HelpMojo.java
- package org.owasp.dependency_check_maven;
- import org.apache.maven.plugin.AbstractMojo;
- import org.apache.maven.plugin.MojoExecutionException;
- import org.apache.maven.plugins.annotations.Mojo;
- import org.apache.maven.plugins.annotations.Parameter;
- import org.w3c.dom.Document;
- import org.w3c.dom.Element;
- import org.w3c.dom.Node;
- import org.w3c.dom.NodeList;
- import org.xml.sax.SAXException;
- import javax.xml.parsers.DocumentBuilder;
- import javax.xml.parsers.DocumentBuilderFactory;
- import javax.xml.parsers.ParserConfigurationException;
- import java.io.IOException;
- import java.io.InputStream;
- import java.util.ArrayList;
- import java.util.List;
- /**
- * Display help information on dependency-check-maven.<br>
- * Call <code>mvn dependency-check:help -Ddetail=true -Dgoal=<goal-name></code> to display parameter details.
- * @author maven-plugin-tools
- */
- @Mojo( name = "help", requiresProject = false, threadSafe = true )
- public class HelpMojo
- extends AbstractMojo
- {
- /**
- * If <code>true</code>, display all settable properties for each goal.
- *
- */
- @Parameter( property = "detail", defaultValue = "false" )
- private boolean detail;
- /**
- * The name of the goal for which to show help. If unspecified, all goals will be displayed.
- *
- */
- @Parameter( property = "goal" )
- private java.lang.String goal;
- /**
- * The maximum length of a display line, should be positive.
- *
- */
- @Parameter( property = "lineLength", defaultValue = "80" )
- private int lineLength;
- /**
- * The number of spaces per indentation level, should be positive.
- *
- */
- @Parameter( property = "indentSize", defaultValue = "2" )
- private int indentSize;
- // /META-INF/maven/<groupId>/<artifactId>/plugin-help.xml
- private static final String PLUGIN_HELP_PATH =
- "/META-INF/maven/org.owasp/dependency-check-maven/plugin-help.xml";
- private static final int DEFAULT_LINE_LENGTH = 80;
- private Document build()
- throws MojoExecutionException
- {
- getLog().debug( "load plugin-help.xml: " + PLUGIN_HELP_PATH );
- try ( InputStream is = getClass().getResourceAsStream( PLUGIN_HELP_PATH ) )
- {
- if ( is == null )
- {
- throw new MojoExecutionException( "Could not find plugin descriptor at " + PLUGIN_HELP_PATH );
- }
- DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
- DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
- return dBuilder.parse( is );
- }
- catch ( IOException e )
- {
- throw new MojoExecutionException( e.getMessage(), e );
- }
- catch ( ParserConfigurationException e )
- {
- throw new MojoExecutionException( e.getMessage(), e );
- }
- catch ( SAXException e )
- {
- throw new MojoExecutionException( e.getMessage(), e );
- }
- }
- /**
- * {@inheritDoc}
- */
- @Override
- public void execute()
- throws MojoExecutionException
- {
- if ( lineLength <= 0 )
- {
- getLog().warn( "The parameter 'lineLength' should be positive, using '80' as default." );
- lineLength = DEFAULT_LINE_LENGTH;
- }
- if ( indentSize <= 0 )
- {
- getLog().warn( "The parameter 'indentSize' should be positive, using '2' as default." );
- indentSize = 2;
- }
- Document doc = build();
- StringBuilder sb = new StringBuilder();
- Node plugin = getSingleChild( doc, "plugin" );
- String name = getValue( plugin, "name" );
- String version = getValue( plugin, "version" );
- String id = getValue( plugin, "groupId" ) + ":" + getValue( plugin, "artifactId" ) + ":" + version;
- if ( isNotEmpty( name ) && !name.contains( id ) )
- {
- append( sb, name + " " + version, 0 );
- }
- else
- {
- if ( isNotEmpty( name ) )
- {
- append( sb, name, 0 );
- }
- else
- {
- append( sb, id, 0 );
- }
- }
- append( sb, getValue( plugin, "description" ), 1 );
- append( sb, "", 0 );
- //<goalPrefix>plugin</goalPrefix>
- String goalPrefix = getValue( plugin, "goalPrefix" );
- Node mojos1 = getSingleChild( plugin, "mojos" );
- List<Node> mojos = findNamedChild( mojos1, "mojo" );
- if ( goal == null || goal.length() <= 0 )
- {
- append( sb, "This plugin has " + mojos.size() + ( mojos.size() > 1 ? " goals:" : " goal:" ), 0 );
- append( sb, "", 0 );
- }
- for ( Node mojo : mojos )
- {
- writeGoal( sb, goalPrefix, (Element) mojo );
- }
- if ( getLog().isInfoEnabled() )
- {
- getLog().info( sb.toString() );
- }
- }
- private static boolean isNotEmpty( String string )
- {
- return string != null && string.length() > 0;
- }
- private static String getValue( Node node, String elementName )
- throws MojoExecutionException
- {
- return getSingleChild( node, elementName ).getTextContent();
- }
- private static Node getSingleChild( Node node, String elementName )
- throws MojoExecutionException
- {
- List<Node> namedChild = findNamedChild( node, elementName );
- if ( namedChild.isEmpty() )
- {
- throw new MojoExecutionException( "Could not find " + elementName + " in plugin-help.xml" );
- }
- if ( namedChild.size() > 1 )
- {
- throw new MojoExecutionException( "Multiple " + elementName + " in plugin-help.xml" );
- }
- return namedChild.get( 0 );
- }
- private static List<Node> findNamedChild( Node node, String elementName )
- {
- List<Node> result = new ArrayList<Node>();
- NodeList childNodes = node.getChildNodes();
- for ( int i = 0; i < childNodes.getLength(); i++ )
- {
- Node item = childNodes.item( i );
- if ( elementName.equals( item.getNodeName() ) )
- {
- result.add( item );
- }
- }
- return result;
- }
- private static Node findSingleChild( Node node, String elementName )
- throws MojoExecutionException
- {
- List<Node> elementsByTagName = findNamedChild( node, elementName );
- if ( elementsByTagName.isEmpty() )
- {
- return null;
- }
- if ( elementsByTagName.size() > 1 )
- {
- throw new MojoExecutionException( "Multiple " + elementName + "in plugin-help.xml" );
- }
- return elementsByTagName.get( 0 );
- }
- private void writeGoal( StringBuilder sb, String goalPrefix, Element mojo )
- throws MojoExecutionException
- {
- String mojoGoal = getValue( mojo, "goal" );
- Node configurationElement = findSingleChild( mojo, "configuration" );
- Node description = findSingleChild( mojo, "description" );
- if ( goal == null || goal.length() <= 0 || mojoGoal.equals( goal ) )
- {
- append( sb, goalPrefix + ":" + mojoGoal, 0 );
- Node deprecated = findSingleChild( mojo, "deprecated" );
- if ( ( deprecated != null ) && isNotEmpty( deprecated.getTextContent() ) )
- {
- append( sb, "Deprecated. " + deprecated.getTextContent(), 1 );
- if ( detail && description != null )
- {
- append( sb, "", 0 );
- append( sb, description.getTextContent(), 1 );
- }
- }
- else if ( description != null )
- {
- append( sb, description.getTextContent(), 1 );
- }
- append( sb, "", 0 );
- if ( detail )
- {
- Node parametersNode = getSingleChild( mojo, "parameters" );
- List<Node> parameters = findNamedChild( parametersNode, "parameter" );
- append( sb, "Available parameters:", 1 );
- append( sb, "", 0 );
- for ( Node parameter : parameters )
- {
- writeParameter( sb, parameter, configurationElement );
- }
- }
- }
- }
- private void writeParameter( StringBuilder sb, Node parameter, Node configurationElement )
- throws MojoExecutionException
- {
- String parameterName = getValue( parameter, "name" );
- String parameterDescription = getValue( parameter, "description" );
- Element fieldConfigurationElement = null;
- if ( configurationElement != null )
- {
- fieldConfigurationElement = (Element) findSingleChild( configurationElement, parameterName );
- }
- String parameterDefaultValue = "";
- if ( fieldConfigurationElement != null && fieldConfigurationElement.hasAttribute( "default-value" ) )
- {
- parameterDefaultValue = " (Default: " + fieldConfigurationElement.getAttribute( "default-value" ) + ")";
- }
- append( sb, parameterName + parameterDefaultValue, 2 );
- Node deprecated = findSingleChild( parameter, "deprecated" );
- if ( ( deprecated != null ) && isNotEmpty( deprecated.getTextContent() ) )
- {
- append( sb, "Deprecated. " + deprecated.getTextContent(), 3 );
- append( sb, "", 0 );
- }
- if ( isNotEmpty( parameterDescription ) ) {
- append( sb, parameterDescription, 3 );
- }
- if ( "true".equals( getValue( parameter, "required" ) ) )
- {
- append( sb, "Required: Yes", 3 );
- }
- if ( ( fieldConfigurationElement != null ) && isNotEmpty( fieldConfigurationElement.getTextContent() ) )
- {
- String property = getPropertyFromExpression( fieldConfigurationElement.getTextContent() );
- append( sb, "User property: " + property, 3 );
- }
- append( sb, "", 0 );
- }
- /**
- * <p>Repeat a String <code>n</code> times to form a new string.</p>
- *
- * @param str String to repeat
- * @param repeat number of times to repeat str
- * @return String with repeated String
- * @throws NegativeArraySizeException if <code>repeat < 0</code>
- * @throws NullPointerException if str is <code>null</code>
- */
- private static String repeat( String str, int repeat )
- {
- StringBuilder buffer = new StringBuilder( repeat * str.length() );
- for ( int i = 0; i < repeat; i++ )
- {
- buffer.append( str );
- }
- return buffer.toString();
- }
- /**
- * Append a description to the buffer by respecting the indentSize and lineLength parameters.
