aports@39bd5002

Multiple fixes and features

See merge request !60

assign default values early in dabuild

Packages dir is a docker volume and the mount point will be
automatically created. Permissions will be correct from entrypoint.

- set to true to enable named volume
- set to absolute path to enable bind mount

On Alpine (and also on other dists) its not safe to share the same
abuild.conf for multiple Alpine releases and architectures. Use the
users .abuild/abuild.conf instead.

- apk supports caching of packages for reuse on next run. This is the
  prefered way and should be relativly fast compared to other package
  magenagers. This also removed the need for other named volumes which
  need to be setup and maintained on each run.
- correcly set perm of volume mount points

dabuild: doh! actually use the indicated `$DABUILD_DOCKER` command

See merge request !58

Signed-off-by: Richard Mortier <mort@cantab.net>

add dabuild.conf support

See merge request !57

abuild-keygen will look for gitconfig to fetch user and email address
and set proper PACKAGER variable in abuild.conf

closes #51Signed-off-by: Richard Mortier <mort@cantab.net>

Signed-off-by: Richard Mortier <mort@cantab.net>

closes #48Signed-off-by: Richard Mortier <mort@cantab.net>

Signed-off-by: Richard Mortier <mort@cantab.net>

Closes #46Signed-off-by: Richard Mortier <mort@cantab.net>

This introduces support for ccache, when enabled in `abuild`.
Signed-off-by: Joseph Benden <joe@benden.us>

Closes #45Signed-off-by: Richard Mortier <mort@cantab.net>

Restored alpine docker genuinely supported architectures (as other ones are definitely not).
Just give a clue to set wanted DABUILD_ARCH variable at invocation, when uname does not provide adequate info on some platforms like Pi.

Signed-off-by: Richard Mortier <mort@cantab.net>