feat: add ability to suppress git hints

It can be done by setting options in command. The commit author/email is
also now using this logic

src/ahriman/application/handlers/patch.py

@@ -98,6 +98,7 @@ class Patch(Handler):
             PkgbuildPatch: created patch for the PKGBUILD function
         """
         if patch_path is None:
+            # pylint: disable=bad-builtin
             print("Post new function or variable value below. Press Ctrl-D to finish:", file=sys.stderr)
             patch = "".join(list(sys.stdin))
         else:

src/ahriman/application/handlers/update.py

@@ -77,5 +77,5 @@ class Update(Handler):
             Callable[[str], None]: in case if dry_run is set it will return print, logger otherwise
         """
         def inner(line: str) -> None:
-            return print(line) if dry_run else application.logger.info(line)
+            return print(line) if dry_run else application.logger.info(line)  # pylint: disable=bad-builtin
         return inner

src/ahriman/core/build_tools/sources.py

@@ -19,6 +19,7 @@
 #
 import shutil
 
+from collections.abc import Generator
 from pathlib import Path
 
 from ahriman.core.exceptions import CalledProcessError
@@ -38,10 +39,14 @@ class Sources(LazyLogging):
         DEFAULT_BRANCH(str): (class attribute) default branch to process git repositories.
             Must be used only for local stored repositories, use RemoteSource descriptor instead for real packages
         DEFAULT_COMMIT_AUTHOR(tuple[str, str]): (class attribute) default commit author to be used if none set
+        GITCONFIG(dict[str, str]): (class attribute) git config options to suppress annoying hints
     """
 
     DEFAULT_BRANCH = "master"  # default fallback branch
     DEFAULT_COMMIT_AUTHOR = ("ahriman", "ahriman@localhost")
+    GITCONFIG = {
+        "init.defaultBranch": DEFAULT_BRANCH,
+    }
 
     @staticmethod
     def changes(source_dir: Path, last_commit_sha: str | None) -> str | None:
@@ -106,15 +111,15 @@ class Sources(LazyLogging):
             instance.fetch_until(sources_dir, branch=branch)
         elif remote.git_url is not None:
             instance.logger.info("clone remote %s to %s using branch %s", remote.git_url, sources_dir, branch)
-            check_output("git", "clone", "--quiet", "--depth", "1", "--branch", branch, "--single-branch",
+            check_output(*instance.git(), "clone", "--quiet", "--depth", "1", "--branch", branch, "--single-branch",
                          remote.git_url, str(sources_dir), cwd=sources_dir.parent, logger=instance.logger)
         else:
             # it will cause an exception later
             instance.logger.error("%s is not initialized, but no remote provided", sources_dir)
 
         # and now force reset to our branch
-        check_output("git", "checkout", "--force", branch, cwd=sources_dir, logger=instance.logger)
-        check_output("git", "reset", "--quiet", "--hard", f"origin/{branch}",
+        check_output(*instance.git(), "checkout", "--force", branch, cwd=sources_dir, logger=instance.logger)
+        check_output(*instance.git(), "reset", "--quiet", "--hard", f"origin/{branch}",
                      cwd=sources_dir, logger=instance.logger)
 
         # move content if required
@@ -136,7 +141,7 @@ class Sources(LazyLogging):
             bool: True in case if there is any remote and false otherwise
         """
         instance = Sources()
-        remotes = check_output("git", "remote", cwd=sources_dir, logger=instance.logger)
+        remotes = check_output(*instance.git(), "remote", cwd=sources_dir, logger=instance.logger)
         return bool(remotes)
 
     @staticmethod
@@ -150,7 +155,7 @@ class Sources(LazyLogging):
         instance = Sources()
         if not (sources_dir / ".git").is_dir():
             # skip initializing in case if it was already
-            check_output("git", "init", "--quiet", "--initial-branch", instance.DEFAULT_BRANCH,
+            check_output(*instance.git(), "init", "--quiet", "--initial-branch", instance.DEFAULT_BRANCH,
                          cwd=sources_dir, logger=instance.logger)
 
         # extract local files...
@@ -220,7 +225,7 @@ class Sources(LazyLogging):
             return  # no changes to push, just skip action
 
         git_url, branch = remote.git_source()
-        check_output("git", "push", "--quiet", git_url, branch, cwd=sources_dir, logger=instance.logger)
+        check_output(*instance.git(), "push", "--quiet", git_url, branch, cwd=sources_dir, logger=instance.logger)
 
     def add(self, sources_dir: Path, *pattern: str, intent_to_add: bool = False) -> None:
         """
@@ -241,7 +246,7 @@ class Sources(LazyLogging):
         self.logger.info("found matching files %s", found_files)
         # add them to index
         args = ["--intent-to-add"] if intent_to_add else []
-        check_output("git", "add", *args, *[str(fn.relative_to(sources_dir)) for fn in found_files],
+        check_output(*self.git(), "add", *args, *[str(fn.relative_to(sources_dir)) for fn in found_files],
                      cwd=sources_dir, logger=self.logger)
 
