diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..b7ff072
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2019, Software Heritage Developers
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e6e3c27
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+This repository contains a groovy library that's loaded by default in all
+Software Heritage jenkins jobs.
+
+You can find more information on shared pipeline libraries on the [Jenkins
+documentation](https://jenkins.io/doc/book/pipeline/shared-libraries/).
diff --git a/vars/jobExists.groovy b/vars/jobExists.groovy
index 779018f..17f8fbf 100644
--- a/vars/jobExists.groovy
+++ b/vars/jobExists.groovy
@@ -1,7 +1,11 @@
+// Copyright (C) 2019 The Software Heritage developers
+// License: MIT/Expat
+// See top-level LICENSE file for more information
+
 import jenkins.model.Jenkins
 
 @NonCPS
 def call(String name) {
   def instance = jenkins.model.Jenkins.instance
   return instance.getItemByFullName(name) != null
 }