1 files changed, 102 insertions, 0 deletions
diff --git a/test/lib/ansible_test/_internal/git.py b/test/lib/ansible_test/_internal/git.py
new file mode 100644
index 0000000..c1909f0
--- /dev/null
+++ b/test/lib/ansible_test/_internal/git.py
@@ -0,0 +1,102 @@
+"""Wrapper around git command-line tools."""
+from __future__ import annotations
+
+import re
+import typing as t
+
+from .util import (
+    SubprocessError,
+    raw_command,
+)
+
+
+class Git:
+    """Wrapper around git command-line tools."""
+    def __init__(self, root: t.Optional[str] = None) -> None:
+        self.git = 'git'
+        self.root = root
+
+    def get_diff(self, args: list[str], git_options: t.Optional[list[str]] = None) -> list[str]:
+        """Run `git diff` and return the result as a list."""
+        cmd = ['diff'] + args
+        if git_options is None:
+            git_options = ['-c', 'core.quotePath=']
+        return self.run_git_split(git_options + cmd, '\n', str_errors='replace')
+
+    def get_diff_names(self, args: list[str]) -> list[str]:
+        """Return a list of file names from the `git diff` command."""
+        cmd = ['diff', '--name-only', '--no-renames', '-z'] + args
+        return self.run_git_split(cmd, '\0')
+
+    def get_submodule_paths(self) -> list[str]:
+        """Return a list of submodule paths recursively."""
+        cmd = ['submodule', 'status', '--recursive']
+        output = self.run_git_split(cmd, '\n')
+        submodule_paths = [re.search(r'^.[0-9a-f]+ (?P<path>[^ ]+)', line).group('path') for line in output]
+
+        # status is returned for all submodules in the current git repository relative to the current directory
+        # when the current directory is not the root of the git repository this can yield relative paths which are not below the current directory
+        # this can occur when multiple collections are in a git repo and some collections are submodules when others are not
+        # specifying "." as the path to enumerate would limit results to the current directory, but can cause the git command to fail with the error:
+        #   error: pathspec '.' did not match any file(s) known to git
+        # this can occur when the current directory contains no files tracked by git
+        # instead we'll filter out the relative paths, since we're only interested in those at or below the current directory
+        submodule_paths = [path for path in submodule_paths if not path.startswith('../')]
+
+        return submodule_paths
+
+    def get_file_names(self, args: list[str]) -> list[str]:
+        """Return a list of file names from the `git ls-files` command."""
+        cmd = ['ls-files', '-z'] + args
+        return self.run_git_split(cmd, '\0')
+
+    def get_branches(self) -> list[str]:
+        """Return the list of branches."""
+        cmd = ['for-each-ref', 'refs/heads/', '--format', '%(refname:strip=2)']
+        return self.run_git_split(cmd)
+
+    def get_branch(self) -> str:
+        """Return the current branch name."""
+        cmd = ['symbolic-ref', '--short', 'HEAD']
+        return self.run_git(cmd).strip()
+
+    def get_rev_list(self, commits: t.Optional[list[str]] = None, max_count: t.Optional[int] = None) -> list[str]:
+        """Return the list of results from the `git rev-list` command."""
+        cmd = ['rev-list']
+
+        if commits:
+            cmd += commits
+        else:
+            cmd += ['HEAD']
+
+        if max_count:
+            cmd += ['--max-count', '%s' % max_count]
+
+        return self.run_git_split(cmd)
+
+    def get_branch_fork_point(self, branch: str) -> str:
+        """Return a reference to the point at which the given branch was forked."""
+        cmd = ['merge-base', '--fork-point', branch]
+        return self.run_git(cmd).strip()
+
+    def is_valid_ref(self, ref: str) -> bool:
+        """Return True if the given reference is valid, otherwise return False."""
+        cmd = ['show', ref]
+        try:
+            self.run_git(cmd, str_errors='replace')
+            return True
+        except SubprocessError:
+            return False
+
+    def run_git_split(self, cmd: list[str], separator: t.Optional[str] = None, str_errors: str = 'strict') -> list[str]:
+        """Run the given `git` command and return the results as a list."""
+        output = self.run_git(cmd, str_errors=str_errors).strip(separator)
+
+        if not output:
+            return []
+
+        return output.split(separator)
+
+    def run_git(self, cmd: list[str], str_errors: str = 'strict') -> str:
+        """Run the given `git` command and return the results as a string."""
+        return raw_command([self.git] + cmd, cwd=self.root, capture=True, str_errors=str_errors)[0]