June 2015 - Pharo-users - lists.pharo.org

gtInspectorPresentation:, TreeModel, pragmas, visitors and polluting protocols
by Peter UhnÃ¡k June 22, 2015

June 22, 2015

Hi, I would like to describe some additional behavior for objects when they are interacting with another objects. The prime example is GTInspector; by default to add presentation you implement a method with "gtInspectorPresentationOrder:". This is fine if there is just one method like this, but when the object can serve multiple purposes it can quite mess up the protocol (in my opinion). Example of that could be (Spec) TreeModel; there are many methods like menu:, displayBlock:, childrenBlock: etc. that should be different based on the particular object. However having a method for each of those cases in the observed method is just a mess. So how could one approach this? The first thing that comes to my mind is a visitor. That might possibly work for code that I've written, but not for spotter/inspector as they work directly on the target object. Thanks, Peter

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PetitParser ignorable parsers
by Peter UhnÃ¡k June 22, 2015

June 22, 2015

Hi, is it possible to add such a parser that would consume input, but wouldn't return anything? Right now I do things like... MyParser>>rule ^ ($[ asParser, anotherRule, $] asParser) ==> [ :nodes | nodes second ] Of course when the rules are more complex, so is the block; however it seems that this is how it's done in the example parsers... So, would it be possible to add some kind of Null/Void/Ignore/Throwaway parser, that would consume the input, but would be omitted from the result? so the above method could be written as MyParser>>rule ^ $[ asNullPaser, anotherRule, $] asNullParser or MyParser>>rule ^ $[ asParser ignore, anotherRule, $[ asParser ignore or something else. Thanks, Peter

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crm in pharo?
by Tudor Girba June 21, 2015

June 21, 2015

Hi, Is there any CRM (customer relationship manager) library for Pharo? Cheers, Tudor -- www.tudorgirba.com "Every thing has its own flow"

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Visualizing a repository tree
by Offray Vladimir Luna CÃ¡rdenas June 21, 2015

June 21, 2015

Hi all, I had asked a similar question before with no much advances, but today I made a discovery that can improve the things a lot: how to export timeline data as structured JSON [1] (and of course this open the possibility to work with it on Pharo). Now I would like to graph the data as a tree with forks, merges and dates and authors of commits. I have seen chronia, but seems overkill for this feature (and is integrated with CVS only). [1] http://stackoverflow.com/questions/30577090/how-to-export-fossil-scm-timeli… As usual, any pointer on how to get this going will be greatly appreciated and I will give feedback to the community on how to do it. Cheers, Offray

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What would be the first code snippet you would show
by stepharo June 19, 2015

June 19, 2015

Hi For the mooc I have a lecture called Pharo Syntax in a nutshell and I would love to get a couple of simple examples that show the syntax but are not totally boring. I thought about something like ZnClient new url: 'http://localhost:8080/books/1'; formAt: 'author' put: 'SquareBracketAssociates'; formAt: 'title' put: 'Pharo For The Enterprise'; put Stef

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Woden-Roassal pharo5 inspector bugs
by Lusa Nicolas June 19, 2015

June 19, 2015

Hi, I just noticed that with today's pharo5 image the inspector breaks if Woden-Roassal is in the image. The reason is that there is a recursive call to String>>#findAnySubStr: startingAt: . This is caused by the deprecation of such method then defined as String>>#findAnySubstring: startingAt: . The first call gets the String>>#findAnySubStr: startingAt: which gives the warning and calls ByteString>>#findAnySubstring: startingAt: (in Woden-Roassal package) which calls String>>#findAnySubStr: startingAt: and so on. Now my question is, do you plan on moving Woden to Pharo5? Sorry to bother you all the time. Cheers, Nicolas

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Woden not loading anymore
by Lusa Nicolas June 18, 2015

June 18, 2015

Hi, it was a while that I wasn't updating the woden version that I am using in my project, so today I thought to give it a try and see if there was something new. And now I am not able to load woden anymore, what I get is the following error message: Error: Name not found: WithOpenGLAndExamples I am trying to load it into a fresh Pharo 4 image, but no way, it doesn't load. Here are the version and repository I am referring to when trying to load it: version: #jenkins; repository: 'http://smalltalkhub.com/mc/ronsaldo/Woden/main'. Does anyone know what's going on? Cheers, Nicolas

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Corrupted image after refactoring in class hierarchy
by Hilaire June 18, 2015

