Added dict parameter to repo.get_commits() to define what shall be pulled.

In a large repository, get_commits() will run into too many recursions.
I added the possibility to define sha, page, limit (all from the API documentation)
and the additional non-API parameter pages, which defines how many pages of commits
shall be requested. The default for pages is -1, which will request pages indefinitely.

I also added the commit message property the the Commit class/object.
I also added the commit_date property that is read from the commiter structure
below the commit structure because that date represents the actual commit time.
In our case, the Commit.created property contains bogus values because we're importing from SVN.

gitea/gitea.py

@@ -324,11 +324,18 @@ class Repository(GiteaApiObject):
         """Get all Issues of this Repository (open and closed)"""
         return self.get_issues_state(Issue.OPENED) + self.get_issues_state(Issue.CLOSED)
 
-    def get_commits(self) -> List["Commit"]:
-        """Get all the Commits of this Repository."""
+    def get_commits(self, params=None) -> List["Commit"]:
+        """
+        Get all the Commits of this Repository.
+        Use params dict to define pages, page, sha, limit.
+        """
+        params = params or {}
+        page = 1 if not 'page' in params else params['page']
         try:
             results = self.gitea.requests_get_commits(
-                Repository.REPO_COMMITS % (self.owner.username, self.name)
+                endpoint = Repository.REPO_COMMITS % (self.owner.username, self.name),
+                params = params,
+                page = page
             )
         except ConflictException as err:
             logging.warning(err)
@@ -565,6 +572,8 @@ class Commit(GiteaApiObject):
         api_object = cls(gitea)
         cls._initialize(gitea, api_object, result)
         BasicGiteaApiObject._add_readonly_property("inner_commit", commit_cache, api_object)
+        BasicGiteaApiObject._add_readonly_property("message", commit_cache['message'], api_object)
+        BasicGiteaApiObject._add_readonly_property("commit_date", Util.convert_time(commit_cache['committer']['date']), api_object)
         return api_object
 
 
@@ -821,7 +830,12 @@ class Gitea:
 
     def requests_get_commits(self, endpoint, page=1, params={}, requests=None):
         results = []
+        pages = params['pages'] if 'pages' in params else -1
+        page = params['page'] if 'page' in params else page
+        params.pop('page', None)
         page_endpoint = endpoint + f"?page={page}"
+        for k, v in params.items():
+            if v is not None: page_endpoint = page_endpoint + f"&{k}={v}"
         if not requests:
             request = self.requests.get(
                 self.__get_url(page_endpoint), headers=self.headers, params=params
@@ -831,9 +845,9 @@ class Gitea:
                 self.__get_url(page_endpoint), headers=self.headers, params=params
             )
         results += self.parse_result(request)
-        if request.headers.get("x-hasmore") == "true":
+        if request.headers.get("x-hasmore") == "true" and (pages == -1 or page <= pages):
             page += 1
-            results += self.requests_get_commits(endpoint, page)
+            results += self.requests_get_commits(endpoint, page, params)
         elif request.status_code not in [200, 201]:
             message = "Received status code: %s (%s)" % (
                 request.status_code,