parse current docker context from ls output (#994)

Signed-off-by: Sunny Yip <sunny@kusari.dev>

Makefile

@@ -97,17 +97,18 @@ build_bins:
 # Build bins and copy to ./bin to align with docs
 # Separate build_bins as its own target to ensure (workaround) goreleaser finish writing dist/artifacts.json
 .PHONY: build
-build: build_bins
+build: check-goreleaser-tool-check build_bins
 	@mkdir -p bin
 	@echo "$(shell cat dist/artifacts.json | jq '.[]| { path: .path, name: .extra.ID } | join(" ")' -r)" | xargs -n 2 sh -c 'cp $$0 ./bin/$$1'
 	@echo "\nThe guac bins are available in ./bin"
 
 .PHONY: build_local_container
 build_local_container: GORELEASER_CURRENT_TAG ?= v0.0.0-$(LOCAL_IMAGE_NAME)
 build_local_container:
+    # docker CLI options are inconsistent across platforms; had to use the pretty print output here to extract the current context
 	GITHUB_REPOSITORY=$(GITHUB_REPOSITORY) \
 	GORELEASER_CURRENT_TAG=$(GORELEASER_CURRENT_TAG) \
-	DOCKER_CONTEXT=$(shell docker context show) \
+	DOCKER_CONTEXT=$(shell docker context ls | grep '*' | awk '{print $$1}') \
 	goreleaser release --clean --snapshot --skip-sign --skip-sbom
 
 # Build and package a guac container for local testing