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wpilibj/src/main/java/org/wpilib/system/Filesystem.java

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+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+package edu.wpi.first.wpilibj;
+
+import java.io.File;
+
+/**
+ * Class for interacting with the Filesystem, particularly, interacting with FRC-related paths on
+ * the system, such as the launch and deploy directories.
+ *
+ * <p>This class is primarily used for obtaining resources in src/main/deploy, and the systemcore
+ * path /home/systemcore in a simulation-compatible way.
+ */
+public final class Filesystem {
+  private Filesystem() {}
+
+  /**
+   * Obtains the current working path that the program was launched with. This is analogous to the
+   * `pwd` command on unix.
+   *
+   * @return The current working directory (launch directory)
+   */
+  public static File getLaunchDirectory() {
+    // workaround for
+    // https://www.chiefdelphi.com/t/filesystem-getdeploydirectory-returning-wrong-location-how-to-fix/427292
+    String path =
+        System.getProperty("user.dir")
+            .replace(
+                File.separator + "build" + File.separator + "jni" + File.separator + "release", "");
+    return new File(path).getAbsoluteFile();
+  }
+
+  /**
+   * Obtains the operating directory of the program. On the systemcore, this is /home/systemcore. In
+   * simulation, it is where the simulation was launched from (`pwd`).
+   *
+   * @return The operating directory
+   */
+  public static File getOperatingDirectory() {
+    if (!RobotBase.isSimulation()) {
+      return new File("/home/systemcore");
+    } else {
+      return getLaunchDirectory();
+    }
+  }
+
+  /**
+   * Obtains the 'deploy' directory of the program, located at src/main/deploy, which is deployed by
+   * default. On the systemcore, this is /home/systemcore/deploy. In simulation, it is where the
+   * simulation was launched from, in the subdirectory "src/main/deploy" (`pwd`/src/main/deploy).
+   *
+   * @return The 'deploy' directory
+   */
+  public static File getDeployDirectory() {
+    if (!RobotBase.isSimulation()) {
+      return new File(getOperatingDirectory(), "deploy");
+    } else {
+      return new File(
+          getOperatingDirectory(), "src" + File.separator + "main" + File.separator + "deploy");
+    }
+  }
+}