From 85994fcfc07460e40817fa8eed76ac43dfd694a0 Mon Sep 17 00:00:00 2001
From: Stephen J Day <stephen.day@docker.com>
Date: Wed, 7 Dec 2016 13:44:37 -0800
Subject: [PATCH] digest: add FromString helper to Digest

Signed-off-by: Stephen J Day <stephen.day@docker.com>
---
 digest/digest.go   | 5 +++++
 digest/digester.go | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/digest/digest.go b/digest/digest.go
index 31d821bb..65c6f7f0 100644
--- a/digest/digest.go
+++ b/digest/digest.go
@@ -80,6 +80,11 @@ func FromBytes(p []byte) Digest {
 	return Canonical.FromBytes(p)
 }
 
+// FromString digests the input and returns a Digest.
+func FromString(s string) Digest {
+	return Canonical.FromString(s)
+}
+
 // Validate checks that the contents of d is a valid digest, returning an
 // error if not.
 func (d Digest) Validate() error {
diff --git a/digest/digester.go b/digest/digester.go
index f3105a45..0435a1a6 100644
--- a/digest/digester.go
+++ b/digest/digester.go
@@ -129,6 +129,11 @@ func (a Algorithm) FromBytes(p []byte) Digest {
 	return digester.Digest()
 }
 
+// FromString digests the string input and returns a Digest.
+func (a Algorithm) FromString(s string) Digest {
+	return a.FromBytes([]byte(s))
+}
+
 // TODO(stevvooe): Allow resolution of verifiers using the digest type and
 // this registration system.