two new attrs to loadfile to make it more flexible in feeding other tasks

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@271033 13f79535-47bb-0310-9956-ffa450edef68
24 years ago · dd38c61aec
--- a/docs/manual/CoreTasks/loadfile.html
+++ b/docs/manual/CoreTasks/loadfile.html
@@ -5,50 +5,75 @@

 <body>


 <h2><a name="loadfile">LoadFile</a></h2>
 <h3>Description</h3>
 <p>
 Load a text file into a single property. Unless an encoding is specified,
 the encoding of the current locale is used. There is no explicit limit
 upon the size of the file which can be loaded, but loading very large
 files is not something anyone has yet explored. 
 
 files is not something anyone has yet explored. Because the file is
 converted to text

 </p>

 <h3>Parameters</h3>
 <table border="1" cellpadding="2" cellspacing="0">
  <tr> 
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr> 
  <tr>
    <td valign="top">srcFile</td>
    <td valign="top">source file</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr> 
  <tr>
    <td valign="top">property</td>
    <td valign="top">property to save to</td>
    <td valign="top" align="center">Yes</td>
  </tr>
  <tr> 
  <tr>
    <td valign="top">encoding</td>
    <td valign="top">encoding to use when loading the file</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr> 
  <tr>
    <td valign="top">failonerror</td>
    <td valign="top">Whether to halt the build on failure</td>
    <td align="center" valign="top">No, default "true"</td>
  </tr>
  <tr>
    <td valign="top">evaluateProperties</td>
    <td valign="top">flag to enable property evalation in the file</td>
    <td align="center" valign="top">No, default "false"</td>
  </tr>
  <tr>
    <td valign="top">makeOneLine</td>
    <td valign="top">flag to strip out newlines (but not spaces or
        tabs) from the file</td>
    <td align="center" valign="top">No, default "false"</td>
  </tr>
 </table>
 <p>
 The <tt>makeOneLine</tt> parameter enables you to use a file as an
 input to task parameters which expect single line input. It flattens
 the file by removing all carriage return and line feed characters,
 so that the file
 <pre>a
 b
 c
 </pre>would become "abc": you need spaces or
 commas at the end/start of line to stop alphanumeric characters
 being merged together.

 <h3>Examples</h3>
 <pre>    &lt;loadfile property="mail.recipients"
      srcFile="recipients.txt" / &gt;
 <pre>    &lt;loadfile property="message"
      srcFile="message.txt" / &gt;
 </pre>
 Load file recipients.txt into property "mail.recipients"
 Load file message.txt into property "message"; an <tt>&lt;echo&gt;</tt>
 can print this.

 <pre>    &lt;loadfile property="encoded-file"
      srcFile="loadfile.xml"
@@ -56,16 +81,35 @@ Load file recipients.txt into property "mail.recipients"
 </pre>
 Load a file using the latin-1 encoding

 <pre>    &lt;loadfile 
      property="optional.value" 
      srcFile="optional.txt" 
 <pre>    &lt;loadfile
      property="optional.value"
      srcFile="optional.txt"
      failonerror="false" /&gt;
 </pre>
 Load a file, don't fail if it is missing (a message is printed, though) 
 Load a file, don't fail if it is missing (a message is printed, though)

 <pre>    &lt;loadfile
      property="mail.recipients"
      srcFile="recipientlist.txt"
      makeOneLine="true" /&gt;
 </pre>

 load a property which can be used as a parameter for another task (in this case mail),
 merging lines to ensure this happens.

 <pre>    &lt;loadfile
      property="system.configuration.xml"
      srcFile="configuration.xml"
      evaluateProperties="true" /&gt;
 </pre>

 load an XML file into a property, expanding all properties declared
 in the file in the process.


 <hr>

 <p align="center">Copyright &copy; 2001 Apache Software Foundation. All rights
 <p align="center">Copyright &copy; 2001-2002 Apache Software Foundation. All rights
 Reserved.</p>

 </body>
--- a/src/etc/testcases/taskdefs/loadfile.xml
+++ b/src/etc/testcases/taskdefs/loadfile.xml
@@ -1,19 +1,19 @@
 <?xml version="1.0" encoding="ISO-8859-1"?>
 <project name="loadfile-test" basedir="." default="testLoadAFile">

 

  <target name="init">
  </target>

  <target name="testNoSourcefileDefined" depends="init">
    <loadfile property="foo" />
  </target>
 

  <target name="testNoPropertyDefined"
    depends="init">
    <loadfile srcFile="somefile" />
  </target>
  


  <target name="testNoSourcefilefound"
    depends="init">
@@ -22,15 +22,15 @@

  <target name="testFailOnError"
    depends="init">
    <loadfile 
      property="testFailOnError" 
      srcFile="somefile" 
    <loadfile
      property="testFailOnError"
      srcFile="somefile"
      failonerror="false"/>
  </target>  
  
  </target>

  <target name="testLoadAFile"
    depends="init">
    <echo 
    <echo
      message="What's it going to be then, eh?"
      file="loadfile1.tmp"
      />
@@ -44,9 +44,38 @@
      srcFile="loadfile.xml"
      encoding="ISO-8859-1"/>
  </target>
  
  <target name="cleanup"> 

  <target name="testEvalProps"
    depends="init">
    <property name="weather" value="rain" />
    <echo
      message="All these moments will be lost in time, like teardrops in the ${weather}"
      file="loadfile1.tmp"
      />
    <loadfile property="testEvalProps"
        srcFile="loadfile1.tmp"
        evaluateProperties="true"
        />
    <echo>${testLoadAFile}</echo>
  </target>


