crossgcc: Re-download the archive if it is incomplete

If the buildgcc is interrupt by Ctrl-C, probably part of
an archive is downloaded. If we run buildgcc again, the
incomplete archive would be considered as cached file
and skipped.

We check file hashes to see if the file is complete. If test
is failed, we need to delete the partially-downloaded file
and download it again.

sha1sum is quite different among the distributions.
Only Linux, Cygwin, Darwin have been tested.

Once new archive is deployed, a new checksum would be created,
which should be uploaded along with the script buildgcc.

Change-Id: Ibb1aa25a0374f774e1e643fe5e698de7bf7cc418
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/4511
Tested-by: build bot (Jenkins)
Reviewed-by: Idwer Vollering <vidwer@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

util/crossgcc/buildgcc

@@ -125,6 +125,26 @@ searchtool()
 			fi
 		fi
 	fi
+	if [ "`echo $1 | cut -b -3`" = "sha" ]; then
+		if [ $UNAME = "FreeBSD" ]; then
+			if test -x "`which sha1 2>/dev/null`"; then
+				echo sha1
+				return
+			fi
+		fi
+		if [ $UNAME = "NetBSD" ]; then
+			if test -x "`which cksum 2>/dev/null`"; then
+				echo cksum -a `echo $1 | sed -e 's,sum,,'`
+				return
+			fi
+		fi
+		if [ $UNAME = "Darwin" ]; then
+			if test -x "`which openssl 2>/dev/null`"; then
+				echo openssl `echo $1 | sed -e 's,sum,,'`
+				return
+			fi
+		fi
+	fi
 	printf "${RED}ERROR:${red} Missing tool: Please install $1 (eg using your OS packaging system)${NC}\n" >&2
 	[ -z "$3" ] && exit 1
 	false
@@ -151,6 +171,10 @@ wait_for_build() {
 	true
 }
 
+SHA1SUM=`searchtool sha1sum`
+SHA512SUM=`searchtool sha512sum`
+CHECKSUM=$SHA1SUM
+
 cleanup()
 {
 	printf "Cleaning up temporary files... "
@@ -295,10 +319,25 @@ for ARCHIVE in $GMP_ARCHIVE $MPFR_ARCHIVE $MPC_ARCHIVE $LIBELF_ARCHIVE  \
 	    $IASL_ARCHIVE $PYTHON_ARCHIVE $EXPAT_ARCHIVE; do
 	FILE=`basename $ARCHIVE`
 	printf " * $FILE "
-	test -f tarballs/$FILE && printf "(cached)" || (
+
+	##create the sum
+	#test -f sum/$FILE.cksum || (
+	#	$CHECKSUM tarballs/$FILE > sum/$FILE.cksum
+	#	continue
+	#)
+
+	test -f tarballs/$FILE && \
+			(test -z "$CHECKSUM" || \
+			test "`cat sum/$FILE.cksum 2>/dev/null | sed -e 's,.*\([0-9a-f]\{40\}\).*,\1,'`" = "`$CHECKSUM tarballs/$FILE 2>/dev/null | sed -e 's,.*\([0-9a-f]\{40\}\).*,\1,'`" ) && \
+			printf "(cached)" || (
 		printf "(downloading)"
+		rm -f tarballs/$FILE
 		cd tarballs
 		wget --no-check-certificate -q $ARCHIVE
+		cd ..
+		test ! -f sum/$FILE.cksum && test -f tarballs/$FILE && \
+			(test -z "$CHECKSUM" || $CHECKSUM tarballs/$FILE > sum/$FILE.cksum ) && \
+			printf "(checksum created. ${RED}Note. Please upload sum/$FILE.cksum if the corresponding archive is upgraded.${NC})"
 	)
 	test -f tarballs/$FILE || \
 		printf "\n${RED}Failed to download $FILE.${NC}\n"

util/crossgcc/sum/acpica-unix-20150204.tar.gz.cksum

@@ -0,0 +1 @@
+e8ab49a9cd47ec1f3542b4185852bb49814c7694  tarballs/acpica-unix-20150204.tar.gz

util/crossgcc/sum/binutils-2.25.tar.bz2.cksum

@@ -0,0 +1 @@
+b46cc90ebaba7ffcf6c6d996d60738881b14e50d  tarballs/binutils-2.25.tar.bz2

util/crossgcc/sum/gcc-4.9.2.tar.bz2.cksum

@@ -0,0 +1 @@
+79dbcb09f44232822460d80b033c962c0237c6d8  tarballs/gcc-4.9.2.tar.bz2

util/crossgcc/sum/gmp-6.0.0a.tar.bz2.cksum

@@ -0,0 +1 @@
+360802e3541a3da08ab4b55268c80f799939fddc  tarballs/gmp-6.0.0a.tar.bz2

util/crossgcc/sum/libelf-0.8.13.tar.gz.cksum

@@ -0,0 +1 @@
+c1d6ac5f182d19dd685c4dfd74eedbfe3992425d  tarballs/libelf-0.8.13.tar.gz

util/crossgcc/sum/mpc-1.0.3.tar.gz.cksum

@@ -0,0 +1 @@
+b8be66396c726fdc36ebb0f692ed8a8cca3bcc66  tarballs/mpc-1.0.3.tar.gz

util/crossgcc/sum/mpfr-3.1.2.tar.bz2.cksum

@@ -0,0 +1 @@
+46d5a11a59a4e31f74f73dd70c5d57a59de2d0b4  tarballs/mpfr-3.1.2.tar.bz2