initial stdout & stderr shortcut support

Author: mr-c

draft-4/Process.yml

@@ -138,6 +138,36 @@ $graph:
     #   type: ["null", long]
     #   doc: Optional directory size.
 
+- name: stdout
+  type: record
+  doc: |
+    Only valid as a `type` for an output.
+
+    The following
+    ```
+    outputs:
+       an_output_name:
+       type: stdout
+
+    stdout: a_stdout_file
+    ```
+    is equivalent to
+    ```
+    outputs:
+       an_output_name:
+         type: File
+         outputBinding:
+           glob: a_stdout_file
+
+    stdout: a_stdout_file
+    ```
+
+    If there is no `stdout` name provided, a random filename will be created.
+
+
+- name: stderr
+  type: record
+  doc: Only valid as a `type` for an output.
 
 - name: SchemaBase
   type: record
@@ -213,6 +243,8 @@ $graph:
       type:
         - "null"
         - "#CWLType"
+        - "#stdout"
+        - "#stderr"
         - "sld:RecordSchema"
         - "sld:EnumSchema"
         - "sld:ArraySchema"

draft-4/conformance_test_draft-4.yaml

@@ -57,6 +57,43 @@
   tool: draft-4/cat3-tool.cwl
   doc: Test command execution in Docker with stdout redirection
 
+- job: draft-4/cat-job.json
+  tool: draft-4/cat3-tool-shortcut.cwl
+  doc: Test command execution in Docker with stdout redirection
+
+- job: draft-4/cat-job.json
+  output:
+    output_file:
+      class: File
+      checksum: sha1$47a013e660d408619d894b20806b1d5086aab03b
+      path: cat-out
+      size: 13
+  tool: draft-4/cat3-tool-mediumcut.cwl
+  doc: Test command execution in Docker with stdout redirection
+
+- args: [egrep]
+  stderr: error.txt
+  job:
+  tool: draft-4/egrep-stderr.cwl
+  doc: Test command line with stderr redirection
+
+- args: [egrep]
+  job:
+  tool: draft-4/egrep-stderr-shortcut.cwl
+  doc: Test command line with stderr redirection, brief syntax
+
+- args: [egrep]
+  stderr: std.err
+  output:
+    output_file:
+      class: File
+      size: 84
+      checksum: sha1$cec7b8746a78c42060c96505887449bca0142976
+      path: std.err
+  job:
+  tool: draft-4/egrep-stderr-mediumcut.cwl
+  doc: Test command line with stderr redirection, named brief syntax
+
 - job: draft-4/cat-job.json
   output:
     output_txt: