- Pharo-users - lists.pharo.org

Re: [Pharo-users] Force headless mode

by Cyril Ferlicot

On Wed, Sep 27, 2017 at 9:21 AM, Stephane Ducasse <stepharo.self(a)gmail.com> wrote: > What is important is to understand the ratio attacker vs. defense. > It is important not to be paranoid. > - against who are you protect yourself? > - if you do not ship source code (or if you ofuscate it) > - you can try remove the decompiler I do not think that people will do much. > Now again how much time and for what? > > Stef > We are taking this into consideration. We have several solutions and we will implement te one with the best implementation time/protection ratio. Thank you for the pointers. -- Cyril Ferlicot https://ferlicot.fr http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

Sept. 27, 2017

Re: [Pharo-users] Force headless mode

by Cyril Ferlicot

On Tue, Sep 26, 2017 at 8:03 PM, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > Out of curiosity... how does enforcing headlessness protects code? Wouldn't > it be still accessible via e.g. TelePharo, or startup script override, or > anything? > > Peter > > This is a first step. This is not all we will do but it is a step making it hard for people who do not know Pharo to access the code. There is no solution that would protect us at 100%, so we want a list of solutions fast to implement and covering a large part of the way to access to the code. -- Cyril Ferlicot https://ferlicot.fr http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

Sept. 27, 2017

Re: [Pharo-users] Force headless mode

by Cyril Ferlicot

On Tue, Sep 26, 2017 at 7:04 PM, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: > > > Why not do as follows: > > (1) add some startup code inside the image that tests if the image is running headless, if not exit > (2) remove some of the command line handlers (especially the ones that execute or load code) > > Problem is that you will lock yourself out as well ;-) > > Thank you Sven. We used your solution (1) and it is indeed a good solution. Solution (2) was already in our todo list :) -- Cyril Ferlicot https://ferlicot.fr http://www.synectique.eu 2 rue Jacques PrÃ©vert 01, 59650 Villeneuve d'ascq France

Sept. 27, 2017

Re: [Pharo-users] How to include DeployUtils in a Configuration?

by Thierry Goubier

Hi HernÃ¡n, I think what is happening is you're not including completely the DeployUtils baseline. You need to write something like: spec baseline: 'DeployUtils' with: [ spec repository: 'github://fstephany/DeployUtils/repository']; import: 'DeployUtils'. And have one of the packages (or groups?) of DeployUtils listed as dependency of one of your packages. Regards, Thierry 2017-09-25 20:19 GMT+02:00 HernÃ¡n Morales Durand <hernan.morales(a)gmail.com>: > I am trying to include DeployUtils in a ConfigurationOf (Pharo 6.1) > following instructions at: > > https://github.com/fstephany/DeployUtils > > If I include the dependency as suggested: > > spec baseline: 'DeployUtils' with: [ > spec repository: 'github://fstephany/DeployUtils/repository']. > > then when I load the configuration I get: > > Error: Unable to resolve project package for 'DeployUtils'. It is > likely that that the configuration referencing this project will not > validate properly (see MetacelloToolBox > class>>validateConfiguration:). > > If I include the dependency as: > > spec > project: 'DeployUtils' with: [ > spec > className: #DeployUtils; > versionString: 'baseline'; > repository: 'github://fstephany/DeployUtils/repository' > ]; > > Then I get DU multiple missing dependencies: > > This package depends on the following classes: > StringStreamLogger > Log > StdoutStreamLogger > You must resolve these dependencies before you will be able to load > these definitions: > DUFileLogger > DUFileLogger>>#withFileLocator: > DUFileLogger>>#addLogHook: > DUFileLogger>>#defaultFormatter > DUFileLogger>>#defaultStream > DUFileLogger>>#fileLocator: > DUStdoutStreamLogger > DUStdoutStreamLogger>>#addLogHook: > Log>>#debug:tag: > Log>>#info:tag: > Log>>#warning:tag: > > And finally a MNU with > > #loader: was sent to nil > > (also when I try to inspect I got a #gtInspectorProjectsIn: was sent to > nil) > Any ideas? > Cheers, > > HernÃ¡n > >

Sept. 27, 2017

Re: [Pharo-users] How to find if a method is being executed in a given process

by Stephane Ducasse

Ah ok.... So you should look at what Pablo did because he is handling this case for code update, the idea is that he will put on the stack a kind of notifier so that you get aware when the m is not on the stack anymore. Stef On Mon, Sep 25, 2017 at 6:05 PM, Steven Costiou <steven.costiou(a)kloum.io> wrote: > Le 2017-09-25 17:47, Stephane Ducasse a Ã©crit : > > This is exactly my usecase, i need to remove code that may be called > by a method on the stack - and i know exactly which method. However my > base hypothesis is that it is in an already running process (maybe a > loop) and that part i cannot change. Is there an existing Pharo > implementation of MethodWrappers ? > > How can you remove a method if it may be called? > > Stef > > Lets say i have the following method: > > m > > ^self m1 > > I have dynamically changed the code of m for a specific object o by the > following: > > m > > self m2. > > ^self m1 > > m2 is behavior that is dynamically added to the object o. > > If i want to revert the object o to its original behavior, that will change > back m and remove m2, i must be sure that the changed m is not on the stack, > else it could still call m2 that no longer exists. > > Actually i tried Ben's suggestion, and it works. I just ask the process to > run until the method i target is popped out of the stack and then i can > remoev my code. > > Steven.

Sept. 27, 2017

Re: [Pharo-users] How to include DeployUtils in a Configuration?

by Stephane Ducasse

Hi hernan Are you creating a configurationOf or a baselineOf? Do you have the Log and StringStreamLogger in your image? Because I have the impression that they are not in the DeployUtils package. Are the classes coming from the SystemLogger we wrote with Norbert? Because if this is the case you should add this dependency. Stef On Mon, Sep 25, 2017 at 8:19 PM, HernÃ¡n Morales Durand <hernan.morales(a)gmail.com> wrote: > I am trying to include DeployUtils in a ConfigurationOf (Pharo 6.1) > following instructions at: > > https://github.com/fstephany/DeployUtils > > If I include the dependency as suggested: > > spec baseline: 'DeployUtils' with: [ > spec repository: 'github://fstephany/DeployUtils/repository']. > > then when I load the configuration I get: > > Error: Unable to resolve project package for 'DeployUtils'. It is > likely that that the configuration referencing this project will not > validate properly (see MetacelloToolBox > class>>validateConfiguration:). > > If I include the dependency as: > > spec > project: 'DeployUtils' with: [ > spec > className: #DeployUtils; > versionString: 'baseline'; > repository: 'github://fstephany/DeployUtils/repository' ]; > > Then I get DU multiple missing dependencies: > > This package depends on the following classes: > StringStreamLogger > Log > StdoutStreamLogger > You must resolve these dependencies before you will be able to load > these definitions: > DUFileLogger > DUFileLogger>>#withFileLocator: > DUFileLogger>>#addLogHook: > DUFileLogger>>#defaultFormatter > DUFileLogger>>#defaultStream > DUFileLogger>>#fileLocator: > DUStdoutStreamLogger > DUStdoutStreamLogger>>#addLogHook: > Log>>#debug:tag: > Log>>#info:tag: > Log>>#warning:tag: > > And finally a MNU with > > #loader: was sent to nil > > (also when I try to inspect I got a #gtInspectorProjectsIn: was sent to nil) > Any ideas? > Cheers, > > HernÃ¡n >

