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Copy pathfindJavaRuntimes.ts
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353 lines (321 loc) · 11.2 KB
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
import * as cp from "child_process";
import * as fse from "fs-extra";
import * as _ from "lodash";
import * as os from "os";
import * as path from "path";
const expandHomeDir = require("expand-home-dir");
const WinReg = require("winreg-utf8");
const isWindows: boolean = process.platform.indexOf("win") === 0;
const isMac: boolean = process.platform.indexOf("darwin") === 0;
const isLinux: boolean = process.platform.indexOf("linux") === 0;
const JAVAC_FILENAME = "javac" + (isWindows ? ".exe" : "");
const JAVA_FILENAME = "java" + (isWindows ? ".exe" : "");
export interface JavaRuntime {
home: string;
version: number;
sources: string[];
}
/**
* return metadata for all installed JDKs.
*/
export async function findJavaHomes(): Promise<JavaRuntime[]> {
const ret: JavaRuntime[] = [];
const jdkMap = new Map<string, string[]>();
updateJDKs(jdkMap, await fromEnv("JDK_HOME"), "env.JDK_HOME");
updateJDKs(jdkMap, await fromEnv("JAVA_HOME"), "env.JAVA_HOME");
updateJDKs(jdkMap, await fromPath(), "env.PATH");
updateJDKs(jdkMap, await fromWindowsRegistry(), "WindowsRegistry");
updateJDKs(jdkMap, await fromCommonPlaces(), "DefaultLocation");
for (const elem of jdkMap) {
const home = elem[0];
const sources = elem[1];
const version = await getJavaVersion(home);
if (version) {
ret.push({
home,
sources,
version
});
} else {
console.warn(`Unknown version of JDK ${home}`);
}
}
return ret;
}
function updateJDKs(map: Map<string, string[]>, newJdks: string[], source: string) {
for (const newJdk of newJdks) {
const sources = map.get(newJdk);
if (sources !== undefined) {
map.set(newJdk, [...sources, source]);
} else {
map.set(newJdk, [source]);
}
}
}
async function fromEnv(name: string): Promise<string[]> {
const ret: string[] = [];
if (process.env[name]) {
const javaHome = await verifyJavaHome(process.env[name], JAVAC_FILENAME);
if (javaHome) {
ret.push(javaHome);
}
}
return ret;
}
async function fromPath(): Promise<string[]> {
const ret: string[] = [];
const paths = process.env.PATH ? process.env.PATH.split(path.delimiter).filter(Boolean) : [];
for (const p of paths) {
const proposed = path.dirname(p); // remove "bin"
const javaHome = await verifyJavaHome(proposed, JAVAC_FILENAME);
if (javaHome) {
ret.push(javaHome);
}
if (isMac) {
let dir = expandHomeDir(p);
dir = await findLinkedFile(dir);
// on mac, java install has a utility script called java_home
const macUtility = path.join(dir, "java_home");
if (await fse.pathExists(macUtility)) {
let buffer;
try {
buffer = cp.execSync(macUtility, { cwd: dir });
const absoluteJavaHome = "" + buffer.toString().replace(/\n$/, "");
const verified = await verifyJavaHome(absoluteJavaHome, JAVAC_FILENAME);
if (verified) {
ret.push(absoluteJavaHome);
}
} catch (error) {
// do nothing
}
}
}
}
if (isMac) {
// Exclude /usr, because in macOS Big Sur /usr/bin/javac is no longer symlink.
// See https://github.com/redhat-developer/vscode-java/issues/1700#issuecomment-729478810
return ret.filter(item => item !== "/usr");
} else {
return ret;
}
}
async function fromWindowsRegistry(): Promise<string[]> {
if (!isWindows) {
return [];
}
const keyPaths: string[] = [
"\\SOFTWARE\\JavaSoft\\JDK",
"\\SOFTWARE\\JavaSoft\\Java Development Kit"
];
const promisifyFindPossibleRegKey = (keyPath: string, regArch: string): Promise<Winreg.Registry[]> => {
return new Promise<Winreg.Registry[]>((resolve) => {
const winreg: Winreg.Registry = new WinReg({
hive: WinReg.HKLM,
key: keyPath,
arch: regArch
});
winreg.keys((err, result) => {
if (err) {
return resolve([]);
}
resolve(result);
});
});
};
const promisifyFindJavaHomeInRegKey = (reg: Winreg.Registry): Promise<string | null> => {
return new Promise<string | null>((resolve) => {
reg.get("JavaHome", (err, home) => {
if (err || !home) {
return resolve(null);
}
resolve(home.value);
});
});
};
const promises = [];
for (const arch of ["x64", "x86"]) {
for (const keyPath of keyPaths) {
promises.push(promisifyFindPossibleRegKey(keyPath, arch));
}
}
const keysFoundSegments: Winreg.Registry[][] = await Promise.all(promises);
const keysFound: Winreg.Registry[] = Array.prototype.concat.apply([], keysFoundSegments);
if (!keysFound.length) {
return [];
}
const sortedKeysFound = keysFound.sort((a, b) => {
const aVer = parseFloat(a.key);
const bVer = parseFloat(b.key);
return bVer - aVer;
});
const javaHomes: string[] = [];
for (const key of sortedKeysFound) {
const candidate = await promisifyFindJavaHomeInRegKey(key);
