Windows: "find_java" exe and lib for android.bat
This adds a "find_java.exe" that will be packages
in SDK/tools/lib. It will be used by android.bat
and the other launchers to locate the best version
of java to use for our tools (currently we have
a find_java.bat that uses DOS commands to achieve
something similar but more limited).
In addition this creates a static "findjavalib"
that is used by the NSIS installer to locate
java and get its version (to complain in case we
only find a Java 1.4 or lesser). The goal is for
the installer to use the same logic as the tools
will use to locate the java binary.
Change-Id: Ic2efb388135087bab9687c3332882047fd041b1c
diff --git a/find_java/find_java_exe.cpp b/find_java/find_java_exe.cpp
new file mode 100644
index 0000000..74f8ac1
--- /dev/null
+++ b/find_java/find_java_exe.cpp
@@ -0,0 +1,133 @@
+/*
+ * 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 void testFindJava() {
+
+ CPath javaPath("<not found>");
+ bool ok = findJavaInEnvPath(&javaPath);
+ printf("findJavaInEnvPath: [%s] %s\n", ok ? "OK" : "FAIL", javaPath.cstr());
+
+ javaPath.set("<not found>");
+ ok = findJavaInRegistry(&javaPath);
+ printf("findJavaInRegistry [%s] %s\n", ok ? "OK" : "FAIL", javaPath.cstr());
+
+ javaPath.set("<not found>");
+ ok = findJavaInProgramFiles(&javaPath);
+ printf("findJavaInProgramFiles [%s] %s\n", ok ? "OK" : "FAIL", javaPath.cstr());
+}
+
+
+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;
+
+ for (int i = 1; i < argc; i++) {
+ if (strncmp(argv[i], "-t", 2) == 0) {
+ testFindJava();
+ return 0;
+
+ } 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 {
+ 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"
+ "-s / -short : Print path in short DOS form.\n"
+ "-v / -version: Only prints the Java version found.\n"
+ );
+ return 2;
+ }
+ }
+
+ CPath javaPath;
+ if (!findJavaInEnvPath(&javaPath) &&
+ !findJavaInRegistry(&javaPath) &&
+ !findJavaInProgramFiles(&javaPath)) {
+ if (gIsDebug) {
+ fprintf(stderr, "Failed to find Java on your system.\n");
+ }
+ return 1;
+ }
+ _ASSERT(!javaPath.isEmpty());
+
+ if (doShortPath) {
+ if (!javaPath.toShortPath(&javaPath)) {
+ fprintf(stderr,
+ "Failed to convert path to a short DOS path: %s\n",
+ javaPath.cstr());
+ return 1;
+ }
+ }
+
+ if (doVersion) {
+ // Print version found
+ CString version;
+ if (getJavaVersion(javaPath, &version)) {
+ printf("%s", version.cstr());
+ return 0;
+ } else {
+ fprintf(stderr, "Failed to get version of %s\n", javaPath.cstr());
+ }
+ }
+
+ // Print java.exe path found
+ printf("%s", javaPath.cstr());
+ return 0;
+}
+
+#endif /* _WIN32 */