hooks/file-mirror-automount/setup00.sh: also parse MMDEBSTRAP_INCLUDE and make it available

hooks/file-mirror-automount/setup00.sh

@@ -8,6 +8,7 @@ fi
 
 rootdir="$1"
 
+# process all configured apt repositories
 env APT_CONFIG=$MMDEBSTRAP_APT_CONFIG apt-get indextargets --no-release-info --format '$(REPO_URI)' \
 	| sed -ne 's/^file:\/\+//p' \
 	| sort -u \
@@ -27,3 +28,38 @@ env APT_CONFIG=$MMDEBSTRAP_APT_CONFIG apt-get indextargets --no-release-info --f
 		esac
 		printf '/%s\0' "$path" >> "$rootdir/run/mmdebstrap/file-mirror-automount"
 	done
+
+# process all files given via --include
+set -f # turn off pathname expansion
+IFS=',' # split by comma
+for pkg in $MMDEBSTRAP_INCLUDE; do
+	set +f; unset IFS
+	case $pkg in
+		./*|../*|/*) : ;; # we are interested in this case
+		*) continue ;; # not a file
+	esac
+	# undo escaping
+	pkg="$(printf '%s' "$pkg" | sed 's/%2C/,/g; s/%25/%/g')"
+	# check for existance
+	if [ ! -f "$pkg" ]; then
+		echo "$pkg does not exist" >&2
+		continue
+	fi
+	# make path absolute
+	pkg="$(realpath "$pkg")"
+	mkdir -p "$rootdir/run/mmdebstrap"
+	mkdir -p "$rootdir/$(dirname "$pkg")"
+	case $MMDEBSTRAP_MODE in
+		root|unshare)
+			echo "bind-mounting $pkg into the chroot" >&2
+			touch "$rootdir/$pkg"
+			mount -o bind "$pkg" "$rootdir/$pkg"
+			;;
+		*)
+			echo "copying $pkg into the chroot" >&2
+			cp -av "$pkg" "$rootdir/$pkg"
+			;;
+	esac
+	printf '/%s\0' "$pkg" >> "$rootdir/run/mmdebstrap/file-mirror-automount"
+done
+set +f; unset IFS