Test Dataclass in repo.base.blame()

1 files changed, 66 insertions, 37 deletions

diff --git a/git/repo/base.py b/git/repo/base.py
index b9399f62..bedd6a08 100644
--- a/git/repo/base.py
+++ b/git/repo/base.py
@@ -7,6 +7,7 @@ from __future__ import annotations
 import logging
 import os
 import re
+from dataclasses import dataclass
 import shlex
 import warnings
 from gitdb.db.loose import LooseObjectDB
@@ -41,7 +42,7 @@ import gitdb
 from git.types import TBD, PathLike, Lit_config_levels, Commit_ish, Tree_ish, assert_never
 from typing import (Any, BinaryIO, Callable, Dict,
                     Iterator, List, Mapping, Optional, Sequence,
-                    TextIO, Tuple, Type, Union,
+                    TextIO, Tuple, Type, TypedDict, Union,
                     NamedTuple, cast, TYPE_CHECKING)
 
 from git.types import ConfigLevels_Tup
@@ -53,7 +54,6 @@ if TYPE_CHECKING:
     from git.objects.submodule.base import UpdateProgress
     from git.remote import RemoteProgress
 
-
 # -----------------------------------------------------------
 
 log = logging.getLogger(__name__)
@@ -874,7 +874,7 @@ class Repo(object):
                              range(orig_lineno, orig_lineno + num_lines))
 
     def blame(self, rev: Union[str, HEAD], file: str, incremental: bool = False, **kwargs: Any
-              ) -> Union[List[List[Union[Optional['Commit'], List[str]]]], Optional[Iterator[BlameEntry]]]:
+              ) -> List[List[Commit | List[str | bytes] | None]] | Iterator[BlameEntry] | None:
         """The blame information for the given file at the given revision.
 
         :param rev: revision specifier, see git-rev-parse for viable options.
@@ -886,25 +886,52 @@ class Repo(object):
         if incremental:
             return self.blame_incremental(rev, file, **kwargs)
 
-        data = self.git.blame(rev, '--', file, p=True, stdout_as_string=False, **kwargs)
-        commits: Dict[str, TBD] = {}
-        blames: List[List[Union[Optional['Commit'], List[str]]]] = []
-
-        info: Dict[str, TBD] = {}  # use Any until TypedDict available
+        data: bytes = self.git.blame(rev, '--', file, p=True, stdout_as_string=False, **kwargs)
+        commits: Dict[str, Commit] = {}
+        blames: List[List[Commit | List[str | bytes] | None]] = []
+
+        class InfoTC(TypedDict, total=False):
+            sha: str
+            id: str
+            filename: str
+            summary: str
+            author: str
+            author_email: str
+            author_date: int
+            committer: str
+            committer_email: str
+            committer_date: int
+
+        @dataclass
+        class InfoDC(Dict[str, Union[str, int]]):
+            sha: str = ''
+            id: str = ''
+            filename: str = ''
+            summary: str = ''
+            author: str = ''
+            author_email: str = ''
+            author_date: int = 0
+            committer: str = ''
+            committer_email: str = ''
+            committer_date: int = 0
+
+        # info: InfoTD = {}
+        info = InfoDC()
 
