Re: Tip of the day. Don't clobber your files.
On Thu, 2005-10-20 at 21:05 +1300, Isaac Devine wrote: > Did you have a look at darcs? (www.darcs.net) It's fanastic! Heard of it, have not used it ☺ -- Michael JasonSmithhttp://ldots.org/
Re: Tip of the day. Don't clobber your files.
On 10/14/05, Michael JasonSmith <[EMAIL PROTECTED]> wrote: > On Fri, 2005-10-14 at 12:16 +1300, Glynn Foster wrote: > > Dunno about that - baz-ng is looking pretty interesting. > > > > http://www.bazaar-ng.org/ > > > > Obviously very early stages of development though. > > I was evaluating the systems to determine which should be used by the > third-year students, so the criteria included good documentation, > stability, and the ability to work with firewalls. While Bazaar looks > really nice, it may need to mature a bit :) > > -- > Michael JasonSmithhttp://ldots.org/ > > Did you have a look at darcs? (www.darcs.net) It's fanastic! Isaac
Re: Tip of the day. Don't clobber your files.
On Fri, 2005-10-14 at 12:16 +1300, Glynn Foster wrote: > Dunno about that - baz-ng is looking pretty interesting. > > http://www.bazaar-ng.org/ > > Obviously very early stages of development though. I was evaluating the systems to determine which should be used by the third-year students, so the criteria included good documentation, stability, and the ability to work with firewalls. While Bazaar looks really nice, it may need to mature a bit :) -- Michael JasonSmithhttp://ldots.org/
Re: Tip of the day. Don't clobber your files.
Hey, On Fri, 2005-10-14 at 11:48 +1300, Michael JasonSmith wrote: > On Fri, 2005-10-14 at 11:32 +1300, Hadley Rich wrote: > > Subversion to rule them all. > > I looked at a number of free version-control systems early this year and > came to the conclusion that Subversion was the best of the commonly > available (free) systems. Dunno about that - baz-ng is looking pretty interesting. http://www.bazaar-ng.org/ Obviously very early stages of development though. Glynn
Re: Tip of the day. Don't clobber your files.
On Fri, 2005-10-14 at 11:32 +1300, Hadley Rich wrote: > Subversion to rule them all. I looked at a number of free version-control systems early this year and came to the conclusion that Subversion was the best of the commonly available (free) systems. -- Michael JasonSmithhttp://ldots.org/
Re: Tip of the day. Don't clobber your files.
On Friday 14 October 2005 11:29, Christopher Sawtell wrote: > On Friday 14 October 2005 11:18, Carl Cerecke wrote: > > On 13/10/05, Christopher Sawtell <[EMAIL PROTECTED]> wrote: > > > On Thursday 13 October 2005 19:37, Derek Smithies wrote: > > > > Hi, > > > > > > > > On Thu, 13 Oct 2005, Carl Cerecke wrote: > > > > > Second Moral: Backups or version control systems are a Good Idea. > > > > > > Which one do you recommend? > > > > In most cases, both :-) > > Indeed, I was meaning which version control system? Subversion to rule them all. hads -- LSD melts in your mind, not in your hand.
Re: Tip of the day. Don't clobber your files.
On Friday 14 October 2005 11:18, Carl Cerecke wrote: > On 13/10/05, Christopher Sawtell <[EMAIL PROTECTED]> wrote: > > On Thursday 13 October 2005 19:37, Derek Smithies wrote: > > > Hi, > > > > > > On Thu, 13 Oct 2005, Carl Cerecke wrote: > > > > Second Moral: Backups or version control systems are a Good Idea. > > > > Which one do you recommend? > > In most cases, both :-) Indeed, I was meaning which version control system? -- CS
Re: Tip of the day. Don't clobber your files.
On 13/10/05, Christopher Sawtell <[EMAIL PROTECTED]> wrote: > On Thursday 13 October 2005 19:37, Derek Smithies wrote: > > Hi, > > > > On Thu, 13 Oct 2005, Carl Cerecke wrote: > > > Second Moral: Backups or version control systems are a Good Idea. > Which one do you recommend? In most cases, both :-)
Re: Tip of the day. Don't clobber your files.
