feat(gradle): Use centralized docker execution (#5231)

lib/manager/gradle/__snapshots__/index.spec.ts.snap

@@ -532,7 +532,7 @@ Array [
 exports[`manager/gradle extractPackageFile should use docker even if gradlew is available 1`] = `
 Array [
   Object {
-    "cmd": "docker run --rm -v \\"localDir\\":\\"localDir\\" -w \\"localDir\\" renovate/gradle gradle --init-script renovate-plugin.gradle renovate",
+    "cmd": "docker run --rm -v \\"localDir\\":\\"localDir\\" -w \\"localDir\\" renovate/gradle bash -l -c \\"gradle --init-script renovate-plugin.gradle renovate\\"",
     "options": Object {
       "cwd": "localDir",
       "encoding": "utf-8",
@@ -554,7 +554,13 @@ Array [
 exports[`manager/gradle extractPackageFile should use docker if required 1`] = `
 Array [
   Object {
-    "cmd": "docker run --rm -v \\"localDir\\":\\"localDir\\" -w \\"localDir\\" renovate/gradle gradle --init-script renovate-plugin.gradle renovate",
+    "cmd": "docker pull renovate/gradle",
+    "options": Object {
+      "encoding": "utf-8",
+    },
+  },
+  Object {
+    "cmd": "docker run --rm -v \\"localDir\\":\\"localDir\\" -w \\"localDir\\" renovate/gradle bash -l -c \\"gradle --init-script renovate-plugin.gradle renovate\\"",
     "options": Object {
       "cwd": "localDir",
       "encoding": "utf-8",

lib/manager/gradle/index.spec.ts

@@ -8,6 +8,7 @@ import { envMock, mockExecAll } from '../../../test/execUtil';
 import * as _env from '../../util/exec/env';
 import { mocked } from '../../../test/util';
 import { BinarySource } from '../../util/exec/common';
+import { setUtilConfig } from '../../util';
 
 jest.mock('fs-extra');
 jest.mock('child_process');
@@ -47,6 +48,7 @@ describe('manager/gradle', () => {
     platform.getFile.mockResolvedValue('some content');
 
     env.getChildProcessEnv.mockReturnValue(envMock.basic);
+    setUtilConfig(config);
   });
 
   describe('extractPackageFile', () => {
@@ -192,6 +194,7 @@ describe('manager/gradle', () => {
     });
 
     it('should use docker if required', async () => {
+      setUtilConfig({ ...config, binarySource: BinarySource.Docker });
       const execSnapshots = mockExecAll(exec, gradleOutput);
 
       const configWithDocker = {
@@ -200,11 +203,11 @@ describe('manager/gradle', () => {
       };
       await manager.extractAllPackageFiles(configWithDocker, ['build.gradle']);
 
-      expect(exec.mock.calls[0][0].includes('docker run')).toBe(true);
       expect(execSnapshots).toMatchSnapshot();
     });
 
     it('should use docker even if gradlew is available', async () => {
+      setUtilConfig({ ...config, binarySource: BinarySource.Docker });
       const execSnapshots = mockExecAll(exec, gradleOutput);
 
       const configWithDocker = {
@@ -214,7 +217,6 @@ describe('manager/gradle', () => {
       };
       await manager.extractAllPackageFiles(configWithDocker, ['build.gradle']);
 
-      expect(exec.mock.calls[0][0].includes('docker run')).toBe(true);
       expect(execSnapshots).toMatchSnapshot();
     });
   });

lib/manager/gradle/index.ts

@@ -1,7 +1,7 @@
 import { access, constants, exists } from 'fs-extra';
 import upath from 'upath';
 
-import { exec } from '../../util/exec';
+import { exec, ExecOptions } from '../../util/exec';
 import { logger } from '../../logger';
 import { DATASOURCE_FAILURE } from '../../constants/error-messages';
 import { VERSION_SCHEME_MAVEN } from '../../constants/version-schemes';
@@ -44,27 +44,17 @@ async function getGradleCommandLine(
   config: ExtractConfig,
   cwd: string
 ): Promise<string> {
-  let cmd: string;
+  const args = GRADLE_DEPENDENCY_REPORT_OPTIONS;
+
+  if (config.binarySource === BinarySource.Docker) return `gradle ${args}`;
+
   const gradlewPath = upath.join(cwd, 'gradlew');
   const gradlewExists = await exists(gradlewPath);
   const gradlewExecutable = gradlewExists && (await canExecute(gradlewPath));
+  if (gradlewExecutable) return `./gradlew ${args}`;
+  if (gradlewExists) return `sh gradlew ${args}`;
 
-  if (config.binarySource === BinarySource.Docker) {
-    cmd = `docker run --rm `;
-    // istanbul ignore if
-    if (config.dockerUser) {
-      cmd += `--user=${config.dockerUser} `;
-    }
-    cmd += `-v "${cwd}":"${cwd}" -w "${cwd}" `;
-    cmd += `renovate/gradle gradle`;
-  } else if (gradlewExecutable) {
-    cmd = './gradlew';
-  } else if (gradlewExists) {
-    cmd = 'sh gradlew';
-  } else {
-    cmd = 'gradle';
-  }
-  return cmd + ' ' + GRADLE_DEPENDENCY_REPORT_OPTIONS;
+  return `gradle ${args}`;
 }
 
 async function executeGradle(
@@ -73,17 +63,21 @@ async function executeGradle(
 ): Promise<void> {
   let stdout: string;
   let stderr: string;
-  const gradleTimeout =
+  const timeout =
     config.gradle && config.gradle.timeout
       ? config.gradle.timeout * 1000
       : undefined;
   const cmd = await getGradleCommandLine(config, cwd);
+  const execOptions: ExecOptions = {
+    timeout,
+    cwd,
+    docker: {
+      image: 'renovate/gradle',
+    },
+  };
   try {
     logger.debug({ cmd }, 'Start gradle command');
-    ({ stdout, stderr } = await exec(cmd, {
-      cwd,
-      timeout: gradleTimeout,
-    }));
+    ({ stdout, stderr } = await exec(cmd, execOptions));
   } catch (err) {
     // istanbul ignore if
     if (err.code === TIMEOUT_CODE) {