ghost: support building multi-arch

Author: aitjcize

.gitignore

@@ -1,4 +1,4 @@
-bin/ghost
+bin/ghost.*.linux*
 bin/ghost.py.bin
 bin/overlordd
 bin/ovl.py.bin

Dockerfile

@@ -27,12 +27,8 @@ RUN mkdir -p /config /app /app/webroot/upgrade
 WORKDIR /app
 
 COPY --from=gobuilder /src/bin/overlordd /app
-COPY --from=gobuilder /src/bin/ghost /app
 COPY --from=gobuilder /src/scripts/start_overlordd.sh /app
-COPY --from=gobuilder /src/bin/ghost /app/webroot/upgrade/ghost.linux.amd64
-
-RUN sha1sum /app/webroot/upgrade/ghost.linux.amd64 | \
-	awk '{ print $1 }' > /app/webroot/upgrade/ghost.linux.amd64.sha1
+COPY --from=gobuilder /src/bin/ghost.* /app/webroot/upgrade/
 
 COPY --from=nodebuilder /src/webroot /app/webroot
 

Makefile

@@ -12,12 +12,21 @@ WEBROOT_DIR=$(CURDIR)/webroot
 APPS_DIR=$(WEBROOT_DIR)/apps
 GO_DIRS=./overlord/... ./cmd/...
 
+# Supported architectures for ghost binary
+GHOST_ARCHS=amd64 386 arm64 armv7
+GHOST_BINS=$(addprefix $(BIN)/ghost., $(addsuffix .linux,$(GHOST_ARCHS)))
+
 ifeq ($(STATIC), true)
 	LDFLAGS=-a -tags netgo -installsuffix netgo \
 		-ldflags '-extldflags "-static"'
 endif
 
-.PHONY: all build build-bin build-apps clean clean-apps install go-fmt go-lint
+.PHONY: all \
+	build build-bin build-apps \
+	ghost overlordd \
+	go-fmt go-lint \
+	clean clean-apps \
+	install
 
 all: build
 
@@ -36,7 +45,28 @@ overlordd: deps
 	ln -s $(WEBROOT_DIR) $(BIN)/webroot
 
 ghost: deps
-	GOBIN=$(BIN) $(GO) install $(LDFLAGS) $(CURDIR)/cmd/$@
+	@echo "Building ghost for architectures: $(GHOST_ARCHS)"
+	@for arch in $(GHOST_ARCHS); do \
+		echo "Building for $$arch ..."; \
+		GOARCH_VAL=$$arch; \
+		if [ "$$arch" = "armv7" ]; then \
+			GOARCH_VAL="arm"; \
+			GOARM=7 GOOS=linux GOARCH=$$GOARCH_VAL \
+			$(GO) build $(LDFLAGS) \
+				-o $(BIN)/ghost.$$arch.linux \
+				$(CURDIR)/cmd/ghost; \
+		else \
+			GOOS=linux GOARCH=$$GOARCH_VAL \
+			$(GO) build $(LDFLAGS) \
+				-o $(BIN)/ghost.$$arch.linux \
+				$(CURDIR)/cmd/ghost; \
+		fi; \
+	done
+	@echo "Generating SHA1 checksums ..."
+	@cd $(BIN) && for arch in $(GHOST_ARCHS); do \
+		sha1sum ghost.$$arch.linux > ghost.$$arch.linux.sha1; \
+	done
+	@echo "Build complete!"
 
 build-go: overlordd ghost
 
@@ -106,6 +136,6 @@ clean-apps:
 	rm -rf $(WEBROOT_DIR)/index.html
 
 clean: clean-apps
-	rm -rf $(BIN)/ghost $(BIN)/overlordd $(BUILD) \
+	rm -rf $(BIN)/ghost* $(BIN)/overlordd $(BUILD) \
 		$(BIN)/ghost.py.bin $(BIN)/ovl.py.bin \
 		$(APPS_DIR)

overlord/sysutils_posix.go

@@ -73,3 +73,17 @@ func GetenvInt(key string, defaultValue int) int {
 	}
 	return value
 }
+
+// Ttyname returns the TTY name of a given file descriptor.
+func Ttyname(fd uintptr) (string, error) {
+	// Get the process ID
+	pid := os.Getpid()
+
+	// Try to read the symlink for the file descriptor
+	ttyPath, err := os.Readlink(fmt.Sprintf("/proc/%d/fd/%d", pid, fd))
+	if err != nil {
+		return "", fmt.Errorf("failed to get tty name: %v", err)
+	}
+
+	return ttyPath, nil
+}