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diff --git a/include/download.mk b/include/download.mk
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+#
+# Copyright (C) 2006-2012 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+DOWNLOAD_RDEP=$(STAMP_PREPARED) $(HOST_STAMP_PREPARED)
+
+# Try to guess the download method from the URL
+define dl_method
+$(strip \
+ $(if $(2),$(2), \
+ $(if $(filter @GNOME/% @GNU/% @KERNEL/% @SF/% @SAVANNAH/% ftp://% http://% https://% file://%,$(1)),default, \
+ $(if $(filter git://%,$(1)),git, \
+ $(if $(filter svn://%,$(1)),svn, \
+ $(if $(filter cvs://%,$(1)),cvs, \
+ $(if $(filter hg://%,$(1)),hg, \
+ $(if $(filter sftp://%,$(1)),bzr, \
+ unknown \
+ ) \
+ ) \
+ ) \
+ ) \
+ ) \
+ ) \
+ ) \
+)
+endef
+
+# code for creating tarballs from cvs/svn/git/bzr/hg/darcs checkouts - useful for mirror support
+dl_pack/bz2=$(TAR) cjf $(1) $(2)
+dl_pack/gz=$(TAR) czf $(1) $(2)
+dl_pack/xz=$(TAR) c $(2) | xz -zc > $(1)
+dl_pack/unknown=echo "ERROR: Unknown pack format for file $(1)"; false
+define dl_pack
+ $(if $(dl_pack/$(call ext,$(1))),$(dl_pack/$(call ext,$(1))),$(dl_pack/unknown))
+endef
+
+define DownloadMethod/unknown
+ @echo "ERROR: No download method available"; false
+endef
+
+define DownloadMethod/default
+ $(SCRIPT_DIR)/download.pl "$(DL_DIR)" "$(FILE)" "$(MD5SUM)" $(foreach url,$(URL),"$(url)")
+endef
+
+define wrap_mirror
+ $(if $(if $(MIRROR),$(filter-out x,$(MIRROR_MD5SUM))),@$(SCRIPT_DIR)/download.pl "$(DL_DIR)" "$(FILE)" "$(MIRROR_MD5SUM)" || ( $(1) ),$(1))
+endef
+
+define DownloadMethod/cvs
+ $(call wrap_mirror, \
+ echo "Checking out files from the cvs repository..."; \
+ mkdir -p $(TMP_DIR)/dl && \
+ cd $(TMP_DIR)/dl && \
+ rm -rf $(SUBDIR) && \
+ [ \! -d $(SUBDIR) ] && \
+ cvs -d $(URL) export $(VERSION) $(SUBDIR) && \
+ echo "Packing checkout..." && \
+ $(call dl_pack,$(TMP_DIR)/dl/$(FILE),$(SUBDIR)) && \
+ mv $(TMP_DIR)/dl/$(FILE) $(DL_DIR)/ && \
+ rm -rf $(SUBDIR); \
+ )
+endef
+
+define DownloadMethod/svn
+ $(call wrap_mirror, \
+ echo "Checking out files from the svn repository..."; \
+ mkdir -p $(TMP_DIR)/dl && \
+ cd $(TMP_DIR)/dl && \
+ rm -rf $(SUBDIR) && \
+ [ \! -d $(SUBDIR) ] && \
+ ( svn help export | grep -q trust-server-cert && \
+ svn export --non-interactive --trust-server-cert -r$(VERSION) $(URL) $(SUBDIR) || \
+ svn export --non-interactive -r$(VERSION) $(URL) $(SUBDIR) ) && \
+ echo "Packing checkout..." && \
+ $(call dl_pack,$(TMP_DIR)/dl/$(FILE),$(SUBDIR)) && \
+ mv $(TMP_DIR)/dl/$(FILE) $(DL_DIR)/ && \
+ rm -rf $(SUBDIR); \
+ )
+endef
+
+define DownloadMethod/git
+ $(call wrap_mirror, \
+ echo "Checking out files from the git repository..."; \
