Smaller CI intermediate tarballs (option 2) #375
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The seed tarball is created as early as possible, to minimize its size.
- libtool needs autoconf (& possibly other autotools) at make time, to generate correct & reproducible manpages - musl-1.1.24 shouldn't nuke /usr/include in its src_install(), as it will remove headers used by other packages later, notably perl. (Also, touching the live filesystem in src_install() will be skipped if the package is preseeded instead, causing inconsistency.)
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This is a different option for making CI tarballs smaller: we revert to using a small seed tarball, plus packages built in each pass. The seed tarball is built as early as possible (i.e. right after we have bash), everything beyond that is passed in the form of repo packages.
To make this work properly, in each pass, rootfs.py needs to be run once for each previous pass to preseed from, and once more for the current pass.
This option depends on #368.