If you want to learn Russian in London check it out!

lazy val pom2sbt = task {
    val deps = XML.load("pom.xml") \\ "dependencies"
    deps \"dependency" foreach( (dependency:Node) => {
      val groupId = (dependency \ "groupId").text
      val artifactId = (dependency \ "artifactId").text
      val version = (dependency \ "version").text
      val scope = (dependency \ "scope").text
      val classifier = (dependency \ "classifier").text
      val artifactValName: String = artifactId.replaceAll("[-\\.]", "_")

      print("val %s = \"%s\" %% \"%s\" %% \"%s\"".format(artifactValName, groupId, artifactId, version))
      scope match  {
        case "" => print("\n")
        case _ => print(" %% \"%s\"\n".format(scope))
      }
      None
    } )
    None
  }

I want to be able to download java library and it’s dependencies using simple command-line tool i.e.
ivy.sh resolve jetty jetty 5.1.10

Solution

• Download Ivy. Ivy understands maven repositories and can do the job for you.
• Create a script ivy.sh in ivy installation directory with the following content:

  cd=`dirname $0`
  if [ "$1" == "resolve" ]; then
          shift
          echo "Resolving $1 $2 $3"
          java -jar $cd/ivy-2.2.0-rc1.jar -retrieve ./[artifact]-[revision]-[type].[ext] -dependency $*
  fi

• Make your script executable:
  chmod a+x ivy.sh
• Add it to the path ie. ~/.bash_profile
  export PATH=$PATH:/where/you/have/ivy.sh


Enjoy!

I’d like to run cobertura coverage report using gradle in a non intrusive way similar to maven.
I just want to do this:

and in my script:

Current solution

There is a great solution to this problem here. It works, but is not as unintrusive and not as easy to use as I would like it to be.

My solution

This works for Gradle version 0.9-preview-1.

cobertura.gradle:

logger.info "Configuring Cobertura Plugin"

configurations{
  coberturaRuntime {extendsFrom testRuntime}
}

dependencies {
  coberturaRuntime 'net.sourceforge.cobertura:cobertura:1.9.3'
}

def serFile="${project.buildDir}/cobertura.ser"
def classes="${project.sourceSets.main.classesDir}"
def classesCopy="${classes}-copy"

task cobertura(type: Test){
  dependencies {
    testRuntime 'net.sourceforge.cobertura:cobertura:1.9.3'
  }  

  systemProperties["net.sourceforge.cobertura.datafile"] = serFile
}

cobertura.doFirst  {
  logger.quiet "Instrumenting classes for Cobertura"
  ant {
    delete(file:serFile, failonerror:false)
    delete(dir: classesCopy, failonerror:false)
    copy(todir: classesCopy) { fileset(dir: classes) }

    taskdef(resource:'tasks.properties', classpath: configurations.coberturaRuntime.asPath)
    'cobertura-instrument'(datafile: serFile) {
      fileset(dir: classes,
              includes:"**/*.class",
              excludes:"**/*Test.class")
    }
  }
}

cobertura.doLast{
  if (new File(classesCopy).exists()) {
    ant.'cobertura-report'(destdir:"${project.reportsDir}/cobertura",
            format:'html', srcdir:"src/main/java", datafile: serFile)

    ant.delete(file: classes)
    ant.move(file: classesCopy, tofile: classes)
  }
}

And then your build.gradle could look like that:

I would like to be able to run ie. ls -al / from erlang and process the results using erlang. ie.

Files = cmd:run("ls -al /").


Solution

-module(cmd).
-export([run/1, run/2, test/0]).

run(Cmd) ->
	run(Cmd, 5000).

run(Cmd, Timeout) ->
	Port = erlang:open_port({spawn, Cmd},[exit_status]),
	loop(Port,[], Timeout).

loop(Port, Data, Timeout) ->
	receive
		{Port, {data, NewData}} -> loop(Port, Data++NewData, Timeout);
		{Port, {exit_status, 0}} -> Data;
		{Port, {exit_status, S}} -> throw({commandfailed, S})
	after Timeout ->
		throw(timeout)
	end.

test() ->
	shouldReturnCommandResult(),
	shouldThrowAfterTimeout(),
	shouldThrowIfCmdFailed(),
	{ok, "Tests PASSED"}.

shouldReturnCommandResult() ->
	"Hello\n" = run("echo Hello").

shouldThrowAfterTimeout()->
	timeout = (catch run("sleep 10", 20)).

shouldThrowIfCmdFailed()->
		{commandfailed, _} = (catch run("wrongcommand")),
		{commandfailed, _} = (catch run("ls nonexistingfile")).

You want to download javadocs for your depenencies into local repository to be able to use them ie. in IntelliJ.

Solution


mvn dependency:resolve -Dclassifier=javadoc
mvn dependency:resolve -Dclassifier=sources


Enjoy!

Compressor.java

import java.io.*;
import java.util.zip.*;

import org.apache.commons.io.IOUtils;

public class Compressor{
    public static byte[] compress(byte[] content){
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        try{
            GZIPOutputStream gzipOutputStream = new GZIPOutputStream(byteArrayOutputStream);
            gzipOutputStream.write(content);
            gzipOutputStream.close();
        } catch(IOException e){
            throw new RuntimeException(e);
        }
        System.out.printf("Compression ratio %f\n", (1.0f * content.length/byteArrayOutputStream.size()));
        return byteArrayOutputStream.toByteArray();
    }

    public static byte[] decompress(byte[] contentBytes){
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        try{
            IOUtils.copy(new GZIPInputStream(new ByteArrayInputStream(contentBytes)), out);
        } catch(IOException e){
            throw new RuntimeException(e);
        }
        return out.toByteArray();
    }

    public static boolean notWorthCompressing(String contentType){
        return contentType.contains("jpeg")
                || contentType.contains("pdf")
                || contentType.contains("zip")
                || contentType.contains("mpeg")
                || contentType.contains("avi");
    }
}

Dependencies: Apache commons-io.jar

I could not find a regex matcher in hamcrest, to do ie.
assertThat(selenium.getTitle(), matches("Template T\d{3}"));

It could be that I was not looking well enough or Nat Pryce decided not to include it on purpose. Of’course I saw PatternMatcher, but it lets you build regexes rather then match against them.

Solution

So here you have, enjoy!

public class RegexMatcher extends BaseMatcher{
    private final String regex;

    public RegexMatcher(String regex){
        this.regex = regex;
    }

    public boolean matches(Object o){
        return ((String)o).matches(regex);

    }

    public void describeTo(Description description){
        description.appendText("matches regex=");
    }

    public static RegexMatcher matches(String regex){
        return new RegexMatcher(regex);
    }
}

I want to add custom shortcuts in Open/Save As dialog box in XP

Manual Solution:

Check this article by Ryan Gordon out if you want to do it manually.

Automatic Solution:

Create custom-save_as.reg file with content similar to the following:

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Comdlg32]

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Comdlg32\PlacesBar]
"Place1"="e:\\piotrga"
"Place2"="e:\\piotrga\\tmp"
"Place3"="e:\\piotrga\\Download"

Then right-click custom-save_as.reg and select "Merge" option.

Now open Save As/Open dialog and enjoy!

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