Re: How to properly set up reminders for paying cellphone fees in org?
On 2020-05-02, at 10:12, to...@tuxteam.de wrote: > On Sat, May 02, 2020 at 09:37:40AM +0200, Marcin Borkowski wrote: >> >> On 2020-04-30, at 07:02, Kyle Meyer wrote: >> >> > And note that a utility like datefudge or libfaketime is useful for >> > testing these sorts of things out. For example: >> > >> > $ datefudge "2020-02-18" emacs [...] >> >> Shameless plug: I wrote about this use-case of datefudge sime time ago: >> http://mbork.pl/2019-08-05_datefudge_and_agenda_testing >> >> (I don't know libfaketime). > > It just plays games with LD_PRELOAD to trick the application (which is > supposed to use the usual libs when asking for time, but most do that). > > Infinitely more lightweight than a container or a VM. On Debian: > > tomas@trotzki:~$ apt show libfaketime > Package: libfaketime > [...] > Download-Size: 31.2 kB > APT-Sources: http://ftp.de.debian.org/debian buster/main amd64 Packages > Description: Report faked system time to programs (preload library) >The Fake Time Preload Library (FTPL, a.k.a. libfaketime) intercepts >various system calls which programs use to retrieve the current date >and time [...] FTPL allows you to specify both absolute dates (e.g., >2004-01-01) and relative dates (e.g., 10 days ago). > > You might need a VM for an app which bypasses the "usual libraries", > but then, I don't know whether I would like to have such a thing on > my box. Probably not without a good reason :-) One use-case when this might be reasonable is an application which talks to a database, when you have to convince both the application and the database server that the time is different than in reality. Best, -- Marcin Borkowski http://mbork.pl
Re: How to properly set up reminders for paying cellphone fees in org?
On Sat, May 02, 2020 at 09:37:40AM +0200, Marcin Borkowski wrote: > > On 2020-04-30, at 07:02, Kyle Meyer wrote: > > > And note that a utility like datefudge or libfaketime is useful for > > testing these sorts of things out. For example: > > > > $ datefudge "2020-02-18" emacs [...] > > Shameless plug: I wrote about this use-case of datefudge sime time ago: > http://mbork.pl/2019-08-05_datefudge_and_agenda_testing > > (I don't know libfaketime). It just plays games with LD_PRELOAD to trick the application (which is supposed to use the usual libs when asking for time, but most do that). Infinitely more lightweight than a container or a VM. On Debian: tomas@trotzki:~$ apt show libfaketime Package: libfaketime [...] Download-Size: 31.2 kB APT-Sources: http://ftp.de.debian.org/debian buster/main amd64 Packages Description: Report faked system time to programs (preload library) The Fake Time Preload Library (FTPL, a.k.a. libfaketime) intercepts various system calls which programs use to retrieve the current date and time [...] FTPL allows you to specify both absolute dates (e.g., 2004-01-01) and relative dates (e.g., 10 days ago). You might need a VM for an app which bypasses the "usual libraries", but then, I don't know whether I would like to have such a thing on my box. Probably not without a good reason :-) Cheers -- t signature.asc Description: Digital signature
Re: How to properly set up reminders for paying cellphone fees in org?
On 2020-04-30, at 07:02, Kyle Meyer wrote: > And note that a utility like datefudge or libfaketime is useful for > testing these sorts of things out. For example: > > $ datefudge "2020-02-18" emacs [...] Shameless plug: I wrote about this use-case of datefudge sime time ago: http://mbork.pl/2019-08-05_datefudge_and_agenda_testing (I don't know libfaketime). Another way of testing that is using a VM or perhaps docker to run Emacs in an environment where you set up the system clock to whatever you want. Best, -- Marcin Borkowski http://mbork.pl
Re: How to properly set up reminders for paying cellphone fees in org?
Vladimir Nikishkin writes: > However, the manual node you're pointing to disagrees with the claim that > those are equivalent: > >>If you need both a repeater and a special warning period in a deadline >>entry, the repeater should come first and the warning period last >> DEADLINE: <2005-10-01 Sat +1m -3d> Thanks for pointing that out. AFAICT things work fine if you swap them, but it's best to follow the manual's recommendation here.
Re: How to properly set up reminders for paying cellphone fees in org?
Ah, great, thanks! I have been looking at the wrong node all the time. However, the manual node you're pointing to disagrees with the claim that those are equivalent: >If you need both a repeater and a special warning period in a deadline >entry, the repeater should come first and the warning period last > DEADLINE: <2005-10-01 Sat +1m -3d> However, the manual may be incomplete. Thank you, problem seems to be solved. Kyle Meyer 於 2020年4月30日 週四 13:02 寫道： > Vladimir Nikishkin writes: > > > I need to pay a fee by every 28th of the month, and I want this task > > to show up in the agenda from the 20th of the next not paid month. > > > > What's the proper DEADLINE format? > > > > DEADLINE: <2020-02-28 Sun .+1m -10d> ? > > DEADLINE: <2020-02-28 Sun -10d .+1m> ? > > Those are equivalent. Though you might consider whether you'd prefer > '+' or '++' for this rather than '.+'. See (info "(org)Repeated tasks") > if you're not aware of the differences. > > And note that a utility like datefudge or libfaketime is useful for > testing these sorts of things out. For example: > > $ datefudge "2020-02-18" emacs [...] >
Re: How to properly set up reminders for paying cellphone fees in org?
Vladimir Nikishkin writes: > I need to pay a fee by every 28th of the month, and I want this task > to show up in the agenda from the 20th of the next not paid month. > > What's the proper DEADLINE format? > > DEADLINE: <2020-02-28 Sun .+1m -10d> ? > DEADLINE: <2020-02-28 Sun -10d .+1m> ? Those are equivalent. Though you might consider whether you'd prefer '+' or '++' for this rather than '.+'. See (info "(org)Repeated tasks") if you're not aware of the differences. And note that a utility like datefudge or libfaketime is useful for testing these sorts of things out. For example: $ datefudge "2020-02-18" emacs [...]
