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Planet Debian

David Welton: Git is a Pain in the Ass

Posted: January 6th, 2009, 7:33pm CET

div pEveryone's been talking about how great and wonderful git is, and I've tried using it for a few projects of my own, on a local basis, sort of like an advanced form of 'rcs'. So I thought I'd try it out in a little bit more complicated setup, for a site I host on my web server. I want to have a main repository, that I check out (or 'clone', in git terms) on my laptop. My laptop can't be the main repository, because I also want to be able to commit from the web server (once in a while a quick live update is called for), so I need a stable address. Ok, I'll put it in my home directory on the web server, just to see how things work./p precodemkdir foobar cd foobar git init /code/pre pOk, so far so good. Now I try and clone it on my laptop, where I will then add files, commit, then push them./p pOops, that doesn't work. You can't clone an empty repository./p pOk, I add something on the server where I init'ed it, an empty file, just to give it some content. Now cloning it works on the laptop. Great, we're in business! I add a bunch of files from the project to the laptop repository, commit, then push them. Seems to be ok so far... I do a checkout on the remote/server machine, and I see my files. Good. Ok, let's try making a change on the laptop. I remove a file, commit it, push it (which is already an extra step compared to subversion... hrmph). I do a checkout on the server, but it won't erase the file I removed on the laptop. Weird. I google around a bit, and find that this is supposed to be for my own good, so I won't wreck things on the server. I need to do codegit reset --hard/code (which isn't a very reassuringly named command) there, and emthen/em a checkout, and now things work. /p pThat, however, is a lot of work just to commit and update stuff! I ask for some help on #git, where they mention the code--bare/code option to init. Since I'm just messing around, I go back and redo the init step, wiping the old repository. Now I try and clone that to start over again. Oops, I forgot, I can't clone it because it's empty. Grrrrrr.... this is getting annoying./p pSo, the kind folks on #git tell me I should push to the new server repository from one that's already populated. Ok, let's try setting up the laptop:/p precodegit init ... add/commit some files ... git remote add origin ...myurl... /code/pre pNow let's try pushing. Nope, still doesn't do it, I'm missing something. Frustrating. A bit more fiddling and googling, and i find:/p precodeget push origin master /code/pre pAha! It worked! Weird. And now a simple git push works too. The whole thing seems kind of shaky in the sense that it's not very confidence inspiring: I feel like it wouldn't take much to make a wrong turn and find all my files gone forever. I can see some of the advantages, and will likely stick with it - git is quite convenient for local files that I might not have bothered putting under version control in the past, but it's also a bit more bureaucratic in that you have more steps to do, and you have to fill in the forms just so... or else!/p /div

Planet Debian

David Welton: Git is a Pain in the Ass

Posted: January 6th, 2009, 7:33pm CET

div pEveryone's been talking about how great and wonderful git is, and I've tried using it for a few projects of my own, on a local basis, sort of like an advanced form of 'rcs'. So I thought I'd try it out in a little bit more complicated setup, for a site I host on my web server. I want to have a main repository, that I check out (or 'clone', in git terms) on my laptop. My laptop can't be the main repository, because I also want to be able to commit from the web server (once in a while a quick live update is called for), so I need a stable address. Ok, I'll put it in my home directory on the web server, just to see how things work./p precodemkdir foobar cd foobar git init /code/pre pOk, so far so good. Now I try and clone it on my laptop, where I will then add files, commit, then push them./p pOops, that doesn't work. You can't clone an empty repository./p pOk, I add something on the server where I init'ed it, an empty file, just to give it some content. Now cloning it works on the laptop. Great, we're in business! I add a bunch of files from the project to the laptop repository, commit, then push them. Seems to be ok so far... I do a checkout on the remote/server machine, and I see my files. Good. Ok, let's try making a change on the laptop. I remove a file, commit it, push it (which is already an extra step compared to subversion... hrmph). I do a checkout on the server, but it won't erase the file I removed on the laptop. Weird. I google around a bit, and find that this is supposed to be for my own good, so I won't wreck things on the server. I need to do codegit reset --hard/code (which isn't a very reassuringly named command) there, and emthen/em a checkout, and now things work. /p pThat, however, is a lot of work just to commit and update stuff! I ask for some help on #git, where they mention the code--bare/code option to init. Since I'm just messing around, I go back and redo the init step, wiping the old repository. Now I try and clone that to start over again. Oops, I forgot, I can't clone it because it's empty. Grrrrrr.... this is getting annoying./p pSo, the kind folks on #git tell me I should push to the new server repository from one that's already populated. Ok, let's try setting up the laptop:/p precodegit init ... add/commit some files ... git remote add origin ...myurl... /code/pre pNow let's try pushing. Nope, still doesn't do it, I'm missing something. Frustrating. A bit more fiddling and googling, and i find:/p precodeget push origin master /code/pre pAha! It worked! Weird. And now a simple git push works too. The whole thing seems kind of shaky in the sense that it's not very confidence inspiring: I feel like it wouldn't take much to make a wrong turn and find all my files gone forever. I can see some of the advantages, and will likely stick with it - git is quite convenient for local files that I might not have bothered putting under version control in the past, but it's also a bit more bureaucratic in that you have more steps to do, and you have to fill in the forms just so... or else!/p /div

