LCOV - code coverage report
Current view: top level - pgm - PrologShell.java (source / functions) Hit Total Coverage
Test: _coverage_report.dat Lines: 0 38 0.0 %
Date: 2022-11-19 15:00:39 Functions: 0 4 0.0 %

          Line data    Source code
       1             : // Copyright (C) 2011 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.pgm;
      16             : 
      17             : import com.google.gerrit.pgm.util.AbstractProgram;
      18             : import com.googlecode.prolog_cafe.exceptions.HaltException;
      19             : import com.googlecode.prolog_cafe.lang.BufferingPrologControl;
      20             : import com.googlecode.prolog_cafe.lang.Prolog;
      21             : import com.googlecode.prolog_cafe.lang.PrologClassLoader;
      22             : import com.googlecode.prolog_cafe.lang.SymbolTerm;
      23             : import java.io.File;
      24             : import java.io.IOException;
      25             : import java.util.ArrayList;
      26             : import java.util.List;
      27             : import org.kohsuke.args4j.Option;
      28             : 
      29           0 : public class PrologShell extends AbstractProgram {
      30           0 :   @Option(name = "-s", metaVar = "FILE.pl", usage = "file to load")
      31             :   private List<String> fileName = new ArrayList<>();
      32             : 
      33             :   @Option(name = "-q", usage = "quiet mode without banner")
      34             :   private boolean quiet;
      35             : 
      36             :   @Override
      37             :   public int run() {
      38           0 :     if (!quiet) {
      39           0 :       banner();
      40             :     }
      41             : 
      42           0 :     BufferingPrologControl pcl = new BufferingPrologControl();
      43           0 :     pcl.setPrologClassLoader(new PrologClassLoader(getClass().getClassLoader()));
      44           0 :     pcl.setEnabled(Prolog.Feature.IO, true);
      45           0 :     pcl.setEnabled(Prolog.Feature.STATISTICS, true);
      46           0 :     pcl.configureUserIO(System.in, System.out, System.err);
      47           0 :     pcl.initialize(Prolog.BUILTIN);
      48             : 
      49           0 :     for (String file : fileName) {
      50             :       String path;
      51             :       try {
      52           0 :         path = new File(file).getCanonicalPath();
      53           0 :       } catch (IOException e) {
      54           0 :         path = new File(file).getAbsolutePath();
      55           0 :       }
      56           0 :       pcl.execute(Prolog.BUILTIN, "consult", SymbolTerm.create(path));
      57           0 :       System.err.println();
      58           0 :       System.err.flush();
      59           0 :     }
      60             : 
      61             :     try {
      62           0 :       pcl.execute(Prolog.BUILTIN, "cafeteria");
      63           0 :       if (!quiet) {
      64           0 :         write("% halt\n");
      65             :       }
      66           0 :       return 0;
      67           0 :     } catch (HaltException halt) {
      68           0 :       write("% halt(" + halt.getStatus() + ")\n");
      69           0 :       return halt.getStatus();
      70             :     }
      71             :   }
      72             : 
      73             :   private void banner() {
      74           0 :     System.err.format(
      75             :         "Gerrit Code Review %s - Interactive Prolog Shell",
      76           0 :         com.google.gerrit.common.Version.getVersion());
      77           0 :     System.err.println();
      78           0 :     System.err.println(
      79             :         "(type Ctrl-D or \"halt.\" to exit, \"['path/to/file.pl'].\" to load a file)");
      80           0 :     System.err.println();
      81           0 :     System.err.flush();
      82           0 :   }
      83             : 
      84             :   private void write(String msg) {
      85           0 :     System.out.flush();
      86           0 :     System.err.flush();
      87           0 :     System.out.println(msg);
      88           0 :     System.out.flush();
      89           0 :   }
      90             : }

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