added version support and openbsd compile

Author: lanrat

Makefile

@@ -1,21 +1,27 @@
 GIT_DATE := $(shell git log -1 --date=short --pretty='%cd' | tr -d -)
+GIT_HASH := $(shell git rev-parse HEAD)
+
+BUILD_FLAGS := -ldflags "-X main.git_date=$(GIT_DATE) -X main.git_hash=$(GIT_HASH)"
 
 all: certgraph
 
 fmt:
 	gofmt -s -w -l .
 
 certgraph: certgraph.go
-	go build -o $@ $^
+	go build $(BUILD_FLAGS) -o $@ $^
 
 certgraph.linux: certgraph.go
-	GOOS=linux go build -o $@ $^
+	GOOS=linux go build $(BUILD_FLAGS) -o $@ $^
 
 certgraph.mac: certgraph.go
-	GOOS=darwin go build -o $@ $^
+	GOOS=darwin go build $(BUILD_FLAGS) -o $@ $^
 
 certgraph.exe: certgraph.go
-	GOOS=windows GOARCH=386 go build -o certgraph.exe $^
+	GOOS=windows GOARCH=386 go build $(BUILD_FLAGS) -o certgraph.exe $^
+
+certgraph.openbsd: certgraph.go
+	GOOS=openbsd go build $(BUILD_FLAGS) -o $@ $^
 
 certgraph.linux.$(GIT_DATE).zip: certgraph.linux
 	zip $@ $^
@@ -26,4 +32,10 @@ certgraph.mac.$(GIT_DATE).zip: certgraph.mac
 certgraph.win.$(GIT_DATE).zip: certgraph.exe
 	zip $@ $^
 
-release: certgraph.linux.$(GIT_DATE).zip certgraph.mac.$(GIT_DATE).zip certgraph.win.$(GIT_DATE).zip
+certgraph.openbsd.$(GIT_DATE).zip: certgraph.openbsd
+	zip $@ $^
+
+release: certgraph.linux.$(GIT_DATE).zip certgraph.mac.$(GIT_DATE).zip certgraph.win.$(GIT_DATE).zip certgraph.openbsd.$(GIT_DATE).zip
+
+clean:
+	rm certgraph certgraph.linux certgraph.mac certgraph.exe certgraph.openbsd certgraph.*.zip

certgraph.go

@@ -31,6 +31,8 @@ var markedDomains = make(map[string]bool)
 var domainGraph = make(map[string]*DomainNode)
 var depth uint
 var save bool
+var git_date = "none"
+var git_hash = "DEADBEEF"
 
 // flags
 var port string
@@ -43,6 +45,7 @@ var sortCerts bool
 var savePath string
 var list bool
 var printJSON bool
+var ver bool
 
 // domain node conection status
 type domainStatus int
@@ -109,6 +112,7 @@ func (d *DomainNode) String() string {
 }
 
 func main() {
+	flag.BoolVar(&ver, "version", false, "print version and exit")
 	portPtr := flag.Uint("port", 443, "tcp port to connect to")
 	timeoutPtr := flag.Uint("timeout", 5, "tcp timeout in seconds")
 	flag.BoolVar(&verbose, "verbose", false, "verbose logging")
@@ -123,8 +127,13 @@ func main() {
 		fmt.Fprintf(os.Stderr, "Usage of %s: [OPTION]... HOST...\n", os.Args[0])
 		flag.PrintDefaults()
 	}
-
 	flag.Parse()
+
+	if ver {
+		fmt.Printf("Git commit: [%s] %s\n", git_date, git_hash)
+		return
+	}
+
 	if printJSON {
 		// these arguments conflict
 		sortCerts = true