The previous idea was to use virtual packages in the users configuration
to satisfy dependencies by mapping them to existing installed packages.
Using virtual packages for it doesn't work as expected and trying to make
it work would break other functionalities of virtual packages, like the
version satisfaction checks for `provides` and the ability to replace
virtual packages with real packages. The virtual package functionality
should be used exclusively for virtual packages.
This allows users to specify packages packages that should be ignored.
Ignored packages in dependencies are always satisfied without installing
the package, while updating or installing a package that depends on an
ignored package.
This does NOT ignore the shlib checks, ignoring a package that provides
required shared libraries will abort the transaction as if there was no
package that provides the required shared library.
If a package that is going to be installed or updated contains invalid
dependencies return ENXIO and XBPS_STATE_INVALID_DEP xbps state to clients.
This improves the error messages returned to the clients when such
condition happens.
If dependency is installed but does not satisfy the requirements, mark it
as an update and not install. The commit 869466278b changed the logic
for virtual and non virtual packages.
Before that change the code would do the following:
1- if dependency is installed, continue
2- if dependency is queued, continue
3- get dependency from repos
After that change the code does this:
1- if dependency is queued, continue
2- if dependency is installed, continue
3- get dependency from repos
So the dependency is checked if it has been queued as the first phase, which
seems to be the most common path in most cases.
The issue was that xbps_pkgdb_get_pkg() did not find any package,
and the code was free(3)ing heap allocated memory before checking for
errno. I suspect that free(3) has touched errno and this errno value
has been propagated to the next code.
Found after a bit of testing on repo.voidlinux.eu.
To put a package on hold mode:
$ xbps-pkgdb -m hold foo
To unhold the package:
$ xbps-pkgdb -m unhold foo
To list packages on hold mode:
$ xbps-query -H
This also close#12 from github.
The list of required external deps is now confuse, libarchive and openssl.
libxbps now includes a wrapper for proplib prefixed with xbps_ rather than prop_.
