96 lines
2.5 KiB
Bash
96 lines
2.5 KiB
Bash
#!/bin/bash
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set -euo pipefail
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#set -x
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dir="/tmp/null"
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rm -rf "$dir"
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mkdir "$dir"
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cd "$dir"
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# Add all arguments as the initial core packages
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printf '%s\n' "$@" > keep
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# Packages required for a shell environment
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cat >>keep <<EOF
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bash
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coreutils-single
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EOF
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# Disallow list to block certain packages and their dependencies
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cat >disallow <<EOF
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alsa-lib
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copy-jdk-configs
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cups-libs
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chkconfig
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info
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gawk
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platform-python
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platform-python-setuptools
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python3
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python3-libs
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python3-pip-wheel
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python3-setuptools-wheel
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p11-kit
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EOF
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sort -u keep -o keep
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echo "==> Installing packages into chroot" >&2
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set -x
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# Install requirements for this script (xargs and cmp)
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dnf install -y findutils diffutils
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# Install core packages to chroot
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rootfs="$(realpath rootfs)"
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mkdir -p "$rootfs"
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<keep xargs dnf install -y --installroot "$rootfs" --releasever 8 --setopt install_weak_deps=false --nodocs
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dnf --installroot "$rootfs" clean all
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rm -rf "$rootfs"/var/cache/* "$rootfs"/var/log/dnf* "$rootfs"/var/log/yum.*
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{ set +x; } 2>/dev/null
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echo "==> Building dependency tree" >&2
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# Loop until we have the full dependency tree (no new packages found)
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touch old
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while ! cmp -s keep old
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do
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# 1. Get requirement names (not quite the same as package names)
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# 2. Filter out any install-time requirements
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# 3. Query which packages are being used to satisfy the requirements
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# 4. Keep just their package names
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# 5. Remove packages that are on the disallow list
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# 6. Store result as an allowlist
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<keep xargs rpm -r "$rootfs" -q --requires | sort -Vu | cut -d ' ' -f1 \
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| grep -v -e '^rpmlib(' \
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| xargs -d $'\n' rpm -r "$rootfs" -q --whatprovides \
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| grep -v -e '^no package provides' \
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| sed -r 's/^(.*)-.*-.*$/\1/' \
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| grep -vxF -f disallow \
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> new || true
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# Safely replace the keep list, appending the new names
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mv keep old
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cat old new > keep
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# Sort and deduplicate so cmp will eventually return true
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sort -u keep -o keep
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done
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# Determine all packages that need to be removed
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rpm -r "$rootfs" -qa | sed -r 's/^(.*)-.*-.*$/\1/' | sort -u > all
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# Set complement (all - keep)
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grep -vxF -f keep all > remove
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echo "==> $(wc -l remove | cut -d ' ' -f1) packages to erase:" >&2
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cat remove
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echo "==> $(wc -l keep | cut -d ' ' -f1) packages to keep:" >&2
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cat keep
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echo "" >&2
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echo "==> Erasing packages" >&2
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# Delete all packages that aren't needed for the core packages
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set -x
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<remove xargs rpm -r "$rootfs" --erase --nodeps --allmatches
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{ set +x; } 2>/dev/null
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echo "" >&2
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echo "==> Packages erased ok!" >&2
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