[xen staging] automation: allow doing hypervisor only builds

[patchbot@xxxxxxx]

commit 893103e286ac1c500d2ad113f55c41edb35e047c
Author:     Roger Pau Monne <roger.pau@xxxxxxxxxx>
AuthorDate: Wed Mar 3 15:33:16 2021 +0100
Commit:     Wei Liu <wl@xxxxxxx>
CommitDate: Thu Mar 11 15:39:37 2021 +0000

    automation: allow doing hypervisor only builds
    
    For things like randconfig there's no need to do a full Xen build, a
    hypervisor build only will be much faster and will achieve the same
    level of testing, as randconfig only changes the hypervisor build
    options.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Release-Acked-by: Ian Jackson <iwj@xxxxxxxxxxxxxx>
    Acked-by: Doug Goldstein <cardoe@xxxxxxxxxx>
---
 automation/scripts/build | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/automation/scripts/build b/automation/scripts/build
index 87e44bb940..1b752edfe6 100755
--- a/automation/scripts/build
+++ b/automation/scripts/build
@@ -11,6 +11,7 @@ cc-ver()
 # random config or default config
 if [[ "${RANDCONFIG}" == "y" ]]; then
     make -j$(nproc) -C xen KCONFIG_ALLCONFIG=tools/kconfig/allrandom.config 
randconfig
+    hypervisor_only="y"
 else
     make -j$(nproc) -C xen defconfig
 fi
@@ -45,16 +46,27 @@ if [[ "${CC}" == "gcc" && `cc-ver` -lt 0x040600 ]]; then
     cfgargs+=("--with-system-seabios=/bin/false")
 fi
 
-./configure "${cfgargs[@]}"
-
-make -j$(nproc) dist
+if [[ "${hypervisor_only}" == "y" ]]; then
+    make -j$(nproc) xen
+else
+    ./configure "${cfgargs[@]}"
+    make -j$(nproc) dist
+fi
 
 # Extract artifacts to avoid getting rewritten by customised builds
 cp xen/.config xen-config
 mkdir binaries
 if [[ "${XEN_TARGET_ARCH}" != "x86_32" ]]; then
     cp xen/xen binaries/xen
-    cp -r dist binaries/
+    if [[ "${hypervisor_only}" != "y" ]]; then
+        cp -r dist binaries/
+    fi
+fi
+
+if [[ "${hypervisor_only}" == "y" ]]; then
+    # If we are build testing a specific Kconfig exit now, there's no point in
+    # testing all the possible configs.
+    exit 0
 fi
 
 # Build all the configs we care about
--
generated by git-patchbot for /home/xen/git/xen.git#staging