How do I diff two images?

I can install a library and start communicating over sockets with one line of code?!  That's incredible.

[Incidentally, as a system administrator, I did ask about diffing two filesystems: http://serverfault.com/questions/10424/diffing-two-filesystems .  (grin)]

Clinton

On Sat, May 22, 2010 at 7:59 AM, David Mitchell <[hidden email]> wrote:

People have certainly built tools that do image archeology but they
have tended to be more academic than practical.

Outside of Squeak, imagine writing a tool to look at two WMware VMDK
files onto which two different people had installed Windows, Firefox,
and various other tools. It might be theoretically possible to write a
program that would look at two VMDKs and tell you about the different
versions of programs that are installed, but it is practically very
difficult. It would be much easier to start both machines on the
network and have them inventory their programs and then compare.

If you are interested in having two (running) Squeaks talk to one
another, you might want to look at Magma. Magma can store just about
any Squeak object in an object database that multiple Squeaks can
connect.

Magma's remote framework can be used outside of Magma. It is available
as "Ma client server" See this page for details and usage:

http://wiki.squeak.org/squeak/2978

On Sat, May 22, 2010 at 8:24 AM, Clinton Blackmore
<[hidden email]> wrote:
> Yes, I suppose an image is a virtual machine suspended in time.  I hadn't
> even considered comparing things other than the source code.
> I'd wondered about filing everything out.  That sounds like the way to go.
>  Having the two images talk to each other and run comparisons also sounds
> very interesting -- but sounds rather difficult (although, perhaps it is not
> and it is just my lack of understanding of squeak that makes it seem so).
> Clinton
>
> On Sat, May 22, 2010 at 4:07 AM, Mateusz Grotek <[hidden email]>
> wrote:
>>
>> If you want to compare source code only, you can file it out. You could
>> also write some code in both images, and ask them to do comparisons (use
>> sockets of fifos, or similar mechanisms for IPC).
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>
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I have heard of Monticello.  (I may need to re-read the chapter on it in Squeak By Example).  I've used other version control systems, and understand how to use them, but I don't know of any that let you diff source trees that aren't in the same version control system, so I have no reason to expect that Monticello would do that, either.

Still, I suppose I could try to leverage off of the diffing tools and change the way that it gets its input data.   My biggest hang-up is that I am, well, a beginner with Squeak.

Thank you,

Clinton

On Thu, May 27, 2010 at 8:25 AM, Mariano Abel Coca <[hidden email]> wrote:

Sorry for the noise, I don't know if this is what you are looking for, but just because it hasn't been mentioned in this thread I have to suggest it: have you looked at Monticello and Metacello?

Monticello is the similar to a cvs repository merged with aptitude. And it has it's own diffing tools to compare and merge sources.

And Metacello defines dependencies between packages and it's versions.

Cheers,

Mariano.

On Sat, May 22, 2010 at 11:38 AM, Clinton Blackmore <[hidden email]> wrote:

I can install a library and start communicating over sockets with one line of code?!  That's incredible.

[Incidentally, as a system administrator, I did ask about diffing two filesystems: http://serverfault.com/questions/10424/diffing-two-filesystems .  (grin)]

Clinton

On Sat, May 22, 2010 at 7:59 AM, David Mitchell <[hidden email]> wrote:

People have certainly built tools that do image archeology but they
have tended to be more academic than practical.

Outside of Squeak, imagine writing a tool to look at two WMware VMDK
files onto which two different people had installed Windows, Firefox,
and various other tools. It might be theoretically possible to write a
program that would look at two VMDKs and tell you about the different
versions of programs that are installed, but it is practically very
difficult. It would be much easier to start both machines on the
network and have them inventory their programs and then compare.

If you are interested in having two (running) Squeaks talk to one
another, you might want to look at Magma. Magma can store just about
any Squeak object in an object database that multiple Squeaks can
connect.

Magma's remote framework can be used outside of Magma. It is available
as "Ma client server" See this page for details and usage:

http://wiki.squeak.org/squeak/2978

On Sat, May 22, 2010 at 8:24 AM, Clinton Blackmore
<[hidden email]> wrote:
> Yes, I suppose an image is a virtual machine suspended in time.  I hadn't
> even considered comparing things other than the source code.
> I'd wondered about filing everything out.  That sounds like the way to go.
>  Having the two images talk to each other and run comparisons also sounds
> very interesting -- but sounds rather difficult (although, perhaps it is not
> and it is just my lack of understanding of squeak that makes it seem so).
> Clinton
>
> On Sat, May 22, 2010 at 4:07 AM, Mateusz Grotek <[hidden email]>
> wrote:
>>
>> If you want to compare source code only, you can file it out. You could
>> also write some code in both images, and ask them to do comparisons (use
>> sockets of fifos, or similar mechanisms for IPC).
>> _______________________________________________
>> Beginners mailing list
>> [hidden email]
>> http://lists.squeakfoundation.org/mailman/listinfo/beginners
>
>
> _______________________________________________
> Beginners mailing list
> [hidden email]
> http://lists.squeakfoundation.org/mailman/listinfo/beginners
>
>
_______________________________________________
Beginners mailing list
[hidden email]
http://lists.squeakfoundation.org/mailman/listinfo/beginners

_______________________________________________
Beginners mailing list
[hidden email]
http://lists.squeakfoundation.org/mailman/listinfo/beginners

_______________________________________________
Beginners mailing list
[hidden email]
http://lists.squeakfoundation.org/mailman/listinfo/beginners

_______________________________________________
Beginners mailing list
[hidden email]
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On 27.05.2010, at 16:34, Clinton Blackmore wrote:

I have heard of Monticello.  (I may need to re-read the chapter on it in Squeak By Example).  I've used other version control systems, and understand how to use them, but I don't know of any that let you diff source trees that aren't in the same version control system, so I have no reason to expect that Monticello would do that, either.

You could make a single Monticello package with all code in an image, save that, and compare it to the same package in another image. E.g., install the attached file and save the "All" package, you get an MCZ of about 10 MB.

Also, having that allows fun queries:

(PackageInfo named: 'All') linesOfCode

- Bert -

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At Fri, 21 May 2010 21:35:14 -0600,

Clinton Blackmore wrote:
>
> Greetings.
>
> While I've programmed for some time, I am new to Squeak.  I was wondering how I diff or compare two images that are
> largely similar (such as, say, Scratch vs Scratch For Second Life).  
>
> In other environments, I'd run the source trees for each project/variation through a recursive diff tool -- Beyond
> Compare, Changes.app, Kompare, or even `diff` from the command line. How do I do something similar in Squeak?

 I made "ImageBrowser" while ago.  (It'd require a little bit of
adjustments for Scratch Images.)

http://map.squeak.org/package/92e8f376-ba20-4c38-8b3a-abfb2bf24624

 It traverses from the Smalltal dictionary in anoother image and
fetch the method source and read methods from other .changes file.
Then you can remove all identical methods.  So, it is basically a
browser for code in another image.

-- Yoshiki

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