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import dataclasses
from typing import Sequence, Optional, List, Literal, Iterable, Dict, Self
from debputy.manifest_parser.base_types import DebputyDispatchableType
from debputy.manifest_parser.util import AttributePath
STD_CONTROL_SCRIPTS = frozenset(
{
"preinst",
"prerm",
"postinst",
"postrm",
}
)
UDEB_CONTROL_SCRIPTS = frozenset(
{
"postinst",
"menutest",
"isinstallable",
}
)
ALL_CONTROL_SCRIPTS = STD_CONTROL_SCRIPTS | UDEB_CONTROL_SCRIPTS | {"config"}
@dataclasses.dataclass(slots=True, frozen=True)
class MaintscriptSnippet:
definition_source: str
snippet: str
snippet_order: Optional[Literal["service"]] = None
def script_content(self) -> str:
lines = [
f"# Snippet source: {self.definition_source}\n",
self.snippet,
]
if not self.snippet.endswith("\n"):
lines.append("\n")
return "".join(lines)
class MaintscriptSnippetContainer:
def __init__(self) -> None:
self._generic_snippets: List[MaintscriptSnippet] = []
self._snippets_by_order: Dict[Literal["service"], List[MaintscriptSnippet]] = {}
def copy(self) -> "MaintscriptSnippetContainer":
instance = self.__class__()
instance._generic_snippets = self._generic_snippets.copy()
instance._snippets_by_order = self._snippets_by_order.copy()
return instance
def append(self, maintscript_snippet: MaintscriptSnippet) -> None:
if maintscript_snippet.snippet_order is None:
self._generic_snippets.append(maintscript_snippet)
else:
if maintscript_snippet.snippet_order not in self._snippets_by_order:
self._snippets_by_order[maintscript_snippet.snippet_order] = []
self._snippets_by_order[maintscript_snippet.snippet_order].append(
maintscript_snippet
)
def has_content(self, snippet_order: Optional[Literal["service"]] = None) -> bool:
if snippet_order is None:
return bool(self._generic_snippets)
if snippet_order not in self._snippets_by_order:
return False
return bool(self._snippets_by_order[snippet_order])
def all_snippets(self) -> Iterable[MaintscriptSnippet]:
yield from self._generic_snippets
for snippets in self._snippets_by_order.values():
yield from snippets
def generate_snippet(
self,
tool_with_version: Optional[str] = None,
snippet_order: Optional[Literal["service"]] = None,
reverse: bool = False,
) -> Optional[str]:
inner_content = ""
if snippet_order is None:
snippets = (
reversed(self._generic_snippets) if reverse else self._generic_snippets
)
inner_content = "".join(s.script_content() for s in snippets)
elif snippet_order in self._snippets_by_order:
snippets = self._snippets_by_order[snippet_order]
if reverse:
snippets = reversed(snippets)
inner_content = "".join(s.script_content() for s in snippets)
if not inner_content:
return None
if tool_with_version:
return (
f"# Automatically added by {tool_with_version}\n"
+ inner_content
+ "# End automatically added section"
)
return inner_content
class DpkgMaintscriptHelperCommand(DebputyDispatchableType):
__slots__ = ("cmdline", "definition_source")
def __init__(self, cmdline: Sequence[str], definition_source: str):
self.cmdline = cmdline
self.definition_source = definition_source
@classmethod
def _finish_cmd(
cls,
definition_source: str,
cmdline: List[str],
prior_version: Optional[str],
owning_package: Optional[str],
) -> Self:
if prior_version is not None:
cmdline.append(prior_version)
if owning_package is not None:
if prior_version is None:
# Empty is allowed according to `man dpkg-maintscript-helper`
cmdline.append("")
cmdline.append(owning_package)
return cls(
tuple(cmdline),
definition_source,
)
@classmethod
def rm_conffile(
cls,
definition_source: AttributePath,
conffile: str,
prior_version: Optional[str] = None,
owning_package: Optional[str] = None,
) -> Self:
cmdline = ["rm_conffile", conffile]
return cls._finish_cmd(
definition_source.path, cmdline, prior_version, owning_package
)
@classmethod
def mv_conffile(
cls,
definition_source: AttributePath,
old_conffile: str,
new_confile: str,
prior_version: Optional[str] = None,
owning_package: Optional[str] = None,
) -> Self:
cmdline = ["mv_conffile", old_conffile, new_confile]
return cls._finish_cmd(
definition_source.path, cmdline, prior_version, owning_package
)
@classmethod
def symlink_to_dir(
cls,
definition_source: AttributePath,
pathname: str,
old_target: str,
prior_version: Optional[str] = None,
owning_package: Optional[str] = None,
) -> Self:
cmdline = ["symlink_to_dir", pathname, old_target]
return cls._finish_cmd(
definition_source.path, cmdline, prior_version, owning_package
)
@classmethod
def dir_to_symlink(
cls,
definition_source: AttributePath,
pathname: str,
new_target: str,
prior_version: Optional[str] = None,
owning_package: Optional[str] = None,
) -> Self:
cmdline = ["dir_to_symlink", pathname, new_target]
return cls._finish_cmd(
definition_source.path, cmdline, prior_version, owning_package
)
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