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#!/usr/bin/env bash
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Copyright (C) 2026 Bryan Joshua Pedini
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# fake apt-get (unit tests). Scenario: FAKE_APT_SIM=fixture|held|real|none|purge (data/apt/sim-*.txt).
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# Purge simulation: installed = the "ii" rows of data/apt/dpkg-status.tsv; reverse dependencies from
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# data/apt/purge-rdeps.txt; pre-existing orphans from data/apt/autoremovable.txt (added by
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# --auto-remove, which is system-wide like the real one); FAKE_APT_AUTO_ORPHANS="pkg:dep ..." are
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# the auto-installed dependencies a purge of pkg orphans; FAKE_APT_SIM_EXTRA="pkg:other ..." makes a
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# simulated purge of pkg also remove other (a dependent apt-cache rdepends did not report).
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# shellcheck source=../fakelib.bash
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. "${BASH_SOURCE[0]%/*}/../fakelib.bash"
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fake_log "$@"
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args=" $* "
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D=$FAKE_DATA/apt
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installed() { grep -q "^.i *"$'\t'"$1"$'\t' "$D/dpkg-status.tsv" && ! fake_purged "$1"; }
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orphans() { while IFS= read -r o; do installed "$o" && printf '%s\n' "$o"; done <"$D/autoremovable.txt"; }
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# purge_set [--auto-remove] NAME...: the packages a purge removes, sorted
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purge_set() {
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local auto=0 n r line
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if [[ $1 == --auto-remove ]]; then
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auto=1
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shift
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fi
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{
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for n in "$@"; do
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installed "$n" || continue
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echo "$n"
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while IFS= read -r line; do
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[[ $line == "$n: "* ]] || continue
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for r in ${line#*: }; do installed "$r" && echo "$r"; done
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done <"$D/purge-rdeps.txt"
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if ((auto)); then
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for r in ${FAKE_APT_AUTO_ORPHANS:-}; do [[ ${r%%:*} == "$n" ]] && installed "${r#*:}" && echo "${r#*:}"; done
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fi
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for r in ${FAKE_APT_SIM_EXTRA:-}; do [[ ${r%%:*} == "$n" ]] && installed "${r#*:}" && echo "${r#*:}"; done
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done
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if ((auto)); then orphans; fi
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} | sort -u
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}
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case $args in
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*' update '*)
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rc=$(fake_rc FAKE_APT_UPDATE_RC 0)
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if ((rc)); then
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echo "E: Failed to fetch http://deb.debian.org/debian/dists/bookworm/InRelease Temporary failure resolving 'deb.debian.org'" >&2
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echo "E: Some index files failed to download. They have been ignored, or old ones used instead." >&2
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fi
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exit "$rc"
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;;
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*' -s '*autoremove*)
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while IFS= read -r o; do [[ -n $o ]] && echo "Remv $o [1.0]"; done < <(orphans)
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exit 0
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;;
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*' -s '*purge*)
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names=()
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auto=()
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for a in "$@"; do
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case $a in --auto-remove) auto=(--auto-remove) ;; -* | purge) ;; *) names+=("$a") ;; esac
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done
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rc=$(fake_rc FAKE_APT_SIM_PURGE_RC 0)
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if ((rc)); then
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echo "E: Unable to correct problems, you have held broken packages." >&2
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exit "$rc"
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fi
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for n in "${names[@]}"; do
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if ! grep -q $'\t'"$n"$'\t' "$D/dpkg-status.tsv" && [[ $n != su-dummy-newdep ]]; then
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echo "E: Unable to locate package $n" >&2
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exit 100
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fi
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done
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while IFS= read -r p; do [[ -n $p ]] && echo "Purg $p [1.0]"; done < <(purge_set "${auto[@]}" "${names[@]}")
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exit 0
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;;
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*' -s '*' upgrade '*)
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f=$D/sim-${FAKE_APT_SIM:-fixture}.txt
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while IFS= read -r line; do
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name=
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case $line in Inst\ * | Conf\ *) name=${line#* }; name=${name%% *} ;; esac
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if [[ -n $name ]] && fake_purged "$name"; then continue; fi
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if [[ $line == ' '* && -f $FAKE_DIR/purged ]]; then
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while IFS= read -r p; do line=${line//$p/}; done <"$FAKE_DIR/purged"
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fi
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printf '%s\n' "$line"
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done <"$f"
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exit 0
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;;
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*' upgrade '*)
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echo "holds during upgrade: $(sort "$FAKE_DIR/holds" 2>/dev/null | tr '\n' ' ')" >>"$FAKE_LOG"
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# which of our lock files does the package manager have open (it must have none)?
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if [[ -d /proc/$$/fd ]]; then
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n=0
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for fd in "/proc/$$/fd"/*; do
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[[ $(readlink "$fd" 2>/dev/null) == *.lock ]] && n=$((n + 1))
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done
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echo "lock fds in the upgrade: $n" >>"$FAKE_LOG"
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fi
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if [[ -n ${FAKE_APT_UPGRADE_KILL:-} ]]; then
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kill -s "$FAKE_APT_UPGRADE_KILL" "$PPID"
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sleep 0.2
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fi
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if [[ -n ${FAKE_KILL_READER:-} ]]; then
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# close the applet's stdout: kill the process reading it, then keep writing
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pid=$(cat "$FAKE_DIR/reader.pid")
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kill -9 "$pid"
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while kill -0 "$pid" 2>/dev/null; do sleep 0.05; done
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fi
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echo "Reading package lists..." 2>/dev/null
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echo "0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded." 2>/dev/null
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exit "$(fake_rc FAKE_APT_UPGRADE_RC 0)"
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;;
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*' purge '*)
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rc=$(fake_rc FAKE_APT_PURGE_RC 0)
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if ((rc == 0)); then
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for a in "$@"; do case $a in -* | purge) ;; *) fake_mark_purged "$a" ;; esac; done
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# FAKE_APT_PURGE_ALSO: packages that disappear although the plan did not name them
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read -r -a also <<<"${FAKE_APT_PURGE_ALSO:-}"
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((${#also[@]} == 0)) || fake_mark_purged "${also[@]}"
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else
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echo "E: Held packages were changed and -y was used without --allow-change-held-packages." >&2
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fi
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exit "$rc"
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;;
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esac
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echo "fake apt-get: unhandled: $*" >&2
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exit 99
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