seafile: fetch sources using commit hashes instead of release tags

Avoids source filename conflicts and the need to delete source packages
at the end of the prepare stage. This has forced the buildenv to rebuild
the packages even if they were built already.

Signed-off-by: Gergely Kiss <mail.gery@gmail.com>

net/seafile-seahub/Makefile

@@ -9,14 +9,14 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=seafile-seahub
 PKG_VERSION:=3.1.7
-PKG_RELEASE:=1
+PKG_RELEASE=$(PKG_SOURCE_VERSION)
 PKG_LICENSE:=Apache-2.0
 
-PKG_BUILD_DIR:=$(BUILD_DIR)/seahub-$(PKG_VERSION)-server
-PKG_SOURCE:=v$(PKG_VERSION)-server.tar.gz
-PKG_SOURCE_URL:=https://github.com/haiwen/seahub/archive/
-PKG_MD5SUM:=d019b7171ed23817025cba55554b90d9
-PKG_CAT:=zcat
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL:=https://github.com/haiwen/seahub.git
+PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
+PKG_SOURCE_VERSION:=a984c86442e7fc10c3bcf6d92b4843f7263547eb
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.gz
 
 include $(INCLUDE_DIR)/package.mk
 
@@ -37,12 +37,6 @@ define Package/seafile-seahub/description
 endef
 
 PKG_BUILD_DEPENDS:=python-setuptools
-Hooks/Prepare/Post += delete_source_package
-
-define delete_source_package
-	# deleting downloaded source package as its filename is ambiguous
-	rm -f $(DL_DIR)/$(PKG_SOURCE)
-endef
 
 define Build/Configure
 endef