misc: add misc/rebuild-stubs-with-podman files

misc/rebuild-stubs-with-podman/10-create-image.sh

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+#! /usr/bin/env bash
+## vim:set ts=4 sw=4 et:
+set -e; set -o pipefail
+argv0=$0; argv0abs="$(readlink -fn "$argv0")"; argv0dir="$(dirname "$argv0abs")"
+
+# create the image from Dockerfile
+# using a rootless Podman container
+
+image=upx-stubtools-20210104-v1
+
+podman build -t "$image" -f "$argv0dir/Dockerfile" "$argv0dir"
+
+podman image list "$image"
+podman image tree "$image"

misc/rebuild-stubs-with-podman/20-image-run-shell.sh

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+#! /usr/bin/env bash
+## vim:set ts=4 sw=4 et:
+set -e; set -o pipefail
+argv0=$0; argv0abs="$(readlink -fn "$argv0")"; argv0dir="$(dirname "$argv0abs")"
+
+# run an interactive shell in the image
+# using a rootless Podman container
+
+image=upx-stubtools-20210104-v1
+
+flags=( -ti --read-only --rm )
+flags+=( --cap-drop=all )
+flags+=( --network=none )
+flags+=( --user 2000 )
+# map container user 0 to 1, and map container user 2000 to current host user
+flags+=( --uidmap=0:1:1 --uidmap=2000:0:1 )
+flags+=( -w /home/upx )
+flags+=( -e TERM="$TERM" )
+# NOTE: we mount the upx top-level directory read-write under /home/upx/src/upx
+flags+=( -v "${argv0dir}/../..:/home/upx/src/upx:rw" )
+
+podman run "${flags[@]}" "$image" bash -l
+
+# now we can rebuild the UPX stubs:
+#   cd /home/upx/src/upx/src/stub
+#   # make sure that git is clean:
+#   git status .
+#   # remove stub files and make sure that they got deleted:
+#   make clean
+#   git status .
+#   # rebuild
+#   make all
+#   # make sure that the stub files did rebuild correctly:
+#   git status .
+#   git diff .

misc/rebuild-stubs-with-podman/Dockerfile

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+FROM docker.io/library/ubuntu:22.04
+ARG DEBIAN_FRONTEND=noninteractive
+ENV LANG=C.UTF-8
+
+# install system packages
+RUN dpkg --add-architecture i386 \
+    && apt-get update && apt-get upgrade -y \
+    && apt-get install -y --no-install-recommends \
+        aria2 ca-certificates git less libmpc3 libncurses5 make \
+        ncurses-term perl-base python2-minimal xz-utils \
+        libc6:i386 zlib1g:i386 \
+    && true
+
+# manually install compat libs from Ubuntu 16.04
+RUN cd /root \
+    && aria2c --checksum=sha-256=2605f43f8047fc972855bb909f1dd7af761bbfd35ae559ad689b0d55a4236d69 \
+              'http://mirror.enzu.com/ubuntu/pool/main/g/gmp/libgmp10_6.1.0+dfsg-2_amd64.deb' \
+    && aria2c --checksum=sha-256=3973a97387bbe0e8a775995c22861d8478edee2a594e8117970f635de25b2c8a \
+              'http://mirror.enzu.com/ubuntu/pool/main/m/mpfr4/libmpfr4_3.1.4-1_amd64.deb' \
+    && mkdir packages \
+    && for f in ./*.deb; do dpkg -x $f ./packages; done \
+    && mv -v -n ./packages/usr/lib/x86_64-linux-gnu/lib* /usr/lib/x86_64-linux-gnu/ \
+    && rm -rf ./*.deb ./packages \
+    && ldconfig \
+    && true
+
+# install upx-stubtools into /usr/local/bin/bin-upx-20210104
+RUN cd /root \
+    && aria2c --checksum=sha-256=abcd8337cc656fe68d7bbb2ffe0f1e5ddce618688aa0e18c1ebcc40072843884 \
+              'https://github.com/upx/upx-stubtools/releases/download/v20210104/bin-upx-20210104.tar.xz' \
+    && cd /usr/local/bin \
+    && tar -xJf /root/bin-upx-20210104.tar.xz \
+    && rm /root/bin-upx-20210104.tar.xz \
+    && true
+
+# create default user upx 2000:2000
+RUN useradd upx -U --uid 2000 --shell /bin/bash -m \
+    && mkdir -p /home/upx/.local/bin /home/upx/src/upx \
+    && ln -s /usr/local/bin/bin-upx-20210104 /home/upx/.local/bin/bin-upx \
+    && chown -R upx:upx /home/upx \
+    && true
+USER upx