WIP: server-side scripting gets a home directory.

src/main/java/caosdb/server/scripting/ServerSideScriptingCaller.java

@@ -56,6 +56,7 @@ public class ServerSideScriptingCaller {
   private ScriptingUtils utils;
   private List<FileProperties> files;
   private File workingDir;
+  private File tmpHome;
   private File sharedDir;
   private Object authToken;
   private Map<String, String> env;
@@ -112,6 +113,7 @@ public class ServerSideScriptingCaller {
     this.authToken = authToken;
     this.env = env;
     this.workingDir = workingDir;
+    this.tmpHome = new File(getTmpWorkingDir(), "temphome");
     this.stdOutFile = utils.getStdOutFile(workingDir);
     this.stdErrFile = utils.getStdErrFile(workingDir);
   }
@@ -124,6 +126,7 @@ public class ServerSideScriptingCaller {
         createWorkingDir();
         putFilesInWorkingDir(files);
         createSharedDir();
+        createTmpHomeDir();
         updateEnvironment();
       } catch (final Exception e) {
         e.printStackTrace();
@@ -173,27 +176,44 @@ public class ServerSideScriptingCaller {
     }
 
     // create working dir
-    getTmpWorkingDir().mkdirs();
+    if (!getTmpWorkingDir().mkdirs()) {
+      throw new Exception("Creating the temporary working dir failed.");
     }
-
-  /** Creates a temporary directory for shareing by the script and sets `sharedDir` accordingly. */
-  void createSharedDir() throws Exception {
-    sharedDir = new File(FileSystem.assertDir(null));
   }
 
-  /** Sets environment variables for the script, according to the current state of the caller. */
-  void updateEnvironment() throws Exception {
-    env.put("SHARED_DIR", sharedDir.toString());
-    // Writable "home like" directory, needed for some Python libs, e.g. caosdb-pylib.)
-    File tmpHome = new File(getTmpWorkingDir(), "temphome");
-    if (!tmpHome.mkdir()) {
+  /**
+   * Create a writable "home like" directory, needed for some Python libs, e.g. caosdb-pylib.
+   *
+   * <p>The temporary working directory must exist when this method is called.
+   */
+  void createTmpHomeDir() throws Exception {
+    if (!getTmpWorkingDir().exists()) {
+      throw new Exception(
+          "The temp working dir ("
+              + getTmpWorkingDir().toString()
+              + ") must exist before the home dir can be created.");
+    }
+    if (getTmpHomeDir().exists()) {
+      throw new Exception("The home directory must be non-existing when the caller is invoked.");
+    }
+    if (!this.tmpHome.mkdir()) {
       throw new Exception("Creating the temporary home dir failed.");
     }
     try {
-      Files.copy(Paths.get("~/.pycaosdb.ini"), tmpHome.toPath());
+      Files.copy(Paths.get("~/.pycaosdb.ini"), this.tmpHome.toPath());
     } catch (IOException e) {
       System.out.println("No pycaosdb.info found");
     }
+  }
+
+  /** Creates a temporary directory for sharing by the script and sets `sharedDir` accordingly. */
+  void createSharedDir() throws Exception {
+    sharedDir = new File(FileSystem.assertDir(null));
+  }
+
+  /** Sets environment variables for the script, according to the current state of the caller. */
+  void updateEnvironment() throws Exception {
+    env.put("SHARED_DIR", sharedDir.toString());
     env.put("HOME", tmpHome.toString());
   }
 
@@ -276,6 +296,10 @@ public class ServerSideScriptingCaller {
     return this.workingDir;
   }
 
+  File getTmpHomeDir() {
+    return this.tmpHome;
+  }
+
   File getSharedDir() {
     return this.sharedDir;
   }

src/test/java/caosdb/server/scripting/TestServerSideScriptingCaller.java

@@ -492,6 +492,9 @@ public class TestServerSideScriptingCaller extends CaosDBTestClass {
           public void putFilesInWorkingDir(final Collection<FileProperties> files)
               throws FileNotFoundException, CaosDBException {}
 
+          @Override
+          public void createTmpHomeDir() throws Exception {}
+
           @Override
           public int callScript() throws IOException {
             throw new IOException();