Don't embed build info (#180)

This information isn't useful and makes it hard to reproducibly build the same output. If it was still useful then we could add it to the manifest, but it isn't, and so it is being removed. The build epcoh that is merged into CI builds will also need consideration, but is a separate PR.

Makefile

@@ -12,12 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-BUILD_USER ?= $(shell whoami)
-BUILD_HOST ?= $(shell hostname)
-BUILD_DATE ?= $(shell /bin/date -u "+%Y-%m-%d %H:%M:%S")
 BUILD_EPOCH := $(shell /bin/date -u "+%s")
 BUILD_TAGS = linkramsize,linkramstart,disable_fr_auth,linkprintk,nostatfs
-BUILD = ${BUILD_USER}@${BUILD_HOST} on ${BUILD_DATE}
 REV = $(shell git rev-parse --short HEAD 2> /dev/null)
 GIT_SEMVER_TAG ?= $(shell (git describe --tags --exact-match --match 'v*.*.*' 2>/dev/null || git describe --match 'v*.*.*' --tags 2>/dev/null || git describe --tags 2>/dev/null || echo -n v0.0.${BUILD_EPOCH}+`git rev-parse HEAD`) | tail -c +2 )
 FT_BIN_URL ?= "http://$(shell hostname --fqdn):9944/artefacts/"
@@ -44,7 +40,7 @@ ARCH = "arm"
 
 GOFLAGS = -tags ${BUILD_TAGS} -trimpath \
         -ldflags "-T ${TEXT_START} -E ${ENTRY_POINT} -R 0x1000 \
-                  -X 'main.Build=${BUILD}' -X 'main.Revision=${REV}' -X 'main.Version=${GIT_SEMVER_TAG}' \
+                  -X 'main.Revision=${REV}' -X 'main.Version=${GIT_SEMVER_TAG}' \
                   -X 'main.RestDistributorBaseURL=${REST_DISTRIBUTOR_BASE_URL}' \
                   -X 'main.updateBinariesURL=${FT_BIN_URL}' \
                   -X 'main.updateLogURL=${FT_LOG_URL}' \

trusted_applet/main.go

@@ -66,7 +66,6 @@ const (
 )
 
 var (
-	Build    string
 	Revision string
 	Version  string
 
@@ -96,9 +95,9 @@ func main() {
 	}
 	monitoring.SetMetricFactory(mf)
 
-	log.Printf("%s/%s (%s) • TEE user applet • %s %s",
+	log.Printf("%s/%s (%s) • TEE user applet • %s",
 		runtime.GOOS, runtime.GOARCH, runtime.Version(),
-		Revision, Build)
+		Revision)
 
 	// Verify if we are allowed to run on this unit by sending version
 	// information for rollback protection check.