Added automatic mode selection

README.md

@@ -80,86 +80,59 @@ The language can either be set with the -l parameter or as a subcommand (`jplag
 Language-specific arguments can be set when using the subcommand. A list of language-specific options can be obtained by requesting the help page of a subcommand (e.g., `jplag java —h`).
 
 ```
-Parameter descriptions: 
+Parameter descriptions:
       [root-dirs[,root-dirs...]...]
-                        Root-directory with submissions to check for
-                          plagiarism. If mode is set to VIEW, this parameter
-                          can be used to specify a file to open. In that case
-                          only a single file may be specified.
+                        Root-directory with submissions to check for plagiarism. If mode is set to VIEW, this parameter can be used to specify a report file to open. In that
+                          case only a single file may be specified.
       -bc, --bc, --base-code=<baseCode>
-                        Path to the base code directory (common framework used
-                          in all submissions).
-      -l, --language=<language>
-                        Select the language of the submissions (default: java).
-                          See subcommands below.
-      -M, --mode=<{RUN, VIEW, RUN_AND_VIEW}>
-                        The mode of JPlag. If VIEW is chosen, you can specify a
-                          result file to display. One of: RUN, VIEW,
-                          RUN_AND_VIEW (default: null)
-      -n, --shown-comparisons=<shownComparisons>
-                        The maximum number of comparisons that will be shown in
-                          the generated report, if set to -1 all comparisons
-                          will be shown (default: 2500)
+                        Path to the base code directory (common framework used in all submissions).
+  -l, --language=<language>
+                        Select the language of the submissions (default: java). See subcommands below.
+  -M, --mode=<{RUN, VIEW, RUN_AND_VIEW, AUTO}>
+                        The mode of JPlag. One of: RUN, VIEW, RUN_AND_VIEW, AUTO (default: null). If VIEW is chosen, you can optionally specify a path to an existing report.
+  -n, --shown-comparisons=<shownComparisons>
+                        The maximum number of comparisons that will be shown in the generated report, if set to -1 all comparisons will be shown (default: 2500)
       -new, --new=<newDirectories>[,<newDirectories>...]
-                        Root-directories with submissions to check for
-                          plagiarism (same as root).
-      --normalize       Activate the normalization of tokens. Supported for
-                          languages: Java, C++.
+                        Root-directories with submissions to check for plagiarism (same as root).
+      --normalize       Activate the normalization of tokens. Supported for languages: Java, C++.
       -old, --old=<oldDirectories>[,<oldDirectories>...]
-                        Root-directories with prior submissions to compare
-                          against.
-      -r, --result-file=<resultFile>
-                        Name of the file in which the comparison results will
-                          be stored (default: results). Missing .zip endings
-                          will be automatically added.
-      -t, --min-tokens=<minTokenMatch>
-                        Tunes the comparison sensitivity by adjusting the
-                          minimum token required to be counted as a matching
-                          section. A smaller value increases the sensitivity
-                          but might lead to more false-positives.
+                        Root-directories with prior submissions to compare against.
+  -r, --result-file=<resultFile>
+                        Name of the file in which the comparison results will be stored (default: results). Missing .zip endings will be automatically added.
+  -t, --min-tokens=<minTokenMatch>
+                        Tunes the comparison sensitivity by adjusting the minimum token required to be counted as a matching section. A smaller value increases the
+                          sensitivity but might lead to more false-positives.
 
 Advanced
       --csv-export      Export pairwise similarity values as a CSV file.
-      -d, --debug           Store on-parsable files in error folder.
+  -d, --debug           Store on-parsable files in error folder.
       --log-level=<{ERROR, WARN, INFO, DEBUG, TRACE}>
                         Set the log level for the cli.
-      -m, --similarity-threshold=<similarityThreshold>
-                        Comparison similarity threshold [0.0-1.0]: All
-                          comparisons above this threshold will be saved
-                          (default: 0.0).
