Add license headers
diff --git a/openlane/user_proj_example/config.tcl b/openlane/user_proj_example/config.tcl
index a50398d..a3caf89 100644
--- a/openlane/user_proj_example/config.tcl
+++ b/openlane/user_proj_example/config.tcl
@@ -1,3 +1,18 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
+
set script_dir [file dirname [file normalize [info script]]]
set ::env(DESIGN_NAME) user_proj_example
diff --git a/openlane/user_proj_example/copy_results.sh b/openlane/user_proj_example/copy_results.sh
index d31feab..acee4ad 100755
--- a/openlane/user_proj_example/copy_results.sh
+++ b/openlane/user_proj_example/copy_results.sh
@@ -1,4 +1,18 @@
#!/bin/bash
+# SPDX-FileCopyrightText: (c) 2020 Harrison Pham <harrison@harrisonpham.com>
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
set -x
diff --git a/openlane/user_project_wrapper/config.tcl b/openlane/user_project_wrapper/config.tcl
index dcf50f3..b264f6f 100644
--- a/openlane/user_project_wrapper/config.tcl
+++ b/openlane/user_project_wrapper/config.tcl
@@ -1,3 +1,18 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
+
set script_dir [file dirname [file normalize [info script]]]
set ::env(DESIGN_NAME) user_project_wrapper
diff --git a/openlane/user_project_wrapper/gen_pdn.tcl b/openlane/user_project_wrapper/gen_pdn.tcl
index 9320fef..918b8da 100644
--- a/openlane/user_project_wrapper/gen_pdn.tcl
+++ b/openlane/user_project_wrapper/gen_pdn.tcl
@@ -1,3 +1,18 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
+
read_lef $::env(MERGED_LEF_UNPADDED)
read_def $::env(CURRENT_DEF)
diff --git a/openlane/user_project_wrapper/interactive.tcl b/openlane/user_project_wrapper/interactive.tcl
index 0d0c354..f8f93f4 100644
--- a/openlane/user_project_wrapper/interactive.tcl
+++ b/openlane/user_project_wrapper/interactive.tcl
@@ -1,3 +1,18 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
+
package require openlane
set script_dir [file dirname [file normalize [info script]]]
diff --git a/openlane/user_project_wrapper/pdn.tcl b/openlane/user_project_wrapper/pdn.tcl
index b7e5f09..5633d71 100644
--- a/openlane/user_project_wrapper/pdn.tcl
+++ b/openlane/user_project_wrapper/pdn.tcl
@@ -1,3 +1,18 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
+
# Power nets
set ::power_nets $::env(_VDD_NET_NAME)
set ::ground_nets $::env(_GND_NET_NAME)
