new file mode 100755
@@ -0,0 +1,94 @@
+#!/usr/bin/env python3
+#
+# check-dco.py: validate all commits are signed off
+#
+# Copyright (C) 2020 Red Hat, Inc.
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+import os
+import os.path
+import sys
+import subprocess
+
+namespace = "qemu-project"
+if len(sys.argv) >= 2:
+ namespace = sys.argv[1]
+
+cwd = os.getcwd()
+reponame = os.path.basename(cwd)
+repourl = "https://gitlab.com/%s/%s.git" % (namespace, reponame)
+
+subprocess.check_call(["git", "remote", "add", "check-dco", repourl])
+subprocess.check_call(["git", "fetch", "check-dco", "master"],
+ stdout=subprocess.DEVNULL,
+ stderr=subprocess.DEVNULL)
+
+ancestor = subprocess.check_output(["git", "merge-base",
+ "check-dco/master", "HEAD"],
+ universal_newlines=True)
+
+ancestor = ancestor.strip()
+
+subprocess.check_call(["git", "remote", "rm", "check-dco"])
+
+errors = False
+
+print("\nChecking for 'Signed-off-by: NAME <EMAIL>' " +
+ "on all commits since %s...\n" % ancestor)
+
+log = subprocess.check_output(["git", "log", "--format=%H %s",
+ ancestor + "..."],
+ universal_newlines=True)
+
+if log == "":
+ commits = []
+else:
+ commits = [[c[0:40], c[41:]] for c in log.strip().split("\n")]
+
+for sha, subject in commits:
+
+ msg = subprocess.check_output(["git", "show", "-s", sha],
+ universal_newlines=True)
+ lines = msg.strip().split("\n")
+
+ print("🔍 %s %s" % (sha, subject))
+ sob = False
+ for line in lines:
+ if "Signed-off-by:" in line:
+ sob = True
+ if "localhost" in line:
+ print(" ❌ FAIL: bad email in %s" % line)
+ errors = True
+
+ if not sob:
+ print(" ❌ FAIL missing Signed-off-by tag")
+ errors = True
+
+if errors:
+ print("""
+
+❌ ERROR: One or more commits are missing a valid Signed-off-By tag.
+
+
+This project requires all contributors to assert that their contributions
+are provided in compliance with the terms of the Developer's Certificate
+of Origin 1.1 (DCO):
+
+ https://developercertificate.org/
+
+To indicate acceptance of the DCO every commit must have a tag
+
+ Signed-off-by: REAL NAME <EMAIL>
+
+This can be achieved by passing the "-s" flag to the "git commit" command.
+
+To bulk update all commits on current branch "git rebase" can be used:
+
+ git rebase -i master -x 'git commit --amend --no-edit -s'
+
+""")
+
+ sys.exit(1)
+
+sys.exit(0)
@@ -411,3 +411,13 @@ check-patch:
variables:
GIT_DEPTH: 1000
allow_failure: true
+
+check-dco:
+ stage: build
+ image: $CI_REGISTRY_IMAGE/qemu/centos8:latest
+ script: .gitlab-ci.d/check-dco.py
+ except:
+ variables:
+ - $CI_PROJECT_NAMESPACE == 'qemu-project' && $CI_COMMIT_BRANCH == 'master'
+ variables:
+ GIT_DEPTH: 1000