Add utility for getting relative path of file based on git repo root …

…location

(refs idaholab#16410)

python/mooseutils/__init__.py

@@ -13,7 +13,7 @@
 from .mooseutils import generate_filebase, recursive_update, fuzzyEqual, fuzzyAbsoluteEqual
 from .gitutils import is_git_repo, git_commit, git_commit_message, git_merge_commits, git_ls_files
 from .gitutils import git_root_dir, git_init_submodule, git_submodule_status, git_version
-from .gitutils import git_authors, git_lines, git_committers
+from .gitutils import git_authors, git_lines, git_committers, git_localpath
 from .message import mooseDebug, mooseWarning, mooseMessage, mooseError
 from .MooseException import MooseException
 from .eval_path import eval_path

python/mooseutils/gitutils.py

@@ -150,3 +150,10 @@ def git_committers(loc=os.getcwd(), *args):
         items = line.split("\t", 1)
         counts[items[1]] = int(items[0])
     return counts
+
+def git_localpath(filename):
+    """
+    Return the path from the root of the repository.
+    """
+    root = git_root_dir(os.path.dirname(filename))
+    return os.path.relpath(filename, root)

python/mooseutils/tests/test_gitutils.py

@@ -120,6 +120,10 @@ def testGitLines(self):
         self.assertTrue(counts['Andrew E. Slaughter'] > 0)
         self.assertEqual(n_with_blank, sum(list(counts.values())))
 
+    def testGitLocalPath(self):
+        filename = os.path.abspath(__file__)
+        local = mooseutils.git_localpath(filename)
+        self.assertEqual(local, 'python/mooseutils/tests/test_gitutils.py')
 
 if __name__ == '__main__':
     unittest.main(verbosity=2, buffer=True)