Sept. 27, 2017

Re: [Pharo-users] X11 options on Ubuntu VM / Athens rendering problems

by Stephane Ducasse

Hi jeff you should give a try so that you can push esteban in his fight for a free host and strong SDL2.0 Stef On Mon, Sep 25, 2017 at 7:51 AM, ClÃ©ment Bera <bera.clement(a)gmail.com> wrote: > > > On Mon, Sep 25, 2017 at 2:33 AM, J.F. Rick <self(a)je77.com> wrote: >> >> Hi Clement and and Stef, >> >> thanks for sharing. The video looks cool and it seems like a >> high-performance approach. Unfortunately, it doesn't seem to be working in >> Linux. I'm attaching the Pharo debug file, but it seems like the Handler >> being OSNullWindowHandle indicates a problem. I'm also not sure that this >> approach would allow me to do fullscreen apps. I noticed that your video >> shows a title bar in MacOS. >> > > I've never made the demo work on linux, I am not surprised it doesn't work. > This demo is based on the Pharo 4 OSWindow version, and more recent versions > are working fine on linux. > > About fullscreen as I said in the previous mail it is possible to enable it, > I tried it worked, but I did not do it as I don't think it make sense with > this game. > > I will consider in the future making it work on the latest Pharo version on > multiple OS if it makes sense to show people how to do it. I'm busy with > other concerns right now. > > Anyway, it's just one approach, you can use another one. > >> >> Cheers, >> >> Jeff >> >> >> >> >> >> On Sun, Sep 24, 2017 at 7:53 AM ClÃ©ment Bera <bera.clement(a)gmail.com> >> wrote: >>> >>> Hi, >>> >>> I describe in the next paragraphs what I do to build application with >>> Pharo at 50 fps. Now I am using a SDL2 window with OSWindow and not the >>> default Pharo window for rendering. There is a fullscreen option with >>> OSWindow, I don't use it but I've just tried it works fine. >>> >>> To use Athens/Cairo I start the VM headless and I open from the code a >>> window using the SDL2 binding (OSWindow), then I extract the window surface >>> as a cairo surface to draw on it using Athens and I use SDL2 to manage >>> events (mouse, keyboard). That way I don't even start morphic/WorldMorph >>> which wastes cpu ressources. >>> >>> I built this video game that way: >>> >>> https://clementbera.wordpress.com/2016/08/29/sdl2-cairo-headless-for-realti… >>> https://www.youtube.com/watch?v=srPdFgbyS6s >>> >>> The game is running in Pharo 4 (pre-Spur). I configured it to run at 50 >>> fps but from time to time some frames are dropped for performance so I would >>> say it is running at around 48-49 fps in practice. I think it should work on >>> the latest Pharo but you need to ask on pharo-dev how to use OSWindow. Some >>> APIs have changed since Pharo 4. Since the latest Pharo version is now using >>> Spur I expect the performance to be way better and I think 50 fps is >>> definitely manageable on a laptop. >>> >>> Note that this is still Pharo so if you want something which looks >>> real-time you need to be careful about you object allocation rate in-between >>> frame rendering. >>> >>> I hope this can help. >>> >>> Regards >>> >>> >>> >>> On Sun, Sep 24, 2017 at 9:43 AM, Stephane Ducasse >>> <stepharo.self(a)gmail.com> wrote: >>>> >>>> Hi jeff >>>> >>>> let us know if this is working. the start.sh script is not working on >>>> my machine. but clement made it worked on his machine and he should >>>> publish a zip. >>>> >>>> Stef >>>> >>>> >>>> >>>> On Sun, Sep 24, 2017 at 9:39 AM, Stephane Ducasse >>>> <stepharo.self(a)gmail.com> wrote: >>>> > Yes I will share a dropbox with you for now. >>>> > >>>> > On Sat, Sep 23, 2017 at 9:44 PM, J.F. Rick <self(a)je77.com> wrote: >>>> >> Hi Stef, >>>> >> >>>> >> since I'm only doing Athens rendering, it might be possible to do a >>>> >> native >>>> >> window implementation. That said, I don't know how to get started >>>> >> with that. >>>> >> Documentation seems to be hard to find. The last time I saw any work >>>> >> on that >>>> >> it was too early to be usable. I'm also not sure if it solves my "it >>>> >> needs >>>> >> to run in fullscreen at full speed" problem. If someone like Clement >>>> >> could >>>> >> get me started, that would be awesome. >>>> >> >>>> >> Cheers, >>>> >> >>>> >> Jeff >>>> >> >>>> >> On Fri, Sep 22, 2017 at 12:27 PM Stephane Ducasse >>>> >> <stepharo.self(a)gmail.com> >>>> >> wrote: >>>> >>> >>>> >>> Hi Jeff >>>> >>> >>>> >>> Nice to see you. I do not know anybody running on X11. Esteban is >>>> >>> working on better SDL20 integration. >>>> >>> Did you try having a native window? I asked clement if he could >>>> >>> release the Wizard Battle Arena because it was a game he did in a >>>> >>> couple of days (yes he is good this guy) and that use cairo athens >>>> >>> based for drawing on native window. >>>> >>> >>>> >>> stef >>>> >>> >>>> >>> On Fri, Sep 22, 2017 at 3:11 PM, J.F. Rick <self(a)je77.com> wrote: >>>> >>> > I'm running a fullscreen Pharo application on Ubuntu and I've >>>> >>> > noticed >>>> >>> > that >>>> >>> > Athens rendering gets way worse (maybe 10 updates per second) when >>>> >>> > I >>>> >>> > switch >>>> >>> > to fullscreen mode from inside Pharo. Ideally, I'd love for that >>>> >>> > to be >>>> >>> > fixed. >>>> >>> > >>>> >>> > In lieu of that, it would be cool if I could just maximize Pharo >>>> >>> > to the >>>> >>> > size >>>> >>> > of the screen to achieve good performance. Two things stop that: >>>> >>> > the >>>> >>> > Unity >>>> >>> > application bar and the title-bar. For the former, I can configure >>>> >>> > Unity >>>> >>> > to >>>> >>> > hide it. I noticed a '-notitle' X11 option when I execute pharo >>>> >>> > -help. >>>> >>> > I've >>>> >>> > tried using these X11 options and neither -notitle or -fullscreen >>>> >>> > seem >>>> >>> > to >>>> >>> > have any effect. Here's the command I run: >>>> >>> > >>>> >>> > ./bin/pharo --encoding utf8 -vm-display-X11 -fullscreen >>>> >>> > PATH_TO_IMAGE & >>>> >>> > >>>> >>> > Pharo starts fine but neither option seems to have any effect. >>>> >>> > I've also >>>> >>> > tried this in GNOME, thinking that Unity was the problem. Again, >>>> >>> > no >>>> >>> > effect. >>>> >>> > >>>> >>> > Any suggestions? >>>> >>> > >>>> >>> > Jeff >>>> >>> > >>>> >>> > >>>> >>> >>>> >> >>>> >>> >

