fix(gradle-lite): Inherit variables from parent build.gradle (#8451)

lib/manager/gradle-lite/extract.spec.ts

@@ -66,4 +66,34 @@ describe('manager/gradle-lite/extract', () => {
       },
     ]);
   });
+
+  it('inherits gradle variables', async () => {
+    const fsMock = {
+      'gradle.properties': 'foo=1.0.0',
+      'build.gradle': 'foo = "1.0.1"',
+      'aaa/gradle.properties': 'bar = "2.0.0"',
+      'aaa/build.gradle': 'bar = "2.0.1"',
+      'aaa/bbb/build.gradle': ['foo:foo:$foo', 'bar:bar:$bar']
+        .map((x) => `"${x}"`)
+        .join('\n'),
+    };
+
+    mockFs(fsMock);
+
+    const res = await extractAllPackageFiles({} as never, Object.keys(fsMock));
+
+    expect(res).toMatchObject([
+      { packageFile: 'gradle.properties', deps: [] },
+      {
+        packageFile: 'build.gradle',
+        deps: [{ depName: 'foo:foo', currentValue: '1.0.1' }],
+      },
+      { packageFile: 'aaa/gradle.properties', deps: [] },
+      {
+        packageFile: 'aaa/build.gradle',
+        deps: [{ depName: 'bar:bar', currentValue: '2.0.1' }],
+      },
+      { packageFile: 'aaa/bbb/build.gradle', deps: [] },
+    ]);
+  });
 });

lib/manager/gradle-lite/extract.ts

@@ -3,7 +3,7 @@ import * as datasourceMaven from '../../datasource/maven';
 import { logger } from '../../logger';
 import { readLocalFile } from '../../util/fs';
 import { ExtractConfig, PackageDependency, PackageFile } from '../common';
-import { ManagerData, VariableRegistry } from './common';
+import { ManagerData, PackageVariables, VariableRegistry } from './common';
 import { parseGradle, parseProps } from './parser';
 import {
   getVars,
@@ -46,18 +46,30 @@ export async function extractAllPackageFiles(
     try {
       const content = await readLocalFile(packageFile, 'utf8');
       const dir = upath.dirname(toAbsolutePath(packageFile));
+
+      const updateVars = (newVars: PackageVariables): void => {
+        const oldVars = registry[dir] || {};
+        registry[dir] = { ...oldVars, ...newVars };
+      };
+
       if (isPropsFile(packageFile)) {
         const { vars, deps } = parseProps(content, packageFile);
-        registry[dir] = vars;
+        updateVars(vars);
         extractedDeps.push(...deps);
       } else if (isGradleFile(packageFile)) {
         const vars = getVars(registry, dir);
-        const { deps, urls } = parseGradle(content, vars, packageFile);
+        const { deps, urls, vars: gradleVars } = parseGradle(
+          content,
+          vars,
+          packageFile
+        );
         urls.forEach((url) => {
           if (!registryUrls.includes(url)) {
             registryUrls.push(url);
           }
         });
+        registry[dir] = { ...registry[dir], ...gradleVars };
+        updateVars(gradleVars);
         extractedDeps.push(...deps);
       }
     } catch (e) {

lib/manager/gradle-lite/parser.ts

@@ -458,12 +458,18 @@ function tryMatch({
   return null;
 }
 
+interface ParseGradleResult {
+  deps: PackageDependency<ManagerData>[];
+  urls: string[];
+  vars: PackageVariables;
+}
+
 export function parseGradle(
   input: string,
   initVars: PackageVariables = {},
   packageFile?: string
-): { deps: PackageDependency<ManagerData>[]; urls: string[] } {
-  const vars = { ...initVars };
+): ParseGradleResult {
+  const vars: PackageVariables = { ...initVars };
   const deps: PackageDependency<ManagerData>[] = [];
   const urls = [];
 
@@ -493,7 +499,7 @@ export function parseGradle(
     prevTokensLength = tokens.length;
   }
 
-  return { deps, urls };
+  return { deps, urls, vars };
 }
 
 const propWord = '[a-zA-Z_][a-zA-Z0-9_]*(?:\\.[a-zA-Z_][a-zA-Z0-9_]*)*';