[ISSUE] Meta-package dependency resolution

[ISSUE] Meta-package dependency resolution

[DBLouis]

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New issue by DBLouis on void-packages repository

https://github.com/void-linux/void-packages/issues/32631

Description:
I am having an issue with XBPS, not sure if this is the expected behavior or not.

Here is a minimal reproducible example:

```sh
# Template file for 'foobar'
pkgname=foobar
version=1
revision=1
build_style=meta
# cgmanager depends on dbus (could be anything depending on dbus)
# dbus-elogind is placed after, on purpose
depends="cgmanager dbus-elogind"
short_desc="whatever"
license="whatever"
homepage="whatever"
```

The following will attempt to install both `dbus` and `dbus-elogind` and eventually fail.

```sh
./xbps-src pkg foobar
xbps-install \
  -R https://alpha.de.repo.voidlinux.org/current \
  -R hostdir/binpkgs/test \
  -r "$(mktemp -d)" -S foobar
```

Installing directly does not fail and correctly replace `dbus` with `dbus-elogind`, no matter the order:

```sh
xbps-install \
  -R https://alpha.de.repo.voidlinux.org/current \
  -r "$(mktemp -d)" -S cgmanager dbus-elogind
```

Re: Meta-package dependency resolution

[github-actions]

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New comment by github-actions[bot] on void-packages repository

https://github.com/void-linux/void-packages/issues/32631#issuecomment-1144344962

Comment:
Issues become stale 90 days after last activity and are closed 14 days after that.  If this issue is still relevant bump it or assign it.

Re: [ISSUE] [CLOSED] Meta-package dependency resolution

[github-actions]

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Closed issue by DBLouis on void-packages repository

https://github.com/void-linux/void-packages/issues/32631

Description:
I am having an issue with XBPS, not sure if this is the expected behavior or not.

Here is a minimal reproducible example:

```sh
# Template file for 'foobar'
pkgname=foobar
version=1
revision=1
build_style=meta
# cgmanager depends on dbus (could be anything depending on dbus)
# dbus-elogind is placed after, on purpose
depends="cgmanager dbus-elogind"
short_desc="whatever"
license="whatever"
homepage="whatever"
```

The following will attempt to install both `dbus` and `dbus-elogind` and eventually fail.

```sh
./xbps-src pkg foobar
xbps-install \
  -R https://alpha.de.repo.voidlinux.org/current \
  -R hostdir/binpkgs/test \
  -r "$(mktemp -d)" -S foobar
```

Installing directly does not fail and correctly replace `dbus` with `dbus-elogind`, no matter the order:

```sh
xbps-install \
  -R https://alpha.de.repo.voidlinux.org/current \
  -r "$(mktemp -d)" -S cgmanager dbus-elogind
```

Re: Meta-package dependency resolution

[Chocimier]

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New comment by Chocimier on void-packages repository

https://github.com/void-linux/void-packages/issues/32631#issuecomment-1159541046

Comment:
This is expected. 
Xbps can replace already installed package with another package that has `provides` on it, but does not backtrack to solve conflict if virtual is added to transaction after real one.
Backtracking is hard, if you have a good idea of how to implement, send an RFC to xbps repo.