Add Build.java to gitignore

.gitignore

@@ -126,5 +126,8 @@ _deps
 
 # End of https://www.toptal.com/developers/gitignore/api/cmake
 
+**/Build.java
+**/build/*
+
 *.a
 *.cmake

build.gradle

@@ -1,3 +1,7 @@
+import java.nio.file.Paths
+import java.time.LocalDateTime
+import java.time.format.DateTimeFormatter
+
 plugins {
     id 'java-library'
     id 'maven-publish'
@@ -41,4 +45,31 @@ repositories {
 dependencies {
     compileOnly "org.openpnp:opencv:4.5.1-2"
     api project(':RobotCore')
-}
+}
+
+task(writeBuildClassJava) {
+    String date = DateTimeFormatter.ofPattern("yyyy-M-d hh:mm:ss").format(LocalDateTime.now())
+
+    File versionFile = Paths.get(
+            projectDir.absolutePath, 'src', 'main', 'java',
+            'io', 'github', 'deltacv', 'apriltag', 'Build.java'
+    ).toFile()
+
+    versionFile.delete()
+
+    versionFile << "package io.github.deltacv.apriltag;\n" +
+            "\n" +
+            "/*\n" +
+            " * Autogenerated file! Do not manually edit this file, as\n" +
+            " * it is regenerated any time the build task is run.\n" +
+            " *\n" +
+            " * Based from PhotonVision PhotonVersion generator task\n"+
+            " */\n" +
+            "@SuppressWarnings(\"ALL\")\n" +
+            "public final class Build {\n" +
+            "    public static final String versionString = \"$version\";\n" +
+            "    public static final String buildDate = \"$date\";\n" +
+            "}"
+}
+
+build.dependsOn writeBuildClassJava

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
+distributionPath=wrapper/dists
 distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew.bat

@@ -1,89 +1,89 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-
-@if "%DEBUG%" == "" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Resolve any "." and ".." in APP_HOME to make it shorter.
-for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto execute
-
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto execute
-
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
-
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
-
-:end
-@rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

src/main/java/io/github/deltacv/apriltag/AprilTagLibLoader.java

@@ -70,16 +70,25 @@ public static void load() {
         String osArch = osName + " (" + arch + ")";
 
         String name = prefix + "apriltag" + extension;
+        String versionedName = Integer.toUnsignedString(Build.versionString.hashCode()) +  name;
 
         String tmpDir = System.getProperty("java.io.tmpdir");
-        File tempFile = new File(tmpDir + File.separator + "deltacv_apriltag_" + Math.random() + File.separator + name);
 
-        try {
-            Files.copy(Objects.requireNonNull(AprilTagLibLoader.class.getResourceAsStream("/" + name)), tempFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
-        } catch (NullPointerException e) {
-            throw new UnsupportedOperationException("Library could not be found for the " + osArch + " platform, AprilTag plugin is not supported. Tried " + name, e);
-        } catch (Exception e) {
-            throw new RuntimeException("Error while extracting library", e);
+        File tempDeltacv = new File(tmpDir + File.separator + "deltacv");
+        File tempFile = new File(tempDeltacv, versionedName);
+
+        if(!tempDeltacv.exists()) {
+            tempDeltacv.mkdir();
+        }
+
+        if(!tempFile.exists()) {
+            try {
+                Files.copy(Objects.requireNonNull(AprilTagLibLoader.class.getResourceAsStream("/" + name)), tempFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
+            } catch (NullPointerException e) {
+                throw new UnsupportedOperationException("Library could not be found for the " + osArch + " platform, AprilTag plugin is not supported. Tried " + name, e);
+            } catch (Exception e) {
+                throw new RuntimeException("Error while extracting library", e);
+            }
         }
 
         try {