June 18, 2015

Hello, I am facing again this situation, with Pharo3, when the image becomes corrupted (crash at instanciation of a refactored class in a hierarchy). This time I have a log, it looks like a problem in ClassModification. Hilaire -- Dr. Geo http://drgeo.eu http://google.com/+DrgeoEu

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Monticello / OS deadlock ?
by Jose San Leandro June 18, 2015

June 18, 2015

Hi, In one of our projects we are using Pharo4. The image gets built by gradle, which loads the Metacello project. Sometimes, we see the build process hangs. It just don't progress. When adding local gitfiletree:// dependencies manually through Monticello after a while Pharo gets frozen. It's not always the same repository, it's not always the same number of repositories before it hangs. I launched the image with strace, and attached gdb to the frozen process. It turns out It's waiting for a lock that gets never released. The environment is a 64b Gentoo Linux with enough of everything (multiple monitors, multiple cores, enough RAM). I hope anybody could point me how to dig deeper into this. # gdb (gdb) attach [pid] [..] Reading symbols from /usr/lib32/libbz2.so.1...(no debugging symbols found)...done. Loaded symbols for /usr/lib32/libbz2.so.1 0x0809d8bb in signalSemaphoreWithIndex () (gdb) backtrace #0 0x0809d8bb in signalSemaphoreWithIndex () #1 0x0810868c in handleSignal () #2 <signal handler called> #3 0x0809d8c8 in signalSemaphoreWithIndex () #4 0x0809f0af in aioPoll () #5 0xf76f9671 in display_ioRelinquishProcessorForMicroseconds () from /home/chous/realhome/toolbox/pharo-5.0/pharo-vm/vm-display-X11 #6 0x080a1887 in ioRelinquishProcessorForMicroseconds () #7 0x080767fa in primitiveRelinquishProcessor () #8 0xb6fc838c in ?? () #9 0xb6fc3700 in ?? () #10 0xb7952882 in ?? () #11 0xb6fc3648 in ?? () (gdb) disassemble Dump of assembler code for function handleSignal: 0x081085e0 <+0>: sub $0x9c,%esp 0x081085e6 <+6>: mov %ebx,0x90(%esp) 0x081085ed <+13>: mov 0xa0(%esp),%ebx 0x081085f4 <+20>: mov %esi,0x94(%esp) 0x081085fb <+27>: mov %edi,0x98(%esp) 0x08108602 <+34>: movzbl 0x8168420(%ebx),%esi 0x08108609 <+41>: mov %ebx,%eax 0x0810860b <+43>: mov %esi,%edx 0x0810860d <+45>: call 0x81070d0 <forwardSignaltoSemaphoreAt> 0x08108612 <+50>: call 0x805aae0 <pthread_self@plt> 0x08108617 <+55>: mov 0x8168598,%edi 0x0810861d <+61>: cmp %edi,%eax 0x0810861f <+63>: je 0x8108680 <handleSignal+160> 0x08108621 <+65>: lea 0x10(%esp),%esi 0x08108625 <+69>: mov %esi,(%esp) 0x08108628 <+72>: call 0x805b330 <sigemptyset@plt> 0x0810862d <+77>: mov %ebx,0x4(%esp) 0x08108631 <+81>: mov %esi,(%esp) 0x08108634 <+84>: call 0x805b0c0 <sigaddset@plt> 0x08108639 <+89>: movl $0x0,0x8(%esp) 0x08108641 <+97>: mov %esi,0x4(%esp) 0x08108645 <+101>: movl $0x0,(%esp) 0x0810864c <+108>: call 0x805ada0 <pthread_sigmask@plt> 0x08108651 <+113>: mov %ebx,0x4(%esp) 0x08108655 <+117>: mov %edi,(%esp) 0x08108658 <+120>: call 0x805b240 <pthread_kill@plt> 0x0810865d <+125>: mov 0x90(%esp),%ebx 0x08108664 <+132>: mov 0x94(%esp),%esi 0x0810866b <+139>: mov 0x98(%esp),%edi 0x08108672 <+146>: add $0x9c,%esp 0x08108678 <+152>: ret 0x08108679 <+153>: lea 0x0(%esi,%eiz,1),%esi 0x08108680 <+160>: test %esi,%esi 0x08108682 <+162>: je 0x810865d <handleSignal+125> 0x08108684 <+164>: mov %esi,(%esp) 0x08108687 <+167>: call 0x809d8a0 <signalSemaphoreWithIndex> => 0x0810868c <+172>: jmp 0x810865d <handleSignal+125> End of assembler dump. (gdb) up 3 (gdb) disassemble Dump of assembler code for function signalSemaphoreWithIndex: 0x0809d8a0 <+0>: push %esi 0x0809d8a1 <+1>: xor %eax,%eax 0x0809d8a3 <+3>: push %ebx 0x0809d8a4 <+4>: sub $0x24,%esp 0x0809d8a7 <+7>: mov 0x30(%esp),%esi 0x0809d8ab <+11>: test %esi,%esi 0x0809d8ad <+13>: jle 0x809d918 <signalSemaphoreWithIndex+120> 0x0809d8af <+15>: mov $0x1,%edx 0x0809d8b4 <+20>: lea 0x0(%esi,%eiz,1),%esi 0x0809d8b8 <+24>: mfence 0x0809d8bb <+27>: mov $0x0,%eax 0x0809d8c0 <+32>: lock cmpxchg %edx,0x8152d80 => 0x0809d8c8 <+40>: mov %eax,0x1c(%esp) 0x0809d8cc <+44>: mov 0x1c(%esp),%eax 0x0809d8d0 <+48>: test %eax,%eax 0x0809d8d2 <+50>: jne 0x809d8b8 <signalSemaphoreWithIndex+24> 0x0809d8d4 <+52>: mov 0x8152d84,%edx 0x0809d8da <+58>: cmp $0x1ff,%edx 0x0809d8e0 <+64>: lea 0x1(%edx),%ebx 0x0809d8e3 <+67>: cmove %eax,%ebx 0x0809d8e6 <+70>: mov 0x8152d88,%eax 0x0809d8eb <+75>: cmp %ebx,%eax 0x0809d8ed <+77>: je 0x809d920 <signalSemaphoreWithIndex+128> 0x0809d8ef <+79>: mov 0x8152d84,%eax 0x0809d8f4 <+84>: mov %esi,0x8152da0(,%eax,4) 0x0809d8fb <+91>: mfence 0x0809d8fe <+94>: mov %ebx,0x8152d84 0x0809d904 <+100>: movl $0x0,0x8152d80 0x0809d90e <+110>: call 0x807c2c0 <forceInterruptCheck> 0x0809d913 <+115>: mov $0x1,%eax 0x0809d918 <+120>: add $0x24,%esp 0x0809d91b <+123>: pop %ebx 0x0809d91c <+124>: pop %esi 0x0809d91d <+125>: ret 0x0809d91e <+126>: xchg %ax,%ax 0x0809d920 <+128>: movl $0x810c888,(%esp) 0x0809d927 <+135>: movl $0x0,0x8152d80 0x0809d931 <+145>: call 0x80a3720 <error> 0x0809d936 <+150>: jmp 0x809d8ef <signalSemaphoreWithIndex+79> End of assembler dump. Meanwhile, strace gets frozen showing this: [..] clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f63665cd9d0) = 3736 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 rt_sigaction(SIGINT, {0x42a8a0, [], SA_RESTORER, 0x7f6365ba3ad0}, {SIG_DFL, [], SA_RESTORER, 0x7f6365ba3ad0}, 8) = 0 wait4(-1, 0x7ffc4ef7f7e8, 0, NULL) = ? ERESTARTSYS (To be restarted if SA_RESTART is set) --- SIGWINCH {si_signo=SIGWINCH, si_code=SI_KERNEL} --- wait4(-1,

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Grapher bug?
by Luc Fabresse June 17, 2015

June 17, 2015

Hi, The doc here [1] says: "Data points may be stacked, meaning that the index of the point in the collection is its X value." When I use the same example as in the doc but with labels and ticks: b := RTGrapher new. ds := RTStackedDataSet new. ds dotShape color: Color red. ds points: #(5 1 20 5). ds y: #yourself. b add: ds. b axisX noDecimal. b axisY noDecimal. b build. b view inspect it seems that y values are not aligned on x ones (i.e. I would expect the first red point to be 1@5). Is it a bug or did I misunderstood something? [image: Images intÃ©grÃ©es 2] [1] https://dl.dropboxusercontent.com/u/31543901/AgileVisualization/Grapher/020… Thanks, #Luc

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