if (candidate) {
javaHomes.push(candidate);
}
}
const ret: string[] = [];
for (const proposed of javaHomes) {
const javaHome = await verifyJavaHome(proposed, JAVAC_FILENAME);
if (javaHome) {
ret.push(javaHome);
}
}
return ret;
}
async function fromCommonPlaces(): Promise<string[]> {
const ret: string[] = [];
// common place for mac
if (isMac) {
const jvmStore = "/Library/Java/JavaVirtualMachines";
const subfolder = "Contents/Home";
let jvms: string[] = [];
try {
jvms = await fse.readdir(jvmStore);
} catch (error) {
// ignore
}
for (const jvm of jvms) {
const proposed = path.join(jvmStore, jvm, subfolder);
const javaHome = await verifyJavaHome(proposed, JAVAC_FILENAME);
if (javaHome) {
ret.push(javaHome);
}
}
}
// common place for Windows
if (isWindows) {
const localAppDataFolder = process.env.LOCALAPPDATA ? process.env.LOCALAPPDATA : path.join(os.homedir(), "AppData", "Local");
const possibleLocations: string[] = [
process.env.ProgramFiles && path.join(process.env.ProgramFiles, "Java"), // Oracle JDK per machine
process.env.ProgramW6432 && path.join(process.env.ProgramW6432, "Java"), // Oracle JDK per machine
process.env.ProgramFiles && path.join(process.env.ProgramFiles, "AdoptOpenJDK"), // AdoptOpenJDK per machine
process.env.ProgramW6432 && path.join(process.env.ProgramW6432, "AdoptOpenJDK"), // AdoptOpenJDK per machine
path.join(localAppDataFolder, "Programs", "AdoptOpenJDK"), // AdoptOpenJDK per user
].filter(Boolean) as string[];
const jvmStores = _.uniq(possibleLocations);
for (const jvmStore of jvmStores) {
let jvms: string[] = [];
try {
jvms = await fse.readdir(jvmStore);
} catch (error) {
// ignore
}
for (const jvm of jvms) {
const proposed = path.join(jvmStore, jvm);
const javaHome = await verifyJavaHome(proposed, JAVAC_FILENAME);
if (javaHome) {
ret.push(javaHome);
}
}
}
}
// common place for Linux
if (isLinux) {
const jvmStore = "/usr/lib/jvm";
let jvms: string[] = [];
try {
jvms = await fse.readdir(jvmStore);
} catch (error) {
// ignore
}
for (const jvm of jvms) {
const proposed = path.join(jvmStore, jvm);
const javaHome = await verifyJavaHome(proposed, JAVAC_FILENAME);
if (javaHome) {
ret.push(javaHome);
}
}
}
return ret;
}
export async function verifyJavaHome(raw: string, javaFilename: string): Promise<string | undefined> {
const dir = expandHomeDir(raw);
const targetJavaFile = await findLinkedFile(path.resolve(dir, "bin", javaFilename));
const proposed = path.dirname(path.dirname(targetJavaFile));
if (await fse.pathExists(proposed)
&& await fse.pathExists(path.resolve(proposed, "bin", javaFilename))
) {
return proposed;
}
return undefined;
}
// iterate through symbolic links until file is found
async function findLinkedFile(file: string): Promise<string> {
if (!await fse.pathExists(file) || !(await fse.lstat(file)).isSymbolicLink()) {
return file;
}
return await findLinkedFile(await fse.readlink(file));
}
export async function getJavaVersion(javaHome: string): Promise<number | undefined> {
let javaVersion = await checkVersionInReleaseFile(javaHome);
if (!javaVersion) {
javaVersion = await checkVersionByCLI(javaHome);
}
return javaVersion;
}
export function parseMajorVersion(version: string): number {
if (!version) {
return 0;
}
// Ignore '1.' prefix for legacy Java versions
if (version.startsWith("1.")) {
version = version.substring(2);
}
// look into the interesting bits now
const regexp = /\d+/g;
const match = regexp.exec(version);
let javaVersion = 0;
if (match) {
javaVersion = parseInt(match[0]);
}
return javaVersion;
}
/**
* Get version by checking file JAVA_HOME/release
*/
async function checkVersionInReleaseFile(javaHome: string): Promise<number> {
if (!javaHome) {
return 0;
}
const releaseFile = path.join(javaHome, "release");
if (!await fse.pathExists(releaseFile)) {
return 0;
}
try {
const content = await fse.readFile(releaseFile);
const regexp = /^JAVA_VERSION="(.*)"/gm;
const match = regexp.exec(content.toString());
if (!match) {
return 0;
}
const majorVersion = parseMajorVersion(match[1]);
return majorVersion;
} catch (error) {
// ignore
}
return 0;
}
/**
* Get version by parsing `JAVA_HOME/bin/java -version`
*/
async function checkVersionByCLI(javaHome: string): Promise<number> {
if (!javaHome) {
return 0;
}
return new Promise((resolve, reject) => {
const javaBin = path.join(javaHome, "bin", JAVA_FILENAME);
cp.execFile(javaBin, ["-version"], {}, (error, stdout, stderr) => {
const regexp = /version "(.*)"/g;
const match = regexp.exec(stderr);
if (!match) {
return resolve(0);
}
const javaVersion = parseMajorVersion(match[1]);
resolve(javaVersion);
});
});
}
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