add make and docker support

GNUmakefile

@@ -62,6 +62,11 @@ chainlink-local-start:
 install-medianpoc: ## Build & install the chainlink-medianpoc binary.
 	go install $(GOFLAGS) ./plugins/cmd/chainlink-medianpoc
 
+.PHONY: install-mercury-loop
+install-mercury-loop: ## Build & install the chainlink-medianpoc binary.
+	go install $(GOFLAGS) ./plugins/cmd/chainlink-mercury
+
+
 .PHONY: docker ## Build the chainlink docker image
 docker:
 	docker buildx build \

core/services/ocr2/plugins/mercury/plugin.go

@@ -96,7 +96,7 @@ func NewServices(
 	saver := ocrcommon.NewResultRunSaver(pipelineRunner, lggr, cfg.MaxSuccessfulRuns(), cfg.ResultWriteQueueDepth())
 	srvs = append(srvs, saver)
 
-	loopEnabled, loopCmd := env.MercuryPlugin.Cmd.Get() != "", env.MercuryPlugin.Env.Get()
+	loopEnabled, loopCmd := env.MercuryPlugin.Cmd.Get() != "", env.MercuryPlugin.Cmd.Get()
 
 	// this is the factory that will be used to create the mercury plugin
 	var factory ocr3types.MercuryPluginFactory
@@ -203,6 +203,7 @@ func NewServices(
 }
 
 func initLoop(cmd string, cfg Config, feedID utils.FeedID, lggr logger.Logger) (func() *exec.Cmd, loop.GRPCOpts, logger.Logger, error) {
+	lggr.Debug("Initializing loop for Mercury with command", cmd)
 	mercuryLggr := lggr.Named(fmt.Sprintf("MercuryV%d", feedID.Version())).Named(feedID.String())
 	envVars, err := plugins.ParseEnvFile(env.MercuryPlugin.Env.Get())
 	if err != nil {

plugins/chainlink.Dockerfile

@@ -20,6 +20,9 @@ RUN make install-chainlink
 # Install medianpoc binary
 RUN make install-medianpoc
 
+# Install the mercury binary
+RUN make install-mercury-loop
+
 # Link LOOP Plugin source dirs with simple names
 RUN go list -m -f "{{.Dir}}" github.com/smartcontractkit/chainlink-feeds | xargs -I % ln -s % /chainlink-feeds
 RUN go list -m -f "{{.Dir}}" github.com/smartcontractkit/chainlink-solana | xargs -I % ln -s % /chainlink-solana

plugins/cmd/chainlink-mercury/README.md

@@ -0,0 +1,19 @@
+This directory house the Mercury LOOPP
+
+# Running Integration Tests Locally
+
+Running the tests is as simple as
+- building this binary
+- setting the CL_MERCURY_CMD env var to the *fully resolved* binary path
+- running the test(s)
+
+
+The interesting tests are `TestIntegration_MercuryV*` in ` github.com/smartcontractkit/chainlink/v2/core/services/ocr2/plugins/mercury`
+
+In detail:
+```
+sh
+
+make install-mercury-loop # builds `mercury` binary in this dir
+CL_MERCURY_CMD=<YOUR_REPO_ROOT_DIR>/plugins/cmd/mercury/mercury go test -v -timeout 120s -run ^TestIntegration_MercuryV github.com/smartcontractkit/chainlink/v2/core/services/ocr2/plugins/mercury 2>&1 | tee /tmp/mercury_loop.log
+```