Planet Debian

Uwe Hermann: Running homebrew and open-source software on your Wii, using the Twilight Hack and the Homebrew Channel

Posted: January 6th, 2009, 6:05pm CET

pa href=http://www.hermann-uwe.de/node/1430img src=http://www.hermann-uwe.de/files/images/wii.preview.jpg align=right height=427 width=320 alt=Wii hspace=5 //a/p pI've been owning a a href=http://en.wikipedia.org/wiki/WiiNintendo Wii/a for quite a while now, but so far only played an occasional game of tennis or the like. Over the holidays I got a href=http://en.wikipedia.org/wiki/The_Legend_of_Zelda:_Twilight_PrincessThe Legend of Zelda: Twilight Princess/a, which is a really nice game in itself. What is even more interesting though, is that this game allows you to run a href=http://en.wikipedia.org/wiki/Wii_homebrewhomebrew software/a on your Wii./p pWhat you usually want to do, is to use the so-called a href=http://wiibrew.org/wiki/Twilight_HackTwilight Hack/a to install the a href=http://wiibrew.org/wiki/Homebrew_ChannelHomebrew Channel/a on your Wii (you'll need an SD card and the Twilight Princess game for this). Once the process has finished you won't need the game anymore though./p pSo, here's a quick tutorial on how to install the Homebrew Channel. I basically followed the a href=http://wiibrew.org/wiki/Setting_up_your_Wii_for_HomebrewSetting up your Wii for Homebrew/a HOWTO from a href=http://wiibrew.orgwiibrew.org/a./p h2Requirements/h2 pAn SD card max. 2GB in size (strongnot/strong an SDHC card!), an SD card reader in your PC or laptop, and the Twilight Princess game (which you must play at least once)./p h2Backup/h2 pFirst, you'll want to backup your Twilight Princess save games (if any). For that, we format the SD card (it needs a FAT16/FAT32) filesystem./p pre $ strongmkfs.vfat /dev/mmcblk0p1/strong (you may need to change mmcblk0p1 to whatever fits your setup) /prep Now insert the SD card into the Wii, start the Wii, go to strongWii Options --gt; Data Management --gt; Save Data --gt; Wii/strong and copy your Twilight Princess save games onto the SD card. Then, poweroff, remove the SD card, insert it into your laptop/PC and copy the save games to a safe place./p pre $ strongmount -t vfat /dev/mmcblk0p1 /mnt/strong $ strongmv /mnt/private ~/zelda_savegames/strong /preh2Twilight Hack and Homebrew Channel/h2 pa href=http://www.hermann-uwe.de/photoblog/the-legend-of-zelda-twilight-princessimg src=http://www.hermann-uwe.de/files/images/zelda_twilight_princess.preview.jpg align=right height=120 width=160 alt=The Legend of Zelda: Twilight Princess hspace=5 //a/p pNext up: download the Twilight Hack and Homebrew Channel, and put the files on the SD card:/p pre $ strongwget http://hbc.hackmii.com/dist/twilight-hack-v0.1-beta1.zip/strong $ strongunzip twilight-hack-v0.1-beta1.zip/strong $ strongcp -r private /mnt/strong $ strongwget http://hbc.hackmii.com/dist/the_homebrew_channel-1.0.1.tar.gz/strong $ strongtar xfvz the_homebrew_channel-1.0.1.tar.gz/strong $ strongcp the_homebrew_channel-1.0.1/boot.dol /mnt/strong $ strongumount /mnt/strong /prep Now remove the SD card, insert it into the Wii and power-up the Wii. Go to strongWii Options --gt; Data Management --gt; Save Data --gt; Wii/strong, delete the Wii Twilight Princess save games, then copy the Twilight Hack save game from the SD card onto the Wii (you need to select the correct one a href=http://wiibrew.org/wiki/Setting_up_your_Wii_for_Homebrew#Twilight_Hackfor your region/a)./p pQuit the menu, start Twilight Princess, load the Twilight Hack savegame and finally talk to the person in front of you (do strongnot/strong perform any other actions, or the Wii may crash!). Follow the remaining instructions on the screen and you're done. You now have an additional channel named strongHomebrew Channel/strong where all your homebrew programs/games (and your own Free Software programs you may write/port) will appear./p h2Installing homebrew software/h2 pSo far, there are no real applications in the Homebrew Channel, you need to a href=http://wiibrew.org/wiki/Homebrew_Channel#Configuring_Applicationsput all the homebrew software you want on the SD card/a. There's a a href=http://wiibrew.org/wiki/List_of_homebrew_applicationshuuuge list/a of applications and games to choose from, many of them Free Software with source code, some however are binary-only./p pBasically, you put each application in a sub-directory of strongapps//strong on the SD card, the most important file in every sub-directory is always strongboot.dol/strong. If you have a strongboot.elf/strong file instead, you'll probably need to convert it using a href=http://wiibrew.org/wiki/ELF_to_DOL_ConverterELF to DOL converter/a./p h2Restoring Twilight Princess save games/h2 pYou may now want to restore your Twilight Princess save games onto the Wii, you no longer need the Twilight Hack save game. Put your strong~/zelda_savegames/strong directory on the SD card and name it strongprivate//strong again. Insert the SD card into the Wii and copy the save games on the Wii (similar procedure as above)./p pHave fun with homebrew software on your Wii, or even better write your own software or port existing Linux applications/games!/p

