1 files changed, 110 insertions, 0 deletions
diff --git a/lib/python/qmk/git.py b/lib/python/qmk/git.py
new file mode 100644
index 0000000000..beeb689144
--- /dev/null
+++ b/lib/python/qmk/git.py
@@ -0,0 +1,110 @@
+"""Functions for working with the QMK repo.
+"""
+from subprocess import DEVNULL
+from pathlib import Path
+
+from milc import cli
+
+from qmk.constants import QMK_FIRMWARE
+
+
+def git_get_version(repo_dir='.', check_dir='.'):
+    """Returns the current git version for a repo, or None.
+    """
+    git_describe_cmd = ['git', 'describe', '--abbrev=6', '--dirty', '--always', '--tags']
+
+    if repo_dir != '.':
+        repo_dir = Path('lib') / repo_dir
+
+    if check_dir != '.':
+        check_dir = repo_dir / check_dir
+
+    if Path(check_dir).exists():
+        git_describe = cli.run(git_describe_cmd, stdin=DEVNULL, cwd=repo_dir)
+
+        if git_describe.returncode == 0:
+            return git_describe.stdout.strip()
+
+        else:
+            cli.log.warn(f'"{" ".join(git_describe_cmd)}" returned error code {git_describe.returncode}')
+            print(git_describe.stderr)
+            return None
+
+    return None
+
+
+def git_get_username():
+    """Retrieves user's username from Git config, if set.
+    """
+    git_username = cli.run(['git', 'config', '--get', 'user.name'])
+
+    if git_username.returncode == 0 and git_username.stdout:
+        return git_username.stdout.strip()
+
+
+def git_get_branch():
+    """Returns the current branch for a repo, or None.
+    """
+    git_branch = cli.run(['git', 'branch', '--show-current'])
+    if not git_branch.returncode != 0 or not git_branch.stdout:
+        # Workaround for Git pre-2.22
+        git_branch = cli.run(['git', 'rev-parse', '--abbrev-ref', 'HEAD'])
+
+    if git_branch.returncode == 0:
+        return git_branch.stdout.strip()
+
+
+def git_get_tag():
+    """Returns the current tag for a repo, or None.
+    """
+    git_tag = cli.run(['git', 'describe', '--abbrev=0', '--tags'])
+    if git_tag.returncode == 0:
+        return git_tag.stdout.strip()
+
+
+def git_get_remotes():
+    """Returns the current remotes for a repo.
+    """
+    remotes = {}
+
+    git_remote_show_cmd = ['git', 'remote', 'show']
+    git_remote_get_cmd = ['git', 'remote', 'get-url']
+
+    git_remote_show = cli.run(git_remote_show_cmd)
+    if git_remote_show.returncode == 0:
+        for name in git_remote_show.stdout.splitlines():
+            git_remote_name = cli.run([*git_remote_get_cmd, name])
+            remotes[name.strip()] = {"url": git_remote_name.stdout.strip()}
+
+    return remotes
+
+
+def git_is_dirty():
+    """Returns 1 if repo is dirty, or 0 if clean
+    """
+    git_diff_staged_cmd = ['git', 'diff', '--quiet']
+    git_diff_unstaged_cmd = [*git_diff_staged_cmd, '--cached']
+
+    unstaged = cli.run(git_diff_staged_cmd)
+    staged = cli.run(git_diff_unstaged_cmd)
+
+    return unstaged.returncode != 0 or staged.returncode != 0
+
+
+def git_check_repo():
+    """Checks that the .git directory exists inside QMK_HOME.
+
+    This is a decent enough indicator that the qmk_firmware directory is a
+    proper Git repository, rather than a .zip download from GitHub.
+    """
+    dot_git_dir = QMK_FIRMWARE / '.git'
+
+    return dot_git_dir.is_dir()
+
+
+def git_check_deviation(active_branch):
+    """Return True if branch has custom commits
+    """
+    cli.run(['git', 'fetch', 'upstream', active_branch])
+    deviations = cli.run(['git', '--no-pager', 'log', f'upstream/{active_branch}...{active_branch}'])
+    return bool(deviations.returncode)