Sept. 27, 2017

Scraping HTML chapter 2 (soon chapter 3 coming)

by Stephane Ducasse

I came with the idea of this booklet thank to Peter Kenny that kindly answered a question on the Pharo mailing-list. To help, Peter showed to a Pharoer how to scrap a web site using XPath. In addition, some years ago I was maintaining Soup a scraping framework because I was scraping magic web sites and I wanted an application to manage my magic cards. Since then I always wanted to try XPath and in addition I wanted to offer this booklet to Peter. Why because I asked Peter if he would like to write something and he told that he was at a great age where he would not take any commitment. I realised that I would like to get as old as him and be able to hack like a mad in Pharo with new technology. So this booklet is a gift to Peter, a great and gentle Pharoer. Stef

Sept. 27, 2017

Re: [Pharo-users] Force headless mode

by Stephane Ducasse

What is important is to understand the ratio attacker vs. defense. It is important not to be paranoid. - against who are you protect yourself? - if you do not ship source code (or if you ofuscate it) - you can try remove the decompiler I do not think that people will do much. Now again how much time and for what? Stef On Tue, Sep 26, 2017 at 8:03 PM, Peter UhnÃ¡k <i.uhnak(a)gmail.com> wrote: > Out of curiosity... how does enforcing headlessness protects code? Wouldn't > it be still accessible via e.g. TelePharo, or startup script override, or > anything? > > Peter > > On Tue, Sep 26, 2017 at 7:04 PM, Sven Van Caekenberghe <sven(a)stfx.eu> wrote: >> >> >> > On 26 Sep 2017, at 18:06, Cyril Ferlicot <cyril.ferlicot(a)gmail.com> >> > wrote: >> > >> > On Tue, Sep 26, 2017 at 5:59 PM, Esteban Lorenzano <estebanlm(a)gmail.com> >> > wrote: >> >> >> >> >> >> it is not. >> >> specially on windows. >> >> >> >> vm handles the creation of host window and you will always have one. >> >> >> >> nowâ¦ if you wait one week, I will have ready the (experimental) real >> >> headless VMs. In my tests, they are working fine but we will still need to >> >> work when we want to actually start a world windowâ¦ but thatâs another story >> >> ;) >> >> >> > >> > I don't think we can wait Pharo 7 before doing this task. But I can >> > still try it when you're done. >> > >> > With this, will it be possible to totally disable the non headless >> > mode in production? >> >> Why not do as follows: >> >> (1) add some startup code inside the image that tests if the image is >> running headless, if not exit >> (2) remove some of the command line handlers (especially the ones that >> execute or load code) >> >> Problem is that you will lock yourself out as well ;-) >> >> >> Esteban >> >> >> >> >> >> >> > >> > >> > >> > -- >> > Cyril Ferlicot >> > https://ferlicot.fr >> > >> > http://www.synectique.eu >> > 2 rue Jacques PrÃ©vert 01, >> > 59650 Villeneuve d'ascq France >> > >> >> >

Sept. 27, 2017

Scraping HTML chapter 2 (soon 3 will be done :)

by Stephane Ducasse

I came with the idea of this booklet thank to Peter that kindly answered a question on the Pharo mailing-list. To help Peter showed to a Pharoer how to scrap the web site mentioned using XPath. In addition, some years ago I was maintaining Soup a scraping framework because I want to write an application to manage my magic cards. Since then I always wanted to try XPath and in addition I wanted to offer this booklet to Peter. Why because I asked Peter if he would like to write something and he told that he was at a great age where he would not take any commitment. I realised that I would like to get as old as him and be able to hack like a mad in Pharo with new technology. So this booklet is a gift to Peter, a great and gentle Pharoer. Stef

Sept. 26, 2017