1 files changed, 13 insertions, 0 deletions
diff --git a/subplot/jt.py b/subplot/jt.py
index d6023b3..0117736 100644
--- a/subplot/jt.py
+++ b/subplot/jt.py
@@ -166,3 +166,16 @@ def file_name_has_suffix(ctx, varname=None, suffix=None):
     variables = ctx.get("variables", {})
     filename = variables[varname]
     assert filename.endswith(suffix)
+
+
+def git_is_clean(ctx, dirname=None):
+    runcmd_run = globals()["runcmd_run"]
+    runcmd_exit_code_is_zero = globals()["runcmd_exit_code_is_zero"]
+    runcmd_get_stdout = globals()["runcmd_get_stdout"]
+    assert_eq = globals()["assert_eq"]
+
+    runcmd_run(ctx, ["git", "status", "--porcelain"], cwd=dirname)
+    runcmd_exit_code_is_zero(ctx)
+
+    stdout = runcmd_get_stdout(ctx)
+    assert_eq(stdout, "")