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create-utils.sh

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+#!/bin/sh
+
+# General build dependencies: gawk grep lz4 zstd curl gcc make autoconf
+# 	libtool pkgconf libcap fuse2 (or fuse3) lzo xz zlib findutils musl
+#	kernel-headers-musl sed
+#
+# Dwarfs build dependencies: fuse2 (or fuse3) openssl jemalloc
+# 	xxhash boost lz4 xz zstd libarchive libunwind google-glod gtest fmt
+#	gflags double-conversion cmake ruby-ronn libevent libdwarf git utf8cpp
+#
+
+set -eu
+
+export CC=clang
+export CXX=clang++
+export CFLAGS="-O3 -flto"
+export CXXFLAGS="${CFLAGS}"
+export LDFLAGS="-Wl,-O1,--sort-common,--as-needed"
+
+rm -rf ./build-utils || true
+mkdir -p ./build-utils/utils
+cp ./init.c ./build-utils/init.c
+cd ./build-utils
+
+# Download patched bubblewrap (allows launching appimages inside conty)
+wget "https://bin.ajam.dev/x86_64_Linux/bwrap-patched" -O ./utils/bwrap
+
+# get the rest of utils
+wget "https://bin.ajam.dev/x86_64_Linux/bash" -O ./utils/bash
+wget "https://bin.ajam.dev/x86_64_Linux/Baseutils/busybox/busybox" -O ./utils/busybox
+wget "https://bin.ajam.dev/x86_64_Linux/Baseutils/unionfs-fuse/unionfs" -O ./utils/unionfs
+wget "https://bin.ajam.dev/x86_64_Linux/Baseutils/unionfs-fuse3/unionfs" -O ./utils/unionfs3
+wget "https://bin.ajam.dev/x86_64_Linux/dwarfs-tools" -O ./utils/dwarfs-tools
+ln -s dwarfs-tools ./utils/dwarfs
+ln -s dwarfs-tools ./utils/mkdwarfs
+ln -s dwarfs-tools ./utils/dwarfsextract
+chmod +x ./utils/*
+
+if [ ! -f utils/ld-linux-x86-64.so.2 ]; then
+	cp -L /lib64/ld-linux-x86-64.so.2 utils
+fi
+
+find utils -type f -exec strip --strip-unneeded {} \; 2>/dev/null
+
+init_program_size=50000
+conty_script_size="$(($(stat -c%s ../conty-start.sh)+2000))"
+bash_size="$(stat -c%s ./utils/bash)"
+
+sed -i "s/#define SCRIPT_SIZE 0/#define SCRIPT_SIZE ${conty_script_size}/g" init.c
+sed -i "s/#define BASH_SIZE 0/#define BASH_SIZE ${bash_size}/g" init.c
+sed -i "s/#define PROGRAM_SIZE 0/#define PROGRAM_SIZE ${init_program_size}/g" init.c
+
+musl-gcc -o init -static init.c
+strip --strip-unneeded init
+
+padding_size="$((init_program_size-$(stat -c%s init)))"
+if [ "${padding_size}" -gt 0 ]; then
+	dd if=/dev/zero of=padding bs=1 count="${padding_size}" >/dev/null 2>&1
+	cat init padding > init_new
+	rm -f init padding
+	mv init_new init
+fi
+
+mv ./init ./utils
+tar -zvcf utils_dwarfs.tar.gz utils
+mv utils_dwarfs.tar.gz "../"
+cd "../"
+rm -rf ./build-utils
+echo "All Done!"