+ mkdir -p $(TMP_DIR)/dl && \
+ cd $(TMP_DIR)/dl && \
+ rm -rf $(SUBDIR) && \
+ [ \! -d $(SUBDIR) ] && \
+ git clone $(URL) $(SUBDIR) --recursive && \
+ (cd $(SUBDIR) && git checkout $(VERSION) && git submodule update) && \
+ echo "Packing checkout..." && \
+ rm -rf $(SUBDIR)/.git && \
+ $(call dl_pack,$(TMP_DIR)/dl/$(FILE),$(SUBDIR)) && \
+ mv $(TMP_DIR)/dl/$(FILE) $(DL_DIR)/ && \
+ rm -rf $(SUBDIR); \
+ )
+endef
+
+define DownloadMethod/bzr
+ $(call wrap_mirror, \
+ echo "Checking out files from the bzr repository..."; \
+ mkdir -p $(TMP_DIR)/dl && \
+ cd $(TMP_DIR)/dl && \
+ rm -rf $(SUBDIR) && \
+ [ \! -d $(SUBDIR) ] && \
+ bzr export -r$(VERSION) $(SUBDIR) $(URL) && \
+ echo "Packing checkout..." && \
+ $(call dl_pack,$(TMP_DIR)/dl/$(FILE),$(SUBDIR)) && \
+ mv $(TMP_DIR)/dl/$(FILE) $(DL_DIR)/ && \
+ rm -rf $(SUBDIR); \
+ )
+endef
+
+define DownloadMethod/hg
+ $(call wrap_mirror, \
+ echo "Checking out files from the hg repository..."; \
+ mkdir -p $(TMP_DIR)/dl && \
+ cd $(TMP_DIR)/dl && \
+ rm -rf $(SUBDIR) && \
+ [ \! -d $(SUBDIR) ] && \
+ hg clone -r $(VERSION) $(URL) $(SUBDIR) && \
+ find $(SUBDIR) -name .hg | xargs rm -rf && \
+ echo "Packing checkout..." && \
+ $(call dl_pack,$(TMP_DIR)/dl/$(FILE),$(SUBDIR)) && \
+ mv $(TMP_DIR)/dl/$(FILE) $(DL_DIR)/ && \
+ rm -rf $(SUBDIR); \
+ )
+endef
+
+define DownloadMethod/darcs
+ $(call wrap_mirror, \
+ echo "Checking out files from the darcs repository..."; \
+ mkdir -p $(TMP_DIR)/dl && \
+ cd $(TMP_DIR)/dl && \
+ rm -rf $(SUBDIR) && \
+ [ \! -d $(SUBDIR) ] && \
+ darcs get -t $(VERSION) $(URL) $(SUBDIR) && \
+ find $(SUBDIR) -name _darcs | xargs rm -rf && \
+ echo "Packing checkout..." && \
+ $(call dl_pack,$(TMP_DIR)/dl/$(FILE),$(SUBDIR)) && \
+ mv $(TMP_DIR)/dl/$(FILE) $(DL_DIR)/ && \
+ rm -rf $(SUBDIR); \
+ )
+endef
+
+Validate/cvs=VERSION SUBDIR
+Validate/svn=VERSION SUBDIR
+Validate/git=VERSION SUBDIR
+Validate/bzr=VERSION SUBDIR
+Validate/hg=VERSION SUBDIR
+Validate/darcs=VERSION SUBDIR
+
+define Download/Defaults
+ URL:=
+ FILE:=
+ PROTO:=
+ MD5SUM:=
+ SUBDIR:=
+ MIRROR:=1
+ MIRROR_MD5SUM:=x
+ VERSION:=
+endef
+
+define Download
+ $(eval $(Download/Defaults))
+ $(eval $(Download/$(1)))
+ $(foreach FIELD,URL FILE $(Validate/$(call dl_method,$(URL),$(PROTO))),
+ ifeq ($($(FIELD)),)
+ $$(error Download/$(1) is missing the $(FIELD) field.)
+ endif
+ )
+
+ $(foreach dep,$(DOWNLOAD_RDEP),
+ $(dep): $(DL_DIR)/$(FILE)
+ )
+ download: $(DL_DIR)/$(FILE)
+
+ $(DL_DIR)/$(FILE):
+ mkdir -p $(DL_DIR)
+ $(if $(DownloadMethod/$(call dl_method,$(URL),$(PROTO))),$(DownloadMethod/$(call dl_method,$(URL),$(PROTO))),$(DownloadMethod/unknown))
+
+endef