+  -m, --similarity-threshold=<similarityThreshold>
+                        Comparison similarity threshold [0.0-1.0]: All comparisons above this threshold will be saved (default: 0.0).
       --overwrite       Existing result files will be overwritten.
-      -p, --suffixes=<suffixes>[,<suffixes>...]
-                        comma-separated list of all filename suffixes that are
-                          included.
-      -P, --port=<port>     The port used for the internal report viewer (default:
-                          1996).
-      -s, --subdirectory=<subdirectory>
+  -p, --suffixes=<suffixes>[,<suffixes>...]
+                        comma-separated list of all filename suffixes that are included.
+  -P, --port=<port>     The port used for the internal report viewer (default: 1996).
+  -s, --subdirectory=<subdirectory>
                         Look in directories <root-dir>/*/<dir> for programs.
-      -x, --exclusion-file=<exclusionFileName>
-                        All files named in this file will be ignored in the
-                          comparison (line-separated list).
+  -x, --exclusion-file=<exclusionFileName>
+                        All files named in this file will be ignored in the comparison (line-separated list).
 
 Clustering
       --cluster-alg, --cluster-algorithm=<{AGGLOMERATIVE, SPECTRAL}>
-                        Specifies the clustering algorithm. Available
-                          algorithms: agglomerative, spectral (default:
-                          spectral).
+                        Specifies the clustering algorithm. Available algorithms: agglomerative, spectral (default: spectral).
       --cluster-metric=<{AVG, MIN, MAX, INTERSECTION}>
-                        The similarity metric used for clustering. Available
-                          metrics: average similarity, minimum similarity,
-                          maximal similarity, matched tokens (default: average
-                          similarity).
+                        The similarity metric used for clustering. Available metrics: average similarity, minimum similarity, maximal similarity, matched tokens (default:
+                          average similarity).
       --cluster-skip    Skips the cluster calculation.
 
 Subsequence Match Merging
       --gap-size=<maximumGapSize>
-                        Maximal gap between neighboring matches to be merged
-                          (between 1 and minTokenMatch, default: 6).
-      --match-merging   Enables merging of neighboring matches to counteract
-                          obfuscation attempts.
+                        Maximal gap between neighboring matches to be merged (between 1 and minTokenMatch, default: 6).
+      --match-merging   Enables merging of neighboring matches to counteract obfuscation attempts.
       --neighbor-length=<minimumNeighborLength>
-                        Minimal length of neighboring matches to be merged
-                          (between 1 and minTokenMatch, default: 2).
+                        Minimal length of neighboring matches to be merged (between 1 and minTokenMatch, default: 2).
 Languages:
   c
   cpp
@@ -171,6 +144,7 @@ Languages:
   javascript
   kotlin
   llvmir
+  multi
   python3
   rlang
   rust

cli/src/main/java/de/jplag/cli/CLI.java

@@ -3,6 +3,8 @@
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
 
 import org.slf4j.ILoggerFactory;
 import org.slf4j.Logger;
@@ -32,6 +34,8 @@ public final class CLI {
     private static final String OUTPUT_FILE_EXISTS = "The output file (also with suffixes e.g. results(1).zip) already exists. You can use --overwrite to overwrite the file.";
     private static final String OUTPUT_FILE_NOT_WRITABLE = "The output file (%s) cannot be written to.";
 
+    private static final String ZIP_FILE_EXTENSION = ".zip";
+
     private final CliInputHandler inputHandler;
 
     /**
@@ -58,7 +62,8 @@ public void executeCli() throws ExitException, IOException {
             switch (this.inputHandler.getCliOptions().mode) {
                 case RUN -> runJPlag();
                 case VIEW -> runViewer(this.inputHandler.getFileForViewMode());
-                case RUN_AND_VIEW -> runViewer(runJPlag());
+                case RUN_AND_VIEW -> runAndView();
+                case AUTO -> selectModeAutomatically();
             }
         }
     }
@@ -105,6 +110,15 @@ public File runJPlag() throws ExitException, FileNotFoundException {
         return target;
     }
 
+    /**
+     * Runs JPlag and shows the result in the report viewer
+     * @throws IOException If something went wrong with the internal server
+     * @throws ExitException If JPlag threw an exception
+     */
+    public void runAndView() throws IOException, ExitException {
+        runViewer(runJPlag());
+    }
+
     /**
      * Runs the report viewer using the given file as the default result.zip.
