/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* "find_java.exe", for Windows only.
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* Tries to find a Java binary in a variety of places and prints the
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* first one found on STDOUT and returns 0.
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*
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* If not found, returns error 1 with no message
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* (unless ANDROID_SDKMAN_DEBUG or -d if set, in which case there's a message on STDERR).
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*
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* Implementation details:
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* - We don't have access to ATL or MFC.
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* - We don't want to pull in things like STL.
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* - No Unicode/MBCS support for now.
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*
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* TODO for later version:
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* - provide an env variable to let users override which version is being used.
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* - if there's more than one java.exe found, enumerate them all.
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* - and in that case take the one with the highest Java version number.
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* - since that operation is expensive, do it only once and cache the result
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* in a temp file. If the temp file is not found or the java binary no
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* longer exists, re-run the enumaration.
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*/
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#ifdef _WIN32
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#include "utils.h"
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#include "find_java.h"
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#include <io.h>
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#include <fcntl.h>
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static int showHelpMessage() {
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printf(
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"Outputs the path of the first Java.exe found on the local system.\n"
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"Returns code 0 when found, 1 when not found.\n"
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"Options:\n"
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"-h / -help : This help.\n"
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"-t / -test : Internal test.\n"
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"-e / -error : Print an error message to the console if Java.exe isn't found.\n"
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"-j / -jdk : Only returns java.exe found in a JDK.\n"
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"-s / -short : Print path in short DOS form.\n"
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"-p / -path `dir` : A custom path to search first. Pass in JDK base dir if -j is set.\n"
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"-w / -javaw : Search a matching javaw.exe; defaults to java.exe if not found.\n"
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"-m / -minv # : Pass in a minimum version to use (default: 1.6).\n"
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"-v / -version: Only prints the Java version found.\n"
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);
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return 2;
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}
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static void printError(const char *message) {
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CString error;
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error.setLastWin32Error(message);
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printf(error.cstr());
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}
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static void testFindJava(bool isJdk, int minVersion) {
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CPath javaPath("<not found>");
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int v = findJavaInEnvPath(&javaPath, isJdk, minVersion);
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printf(" findJavaInEnvPath: [%d] %s\n", v, javaPath.cstr());
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javaPath.set("<not found>");
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v = findJavaInRegistry(&javaPath, isJdk, minVersion);
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printf(" findJavaInRegistry [%d] %s\n", v, javaPath.cstr());
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javaPath.set("<not found>");
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v = findJavaInProgramFiles(&javaPath, isJdk, minVersion);
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printf(" findJavaInProgramFiles [%d] %s\n", v, javaPath.cstr());
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}
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static void testFindJava(int minVersion) {
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printf("Searching for version %d.%d or newer...\n", JAVA_MAJOR(minVersion),
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JAVA_MINOR(minVersion));
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printf("\n");
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printf("Searching for any java.exe:\n");
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testFindJava(false, minVersion);
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printf("\n");
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printf("Searching for java.exe within a JDK:\n");
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testFindJava(true, minVersion);
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}
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// Returns 0 on failure or a java version on success.
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int parseMinVersionArg(char* arg) {
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int versionMajor = -1;
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int versionMinor = -1;
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if (sscanf(arg, "%d.%d", &versionMajor, &versionMinor) != 2) {
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// -m arg is malformatted
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return 0;
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}
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return TO_JAVA_VERSION(versionMajor, versionMinor);
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}
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int main(int argc, char* argv[]) {
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gIsConsole = true; // tell utils to to print errors to stderr
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gIsDebug = (getenv("ANDROID_SDKMAN_DEBUG") != NULL);
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bool doShortPath = false;
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bool doVersion = false;
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bool doJavaW = false;
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bool isJdk = false;
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bool shouldPrintError = false;
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int minVersion = MIN_JAVA_VERSION;
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const char *customPathStr = NULL;
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for (int i = 1; i < argc; i++) {
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if (strncmp(argv[i], "-t", 2) == 0) {
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testFindJava(minVersion);
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return 0;
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} else if (strncmp(argv[i], "-j", 2) == 0) {
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isJdk = true;
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} else if (strncmp(argv[i], "-e", 2) == 0) {
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shouldPrintError = true;
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} else if (strncmp(argv[i], "-p", 2) == 0) {
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i++;
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if (i == argc) {
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return showHelpMessage();
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}
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customPathStr = argv[i];
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} else if (strncmp(argv[i], "-d", 2) == 0) {
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gIsDebug = true;
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} else if (strncmp(argv[i], "-s", 2) == 0) {
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doShortPath = true;
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} else if (strncmp(argv[i], "-v", 2) == 0) {
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doVersion = true;
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} else if (strncmp(argv[i], "-m", 2) == 0) {
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i++;
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if (i == argc ||
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((minVersion = parseMinVersionArg(argv[i])) == 0)) {
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return showHelpMessage();
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}
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}
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else if (strcmp(argv[i], "-w") == 0 || strcmp(argv[i], "-javaw") == 0) {
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doJavaW = true;
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}
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else {
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return showHelpMessage();
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}
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}
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// Find the first suitable version of Java we can use.
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CPath javaPath;
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int version = 0;
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if (customPathStr != NULL) {
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CPath customPath(customPathStr);
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version = findJavaInPath(customPath, &javaPath, isJdk, minVersion);
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}
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if (version == 0) {
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version = findJavaInEnvPath(&javaPath, isJdk, minVersion);
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}
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if (version == 0) {
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version = findJavaInRegistry(&javaPath, isJdk, minVersion);
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}
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if (version == 0) {
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version = findJavaInProgramFiles(&javaPath, isJdk, minVersion);
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}
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if (version == 0) {
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CString s;
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s.setf("Failed to find Java %d.%d (or newer) on your system. ", JAVA_MAJOR(minVersion),
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JAVA_MINOR(minVersion));
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if (gIsDebug) {
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fprintf(stderr, s.cstr());
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}
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if (shouldPrintError) {
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printError(s.cstr());
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}
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return 1;
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}
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_ASSERT(!javaPath.isEmpty());
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if (doShortPath) {
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if (!javaPath.toShortPath(&javaPath)) {
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CString s;
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s.setf("Failed to convert path (%s) to a short DOS path. ", javaPath.cstr());
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fprintf(stderr, s.cstr());
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if (shouldPrintError) {
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printError(s.cstr());
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}
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return 1;
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}
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}
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if (doVersion) {
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// Print version found. We already have the version as an integer
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// so we don't need to run java -version a second time.
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printf("%d.%d", JAVA_MAJOR(version), JAVA_MINOR(version));
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return 0;
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}
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if (doJavaW) {
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// Try to find a javaw.exe instead of java.exe at the same location.
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CPath javawPath(javaPath);
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javawPath.replaceName("java.exe", "javaw.exe");
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// Only accept it if we can actually find the exec
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if (javawPath.fileExists()) {
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javaPath.set(javawPath.cstr());
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}
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}
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// Print java.exe path found
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printf(javaPath.cstr());
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return 0;
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}
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#endif /* _WIN32 */
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