IzPack

Document how to debug an uninstaller

Details

  • Type: Sub-task Sub-task
  • Status: Closed Closed
  • Priority: Minor Minor
  • Resolution: Fixed
  • Affects Version/s: 4.2.1
  • Fix Version/s: 4.3.1
  • Component/s: Documentation
  • Labels:
    None
  • Patch Submitted:
    Yes
  • Number of attachments :
    2

Description

The FAQ documents how to get console and debug output from an installer (http://docs.codehaus.org/display/IZPACK/FAQ+-+Frequently+asked+questions#FAQ-Frequentlyaskedquestions-DebugOutput ). But it's not so easy to get console output from an uninstaller, at least under Windows.

When the uninstaller is called using

java -jar -DTRACE=TRUE uninstaller.jar

console output is not visible.

The uninstaller uses the SelfModifier class to start a new java VM and the console output of the second VM is not visible.

One possible solution is to write a class that starts the uninstaller code by bypassing SelfModifier:

import com.izforge.izpack.uninstaller.Uninstaller;

public class IzPackUninstallerStarter {

public static void main (String args[])

{ Uninstaller.uninstall (args); }

}

  1. Text File
    IZPACK-331.patch
    08/Apr/09 6:35 AM
    2 kB
    Christian d'Heureuse
  2. Java Source File
    IzPackUninstallerStarter.java
    02/Apr/09 6:41 PM
    0.2 kB
    Christian d'Heureuse

Activity

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Julien Ponge added a comment -

Would you have a piece of documentation for this?

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Julien Ponge added a comment - Would you have a piece of documentation for this?
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Christian d'Heureuse added a comment -

Added a sample class that can be used to start an uninstaller so that console output is visible. (Console output is otherwise not visible on Windows). It bypasses the SelfModifier class.

When the class is included in the uninstaller JAR, the following command can be used:

java -cp uninstaller.jar IzPackUninstallerStarter

Show
Christian d'Heureuse added a comment - Added a sample class that can be used to start an uninstaller so that console output is visible. (Console output is otherwise not visible on Windows). It bypasses the SelfModifier class. When the class is included in the uninstaller JAR, the following command can be used: java -cp uninstaller.jar IzPackUninstallerStarter
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Julien Ponge added a comment -

I have updated the FAQ with a link to this issue as it fits better here.

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Julien Ponge added a comment - I have updated the FAQ with a link to this issue as it fits better here.
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Christian d'Heureuse added a comment -

Added a patch to implement a "-d" (direct) option switch for Uninstaller.java.

This would make it easier to get console output from the uninstaller.

With this patch, the uninstaller can be called as:

java -jar uninstaller.jar -d

Show
Christian d'Heureuse added a comment - Added a patch to implement a "-d" (direct) option switch for Uninstaller.java. This would make it easier to get console output from the uninstaller. With this patch, the uninstaller can be called as: java -jar uninstaller.jar -d
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Julien Ponge added a comment -

Marked as iixed as Christian has updated the issue.

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Julien Ponge added a comment - Marked as iixed as Christian has updated the issue.

People

  • Assignee:
    Julien Ponge
    Reporter:
    Christian d'Heureuse
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Dates

  • Created:
    Updated:
    Resolved: