feat(manager/nuget): update msbuild-sdks section in global.json

lib/manager/nuget/__fixtures__/msbuild-sdk-files/global.json

@@ -0,0 +1,9 @@
+{
+  "sdk": {
+    "version": "5.0.302",
+    "rollForward": "latestMajor"
+  },
+  "msbuild-sdks": {
+    "YoloDev.Sdk": "0.2.0"
+  }
+}

lib/manager/nuget/__fixtures__/msbuild-sdk-files/invalid-json/global.json

@@ -0,0 +1 @@
+invalid json

lib/manager/nuget/__fixtures__/msbuild-sdk-files/not-nuget/global.json

@@ -0,0 +1,3 @@
+{
+  "type": "not a nuget global.json"
+}

lib/manager/nuget/extract.spec.ts

@@ -113,6 +113,41 @@ describe('manager/nuget/extract', () => {
         await extractPackageFile(otherContents, otherPackageFile, config)
       ).toMatchSnapshot();
     });
+    it('extracts msbuild-sdks from global.json', async () => {
+      const packageFile = 'msbuild-sdk-files/global.json';
+      const contents = loadFixture(packageFile);
+      // FIXME: explicit assert condition
+      expect(await extractPackageFile(contents, packageFile, config))
+        .toMatchInlineSnapshot(`
+        Object {
+          "deps": Array [
+            Object {
+              "currentValue": "0",
+              "datasource": null,
+              "depName": "YoloDev.Sdk",
+              "depType": "nuget",
+              "skipReason": "unsupported-datasource",
+            },
+          ],
+        }
+      `);
+    });
+    it('handles malformed global.json', async () => {
+      const packageFile = 'msbuild-sdk-files/invalid-json/global.json';
+      const contents = loadFixture(packageFile);
+      // FIXME: explicit assert condition
+      expect(
+        await extractPackageFile(contents, packageFile, config)
+      ).toBeNull();
+    });
+    it('handles not-a-nuget global.json', async () => {
+      const packageFile = 'msbuild-sdk-files/not-nuget/global.json';
+      const contents = loadFixture(packageFile);
+      // FIXME: explicit assert condition
+      expect(
+        await extractPackageFile(contents, packageFile, config)
+      ).toBeNull();
+    });
 
     describe('.config/dotnet-tools.json', () => {
       const packageFile = '.config/dotnet-tools.json';
@@ -126,6 +161,7 @@ describe('manager/nuget/extract', () => {
     }
   }
 }`;
+
       it('works', async () => {
         // FIXME: explicit assert condition
         expect(

lib/manager/nuget/extract.ts

@@ -2,10 +2,11 @@ import { XmlDocument, XmlElement, XmlNode } from 'xmldoc';
 import { getGlobalConfig } from '../../config/global';
 import * as datasourceNuget from '../../datasource/nuget';
 import { logger } from '../../logger';
+import { SkipReason } from '../../types';
 import { getSiblingFileName, localPathExists } from '../../util/fs';
 import { hasKey } from '../../util/object';
 import type { ExtractConfig, PackageDependency, PackageFile } from '../types';
-import type { DotnetToolsManifest } from './types';
+import type { DotnetToolsManifest, MsbuildGlobalManifest } from './types';
 import { getConfiguredRegistries } from './util';
 
 /**
@@ -112,6 +113,42 @@ export async function extractPackageFile(
     return { deps };
   }
 
+  if (packageFile.endsWith('global.json')) {
+    const deps: PackageDependency[] = [];
+    let manifest: MsbuildGlobalManifest;
+
+    try {
+      manifest = JSON.parse(content);
+    } catch (err) {
+      logger.debug({ fileName: packageFile }, 'Invalid JSON');
+      return null;
+    }
+
+    if (manifest['msbuild-sdks'] === undefined) {
+      logger.debug(
+        { fileName: packageFile },
+        'This global.json is not a Nuget file'
+      );
+      return null;
+    }
+
+    for (const depName of Object.keys(manifest['msbuild-sdks'])) {
+      const sdk = manifest['msbuild-sdks'][depName];
+      const currentValue = sdk[0];
+      const dep: PackageDependency = {
+        depType: 'nuget',
+        depName,
+        currentValue,
+        datasource: null,
+        skipReason: SkipReason.UnsupportedDatasource,
+      };
+
+      deps.push(dep);
+    }
+
+    return { deps };
+  }
+
   let deps: PackageDependency[] = [];
   try {
     const parsedXml = new XmlDocument(content);

lib/manager/nuget/index.ts

@@ -10,5 +10,6 @@ export const defaultConfig = {
     '\\.(?:cs|fs|vb)proj$',
     '\\.(?:props|targets)$',
     '\\.config\\/dotnet-tools\\.json$',
+    '(^|//)global\\.json$',
   ],
 };

lib/manager/nuget/types.ts

@@ -14,3 +14,13 @@ export interface Registry {
   readonly url: string;
   readonly name?: string;
 }
+
+export interface MsbuildGlobalManifest {
+  readonly sdk: MsbuildSdk;
+  readonly 'msbuild-sdks': Record<string, string>;
+}
+
+export interface MsbuildSdk {
+  readonly version: string;
+  readonly rollForward: string;
+}

lib/types/skip-reason.ts

@@ -34,6 +34,7 @@ export enum SkipReason {
   UnknownVersion = 'unknown-version',
   UnknownVolta = 'unknown-volta',
   UnsupportedChartType = 'unsupported-chart-type',
+  UnsupportedDatasource = 'unsupported-datasource',
   UnsupportedRemote = 'unsupported-remote',
   UnsupportedUrl = 'unsupported-url',
   UnsupportedVersion = 'unsupported-version',