      * @param zipFile The zip file to pass to the viewer. Can be null, if no result should be opened by default
@@ -115,6 +129,31 @@ public void runViewer(File zipFile) throws IOException {
         JPlagRunner.runInternalServer(zipFile, this.inputHandler.getCliOptions().advanced.port);
     }
 
+    private void selectModeAutomatically() throws IOException, ExitException {
+        List<File> inputs = this.getAllInputs();
+
+        if (inputs.isEmpty()) {
+            this.runViewer(null);
+            return;
+        }
+
+        // if the selected mode is auto and there is exactly one zip file selected as an input it is opened in the report viewer
+        if (inputs.size() == 1 && inputs.getFirst().getName().endsWith(ZIP_FILE_EXTENSION)) {
+            this.runViewer(inputs.getFirst());
+            return;
+        }
+
+        this.runAndView();
+    }
+
+    private List<File> getAllInputs() {
+        List<File> inputs = new ArrayList<>();
+        inputs.addAll(List.of(this.inputHandler.getCliOptions().rootDirectory));
+        inputs.addAll(List.of(this.inputHandler.getCliOptions().newDirectories));
+        inputs.addAll(List.of(this.inputHandler.getCliOptions().oldDirectories));
+        return inputs;
+    }
+
     private void finalizeLogger() {
         ILoggerFactory factory = LoggerFactory.getILoggerFactory();
         if (!(factory instanceof CollectedLoggerFactory collectedLoggerFactory)) {

cli/src/main/java/de/jplag/cli/options/CliOptions.java

@@ -55,7 +55,7 @@ public class CliOptions implements Runnable {
 
     @Option(names = {"-M",
             "--mode"}, description = "The mode of JPlag. One of: ${COMPLETION-CANDIDATES} (default: ${DEFAULT_VALUE}). If VIEW is chosen, you can optionally specify a path to an existing report.")
-    public JPlagMode mode = JPlagMode.RUN_AND_VIEW;
+    public JPlagMode mode = JPlagMode.AUTO;
 
     @Option(names = {"--normalize"}, description = "Activate the normalization of tokens. Supported for languages: Java, C++.")
     public boolean normalize = false;

cli/src/main/java/de/jplag/cli/options/JPlagMode.java

@@ -15,5 +15,9 @@ public enum JPlagMode {
     /**
      * Run JPlag and open the result in report viewer
      */
-    RUN_AND_VIEW
+    RUN_AND_VIEW,
+    /**
+     * Choose the mode automatically from the given input files
+     */
+    AUTO,
 }

cli/src/test/java/de/jplag/cli/ModeTest.java

@@ -1,6 +1,7 @@
 package de.jplag.cli;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertThrowsExactly;
 
 import java.io.File;
@@ -53,6 +54,18 @@ void testViewWithMultipleFiles() {
         });
     }
 
+    @Test
+    void testImplicitView() throws IOException, ExitException {
+        CliInputHandler inputHandler = this.runCli(args -> args.with(CliArgument.RESULT_FILE, "result.zip")).inputHandler();
+        assertEquals(new File("result.zip"), inputHandler.getFileForViewMode());
+    }
+
+    @Test
+    void testImplicitReportViewer() throws IOException, ExitException {
+        CliInputHandler inputHandler = this.runCli().inputHandler();
+        assertNull(inputHandler.getFileForViewMode());
+    }
+
     @Override
     public void addDefaultParameters() {
         // prevents the submission directory from being added to the parameters automatically