[PATCH RFC 8/9] mg-unixbench-download: make it generic

[Dario Faggioli <dario.faggioli@citrix.com>]

so that it can handle the retrieval of different
benchmarks. The name of the benchmark to fetch should
be among the supported one, and is passed as an argument.

XXX This is a stab. As detailed in the cover letter, I
    just wanted to give an idea of how things would look
    like, if we take this path. I personally prefer it
    like this, but let's talk about it.

    Of course, if we decide to go this way, the name
    will be changed from mg-unixbench-download to
    mg-bench-download, and I'll structure the file
    like this from the beginning.

Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
---
 ap-common             |    4 ++++
 mg-unixbench-download |   19 +++++++++++++++++--
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/ap-common b/ap-common
index 000ca69..ff0f205 100644
--- a/ap-common
+++ b/ap-common
@@ -140,3 +140,7 @@ info_linux_tree () {
 # UnixBench. By default we try to grab version 5.1.3
 : ${REMOTEFILE_UNIXBENCH:=http://byte-unixbench.googlecode.com/files/unixbench-5.1.3.tgz}
 : ${LOCALFILE_UNIXBENCH:=unixbench.tgz}
+
+# hackbench. By default, directly from mingo page!
+: ${REMOTEFILE_HACKBENCH:=http://people.redhat.com/mingo/cfs-scheduler/tools/hackbench.c}
+: ${LOCALFILE_HACKBENCH:=hackbench.c}
diff --git a/mg-unixbench-download b/mg-unixbench-download
index 891b0b1..c4d5ab3 100755
--- a/mg-unixbench-download
+++ b/mg-unixbench-download
@@ -30,5 +30,20 @@ images=`getconfig Images`;
 dstdir="${images}/benchs"
 mkdir -p $dstdir
 
-wget ${REMOTEFILE_UNIXBENCH} -O ${dstdir}/${LOCALFILE_UNIXBENCH} || \
-    fail "failed downloading the benchmark"
+for bench in "$@"; do
+  case $bench in
+    unixbench)
+      bench_url=${REMOTEFILE_UNIXBENCH}
+      bench_dst=${dstdir}/${LOCALFILE_UNIXBENCH}
+      ;;
+    hackbench)
+      bench_url=${REMOTEFILE_HACKBENCH}
+      bench_dst=${dstdir}/${LOCALFILE_HACKBENCH}
+      ;;
+    *)
+      fail "unknown benchmark $bench"
+      ;;
+    esac
+
+    wget ${bench_url} -O ${bench_dst} || fail "failed downloading ${bench}"
+done