From f95811e65bcc674ae32c19c043b29226a56a6a5f Mon Sep 17 00:00:00 2001
From: Philip Schlump <pschlump@gmail.com>
Date: Sat, 6 Oct 2018 08:27:12 -0600
Subject: [PATCH] cmd/abigen: support for --type flag with piped data (#17648)

---
 cmd/abigen/main.go | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/cmd/abigen/main.go b/cmd/abigen/main.go
index 3ac37ba7ad..d19164b18d 100644
--- a/cmd/abigen/main.go
+++ b/cmd/abigen/main.go
@@ -75,7 +75,7 @@ func main() {
 		bins  []string
 		types []string
 	)
-	if *solFlag != "" || *abiFlag == "-" {
+	if *solFlag != "" || (*abiFlag == "-" && *pkgFlag == "") {
 		// Generate the list of types to exclude from binding
 		exclude := make(map[string]bool)
 		for _, kind := range strings.Split(*excFlag, ",") {
@@ -111,7 +111,13 @@ func main() {
 		}
 	} else {
 		// Otherwise load up the ABI, optional bytecode and type name from the parameters
-		abi, err := ioutil.ReadFile(*abiFlag)
+		var abi []byte
+		var err error
+		if *abiFlag == "-" {
+			abi, err = ioutil.ReadAll(os.Stdin)
+		} else {
+			abi, err = ioutil.ReadFile(*abiFlag)
+		}
 		if err != nil {
 			fmt.Printf("Failed to read input ABI: %v\n", err)
 			os.Exit(-1)
@@ -155,6 +161,5 @@ func contractsFromStdin() (map[string]*compiler.Contract, error) {
 	if err != nil {
 		return nil, err
 	}
-
 	return compiler.ParseCombinedJSON(bytes, "", "", "", "")
 }