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