Add inputs 'update-toolchains-only', 'update-env-javahome', 'add-to-env-path'

Changes in detail:
------------------
- action.yml:
  - add inputs:
    - update-toolchains-only
    - update-env-javahome
    - add-to-env-path
  - update description for input "overwrite-settings"
  - remove default value of input "overwrite-settings",
    since the default is now propagated from input 'update-toolchains-only'

- base-models.ts:
  - extend interface JavaInstallerOptions:
    - add fields:
      - updateEnvJavaHome: boolean;
      - addToEnvPath: boolean;

- constants.ts:
  - add constant INPUT_UPDATE_TOOLCHAINS_ONLY
    = 'update-toolchains-only'

- auth.ts:
  - function configureAuthentication():
    - add parameter:
      - overwriteSettings: boolean
    - remove the now obsolete const overwriteSettings

- toolchains.ts:
  - function configureToolchains(...):
    - add parameter updateToolchains: boolean
    - remove the now obsolete const overwriteSettings
  - improve variable naming:
    - rename any occurrence of 'overwriteSettings'
        by 'updateToolchains'
    - add field updateToolchains: boolean to the parameter object
  - function writeToolchainsFileToDisk(...):
    - improve variable naming:
      - rename variable 'settingsExists'
          by 'toolchainsExists'
    - update wording of info logs to be more applicable

- setup-java.ts:
  - interface installerInputsOptions:
    - rename to IInstallerInputsOption to meet common coding convention
    - add fields:
      - updateToolchainsOnly: boolean;
      - overwriteSettings: boolean;
      - updateEnvJavaHome: boolean;
      - addToEnvPath: boolean;
  - function run():
    - add const:
      - const updateToolchainsOnly:
        - get as boolean from input 'update-toolchains-only', default: false
      - const overwriteSettings:
        - get as boolean from input 'overwrite-settings', default: !updateToolchainsOnly
      - const updateEnvJavaHome:
        - get as boolean input 'update-env-javahome', default: !updateToolchainsOnly
      - const addToEnvPath:
        - get as boolean input 'add-to-env-path', default: !updateToolchainsOnly
   - extend const installerInputsOptions to match with IInstallerInputsOption:
      - add field updateToolchainsOnly
      - add field overwriteSettings
      - add field updateEnvJavaHome
      - add field addToEnvPath
    - update call of auth.configureAuthentication()
        to auth.configureAuthentication(overwriteSettings)
  - function installVersion(...):
    - add const and init from parameter options:
      - updateToolchainsOnly, overwriteSettings,
        updateEnvJavaHome, addToEnvPath
    - init the additional fields of installerInputsOptions accordingly
    - call toolchains.configureToolchains(...):
      - with parameter updateToolchains= overwriteSettings || updateToolchainsOnly

- base-installer.ts:
  - add constants to import from constants:
    - INPUT_UPDATE_JAVA_HOME
    - INPUT_ADD_TO_PATH
  - add fields:
    - protected updateEnvJavaHome: boolean;
    - protected addToEnvPath: boolean;
  - ctor:
    - init these fields from JavaInstallerOptions accoprdingly
  - function setJavaDefault(...):
    - if updateEnvJavaHome is false:
      - SKIP updating env.JAVA_HOME
      - log info:
        `Skip updating env.JAVA_HOME according to ${INPUT_UPDATE_JAVA_HOME}`
    - if addToEnvPath is false:
      - SKIP adding toolchain path to env.PATH
      - log info:
        `Skip adding to env.PATH according to ${INPUT_ADD_TO_PATH}`

src/setup-java.ts

@@ -13,6 +13,19 @@ import * as path from 'path';
 import {getJavaDistribution} from './distributions/distribution-factory';
 import {JavaInstallerOptions} from './distributions/base-models';
 
+interface IInstallerInputsOptions {
+  architecture: string;
+  packageType: string;
+  checkLatest: boolean;
+  distributionName: string;
+  jdkFile: string;
+  toolchainIds: Array<string>;
+  updateToolchainsOnly: boolean;
+  overwriteSettings: boolean;
+  updateEnvJavaHome: boolean;
+  addToEnvPath: boolean;
+}
+
 async function run() {
   try {
     const versions = core.getMultilineInput(constants.INPUT_JAVA_VERSION);
@@ -28,6 +41,11 @@ async function run() {
       constants.INPUT_CACHE_DEPENDENCY_PATH
     );
     const checkLatest = getBooleanInput(constants.INPUT_CHECK_LATEST, false);
+    const updateToolchainsOnly = getBooleanInput(constants.INPUT_UPDATE_TOOLCHAINS_ONLY, false);
+    const overwriteSettings = getBooleanInput(constants.INPUT_OVERWRITE_SETTINGS, !updateToolchainsOnly);
+    const updateEnvJavaHome = getBooleanInput(constants.INPUT_UPDATE_JAVA_HOME, !updateToolchainsOnly);
+    const addToEnvPath = getBooleanInput(constants.INPUT_ADD_TO_PATH, !updateToolchainsOnly);
+
     let toolchainIds = core.getMultilineInput(constants.INPUT_MVN_TOOLCHAIN_ID);
 
     core.startGroup('Installed distributions');
@@ -40,13 +58,17 @@ async function run() {
       throw new Error('java-version or java-version-file input expected');
     }
 
-    const installerInputsOptions: installerInputsOptions = {
+    const installerInputsOptions: IInstallerInputsOptions = {
       architecture,
       packageType,
       checkLatest,
       distributionName,
       jdkFile,
-      toolchainIds
+      toolchainIds,
+      updateToolchainsOnly,
+      overwriteSettings,
+      updateEnvJavaHome,
+      addToEnvPath
     };
 
     if (!versions.length) {
@@ -78,7 +100,7 @@ async function run() {
     const matchersPath = path.join(__dirname, '..', '..', '.github');
     core.info(`##[add-matcher]${path.join(matchersPath, 'java.json')}`);
 
-    await auth.configureAuthentication();
+    await auth.configureAuthentication(overwriteSettings);
     if (cache && isCacheFeatureAvailable()) {
       await restore(cache, cacheDependencyPath);
     }
@@ -91,7 +113,7 @@ run();
 
 async function installVersion(
   version: string,
-  options: installerInputsOptions,
+  options: IInstallerInputsOptions,
   toolchainId = 0
 ) {
   const {
@@ -100,14 +122,20 @@ async function installVersion(
     architecture,
     packageType,
     checkLatest,
-    toolchainIds
+    toolchainIds,
+    updateToolchainsOnly,
+    overwriteSettings,
+    updateEnvJavaHome,
+    addToEnvPath
   } = options;
 
   const installerOptions: JavaInstallerOptions = {
+    version,
     architecture,
     packageType,
     checkLatest,
-    version
+    updateEnvJavaHome,
+    addToEnvPath
   };
 
   const distribution = getJavaDistribution(
@@ -126,6 +154,7 @@ async function installVersion(
     version,
     distributionName,
     result.path,
+    overwriteSettings || updateToolchainsOnly,
     toolchainIds[toolchainId]
   );
 
@@ -136,12 +165,3 @@ async function installVersion(
   core.info(`  Path: ${result.path}`);
   core.info('');
 }
-
-interface installerInputsOptions {
-  architecture: string;
-  packageType: string;
-  checkLatest: boolean;
-  distributionName: string;
-  jdkFile: string;
-  toolchainIds: Array<string>;
-}