From e8b7dedbe3ad8668f32e99d86799c4897c488edf Mon Sep 17 00:00:00 2001
From: cezkuj <cezkuj@gmail.com>
Date: Mon, 15 Apr 2019 21:07:42 +0000
Subject: [PATCH 1/2] Resolving #21 issue. Adding ko version and simple release
 script

---
 README.md          |  3 +++
 cmd/ko/commands.go |  8 ++++++++
 cmd/ko/version.go  | 41 +++++++++++++++++++++++++++++++++++++++++
 hack/release.sh    | 30 ++++++++++++++++++++++++++++++
 4 files changed, 82 insertions(+)
 create mode 100644 cmd/ko/version.go
 create mode 100755 hack/release.sh

diff --git a/README.md b/README.md
index 6909ab3f22..9f6a829df6 100644
--- a/README.md
+++ b/README.md
@@ -254,6 +254,9 @@ This flag is still experimental, and feedback is very welcome.
 `ko delete` simply passes through to `kubectl delete`. It is exposed purely out
 of convenience for cleaning up resources created through `ko apply`.
 
+### `ko version`
+
+`ko version` prints version of ko. For not released binaries it will print hash of latest commit in current git tree.
 
 ## With `minikube`
 
diff --git a/cmd/ko/commands.go b/cmd/ko/commands.go
index c04a1dc899..18239733c5 100644
--- a/cmd/ko/commands.go
+++ b/cmd/ko/commands.go
@@ -64,6 +64,14 @@ func addKubeCommands(topLevel *cobra.Command) {
 		},
 	})
 
+        topLevel.AddCommand(&cobra.Command{
+                Use:   "version",
+                Short: `Print ko version.`,
+                Run: func(cmd *cobra.Command, args []string) {
+                  version()
+                },
+        })
+
 	koApplyFlags := []string{}
 	lo := &LocalOptions{}
 	bo := &BinaryOptions{}
diff --git a/cmd/ko/version.go b/cmd/ko/version.go
new file mode 100644
index 0000000000..e5a120d2b5
--- /dev/null
+++ b/cmd/ko/version.go
@@ -0,0 +1,41 @@
+// Copyright 2019 Google LLC All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"fmt"
+	"log"
+	"os/exec"
+)
+
+// provided by govvv in compile-time
+var Version string
+
+func version() {
+	if Version == "" {
+		hash, err := gitRevParseHead()
+		if err != nil {
+			log.Fatalf("error during command execution: %v", err)
+		}
+		fmt.Printf("version: %v", string(hash))
+	} else {
+		fmt.Printf("version: %v\n", Version)
+	}
+}
+
+func gitRevParseHead() ([]byte, error) {
+	cmd := exec.Command("git", "rev-parse", "HEAD")
+	return cmd.Output()
+}
diff --git a/hack/release.sh b/hack/release.sh
new file mode 100755
index 0000000000..bcf350e8ea
--- /dev/null
+++ b/hack/release.sh
@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+# Copyright 2019 Google LLC All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Usage:
+#   hack/release.sh $VERSION
+#
+# Example:
+#   hack/release.sh v0.2
+
+VERSION=$1
+
+KO_ROOT="$(cd "$(dirname "$0")" && pwd)/.."
+
+go get github.com/ahmetb/govvv
+govvv build -o $KO_ROOT/build/ko $KO_ROOT/cmd/ko -version $VERSION
+git tag $VERSION
+git push origin $VERSION

From 672e47860281a7f7be0dbda50692924c6f3abd74 Mon Sep 17 00:00:00 2001
From: cezkuj <cezkuj@gmail.com>
Date: Fri, 17 May 2019 05:53:06 +0000
Subject: [PATCH 2/2] Resolving #21 issue. Adding git-dir flag to always
 execute inside ko's directory in GOPATH

---
 pkg/commands/version.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkg/commands/version.go b/pkg/commands/version.go
index b5f21bbe54..e07fe7e2b0 100644
--- a/pkg/commands/version.go
+++ b/pkg/commands/version.go
@@ -17,6 +17,7 @@ package commands
 import (
 	"fmt"
 	"log"
+	"os"
 	"os/exec"
 	"strings"
 
@@ -39,7 +40,8 @@ func addVersion(topLevel *cobra.Command) {
 
 func version() {
 	if Version == "" {
-		hash, err := exec.Command("git", "rev-parse", "HEAD").Output()
+		gitDir := fmt.Sprintf("--git-dir=%v/src/github.com/google/ko/.git", os.Getenv("GOPATH"))
+		hash, err := exec.Command("git", gitDir, "rev-parse", "HEAD").Output()
 		if err != nil {
 			log.Fatalf("error during command execution: %v", err)
 		}