Now that we have sparse file support, libarchive wants to use it.

APK doesn't support sparse file entries in tar files, so it fails to
install any package made in this manner.

Samuel Holland authored Jan 19, 2022 and A. Wilcox committed Jan 19, 2022

On filesystems such as XFS, abuild will skip small files and symlinks
because the file fits in an inode and shows a size of 0.

Signed-off-by: A. Wilcox <AWilcox@Wilcox-Tech.com>
Acked-by: Zach van Rijn <me@zv.io>

Add interposition fixes for use with APK Foundry

See merge request !5

Occasionally, a package will use the $srcdir environment variable for
its own purposes and change its behavior during build if it is set.
This is not normally a problem since $srcdir is not normally exported by
abuild. However, if $srcdir is inherited from the environment in order
to override its default value of $startdir/src, it will continue to be
inherited and thus confuse those packages. Instead, check for
$ABUILD_SRCDIR. Likewise for $pkgbasedir and $ABUILD_PKGBASEDIR for
consistency sake.

This is the only appearance of `apk` in the source.  Appears accidental.

Fixes: 41343329

 ("abuild: fix dependency tracing for cross builds")
Signed-off-by: A. Wilcox <AWilcox@Wilcox-Tech.com>

abuild, abuild-keygen: drop echo -n as well

See merge request !4

tests: fix newapkbuild tests

See merge request !2

* Do not use the -n option for newapkbuild_simple_test: since commit
  a68354eb, this option is not allowed
  when providing PKGNAME[-PKGVER] (i.e. not SRCURL) as the final
  argument.
* Use newapkbuild from the working tree, not whatever is in $PATH.

POSIX me harder

See merge request !3

According to POSIX, the "command -v" form of command(1) accepts only a
single argument (command_name). Some shells will check additional
arguments, but not dash.