On run check the system only if something changed

1 files changed, 18 insertions, 0 deletions

diff --git a/devbot/utils.py b/devbot/utils.py
new file mode 100644
index 0000000..2864948
--- /dev/null
+++ b/devbot/utils.py
@@ -0,0 +1,18 @@
+import os
+import subprocess
+
+devnull = open("/dev/null", "w")
+
+def get_commit_id(dir):
+    orig_cwd = os.getcwd()
+    os.chdir(dir)
+
+    try:
+        commit_id = subprocess.check_output(["git", "rev-parse", "HEAD"],
+                                            stderr=devnull).strip()
+    except subprocess.CalledProcessError:
+        commit_id = None
+
+    os.chdir(orig_cwd)
+
+    return commit_id