try skip build in CI

.github/workflows/build.yml

@@ -58,13 +58,13 @@ jobs:
             IMAGE_EXT=${{ matrix.extension }}
           cache-from: type=gha,scope=${{ matrix.epics-target }}
           cache-to: type=gha,mode=max,scope=${{ matrix.epics-target }}
-          tags: ci_test
+          tags: ci_test:latest
           load: true
 
       - name: Test image
         # can't test non native without some hardware to run on
         if: ${{ matrix.epics-target == 'linux-x86_64' }}
-        run: tests/run-tests.sh
+        run: SKIP_BUILD=1 tests/run-tests.sh ci_test:latest
 
       - name: Push developer image
         if: ${{ github.event_name == 'push' && github.ref_type == 'tag' }}

build

@@ -32,8 +32,7 @@ fi
 # make sure new repos get their submodule ibek-support
 if [ ! -d ibek-support/_global ] ; then git submodule update --init ; fi
 
-# build and developer images
+# build runtime or developer image
 set -x
-$docker build -t ${TAG} "${@}" \
-    --build-arg IMAGE_EXT=$IMAGE_EXT \
-    $runtime --target $TARGET .
+$docker build -t ${TAG} "${@}" --build-arg IMAGE_EXT=$IMAGE_EXT \
+    --target $TARGET .

tests/run-tests.sh

@@ -22,8 +22,8 @@ fi
 cd ${ROOT}
 
 # if a tag was passed in this implies it was already built
-export TAG=${TAG:-localhost/ec_test}
-if [[ ${TAG} == "localhost/ec_test" ]] ; then TARGET=runtime ./build; fi
+export TAG=${TAG:-ec_test}
+if [[ ${TAG} == "ec_test" ]] ; then TARGET=runtime ./build; fi
 
 # try out a test ibek config IOC instance with the generic IOC
 opts="--rm --security-opt=label=disable -v ${THIS}/config:${CONF}"