Generates a minimal Linux kernel source tree that actually builds. The code has been continued here: https://github.com/d33tah/minimal-kernel-build/

Dockerfile

# sudo docker buildx build . --output minified
FROM python:3.10 as source
WORKDIR /
RUN grep -v '^#' /etc/apt/sources.list | sed 's/deb /deb-src /' >> /etc/apt/sources.list
RUN apt-get update && apt-get install strace bc bison flex -y && apt-get build-dep -y linux-image-amd64
RUN wget -nv https://git.kernel.org/torvalds/t/linux-5.19-rc8.tar.gz
RUN tar xf linux-5.19-rc8.tar.gz
ADD linux-genlist.py .
RUN cd linux-5.19-rc8 && python3 ../linux-genlist.py
FROM scratch
COPY --from=source /linux-5.19-rc8 .

linux-genlist.py

import subprocess
import os
import pathlib

subprocess.check_call(
    'strace -fff -e trace=file -y -o strace.allnoconfig make allnoconfig', shell=True)
subprocess.check_call(
    'strace -fff -e trace=file -y -o strace.make make', shell=True)
subprocess.check_call('make mrproper', shell=True)

cwd = os.getcwd()

tokens = ['stat', 'lstat', 'execve']
b = set()
pdir = pathlib.Path('.')
for p in pdir.glob('strace*'):
    with open(str(p)) as f:
        for line in f:
            if line.endswith('>\n'):
                rev = line[::-1]
                x = rev.split('<')[0][::-1][:-2]
                b.add(x)
            else:
                for token in tokens:
                    if line.startswith(token + '("'):
                        x = pathlib.Path(line.split('"')[1])
                        b.add(str(x.absolute()))


a = {x.strip() for x in subprocess.check_output(
    'find `pwd` -type f', shell=True, encoding='utf8').splitlines()}
for x in a.difference(b):
    if x:
        os.unlink(x)