From 2ed13ca5e4c779b59d04e574a496b6cb69bcba44 Mon Sep 17 00:00:00 2001
From: Arun Isaac
Date: Sun, 21 Feb 2021 19:44:54 +0530
Subject: Add CWL generator for Workflow workflows

---
 scripts/generate-cwl.scm | 53 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/scripts/generate-cwl.scm b/scripts/generate-cwl.scm
index a28cdb0..1a26dfb 100644
--- a/scripts/generate-cwl.scm
+++ b/scripts/generate-cwl.scm
@@ -128,3 +128,56 @@ lists---the base command and the actual arguments."
       ,@(if stderr
             `((stderr . ,stderr))
             '()))))
+
+(define-record-type (<workflow-output> make-workflow-output workflow-output?)
+  (fields (immutable id workflow-output-id)
+          (immutable type workflow-output-type)
+          (immutable source workflow-output-source)
+          (immutable other workflow-output-other)))
+
+(define* (workflow-output id #:key type source (other '()))
+  "Build and return a <workflow-output> object."
+  (make-workflow-output id type source other))
+
+(define-record-type (<step> step step?)
+  (fields (immutable id step-id)
+          (immutable run step-run)
+          (immutable in step-in)
+          (immutable out step-out)))
+
+(define* (workflow steps outputs #:key (other '()))
+  "Build a Workflow class CWL workflow."
+  `((cwlVersion . "v1.1")
+    (class . Workflow)
+    ,@other
+    (inputs . ,(delete-duplicates
+                (map input->tree
+                     (append
+                      (append-map (lambda (step)
+                                    (filter-map (match-lambda
+                                                  ((id . (? input? input)) input)
+                                                  (_ #f))
+                                                (step-in step)))
+                                  steps)
+                      (filter-map (lambda (output)
+                                    (and (input? (workflow-output-source output))
+                                         (workflow-output-source output)))
+                                  outputs)))))
+    (outputs . ,(map (lambda (output)
+                       `(,(workflow-output-id output)
+                         (type . ,(workflow-output-type output))
+                         (output-source . ,(match (workflow-output-source output)
+                                             ((? string? source) source)
+                                             ((? input? input) (input-id input))))))
+                     outputs))
+    (steps . ,(map (lambda (step)
+                     `(,(step-id step)
+                       (in . ,(map (match-lambda
+                                     ((id . input)
+                                      (cons id (if (input? input)
+                                                   (input-id input)
+                                                   input))))
+                                   (step-in step)))
+                       (out . ,(list->vector (step-out step)))
+                       (run . ,(step-run step))))
+                   steps))))
-- 
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