add support for for/ref gerrit one-shot build with notificationHEADmaster

This presume that .ssh/config define 'gerrit' properly so
that ssh gerrit point to gerrit with the right user, key and port

usage: in a core repo, with a profile who's autogen.lastrun limit the build
to the core repo (no help/no dict/no binfilter and no i10n)
tinbuild2 -p gerrit -g refs/changes/x/y/z (as provided in the gerrit gui)
this will essentialy check out that change in a headless branch, build it
like for a 'prime build' and notify gerrit of the result via the
gerrit review command line

TODO: notify at the bebeggin too to announce the start of the test-build

This will eventually be able to be controled via a daemon that will
monitor which patcheset need building and submit such tinbuild2 commands
as needed

2 files changed, 30 insertions, 8 deletions

diff --git a/bin/tinbuild2 b/bin/tinbuild2
index 24f6bba..da69590 100755
--- a/bin/tinbuild2
+++ b/bin/tinbuild2
@@ -18,6 +18,8 @@ CHECK=0
 FORCE_REBUILD=0
 METADATA_DIR="."
 WATCHDOG=
+GERRIT_REF=
+DO_NOT_CLEAN=
 
 # load the internal functions. note that
 # tinderbuild_internals_<uname>.sh is sourced at the tail
@@ -96,6 +98,8 @@ Options:
    -a <email>   'author'. This is for branch that are not under tb supervision. that is the email of the
                 'author' of the branch. email are sent to that email address for sucess and failure
    -c           sanity check (verify that tou configuration is sane and send a test email)
+   -d <timeout_attemps> wrap make commands in a watchdog that will interrupt them if they get stuck for <timeout>
+   -g <ref>     gerrit ref to build, like refs/changes/02/102/1 see gerrit download checkout information
    -i           run with ionice -c3, can be combined with -n
    -k           to not override autogen.lastrun if present (usefull with -z to do a quick test)
    -m [all,tb,owner,author,none]
@@ -113,7 +117,6 @@ Options:
    -v           verbose. print more progress messages
    -w           specify minimum wait between build attempt
    -z           bootstrap/prime the tinbuild
-   -d "<timeout> <attempts>" wrap make commands in a watchdog that will interrupt them if they get stuck
 
 EOF
 }
@@ -225,14 +228,16 @@ sanity_check()
 # Main
 #
 
-while getopts a:b:cd:efhiknm:p:r:tvw:z opt ; do
+while getopts 0a:b:cd:efg:hiknm:p:r:tvw:z opt ; do
     case "$opt" in
+        0) DO_NOT_CLEAN=1 ;; # avoid calling *_clean functions (incremental build)
         a) BRANCH_AUTHOR="$OPTARG" ;; # email to the branch's author for out-of-tinderbox branch buildbot
         b) BRANCH="$OPTARG";; # to override the branch name to use
-        e) LOCK=0 ;;      # whether to use flock to protect the build-cycle
         c) CHECK=1 ;;     # whether to invoke the sanity-check function
         d) WATCHDOG="makewatchdog $OPTARG -- " ;; # wrap make in a watchdog
+        e) LOCK=0 ;;      # whether to use flock to protect the build-cycle
         f) FORCE_REBUILD=1;; # whether to force an initial rebuild on restart, even if the pull-info are unchanged
+        g) GERRIT_REF="$OPTARG" ; BRANCH="gerrit"; SEND_MAIL="none"; PRIME_BUILD=1 ;; # gerit's ref to fetch. This imply a one time build, no memory
         h) usage; exit ;; # display help
         i) NICE="$NICE ionice -c3" ;; # be gentle on i/o
         k) KEEP_AUTOGEN="YES" ;; # do not override the local autogen.lastrun if present
@@ -326,7 +331,11 @@ else
     esac
 fi
 
-collect_current_heads
+if [ -z "$GERRIT_REF" ] ; then
+    collect_current_heads
+else
+    git fetch ssh://gerrit/core $GERRIT_REF && git checkout FETCH_HEAD || die "Error setting up the ref";
+fi
 
 # do a build without involving the tinderbox to establish a good baseline
 if [ "${PRIME_BUILD?}" = "1" ] ; then
@@ -344,8 +353,9 @@ if [ "${PRIME_BUILD?}" = "1" ] ; then
 
         do_build
 
-        rotate_logs
-
+        if [ -z "$GERRIT_REF" ] ; then
+            rotate_logs
+        fi
         if [ "$retval" = "0" ] ; then
             exit 0
         else
@@ -354,6 +364,15 @@ if [ "${PRIME_BUILD?}" = "1" ] ; then
     ) 200>${lock_file?}
     retval=$?
 
+    if [ -n "$GERRIT_REF" ] ; then
+        if [ "${retval}" = "0" ] ; then
+            echo "ssh gerrit gerrit review --project core --force-message -m \"Successful build of $(git rev-parse HEAD) on tinderbox: $TINDER_NAME\" --verified +1 $(git rev-parse HEAD)"
+            ssh gerrit gerrit review --project core --force-message -m \"Successful build of $(git rev-parse HEAD) on tinderbox: $TINDER_NAME\" --verified +1 $(git rev-parse HEAD)
+        else
+            echo "ssh gerrit gerrit review --project core --force-message -m \"Failed build of $(git rev-parse HEAD) on tinderbox: $TINDER_NAME\" --verified -1 $(git rev-parse HEAD)"
+            ssh gerrit gerrit review --project core --force-message -m \"Failed build of $(git rev-parse HEAD) on tinderbox: $TINDER_NAME\" --verified -1 $(git rev-parse HEAD)
+        fi
+    fi
     exit ${retval?}
 else
     if [ ! -f "${METADATA_DIR?}/tb_${B}_last-success-git-heads.txt" ] ; then
diff --git a/bin/tinbuild_internals.sh b/bin/tinbuild_internals.sh
index 9f1ff63..97d3589 100644
--- a/bin/tinbuild_internals.sh
+++ b/bin/tinbuild_internals.sh
@@ -435,8 +435,11 @@ do_build()
     build_status="build_failed"
     retval=0
     retry_count=3
-    phase_list="autogen clean make test push"
-
+    if [ "$DO_NOT_CLEAN" = "1" ] ; then
+        phase_list="autogen make test push"
+    else
+        phase_list="autogen clean make test push"
+    fi
     while [ "$phase_list" != "" ] ; do
         for p in $phase_list ; do
             [ $V ] && echo "phase $p"