- * <b>Note</b>: The last character is always a new line.
- *
- * @param sb The buffer to append the description, not <code>null</code>.
- * @param description The description, not <code>null</code>.
- * @param indent The base indentation level of each line, must not be negative.
- */
- private void append( StringBuilder sb, String description, int indent )
- {
- for ( String line : toLines( description, indent, indentSize, lineLength ) )
- {
- sb.append( line ).append( '\n' );
- }
- }
- /**
- * Splits the specified text into lines of convenient display length.
- *
- * @param text The text to split into lines, must not be <code>null</code>.
- * @param indent The base indentation level of each line, must not be negative.
- * @param indentSize The size of each indentation, must not be negative.
- * @param lineLength The length of the line, must not be negative.
- * @return The sequence of display lines, never <code>null</code>.
- * @throws NegativeArraySizeException if <code>indent < 0</code>
- */
- private static List<String> toLines( String text, int indent, int indentSize, int lineLength )
- {
- List<String> lines = new ArrayList<String>();
- String ind = repeat( "\t", indent );
- String[] plainLines = text.split( "(\r\n)|(\r)|(\n)" );
- for ( String plainLine : plainLines )
- {
- toLines( lines, ind + plainLine, indentSize, lineLength );
- }
- return lines;
- }
- /**
- * Adds the specified line to the output sequence, performing line wrapping if necessary.
- *
- * @param lines The sequence of display lines, must not be <code>null</code>.
- * @param line The line to add, must not be <code>null</code>.
- * @param indentSize The size of each indentation, must not be negative.
- * @param lineLength The length of the line, must not be negative.
- */
- private static void toLines( List<String> lines, String line, int indentSize, int lineLength )
- {
- int lineIndent = getIndentLevel( line );
- StringBuilder buf = new StringBuilder( 256 );
- String[] tokens = line.split( " +" );
- for ( String token : tokens )
- {
- if ( buf.length() > 0 )
- {
- if ( buf.length() + token.length() >= lineLength )
- {
- lines.add( buf.toString() );
- buf.setLength( 0 );
- buf.append( repeat( " ", lineIndent * indentSize ) );
- }
- else
- {
- buf.append( ' ' );
- }
- }
- for ( int j = 0; j < token.length(); j++ )
- {
- char c = token.charAt( j );
- if ( c == '\t' )
- {
- buf.append( repeat( " ", indentSize - buf.length() % indentSize ) );
- }
- else if ( c == '\u00A0' )
- {
- buf.append( ' ' );
- }
- else
- {
- buf.append( c );
- }
- }
- }
- lines.add( buf.toString() );
- }
- /**
- * Gets the indentation level of the specified line.
- *
- * @param line The line whose indentation level should be retrieved, must not be <code>null</code>.
- * @return The indentation level of the line.
- */
- private static int getIndentLevel( String line )
- {
- int level = 0;
- for ( int i = 0; i < line.length() && line.charAt( i ) == '\t'; i++ )
- {
- level++;
- }
- for ( int i = level + 1; i <= level + 4 && i < line.length(); i++ )
- {
- if ( line.charAt( i ) == '\t' )
- {
- level++;
- break;
- }
- }
- return level;
- }
- private static String getPropertyFromExpression( String expression )
- {
- if ( expression != null && expression.startsWith( "${" ) && expression.endsWith( "}" )
- && !expression.substring( 2 ).contains( "${" ) )
- {
- // expression="${xxx}" -> property="xxx"
- return expression.substring( 2, expression.length() - 1 );
- }
- // no property can be extracted
- return null;
- }
- }