Allow 6.x versions of FHIR

FHIR version 6 is currently in balloting stages. It does not appear that
any code changes are needed yet for allowing an R6 IG. The usual warning
about prerelease versions will be shown when one of the ballot versions
is used.

src/utils/Processing.ts

@@ -85,9 +85,9 @@ export const AUTOMATIC_DEPENDENCIES: AutomaticDependency[] = [
 ];
 
 export function isSupportedFHIRVersion(version: string): boolean {
-  // For now, allow current or any 4.x/5.x version of FHIR except 4.0.0. This is a quick check; not a guarantee.  If a user passes
+  // For now, allow current or any 4.x/5.x/6.x version of FHIR except 4.0.0. This is a quick check; not a guarantee.  If a user passes
   // in an invalid version that passes this test (e.g., 4.99.0), it is still expected to fail when we load dependencies.
-  return version !== '4.0.0' && /^(current|[45]\.\d+.\d+(-.+)?)$/.test(version);
+  return version !== '4.0.0' && /^(current|[456]\.\d+.\d+(-.+)?)$/.test(version);
 }
 
 export function ensureInputDir(input: string): string {

test/utils/Processing.test.ts

@@ -426,6 +426,12 @@ describe('Processing', () => {
       expect(config.fhirVersion).toEqual(['4.5.0']);
     });
 
+    it('should allow FHIR R6', () => {
+      const input = path.join(__dirname, 'fixtures', 'fhir-r6');
+      const config = readConfig(input);
+      expect(config.fhirVersion).toEqual(['6.0.0-ballot2']);
+    });
+
     it('should allow FHIR current', () => {
       const input = path.join(__dirname, 'fixtures', 'fhir-current');
       const config = readConfig(input);

test/utils/fixtures/fhir-r6/sushi-config.yaml

@@ -0,0 +1,9 @@
+id: fhir.us.minimal
+canonical: http://hl7.org/fhir/us/minimal
+name: MinimalIG
+status: draft
+version: 1.0.0
+fhirVersion: 6.0.0-ballot2
+copyrightYear: 2020+
+releaseLabel: Build CI
+template: hl7.fhir.template#0.0.5