feat: add build flags to opm to show version information

Author: exdx

Makefile

@@ -1,15 +1,24 @@
 GO := GOFLAGS="-mod=vendor" go
-CMDS := $(addprefix bin/, $(shell ls ./cmd))
+CMDS := $(addprefix bin/, $(shell ls ./cmd | grep -v opm))
+OPM := $(addprefix bin/, opm)
 SPECIFIC_UNIT_TEST := $(if $(TEST),-run $(TEST),)
+PKG := github.com/operator-framework/operator-registry
+GIT_COMMIT := $(shell git rev-parse --short HEAD)
+OPM_VERSION := $(shell cat OPM_VERSION)
+BUILD_DATE := $(shell date -u +'%Y-%m-%dT%H:%M:%SZ')
+
 
 .PHONY: all
 all: clean test build
 
 $(CMDS):
 	$(GO) build $(extra_flags) -o $@ ./cmd/$(notdir $@)
+$(OPM): opm_version_flags=-ldflags "-X '$(PKG)/cmd/opm/version.gitCommit=$(GIT_COMMIT)' -X '$(PKG)/cmd/opm/version.opmVersion=$(OPM_VERSION)' -X '$(PKG)/cmd/opm/version.buildDate=$(BUILD_DATE)'"
+$(OPM):
+	$(GO) build $(opm_version_flags) $(extra_flags) -o $@ ./cmd/$(notdir $@)
 
 .PHONY: build
-build: clean $(CMDS)
+build: clean $(CMDS) $(OPM)
 
 .PHONY: static
 static: extra_flags=-ldflags '-w -extldflags "-static"'

OPM_VERSION

@@ -0,0 +1 @@
+1.12.3