files.update(src_fileglob(src_all, "*.policy.in"))

                for f in src_fileglob(src_all, "*.ui"):
                    contents = open(f, "rb").read()
                    if (
                        b"<interface>\n" in contents or b"<interface " in contents
                    ) and b'class="Gtk' in contents:
                        prefix[f] = "[type: gettext/glade]"
                        files.add(f)

                # find extensionless executable scripts which are Python files, and
                # generate a temporary *.py alias, so that they get caught by
                # intltool
                for f in reduce(
                    lambda x, y: x.union(y[1]), self.distribution.data_files, src_all
                ):
                    f_py = f"{f}.py"
                    if (
                        os.access(f, os.X_OK)
                        and os.path.splitext(f)[1] == ""
                        and not os.path.exists(f_py)
                    ):
                        line = open(f, "rb").readline()
                        if line.startswith(b"#!") and b"python" in line:
                            os.symlink(os.path.basename(f), f_py)
                            files.add(f_py)
                            exe_symlinks.append(f_py)

                if files:
                    if not os.path.isdir("po"):
                        os.mkdir("po")
                    potfiles_in = open("po/POTFILES.in", "w")
                    potfiles_in.write("[encoding: UTF-8]\n")
                    for f in sorted(files):
                        potfiles_in.write(f"{prefix.get(f, '') + f}\n")
                    potfiles_in.close()

                    auto_potfiles_in = True

            super().run()
        finally:
            for f in exe_symlinks:
                os.unlink(f)

        if auto_potfiles_in:
            os.unlink("po/POTFILES.in")
            try:
                os.rmdir("po")
            except OSError:
                pass


#
# Automatic sdist
#


class sdist_auto(setuptools.command.sdist.sdist):
    """Default values for the 'sdist' command.

    Replace the manually maintained MANIFEST.in file by providing information
    about what the source tarball created using the 'sdist' command should
    contain in normal cases.

    It prevents the 'build' directory, version control related files, as well as
    compiled Python and gettext files and temporary files from being included in
    the source tarball.

    It's possible for subclasses to extend the 'filter_prefix' and
    'filter_suffix' properties.
    """

    filter_prefix = ["build", ".git", ".svn", ".CVS", ".bzr", ".shelf"]
    filter_suffix = [".pyc", ".mo", "~", ".swp"]

    def __init__(self, dist: Distribution, **kwargs: dict[str, typing.Any]) -> None:
        super().__init__(dist, **kwargs)
        self.distribution = dist
        self.sub_commands.append(("add_extra", sdist_auto.add_extra))

    def add_extra(self) -> None:
        if os.path.exists("MANIFEST.in"):
            return

        self.filter_prefix.append(os.path.join("dist", self.distribution.get_name()))

        for path in pathlib.Path(".").rglob("*"):
            f = str(path)
            if (
                path.is_dir()
                or f in self.filelist.files
                or any(map(f.startswith, self.filter_prefix))
                or any(map(f.endswith, self.filter_suffix))
            ):
                continue

            self.filelist.append(f)


#
# Automatic installation of ./etc/ and symlinks
#


def copy_tree(src: pathlib.Path, dst: pathlib.Path) -> None:
    """Copy an entire directory tree 'src' to a new location 'dst'.

    Both 'src' and 'dst' must be directory names.  If 'src' is not a
    directory, raise FileError.  If 'dst' does not exist, it is
    created.  The end result of the copy is that every file in 'src'
    is copied to 'dst', and directories under 'src' are recursively
    copied to 'dst'.
    """
    log = logging.getLogger(__name__)

    if not src.is_dir():
        raise FileError(f"cannot copy tree '{src}': not a directory")

    if not dst.exists():
        log.info("creating %s", dst)
        dst.mkdir(parents=True, exist_ok=True)

    for src_path in sorted(src.iterdir()):
        dst_path = dst / src_path.name

        if src_path.is_dir():
            copy_tree(src_path, dst_path)

        elif src_path.is_symlink():
            link_dest = src_path.readlink()
            log.info("linking %s -> %s", dst_path, link_dest)
            try:
                dst_path.unlink(missing_ok=True)
            except OSError as error:
                raise FileError(f"could not delete '{dst_path}': {error}") from error
            dst_path.symlink_to(link_dest)

        else:
            log.info("copying %s -> %s", src_path, dst_path)
            try:
                dst_path.unlink(missing_ok=True)
            except OSError as error:
                raise FileError(f"could not delete '{dst_path}': {error}") from error
            shutil.copy(src_path, dst_path)


class install_auto(setuptools.command.install.install):
    def run(self):
        # run build_* subcommands to get file lists if install command
        # won't run 'build' for us
        if self.skip_build:
            self.run_command("build_help")
            self.run_command("build_i18n")
            self.run_command("build_icons")
        self._install_files_from_etc()
        self._install_data_and_scripts_symlinks()
        super().run()

    def _install_files_from_etc(self) -> None:
        if os.path.isdir("etc"):
            # work around a bug in copy_tree() which fails with "File exists" on
            # previously existing symlinks
            for path in pathlib.Path("etc").rglob("*"):
                if path.is_dir():
                    continue
                f = str(path)
                if not f.startswith(f"etc{os.path.sep}") or not os.path.islink(f):
                    continue
                try:
                    os.unlink(os.path.join(self.root, f))
                except OSError:
                    pass
            if not self.root:
                self.root = ""
            copy_tree(pathlib.Path("etc"), pathlib.Path(os.path.join(self.root, "etc")))

    def _install_data_and_scripts_symlinks(self) -> None:
        for path, _, files in os.walk("."):
            for f in files:
                f = os.path.join(path, f)
                if not os.path.islink(f):
                    continue

                if f.startswith("./bin/") or f.startswith("./data/"):
                    if f.startswith("./bin"):
                        target_dir = self.install_scripts
                        dest = os.path.join(
                            target_dir, os.path.sep.join(f.split(os.path.sep)[2:])
                        )
                    elif f.startswith("./data/icons"):
                        target_dir = os.path.join(
                            self.install_data, "share", "icons", "hicolor"
                        )
                        dest = os.path.join(
                            target_dir, os.path.sep.join(f.split(os.path.sep)[3:])
                        )
                    else:
                        target_dir = os.path.join(
                            self.install_data, "share", self.distribution.get_name()
                        )
                        dest = os.path.join(
                            target_dir, os.path.sep.join(f.split(os.path.sep)[2:])
                        )

                    d = os.path.dirname(dest)
                    if not os.path.isdir(d):
                        os.makedirs(d)
                    pathlib.Path(dest).unlink(missing_ok=True)
                    os.symlink(os.readlink(f), dest)