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We dont want wolors enabled when output is a file or a pipe

its included with alpine-iso

is provided from mkinitfs

it was unmaintained

Those are now provided from lua-aports

Some projects use the svn revision in the version number.
svn co brings back the revision number but increases the archive size.

apk fetch --stdout will mix the progress bar with data output. We work
around this by run it in quiet mode.

Patch from Andrew Manison.

ref #626

This works around a bug in busybox 1.22.0 that makes 'grep -w ^' hang.
It is triggered when there are no deps. (eg. musl)

It means that home built packages cannot be installed with abuild-apk
unless the key is installed system-wide.

This option will make buildrepo continue build even if some package
fails. It is an 'build what you can' option.

The ABUILD_BLACKLIST can be used to give abuild a list of packages that
is known to fail to build. This can be used to reduce build retries
when building many/all packages recursively.

fi the signing key is missing we will fail. Rather than fail after
compile we check existance of signing keys before we start.

fixes #2270

This is supposed to be used in abuild only to make it possible to exit
with error early, before package is built, in case the signing key is
missing.