         keepends = True
-        for line in data.splitlines(keepends):
+        for line_bytes in data.splitlines(keepends):
             try:
-                line = line.rstrip().decode(defenc)
+                line_str = line_bytes.rstrip().decode(defenc)
             except UnicodeDecodeError:
                 firstpart = ''
+                parts = ['']
                 is_binary = True
             else:
                 # As we don't have an idea when the binary data ends, as it could contain multiple newlines
                 # in the process. So we rely on being able to decode to tell us what is is.
                 # This can absolutely fail even on text files, but even if it does, we should be fine treating it
                 # as binary instead
-                parts = self.re_whitespace.split(line, 1)
+                parts = self.re_whitespace.split(line_str, 1)
                 firstpart = parts[0]
                 is_binary = False
             # end handle decode of line
@@ -916,10 +943,10 @@ class Repo(object):
                 # another line of blame with the same data
                 digits = parts[-1].split(" ")
                 if len(digits) == 3:
-                    info = {'id': firstpart}
+                    info.id = firstpart
                     blames.append([None, []])
-                elif info['id'] != firstpart:
-                    info = {'id': firstpart}
+                elif info.id != firstpart:
+                    info.id = firstpart
                     blames.append([commits.get(firstpart), []])
                 # END blame data initialization
             else:
@@ -936,9 +963,9 @@ class Repo(object):
                     # committer-tz -0700  - IGNORED BY US
                     role = m.group(0)
                     if firstpart.endswith('-mail'):
-                        info["%s_email" % role] = parts[-1]
+                        info[f"{role}_email"] = parts[-1]
                     elif firstpart.endswith('-time'):
-                        info["%s_date" % role] = int(parts[-1])
+                        info[f"{role}_date"] = int(parts[-1])
                     elif role == firstpart:
                         info[role] = parts[-1]
                     # END distinguish mail,time,name
@@ -953,38 +980,40 @@ class Repo(object):
                         info['summary'] = parts[-1]
                     elif firstpart == '':
                         if info:
-                            sha = info['id']
+                            sha = info.id
                             c = commits.get(sha)
                             if c is None:
                                 c = Commit(self, hex_to_bin(sha),
-                                           author=Actor._from_string(info['author'] + ' ' + info['author_email']),
-                                           authored_date=info['author_date'],
+                                           author=Actor._from_string(info.author + ' ' + info.author_email),
+                                           authored_date=info.author_date,
                                            committer=Actor._from_string(
-                                               info['committer'] + ' ' + info['committer_email']),
-                                           committed_date=info['committer_date'])
+                                    info.committer + ' ' + info.committer_email),
+                                    committed_date=info.committer_date)
                                 commits[sha] = c
+                                blames[-1][0] = c
                             # END if commit objects needs initial creation
-                            if not is_binary:
-                                if line and line[0] == '\t':
-                                    line = line[1:]
-                            else:
-                                # NOTE: We are actually parsing lines out of binary data, which can lead to the
-                                # binary being split up along the newline separator. We will append this to the blame
-                                # we are currently looking at, even though it should be concatenated with the last line
-                                # we have seen.
-                                pass
-                            # end handle line contents
-                            blames[-1][0] = c
                             if blames[-1][1] is not None:
-                                blames[-1][1].append(line)
-                            info = {'id': sha}
+                                if not is_binary:
+                                    if line_str and line_str[0] == '\t':
+                                        line_str = line_str[1:]
+
+                                    blames[-1][1].append(line_str)
+                                else:
+                                    # NOTE: We are actually parsing lines out of binary data, which can lead to the
+                                    # binary being split up along the newline separator. We will append this to the
+                                    # blame we are currently looking at, even though it should be concatenated with
+                                    # the last line we have seen.
+                                    blames[-1][1].append(line_bytes)
+                            # end handle line contents
+
+                            info.id = sha
                         # END if we collected commit info
                     # END distinguish filename,summary,rest
                 # END distinguish author|committer vs filename,summary,rest
             # END distinguish hexsha vs other information
         return blames
 
-    @classmethod
+    @ classmethod
     def init(cls, path: Union[PathLike, None] = None, mkdir: bool = True, odbt: Type[GitCmdObjectDB] = GitCmdObjectDB,
              expand_vars: bool = True, **kwargs: Any) -> 'Repo':
         """Initialize a git repository at the given path if specified
@@ -1023,7 +1052,7 @@ class Repo(object):
         git.init(**kwargs)
         return cls(path, odbt=odbt)
 
-    @classmethod
+    @ classmethod
     def _clone(cls, git: 'Git', url: PathLike, path: PathLike, odb_default_type: Type[GitCmdObjectDB],
                progress: Union['RemoteProgress', 'UpdateProgress', Callable[..., 'RemoteProgress'], None] = None,
                multi_options: Optional[List[str]] = None, **kwargs: Any
@@ -1101,7 +1130,7 @@ class Repo(object):
         :return: ``git.Repo`` (the newly cloned repo)"""
         return self._clone(self.git, self.common_dir, path, type(self.odb), progress, multi_options, **kwargs)
 
-    @classmethod
+    @ classmethod
     def clone_from(cls, url: PathLike, to_path: PathLike, progress: Optional[Callable] = None,
                    env: Optional[Mapping[str, Any]] = None,
                    multi_options: Optional[List[str]] = None, **kwargs: Any) -> 'Repo':