From a8303cae457db92555fb64b564e0edcdb66dc600 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maximilian=20Ke=C3=9Fler?= <git@maximilian-kessler.de>
Date: Sun, 6 Feb 2022 21:27:19 +0100
Subject: [PATCH] add git management file

---
 PyTeX/build/versioning/git/recent.py | 48 ++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 PyTeX/build/versioning/git/recent.py

diff --git a/PyTeX/build/versioning/git/recent.py b/PyTeX/build/versioning/git/recent.py
new file mode 100644
index 0000000..637dee3
--- /dev/null
+++ b/PyTeX/build/versioning/git/recent.py
@@ -0,0 +1,48 @@
+import git
+from typing import Union, Optional, List
+from pathlib import Path
+
+
+def get_latest_commit(repo):
+    if repo.head.is_detached:
+        return repo.head.commit
+    else:
+        return repo.head.ref.commit
+
+
+def is_recent(file: Path, repo: git.Repo, compare: Optional[Union[git.Commit, List[git.Commit]]] = None) -> Optional[
+        bool]:
+    """
+    :param file: file to check
+    :param repo: repo that the file belongs to
+    :param compare: commit or list of commits to compare to. None stands for 'working tree'
+    :return: Whether the given file is currently the same as in compared commit
+
+    If compare is a commit, checks if the file has changed since given commit, compared to the most recent commit
+    of the repository
+    For a list of commits, checks the same, but for all of these commits. In particular, only returns true if the file
+    is the same in all of the specified commits (and in the most recent of the repository)
+
+    If compare is None, compares the file against the corking tree, i.e. if the file has been modified since the last
+    commit on the repo. This also involves staged files, i.e. modified and staged files will be considered as
+    'not recent' since changes are not committed
+    """
+    newly_committed_files = []
+    if type(compare) == git.Commit:
+        newly_committed_files = [item.a_path for item in get_latest_commit(repo).diff(compare)]
+    elif compare is None:
+        com = get_latest_commit(repo)
+        newly_committed_files = [item.a_path for item in com.diff(None)]
+        pass
+    elif type(compare) == list:
+        for commit in compare:
+            for item in get_latest_commit(repo).diff(commit):
+                newly_committed_files.append(item.a_path)
+    else:
+        print("Invalid argument type for compare")
+        return None
+
+    if str(file.relative_to(repo.working_dir)) in newly_committed_files:
+        return False
+    else:
+        return True