On Friday 14 October 2005 10:56, Robert Himmelmann wrote: > pdumpfs. It uses hardlinks for multiple backups. Hey, that looks really good. Many thanks! -- CS
Re: Tip of the day. Don't clobber your files.
Christopher Sawtell wrote: On Thursday 13 October 2005 19:37, Derek Smithies wrote: Hi, On Thu, 13 Oct 2005, Carl Cerecke wrote: Second Moral: Backups or version control systems are a Good Idea. Which one do you recommend? pdumpfs. It uses hardlinks for multiple backups. pdumpfs --exclude=music /home/robert/ /data/backup/home/ >/data/backup/home/log 2>/data/backup/home/error-log Happy Hacking, Robert Himmelmann
Re: Tip of the day. Don't clobber your files.
On Friday 14 October 2005 09:00, Steve Holdoway wrote: > On Fri, October 14, 2005 7:36 am, Carl Cerecke wrote: > > On 13/10/05, Christopher Sawtell <[EMAIL PROTECTED]> wrote: > >> > >> putting an empty file named -i in a directory will save your sanity, and > >> the > >> possible amputation of your rh thumb, if you, by mistake, issue the > >> command > >> rm * .o > >> ^ > >> note the erroneous space > >> > > > > Trouble is, every other command on the command line that has a * gets > > a -i option sent to it as well. Also, is the shell guranteed to put > > the -i at the start of a glob expansion? I know different locales have > > different ordering (some are case-insensitive). > > > > Cheers, > > Carl. > > Alternalively, for a more global solution, add the following to your > /etc/profile ( or ~/.bash_profile for a more local solution )... > > alias cp='cp -i' > alias mv='mv -i' > alias rm='rm -i' > > and your sanity will be preserved. Well, actually, I find it gets annoying > after a while, I do too, so much so that I find that particular trick to be guaranteed to induce instant insanity. I loath and detest distributors who secretively change the documented behaviour of unix utilities. Thus the reason for my enthusiasm for the geriatric unix hacker's trick which I learnt off usenet more years ago that I wish to remember. > and end up using the -f flag instead, but then I'm stupid. -- CS
Re: Tip of the day. Don't clobber your files.
On Fri, October 14, 2005 7:36 am, Carl Cerecke wrote: > On 13/10/05, Christopher Sawtell <[EMAIL PROTECTED]> wrote: > >> >> putting an empty file named -i in a directory will save your sanity, and >> the >> possible amputation of your rh thumb, if you, by mistake, issue the >> command >> rm * .o >> ^ >> note the erroneous space >> > > Trouble is, every other command on the command line that has a * gets > a -i option sent to it as well. Also, is the shell guranteed to put > the -i at the start of a glob expansion? I know different locales have > different ordering (some are case-insensitive). > > Cheers, > Carl. > > Alternalively, for a more global solution, add the following to your /etc/profile ( or ~/.bash_profile for a more local solution )... alias cp='cp -i' alias mv='mv -i' alias rm='rm -i' and your sanity will be preserved. Well, actually, I find it gets annoying after a while, and end up using the -f flag instead, but then I'm stupid. $0.02, Steve -- Work like you don't need the money, Love like your heart has never been broken and Dance like no one can see you.
Re: Tip of the day. Don't clobber your files.
On Friday 14 October 2005 07:36, Carl Cerecke wrote: > On 13/10/05, Christopher Sawtell <[EMAIL PROTECTED]> wrote: > > > > putting an empty file named -i in a directory will save your sanity, and > > the possible amputation of your rh thumb, if you, by mistake, issue the > > command rm * .o > > ^ > > note the erroneous space > > > > Trouble is, every other command on the command line that has a * gets > a -i option sent to it as well. True, but I have yet to have any which have been upset by that, but I'm not using the command line unix utilities anything like as much as I used to. Have you had problems? > Also, is the shell guranteed to put > the -i at the start of a glob expansion? Probably not _guaranteed_ to, but I have yet to see it do any different in practice. Of course, the best way of implementing this would be to modify the rm utility so that it responded to the presence of a .keep file in the directory to add the functionality of the -i flag. > I know different locales have > different ordering (some are case-insensitive). -- CS
Re: Tip of the day. Don't clobber your files.
