I am trying to run pacman from a script. The problem is that a package should be installed that conflicts and provides, but not replaces a currently installed package. As answered here I passed the --noconfirm option and since pacman's stdin is not pointing to a tty it assumed the default answer which is no. How can I enforce pacman to answer yes to all questions? Please note that I can't pass any input to pacman (it's run via makechrootpkg) so I'm unable to use the yes command or similar as suggested here.

Here is the output of pacman:

loading packages...
resolving dependencies...
looking for conflicting packages...
:: libinput-ubuntu and libinput are in conflict. Remove libinput? [y/N] 
error: unresolvable package conflicts detected
error: failed to prepare transaction (conflicting dependencies)
  • If this is in a chroot, why do you have a conflict in the first place? – HalosGhost Apr 6 '16 at 16:43
  • @HalosGhost I am installing some packages into the chroot and makechrootpkg doesn't install them at once but one after another; so the conflicting package gets installed due to a dependency of another one I pass via the -I flag – msrd0 Apr 6 '16 at 16:53

Since there doesn't seem to be an option for achieving that, I looked into pacman source code and created a patch to add a --yes option to pacman: https://bugs.archlinux.org/task/48835

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