  <target name="testOneLine"
    depends="init">
    <echo
      message="1,&#10;2,&#13;3,&#13;&#10;4"
      file="loadfile1.tmp"
      />
    <loadfile property="testOneLine"
        srcFile="loadfile1.tmp"
        makeOneLine="true"
        />
    <echo>${testLoadAFile}</echo>
  </target>


  <target name="cleanup">
    <delete file="loadfile1.tmp"/>
  </target>
  

  </project>
--- a/src/main/org/apache/tools/ant/taskdefs/LoadFile.java
+++ b/src/main/org/apache/tools/ant/taskdefs/LoadFile.java
@@ -1,7 +1,7 @@
 /*
 *  The Apache Software License, Version 1.1
 *
 *  Copyright (c) 2001 The Apache Software Foundation.  All rights
 *  Copyright (c) 2001-2002 The Apache Software Foundation.  All rights
 *  reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
@@ -56,14 +56,10 @@ package org.apache.tools.ant.taskdefs;
 import org.apache.tools.ant.Task;
 import org.apache.tools.ant.Project;
 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.ProjectHelper;



 import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStreamReader;
 import java.io.IOException;
 import java.io.BufferedInputStream;
 import java.io.*;

 /**
 * Load a file into a property
@@ -95,6 +91,16 @@ public class LoadFile extends Task {
    private String property = null;


    /** flag to control if we flatten the file or no'
     *
     */
    private boolean makeOneLine=false;

    /**
     * flag to control whether props get evaluated or not
     */
    private boolean evaluateProperties=false;

    /**
     * Encoding to use for filenames, defaults to the platform's default
     * encoding. <p>
@@ -140,6 +146,22 @@ public class LoadFile extends Task {
        failOnError = fail;
    }

    /**
     * setter to flatten the file to a single line
     * @since 1.6
     */
    public void setMakeOneLine(boolean makeOneLine) {
        this.makeOneLine=makeOneLine;
    }

    /**
     * setter to eval properties.
     * @since 1.6
     */
    public void setEvaluateProperties(boolean evaluateProperties) {
        this.evaluateProperties=evaluateProperties;
    }


    /**
     * read in a source file to a property
@@ -157,7 +179,7 @@ public class LoadFile extends Task {
        }
        FileInputStream fis = null;
        BufferedInputStream bis = null;
        InputStreamReader instream = null;
        Reader instream = null;
        log("loading "+srcFile+" into property "+property,Project.MSG_VERBOSE);
        try {
            long len = srcFile.length();
@@ -179,6 +201,12 @@ public class LoadFile extends Task {
            }
            instream.read(buffer);
            String text = new String(buffer);
            if (makeOneLine) {
                text=stripLineBreaks(text);
            }
            if(evaluateProperties) {
                text=ProjectHelper.replaceProperties(project,text);
            }
            project.setNewProperty(property, text);
            log("loaded "+buffer.length+" characters",Project.MSG_VERBOSE);
            log(property+" := "+text,Project.MSG_DEBUG);
@@ -201,5 +229,28 @@ public class LoadFile extends Task {
        }
    }

    /**
     * strip out all line breaks from a string.
     * @param source source
     * This implementation always duplicates the string; it is nominally possible to probe
     * the string first looking for any line breaks before bothering to do a copy. But we assume if
     * the option is requested, then line breaks are probably in the source string.
     */
    protected String stripLineBreaks(String source) {
        //Linebreaks. What do to on funny IBM mainframes with odd line endings?
        String linebreaks="\r\n";
        int len=source.length();

        StringBuffer dest=new StringBuffer(len);
        for(int i=0;i<len;++i) {
            char ch=source.charAt(i);
            if(linebreaks.indexOf(ch)==-1) {
                dest.append(ch);
            }
        }
        return new String(dest);

    }

 //end class
 }
--- a/src/testcases/org/apache/tools/ant/taskdefs/LoadFileTest.java
+++ b/src/testcases/org/apache/tools/ant/taskdefs/LoadFileTest.java
@@ -1,7 +1,7 @@
 /*
 *  The Apache Software License, Version 1.1
 *
 *  Copyright (c) 2001 The Apache Software Foundation.  All rights
 *  Copyright (c) 2001-2002 The Apache Software Foundation.  All rights
 *  reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
@@ -124,10 +124,7 @@ public class LoadFileTest extends BuildFileTest {
     */
    public void testFailOnError()
            throws BuildException {
        executeTarget("testFailOnError");
        if(project.getProperty("testFailOnError")!=null) {
            fail("property should not have been defined");
        }
        expectPropertyUnset("testFailOnError","testFailOnError");
    }


@@ -152,9 +149,27 @@ public class LoadFileTest extends BuildFileTest {
        if(project.getProperty("testLoadAFileEnc")==null) {
            fail("file load failed");
        }
    }

        /**
     * A unit test for JUnit
     */
    public void testEvalProps()
            throws BuildException {
        executeTarget("testEvalProps");
        if(project.getProperty("testEvalProps").indexOf("rain")<0) {
            fail("property eval broken");
        }
    }

        /**
     * A unit test for JUnit
     */
    public void testOneLine()
            throws BuildException {
            expectPropertySet("testOneLine","testOneLine","1,2,3,4");

    }
 }