On Sun, Jun 15, 2025 at 09:31:45AM +0200, Anders Andersson wrote: > On Sun, Jun 15, 2025 at 7:45 AM Nicholas Geovanis > <[email protected]> wrote: > > > > > > > > On Sat, Jun 14, 2025, 9:15 PM Boyan Penkov <[email protected]> wrote: > >> > >> Hello folks, > >> > >> I'm wiring to ask how to get apt to run a script after a particular > >> package is installed or updated. Am I looking for dpkg-triggers or > >> some apt conf? > >> > >> Specifically, I have GRUB installed to *every* drive, with the > >> expectation that all but one drives can fail and the machine will > >> still boot (to something...). To this end, after I see apt has > >> updated grub, I manually run something like: > >> ``` > >> sudo update-grub > >> sudo grub-install /dev/sda > >> sudo grub-install /dev/sdb > >> sudo update-grub > >> ``` > >> I'd like to automate this; if grub is changed, run this script > >> automatically. > > > > > > You could easily do this with ansible. In perhaps 30 lines of YAML you > > could install those fixes, and do the grub work in the same ansible source > > file. Repeatable the next time you have fixes to install, just run that > > playbook again with 1 command. > > First of all, 30 lines to automate 2-4 lines is absurd. You have a > hammer, don't recommend it to people who need a screwdriver!
OK, here is the screwdriver (from man apt.conf(5)):
Pre-Invoke, Post-Invoke
This is a list of shell commands to run before/after
invoking dpkg(1). Like options this must be specified
in list notation. The commands are invoked in order
using /bin/sh; should any fail APT will abort.
(Those are in the DPkg section, so probably their full name is
DPkg::Post-Invoke, etc).
There seems to be also a Post-Invoke-Success hook, not documented in
the man page. From skimming the internet it seems to live Apt::Update
namespace (possibly it's just called once for a whole bunch of updates?).
Perhaps this would be worth a bug report against the APT doc, what do
you think?
Cheers
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