Merge pull request #70 from common-workflow-language/cwl_example

Example of programmatic CWL creation

Author: tetron

create_cwl_from_objects.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: Apache-2.0
+import cwl_utils.parser_v1_2 as cwl
+
+from ruamel import yaml
+
+def main() -> None:
+ """Generate a CWL object to match "cat-tool.cwl"."""
+ inputs = [cwl.CommandInputParameter(id="file1", type="File")]
+ outputs = [
+ cwl.CommandOutputParameter(
+ id="output",
+ type="File",
+ outputBinding=cwl.CommandOutputBinding(glob="output"),
+ )
+ ]
+ cat_tool = cwl.CommandLineTool(
+ inputs=inputs,
+ outputs=outputs,
+ cwlVersion="v1.2",
+ baseCommand="cat",
+ stdin="$(inputs.file1.path)",
+ stdout="output",
+ )
+ print(yaml.main.round_trip_dump(cat_tool.save()))
+
+
+if __name__ == "__main__":
+ main()