Planet Debian

Uwe Hermann: Running homebrew and open-source software on your Wii, using the Twilight Hack and the Homebrew Channel

Posted: January 6th, 2009, 6:05pm CET

pa href=http://www.hermann-uwe.de/node/1430img src=http://www.hermann-uwe.de/files/images/wii.preview.jpg align=right height=427 width=320 alt=Wii hspace=5 //a/p pI've been owning a a href=http://en.wikipedia.org/wiki/WiiNintendo Wii/a for quite a while now, but so far only played an occasional game of tennis or the like. Over the holidays I got a href=http://en.wikipedia.org/wiki/The_Legend_of_Zelda:_Twilight_PrincessThe Legend of Zelda: Twilight Princess/a, which is a really nice game in itself. What is even more interesting though, is that this game allows you to run a href=http://en.wikipedia.org/wiki/Wii_homebrewhomebrew software/a on your Wii./p pWhat you usually want to do, is to use the so-called a href=http://wiibrew.org/wiki/Twilight_HackTwilight Hack/a to install the a href=http://wiibrew.org/wiki/Homebrew_ChannelHomebrew Channel/a on your Wii (you'll need an SD card and the Twilight Princess game for this). Once the process has finished you won't need the game anymore though./p pSo, here's a quick tutorial on how to install the Homebrew Channel. I basically followed the a href=http://wiibrew.org/wiki/Setting_up_your_Wii_for_HomebrewSetting up your Wii for Homebrew/a HOWTO from a href=http://wiibrew.orgwiibrew.org/a./p h2Requirements/h2 pAn SD card max. 2GB in size (strongnot/strong an SDHC card!), an SD card reader in your PC or laptop, and the Twilight Princess game (which you must play at least once)./p h2Backup/h2 pFirst, you'll want to backup your Twilight Princess save games (if any). For that, we format the SD card (it needs a FAT16/FAT32) filesystem./p pre $ strongmkfs.vfat /dev/mmcblk0p1/strong (you may need to change mmcblk0p1 to whatever fits your setup) /prep Now insert the SD card into the Wii, start the Wii, go to strongWii Options --gt; Data Management --gt; Save Data --gt; Wii/strong and copy your Twilight Princess save games onto the SD card. Then, poweroff, remove the SD card, insert it into your laptop/PC and copy the save games to a safe place./p pre $ strongmount -t vfat /dev/mmcblk0p1 /mnt/strong $ strongmv /mnt/private ~/zelda_savegames/strong /preh2Twilight Hack and Homebrew Channel/h2 pa href=http://www.hermann-uwe.de/photoblog/the-legend-of-zelda-twilight-princessimg src=http://www.hermann-uwe.de/files/images/zelda_twilight_princess.preview.jpg align=right height=120 width=160 alt=The Legend of Zelda: Twilight Princess hspace=5 //a/p pNext up: download the Twilight Hack and Homebrew Channel, and put the files on the SD card:/p pre $ strongwget http://hbc.hackmii.com/dist/twilight-hack-v0.1-beta1.zip/strong $ strongunzip twilight-hack-v0.1-beta1.zip/strong $ strongcp -r private /mnt/strong $ strongwget http://hbc.hackmii.com/dist/the_homebrew_channel-1.0.1.tar.gz/strong $ strongtar xfvz the_homebrew_channel-1.0.1.tar.gz/strong $ strongcp the_homebrew_channel-1.0.1/boot.dol /mnt/strong $ strongumount /mnt/strong /prep Now remove the SD card, insert it into the Wii and power-up the Wii. Go to strongWii Options --gt; Data Management --gt; Save Data --gt; Wii/strong, delete the Wii Twilight Princess save games, then copy the Twilight Hack save game from the SD card onto the Wii (you need to select the correct one a href=http://wiibrew.org/wiki/Setting_up_your_Wii_for_Homebrew#Twilight_Hackfor your region/a)./p pQuit the menu, start Twilight Princess, load the Twilight Hack savegame and finally talk to the person in front of you (do strongnot/strong perform any other actions, or the Wii may crash!). Follow the remaining instructions on the screen and you're done. You now have an additional channel named strongHomebrew Channel/strong where all your homebrew programs/games (and your own Free Software programs you may write/port) will appear./p h2Installing homebrew software/h2 pSo far, there are no real applications in the Homebrew Channel, you need to a href=http://wiibrew.org/wiki/Homebrew_Channel#Configuring_Applicationsput all the homebrew software you want on the SD card/a. There's a a href=http://wiibrew.org/wiki/List_of_homebrew_applicationshuuuge list/a of applications and games to choose from, many of them Free Software with source code, some however are binary-only./p pBasically, you put each application in a sub-directory of strongapps//strong on the SD card, the most important file in every sub-directory is always strongboot.dol/strong. If you have a strongboot.elf/strong file instead, you'll probably need to convert it using a href=http://wiibrew.org/wiki/ELF_to_DOL_ConverterELF to DOL converter/a./p h2Restoring Twilight Princess save games/h2 pYou may now want to restore your Twilight Princess save games onto the Wii, you no longer need the Twilight Hack save game. Put your strong~/zelda_savegames/strong directory on the SD card and name it strongprivate//strong again. Insert the SD card into the Wii and copy the save games on the Wii (similar procedure as above)./p pHave fun with homebrew software on your Wii, or even better write your own software or port existing Linux applications/games!/p

