minimal AppImage-like portable packaging system
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tarinstall/posix/payload

74 lines
1.8 KiB

#!/bin/sh -ex
# TODO: extract self without resolving to $0 because it doesn't resolve links
if [ -z "$XDG_CACHE_HOME" ]; then
destdir=/tmp/tarinstall
else
destdir="$XDG_CACHE_HOME"/tarinstall
fi
if ! [ -d "$destdir" ]; then
mkdir -p "$destdir"
fi
# If the file does not contain the .tin extension it was either renamed or
# linked somewhere, so if it was called as $ <exe> then try to find it in the
# current directory else try to find it in path. When found evaluate if it is
# a link, if it is traverse it and then set the archive variable
# TODO: for each match check if the file si really a tarinstall with a header
archive="$0"
if ! echo "$archive" | grep -q \.tin$; then
if [ "$(dirname "$archive")" = '.' ]; then
if [ -e "$archive" ]; then
if [ -L "$archive" ]; then
archive="$(readlink "$0")"
fi
else
: > "$destdir"/paths
( IFS=:
for p in $PATH; do
find -L "$p" -name "$archive" >> "$destdir"/paths
done
)
while read -r l; do
if [ -L "$l" ]; then
archive="$(readlink "$l")"
break
elif [ -x "$l" ]; then
archive="$l"
break
fi
done < "$destdir"/paths
fi
fi
fi
if ! [ "$(head -n 1 "$destdir"/ID/checksum 2>/dev/null)" = 'SUM' ]; then
rm -rf "$destdir"/ID
tail -c +BYTES "$0" | lz4 -dc | tar -x -C "$destdir"
echo "SUM" > "$destdir"/ID/checksum
fi
if [ "$(find "$destdir"/ID/bin -maxdepth 1 -type f | wc -l)" = '1' ]; then
binname="$(find "$destdir"/ID/bin -maxdepth 1 -type f)"
else
binname="$(basename "$0")"
if echo "$binname" | grep -q \.tin$; then
binname="$destdir"/ID/bin/"$(echo "$binname" | sed s/\.tin//)"
fi
fi
ORIGIN="$destdir"/ID
LD_LIBRARY_PATH="$ORIGIN/lib"
PATH="$ORIGIN/bin":$PATH
export ORIGIN
export LD_LIBRARY_PATH
export PATH
# export LD_DEBUG='libs'
exec "$binname" "$@"