tcwg-benchmark.sh: Add rsync:// url type for toolchain.

When toolchain_url is provided as ssh://*, multiple direct connexions
to the remote machine may fail because the limit on the number of
simulaneous ssh connexions is too low.  To avoid this problem, we add
a new rsync:// url type, using the local build container (which has a
suitable sshd configuration), assuming it uses the same architecture
as the machine pointed to by $toolchain_url.

It's easier to copy the remote toolchain into it, since users' home
dirs are not bind-mounted in containers, so creating a remote build
container is not practical as it likely wouldn't have access to the
toolchain anyway, meaning another copy would be needed.

Change-Id: I541a4281123ed7b4654dfb705678dfea5d9dfa59

1 files changed, 22 insertions, 4 deletions

diff --git a/tcwg-benchmark.sh b/tcwg-benchmark.sh
index a24466ff..059f9cf1 100755
--- a/tcwg-benchmark.sh
+++ b/tcwg-benchmark.sh
@@ -55,6 +55,28 @@ case "$toolchain_url" in
 	tarball="$(ls $(basename "$toolchain_url"))"
 	tar xf "${tarball}"
 	toolchaindir="$WORKSPACE/$(echo "${tarball}" | sed 's/.tar.xz//')"
+	;;
+    "rsync://"*)
+	ccprefix="${toolchain_url##rsync://}"
+	# We want to access the remote toolchain via a container, to
+	# avoid problems with the hosts's ssh server restrictions on the
+	# number of simulaneous connexions.
+	# We copy it to the build container (assuming it uses the same
+	# architecture as the machine pointed to by $toolchain_url).
+	# Assume ccprefix looks like /path/bin/target-triplet-, and
+	# compute 'path'.
+	src_toolchaindir=$(dirname $(dirname ${ccprefix}))
+	toolchaindir="${WORKSPACE}/toolchain-${BUILD_NUMBER}"
+	rsync -az --delete "$src_toolchaindir/" "$toolchaindir/"
+	;;
+    *)
+	echo "ERROR: Cannot handle toolchain_url: $toolchain_url"
+	exit 1
+	;;
+esac
+
+case "$toolchain_url" in
+    "http://"*|"https://"*|"rsync://"*)
 	ccpath=$(find "$toolchaindir" -name "*-gcc")
 	ccprefix=$(echo "$ccpath" | sed -e 's/-gcc$/-/')
 	# Copy toolchain to the build container.
@@ -64,10 +86,6 @@ case "$toolchain_url" in
 	    sysroot="$build_container_host:$(find "$toolchaindir" -name "libc")"
 	fi
 	;;
-    *)
-	echo "ERROR: Cannot handle toolchain_url: $toolchain_url"
-	exit 1
-	;;
 esac
 
 # Slaves for this job are virtual slaves on dev-01,