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unpackCmdHooks+=(_tryUnpackGogMakeSelf _tryUnpackGogInnoSetup)
_tryUnpackGogMakeSelf() {
# Make sure it's really a Makeself installer with GOG.com modifications.
sed -n -e '1,/^\([^#]\| *\)$/ {
/This script.*Makeself/ {
n; /GOG\.com/q
}
200q1 # This is getting too long, so quit immediately.
b
}
q1' "$curSrc" || return 1
# The file consists of a shell script at the top, followed by a tarball with
# the installer and after that tarball, the actual ZIP file with the game
# data follows. So we need to calculate the offsets accordingly, which
# luckily are dumped using --dumpconf (we only get the sizes, but we can
# infer the starting offset for the ZIP file using those).
local zipfileOffset="$(
eval "$($SHELL "$curSrc" --dumpconf)"
declare -i offset=1
offset+="$(head -n $(($OLDSKIP - 1)) "$curSrc" | wc -c)"
for fs in $filesizes; do
offset+="$fs"
done
echo "$offset"
)"
# Unfortunately bsdtar exits with failure if one of the patterns specified
# using the --include flag doesn't match. However, if the desktop icon is
# missing it's not the end of the world, so we need to find another way to
# make it happen without bsdtar returning a failure.
#
# Let's introduce -s, which is used to substitute the paths. While it may
# sound eligible to be used in conjunction --include, it's only really useful
# for our case if the inclusion patterns would be matched _after_ the
# substitiotions. Unfortunately, they're matched before the substitions.
#
# So what we do instead is rewrite *everything* that we want to include into
# a special path "/_/game" and rewrite everything that doesn't begin with /
# into "skip". We're (ab)using the fact here that files coming from the
# archive never start with "/", but during the substitutions the leading
# slash isn't stripped.
#
# In the end the resulting paths are normalized, so "/..." will be turned
# into "./...", so all we need to do in the end is to strip 2 components from
# the resulting path. This discards every path that has been renamed to
# "skip".
tail -c"+$zipfileOffset" "$curSrc" | LANG=C.UTF-8 bsdtar -xf - \
-s '!^data/noarch/game/\(.*\)$!/_/game/\1!' \
-s '!^data/noarch/support/icon\.png$!/_/game/xdg-icon.png!' \
-s '!^[^/].*!skip!' --strip-components=2
}
_tryUnpackGogInnoSetup() {
innoextract -i "$curSrc" &> /dev/null || return 1
local -a unpackArgs=()
if [ -n "$innoExtractOnly" ]; then
local i
for i in $innoExtractOnly; do
unpackArgs+=("--include" "$i")
done
fi
if [ -z "$innoExtractKeepCase" ]; then
unpackArgs+=("-L")
fi
innoextract -s "${unpackArgs[@]}" -m "$curSrc"
}
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