diff options
Diffstat (limited to 'find_java/src/source/find_java_exe.cpp')
| -rw-r--r-- | find_java/src/source/find_java_exe.cpp | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/find_java/src/source/find_java_exe.cpp b/find_java/src/source/find_java_exe.cpp new file mode 100644 index 000000000..a8be377ef --- /dev/null +++ b/find_java/src/source/find_java_exe.cpp @@ -0,0 +1,237 @@ +/*
+ * 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 */
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