feat: dep-graph json output file

When both `--print-deps` and `--json-file-output` are being used
produce a depGraph object in the resulting JSON file.

Does not attempt to fix any existing `--json` output formats to reduce
the potential of breaking changes.

This allows CLI users to see the dependency graph that was resolved
by the plugin code and scanned.

src/lib/snyk-test/legacy.ts

@@ -165,6 +165,7 @@ export interface LegacyVulnApiResult extends BasicResultData {
   filesystemPolicy?: boolean;
   uniqueCount?: any;
   remediation?: RemediationChanges;
+  depGraph?: depGraphLib.DepGraphData;
 }
 
 export interface BaseImageRemediation {
@@ -452,6 +453,10 @@ function convertTestDepGraphResultToLegacy(
     remediation: result.remediation,
   };
 
+  if (options['print-deps'] && options['json-file-output']) {
+    legacyRes.depGraph = depGraph.toJSON();
+  }
+
   return legacyRes;
 }
 

test/jest/acceptance/cli-json-file-output.spec.ts

@@ -4,6 +4,7 @@ import { createProjectFromWorkspace } from '../util/createProject';
 import { runSnykCLI } from '../util/runSnykCLI';
 import { humanFileSize } from '../../utils';
 import { getServerPort } from '../util/getServerPort';
+import * as depGraphLib from '@snyk/dep-graph';
 
 jest.setTimeout(1000 * 60);
 
@@ -112,4 +113,45 @@ describe('test --json-file-output', () => {
     expect(fileExists).toBeFalsy();
     expect(code).toEqual(0);
   });
+
+  describe('print-deps and json-file-output', () => {
+    it.only('saves JSON output to file with depGraph when --print-deps and --json-file-output are being used', async () => {
+      const project = await createProjectFromWorkspace('maven-app');
+      const outputPath = 'json-file-output.json';
+
+      const { code } = await runSnykCLI(
+        `test --print-deps --json-file-output=${outputPath}`,
+        {
+          cwd: project.path(),
+          env,
+        },
+      );
+
+      expect(code).toEqual(0);
+      const json = await project.readJSON(outputPath);
+      expect(json.depGraph).toBeTruthy();
+      const depGraph = depGraphLib.createFromJSON(json.depGraph);
+      expect(depGraph.getPkgs()).toContainEqual({
+        name: 'axis:axis',
+        version: '1.4',
+      });
+    });
+
+    it('saves JSON output to file without a depGraph when --print-deps is not used', async () => {
+      const project = await createProjectFromWorkspace('maven-app');
+      const outputPath = 'json-file-output.json';
+
+      const { code } = await runSnykCLI(
+        `test --json-file-output=${outputPath}`,
+        {
+          cwd: project.path(),
+          env,
+        },
+      );
+
+      expect(code).toEqual(0);
+      const json = await project.readJSON(outputPath);
+      expect(json.depGraph).toBeUndefined();
+    });
+  });
 });