On 13/10/05, Christopher Sawtell <[EMAIL PROTECTED]> wrote: > > putting an empty file named -i in a directory will save your sanity, and the > possible amputation of your rh thumb, if you, by mistake, issue the command > rm * .o > ^ > note the erroneous space > Trouble is, every other command on the command line that has a * gets a -i option sent to it as well. Also, is the shell guranteed to put the -i at the start of a glob expansion? I know different locales have different ordering (some are case-insensitive). Cheers, Carl.
Re: Tip of the day. Don't clobber your files.
On Oct 13, 2005, at 7:37 PM, Derek Smithies wrote: yes, I know of one commercial linux provider who has his entire /etc directory in CVS. Not a bad idea. I tend to use CDR myself but I don't update anything in /etc very often. On the day I accidentally typed: rm -rf /etc/* when I meant: rm -rf /mnt/etc/* I was saved by two factors: 1) my server was short of memory which made it quite slow, so it'd only removed a handful of files by the time I hit ^C, 2) I had another Linux machine handy that I could use to compare directories and copy files from. For my real work I'm using Subversion. Compared to my old revision control system, which consisted of numbered .zip files and a changelog, it's absolute bliss. - Dave
Re: Tip of the day. Don't clobber your files.
Excellent idea Chris. I use this myself to protect important files from accidental deletion. However using the command; touch -i to create a file named -i creates an error. This is easily solved by using the double minus option. This tells the shell to interpret anything following as an argument even though it looks like an option. Thus the command; touch -- -i will create a zero length file named -i without error. Hint view this text with a fixed width font, variable width fonts run the double minuses together making them appear as one. On Thu, 13 Oct 2005 20:32, Christopher Sawtell wrote: > > putting an empty file named -i in a directory will save your sanity, and > the possible amputation of your rh thumb, if you, by mistake, issue the > command rm * .o > ^ > note the erroneous space >
Re: Tip of the day. Don't clobber your files.
On Thursday 13 October 2005 19:37, Derek Smithies wrote: > Hi, > > On Thu, 13 Oct 2005, Carl Cerecke wrote: > > Second Moral: Backups or version control systems are a Good Idea. Which one do you recommend? > yes, > I know of one commercial linux provider who has his entire /etc directory > in CVS. putting an empty file named -i in a directory will save your sanity, and the possible amputation of your rh thumb, if you, by mistake, issue the command rm * .o ^ note the erroneous space -- CS
Re: Tip of the day. Don't clobber your files.
Hi, On Thu, 13 Oct 2005, Carl Cerecke wrote: > > Second Moral: Backups or version control systems are a Good Idea. > yes, I know of one commercial linux provider who has his entire /etc directory in CVS. = One of those laws: there are two times when you can test the quality of your backup systems. a)before disaster happens b)after disaster happens. Derek. -- Derek Smithies Ph.D. Any fool can write code that IndraNet Technologies Ltd.a computer can understand. Email: [EMAIL PROTECTED] Good programmers write code ph +64 3 365 6485 that humans can understand. Web: http://www.indranet-technologies.com/Martin Fowler
Tip of the day. Don't clobber your files.
Had a bunch of python scripts in a directory. They all needed some munging. It was too complicated for my sed skills, so I wrote a python script to munge the python scripts. Here's how I ran it: for f in UC*.py; do cp $f $f.orig; ./munge $f.orig > $f; echo $f; done Only problem was, the script was called munge.py, not munge, so I got a whole bunch of: bash: ./munge: No such file or directory Oops. up-arrow twice to previous command and change to ./munge.py: for f in UC*.py; do cp $f $f.orig; ./munge.py $f.orig > $f; echo $f; done Just about to hit return, when I decided to quickly check the directory listing. Yep. Every file matching UC*.py was of zero length. If I had run the correct version, It would have copied the zero-length version over the $f.orig version, and all would have been lost! Except, of course, the files are in a version control system, so all would not have been lost. Moral of the story: The shell interprets shell redirects, not the program. Even if the program fails, the redirect (such as > foo) will create a zero-length foo, clobbering any existing foo. I think you can turn off this useful feature with a noclobber option in the shell. Second Moral: Backups or version control systems are a Good Idea. Cheers, Carl.