     def commit(self, sources_dir: Path, message: str | None = None,
@@ -264,15 +269,16 @@ class Sources(LazyLogging):
         if message is None:
             message = f"Autogenerated commit at {utcnow()}"
         args = ["--message", message]
-        environment: dict[str, str] = {}
 
         if commit_author is None:
             commit_author = self.DEFAULT_COMMIT_AUTHOR
         user, email = commit_author
-        environment["GIT_AUTHOR_NAME"] = environment["GIT_COMMITTER_NAME"] = user
-        environment["GIT_AUTHOR_EMAIL"] = environment["GIT_COMMITTER_EMAIL"] = email
+        gitconfig = {
+            "user.email": email,
+            "user.name": user,
+        }
 
-        check_output("git", "commit", "--quiet", *args, cwd=sources_dir, logger=self.logger, environment=environment)
+        check_output(*self.git(gitconfig), "commit", "--quiet", *args, cwd=sources_dir, logger=self.logger)
 
         return True
 
@@ -290,7 +296,7 @@ class Sources(LazyLogging):
         args = []
         if sha is not None:
             args.append(sha)
-        return check_output("git", "diff", *args, cwd=sources_dir, logger=self.logger)
+        return check_output(*self.git(), "diff", *args, cwd=sources_dir, logger=self.logger)
 
     def fetch_until(self, sources_dir: Path, *, branch: str | None = None, commit_sha: str | None = None) -> None:
         """
@@ -306,18 +312,37 @@ class Sources(LazyLogging):
 
         commits_count = 1
         while commit_sha is not None:
-            command = ["git", "fetch", "--quiet", "--depth", str(commits_count)]
+            command = self.git() + ["fetch", "--quiet", "--depth", str(commits_count)]
             if branch is not None:
                 command += ["origin", branch]
             check_output(*command, cwd=sources_dir, logger=self.logger)  # fetch one more level
 
             try:
                 # check if there is an object in current git directory
-                check_output("git", "cat-file", "-e", commit_sha, cwd=sources_dir, logger=self.logger)
+                check_output(*self.git(), "cat-file", "-e", commit_sha, cwd=sources_dir, logger=self.logger)
                 commit_sha = None  # reset search
             except CalledProcessError:
                 commits_count += 1  # increase depth
 
+    def git(self, gitconfig: dict[str, str] | None = None) -> list[str]:
+        """
+        git command prefix
+
+        Args:
+            gitconfig(dict[str, str] | None, optional): additional git config flags if any (Default value = None)
+
+        Returns:
+            list[str]: git command prefix with valid default flags
+        """
+        gitconfig = gitconfig or {}
+
+        def configuration_flags() -> Generator[str, None, None]:
+            for option, value in (self.GITCONFIG | gitconfig).items():
+                yield "-c"
+                yield f"{option}=\"{value}\""
+
+        return ["git"] + list(configuration_flags())
+
     def has_changes(self, sources_dir: Path) -> bool:
         """
         check if there are changes in current git tree
@@ -329,7 +354,7 @@ class Sources(LazyLogging):
             bool: True if there are uncommitted changes and False otherwise
         """
         # there is --exit-code argument to diff, however, there might be other process errors
-        changes = check_output("git", "diff", "--cached", "--name-only", cwd=sources_dir, logger=self.logger)
+        changes = check_output(*self.git(), "diff", "--cached", "--name-only", cwd=sources_dir, logger=self.logger)
         return bool(changes)
 
     def head(self, sources_dir: Path, ref_name: str = "HEAD") -> str:
@@ -344,7 +369,7 @@ class Sources(LazyLogging):
             str: HEAD commit hash
         """
         # we might want to parse git files instead though
-        return check_output("git", "rev-parse", ref_name, cwd=sources_dir, logger=self.logger)
+        return check_output(*self.git(), "rev-parse", ref_name, cwd=sources_dir, logger=self.logger)
 
     def move(self, pkgbuild_dir: Path, sources_dir: Path) -> None:
         """
@@ -372,7 +397,7 @@ class Sources(LazyLogging):
         # create patch
         self.logger.info("apply patch %s from database at %s", patch.key, sources_dir)
         if patch.is_plain_diff:
-            check_output("git", "apply", "--ignore-space-change", "--ignore-whitespace",
+            check_output(*self.git(), "apply", "--ignore-space-change", "--ignore-whitespace",
                          cwd=sources_dir, input_data=patch.serialize(), logger=self.logger)
         else:
             patch.write(sources_dir / "PKGBUILD")