1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
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 */
|
