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improve maybe-* hook conditions

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This commit is contained in:
Johannes Schauer Marin Rodrigues 2023-01-20 07:07:58 +01:00
parent 104fba0256
commit fb1e5c32e6
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1
3 changed files with 70 additions and 24 deletions
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23
hooks/maybe-jessie-or-older/extract00.sh
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@ -2,15 +2,24 @@
set -eu set -eu
# if dpkg is new enough, do nothing # we need to check the version of dpkg
# we cannot ask dpkg-query about the version because dpkg is only extracted # since at this point packages are just extracted but not installed, we cannot use dpkg-query
# but not installed at this point # since we want to support chrootless, we cannot run dpkg --version inside the chroot
dpkg_ver="$(chroot "$1" dpkg --version | grep --extended-regexp --only-matching '[0-9]+\.[0-9.]+')" # to avoid this hook depending on dpkg-dev being installed, we do not parse the extracted changelog with dpkg-parsechangelog
if dpkg --compare-versions "$dpkg_ver" ge 1.17.11; then # we also want to avoid parsing the changelog because /usr/share/doc might've been added to dpkg --path-exclude
echo "dpkg version $dpkg_ver is >= 1.17.11 -- not running jessie-or-older extract00 hook" >&2 # instead, we just ask apt about the latest version of dpkg it knows of
# this should only fail in situations where there are multiple versions of dpkg in different suites
ver=$(env --chdir="$1" APT_CONFIG="$MMDEBSTRAP_APT_CONFIG" apt-cache show --no-all-versions dpkg 2>/dev/null | sed -ne 's/^Version: \(.*\)$/\1/p' || printf '')
if [ -z "$ver" ]; then
echo "no package called dpkg can be installed -- not running jessie-or-older extract00 hook" >&2
exit 0
fi
if dpkg --compare-versions "$ver" ge 1.17.11; then
echo "dpkg version $ver is >= 1.17.11 -- not running jessie-or-older extract00 hook" >&2
exit 0 exit 0
else else
echo "dpkg version $dpkg_ver is << 1.17.11 -- running jessie-or-older extract00 hook" >&2 echo "dpkg version $ver is << 1.17.11 -- running jessie-or-older extract00 hook" >&2
fi fi
# resolve the script path using several methods in order: # resolve the script path using several methods in order:

44
hooks/maybe-jessie-or-older/extract01.sh
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@ -2,18 +2,44 @@
set -eu set -eu
# If the init package has not been extracted, then it is not part of the # The jessie-or-older extract01 hook has to be run up to the point where the
# Essential:yes set and we do not need this workaround. This holds true for the # Essential:yes field was removed from the init package (with
# init package version 1.34 and later. Instead of asking apt about the init # init-system-helpers 1.34). Since the essential packages have only been
# version (which might not be the same version that was picked to be installed) # extracted but not installed, we cannot use dpkg-query to find out its
# we check for the presence of the init package by checking whether # version. Since /usr/share/doc might be missing due to dpkg --path-exclude, we
# /usr/share/doc/init/copyright exists. # also cannot check whether /usr/share/doc/init/copyright exists. There also
# was a time (before init-system-helpers 1.20) where there was no init package
# at all where we also want to apply this hook. So we just ask apt about the
# candidate version for init-system-helpers. This should only fail in
# situations where there are multiple versions of init-system-helpers in
# different suites.
ver=$(env --chdir="$1" APT_CONFIG="$MMDEBSTRAP_APT_CONFIG" apt-cache show --no-all-versions init-system-helpers 2>/dev/null | sed -ne 's/^Version: \(.*\)$/\1/p' || printf '')
if [ -z "$ver" ]; then
# there is no package called init-system-helpers, so either:
# - this is so old that init-system-helpers didn't exist yet
# - we are in a future where init-system-helpers doesn't exist anymore
# - something strange is going on
# we should only call the hook in the first case
ver=$(env --chdir="$1" APT_CONFIG="$MMDEBSTRAP_APT_CONFIG" apt-cache show --no-all-versions base-files 2>/dev/null | sed -ne 's/^Version: \(.*\)$/\1/p' || printf '')
if [ -z "$ver" ]; then
echo "neither init-system-helpers nor base-files can be installed -- not running jessie-or-older extract01 hook" >&2
exit 0
fi
if [ -e "$1/usr/share/doc/init/copyright" ]; then # Jessie is Debian 8
echo "the init package is not Essential:yes -- not running jessie-or-older extract01 hook" >&2 if dpkg --compare-versions "$ver" ge 8; then
echo "there is no init-system-helpers but base-files version $ver is >= 8 -- not running jessie-or-older extract01 hook" >&2
exit 0 exit 0
else else
echo "the init package is Essential:yes -- running jessie-or-older extract01 hook" >&2 echo "there is no init-system-helpers but base-files version $ver is << 8 -- running jessie-or-older extract01 hook" >&2
fi
else
if dpkg --compare-versions "$ver" ge 1.34; then
echo "init-system-helpers version $ver is >= 1.34 -- not running jessie-or-older extract01 hook" >&2
exit 0
else
echo "init-system-helpers version $ver is << 1.34 -- running jessie-or-older extract01 hook" >&2
fi
fi fi
# resolve the script path using several methods in order: # resolve the script path using several methods in order:

23
hooks/maybe-merged-usr/essential00.sh
View file

@ -2,13 +2,24 @@
set -eu set -eu
# if the usr-is-merged package cannot be installed with apt, do nothing ver=$(dpkg-query --root="$1" -f '${db:Status-Status} ${Source} ${Version}' --show usr-is-merged 2>/dev/null || printf '')
if ! env --chdir="$1" APT_CONFIG="$MMDEBSTRAP_APT_CONFIG" apt-cache show --no-all-versions usr-is-merged > /dev/null 2>&1; then case "$ver" in
echo "no package called usr-is-merged found -- not running merged-usr essential hook" >&2 '')
echo "no package called usr-is-merged is installed -- not running merged-usr essential hook" >&2
exit 0 exit 0
else ;;
echo "package usr-is-merged found -- running merged-usr essential hook" >&2 'installed mmdebstrap-dummy-usr-is-merged 1')
fi echo "dummy usr-is-merged package installed -- running merged-usr essential hook" >&2
;;
'installed usrmerge '*)
echo "usr-is-merged package from src:usrmerge installed -- not running merged-usr essential hook" >&2
exit 0
;;
*)
echo "unexpected situation for package usr-is-merged: $ver" >&2
exit 1
;;
esac
# resolve the script path using several methods in order: # resolve the script path using several methods in order:
# 1. using dirname -- "$0" # 1. using dirname -- "$0"