Planet Debian

David Moreno: Returning an specific HTTP status/return code and content with mod_perl 2

Posted: January 6th, 2009, 5:35pm CET

img src=http://planet.debian.org/heads/damog.png width=64 height=95 alt= align=right style=float: right; pMaking a simple ttPerlResponseHandler/tt that does something like this:/p precodesub handler { my($r) = shift; $r-gt;content_type(text/plain); $r-gt;print(You suck.\n); return Apache2::Const::HTTP_BAD_REQUEST; }/code/pre p…doesn’t make what you’d be expecting. This is because mod_perl assumes, since you are specifying content type and something to print, that this is a legit and valid (200-ish) request. This is what you get:/p precode POST http://myserver/resource --gt; 200 OK Connection: close Date: Mon, 05 Jan 2009 23:02:57 GMT Content-Type: text/plain; charset=UTF-8 Client-Date: Mon, 05 Jan 2009 23:03:00 GMT Client-Response-Num: 1 Client-Transfer-Encoding: chunked [ some headers snipped ] You suck. lt;!DOCTYPE HTML PUBLIC -//IETF//DTD HTML 2.0//ENgt; lt;htmlgt;lt;headgt; lt;titlegt;200 OKlt;lt;/titlegt; lt;/headgt;lt;bodygt; lt;h1gt;OKlt;/h1gt; lt;pgt;Your browser sent a request that this server could not understand.lt;br /gt; lt;/pgt; lt;/bodygt;lt;/htmlgt; /code/pre pSo, yes, I was expecting to return a 400 Bad Request return with just “You suck” on the response body. mod_perl disagrees, which, kind of sucks if you are trying to make a RESTful service with mod_perl HTTP handlers and filters./p pTo avoid this behaviour, this is one way to go:/p precodesub handler { my($r) = shift; $r-gt;status(400); # or the one you are interested in $r-gt;content_type(text/plain); $r-gt;print(You suck.); return Apache2::Const::OK; } /code/pre pYou can also take a look at ttstatus_line/tt that overrides ttstatus/tt. You can also avoid the content_type method call if you are sloth enough. Now, this is what you get:/p precode GET https://myserver/resource --gt; 400 Bad Request Connection: close Date: Mon, 05 Jan 2009 23:27:08 GMT Content-Type: text/plain; charset=UTF-8 Client-Date: Mon, 05 Jan 2009 23:27:10 GMT Client-Peer: 209.234.249.38:443 Client-Response-Num: 1 [ some headers snipped img src=http://log.damog.net/wp-includes/images/smilies/icon_smile.gif alt=:) class=wp-smiley / ] You suck. /code/pre pAnd so, beer awaits./p

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Debian (5 unread)

Posted: January 6th, 2009, 7:33pm CET

Posted: January 6th, 2009, 7:33pm CET

Posted: January 6th, 2009, 6:05pm CET

Posted: January 6th, 2009, 6:05pm CET

Posted: January 6th, 2009, 5:35pm CET