+#
+# Copyright (C) 2006-2007 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+# unpacking files with +s may break on some platforms. this typically emits error code 2
+ifneq ($(HOST_OS),Linux)
+ HOST_TAR:=trapret 2 $(TAR)
+else
+ HOST_TAR:=$(TAR)
+endif
+TAR_CMD=$(HOST_TAR) -C $(1)/.. $(TAR_OPTIONS)
+UNZIP_CMD=unzip -d $(1)/.. $(DL_DIR)/$(PKG_SOURCE)
+
+ifeq ($(PKG_SOURCE),)
+ PKG_UNPACK ?= true
+else
+
+ifeq ($(strip $(UNPACK_CMD)),)
+ ifeq ($(strip $(PKG_CAT)),)
+ # try to autodetect file type
+ EXT:=$(call ext,$(PKG_SOURCE))
+ EXT1:=$(EXT)
+
+ ifeq ($(filter gz tgz,$(EXT)),$(EXT))
+ EXT:=$(call ext,$(PKG_SOURCE:.$(EXT)=))
+ DECOMPRESS_CMD:=gzip -dc $(DL_DIR)/$(PKG_SOURCE) |
+ endif
+ ifeq ($(filter bzip2 bz2 bz tbz2 tbz,$(EXT)),$(EXT))
+ EXT:=$(call ext,$(PKG_SOURCE:.$(EXT)=))
+ DECOMPRESS_CMD:=bzcat $(DL_DIR)/$(PKG_SOURCE) |
+ endif
+ ifeq ($(filter xz txz,$(EXT)),$(EXT))
+ EXT:=$(call ext,$(PKG_SOURCE:.$(EXT)=))
+ DECOMPRESS_CMD:=xzcat $(DL_DIR)/$(PKG_SOURCE) |
+ endif
+ ifeq ($(filter tgz tbz tbz2 txz,$(EXT1)),$(EXT1))
+ EXT:=tar
+ endif
+ DECOMPRESS_CMD ?= cat $(DL_DIR)/$(PKG_SOURCE) |
+ ifeq ($(EXT),tar)
+ UNPACK_CMD=$(DECOMPRESS_CMD) $(TAR_CMD)
+ endif
+ ifeq ($(EXT),cpio)
+ UNPACK_CMD=$(DECOMPRESS_CMD) (cd $(1)/..; cpio -i -d)
+ endif
+ ifeq ($(EXT),zip)
+ UNPACK_CMD=$(UNZIP_CMD)
+ endif