From e404cfe43603615cc9f8f5510f561828cfd0f216 Mon Sep 17 00:00:00 2001
From: afshar <afshar@google.com>
Date: Tue, 27 Jan 2015 13:08:25 -0800
Subject: [PATCH 1/4] Added ability to exec arbitrary commands from templates.
 Naughty, I know.

---
 helpers/execembed.go | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 helpers/execembed.go

diff --git a/helpers/execembed.go b/helpers/execembed.go
new file mode 100644
index 00000000000..8076dfdef1c
--- /dev/null
+++ b/helpers/execembed.go
@@ -0,0 +1,32 @@
+package helpers
+
+import (
+	"bytes"
+	"os/exec"
+
+	jww "github.com/spf13/jwalterweatherman"
+)
+
+func Exec(args ...string) string {
+	var out bytes.Buffer
+	var stderr bytes.Buffer
+  var arg []string
+  if len(args) == 0 {
+	  jww.ERROR.Print("Nothing to execute")
+    return "Nothing to execute"
+  }
+	name := args[0]
+	if len(args) > 1 {
+    arg = args[1 : len(args)-1]
+  }
+	cmd := exec.Command(name, arg...)
+	cmd.Stdout = &out
+	cmd.Stderr = &stderr
+	if err := cmd.Run(); err != nil {
+		jww.ERROR.Print("Error executing", err, stderr.String())
+		return stderr.String()
+	}
+	jww.ERROR.Print("It got here")
+
+	return out.String()
+}

From 007d91131e5c57b7b32266472974c8bf17408cef Mon Sep 17 00:00:00 2001
From: afshar <afshar@google.com>
Date: Tue, 27 Jan 2015 13:20:21 -0800
Subject: [PATCH 2/4] Now add the actual tempalte changes.

---
 tpl/template.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tpl/template.go b/tpl/template.go
index 3cf983ce035..ee7da443f93 100644
--- a/tpl/template.go
+++ b/tpl/template.go
@@ -831,6 +831,10 @@ func Highlight(in interface{}, lang string) template.HTML {
 	return template.HTML(helpers.Highlight(html.UnescapeString(str), lang))
 }
 
+func Exec(args ...string) template.HTML {
+	return template.HTML(helpers.Exec(args...))
+}
+
 func Markdownify(text string) template.HTML {
 	return template.HTML(helpers.RenderBytes(helpers.RenderingContext{Content: []byte(text), PageFmt: "markdown"}))
 }
@@ -1275,6 +1279,7 @@ func init() {
 		"delimit":     Delimit,
 		"sort":        Sort,
 		"highlight":   Highlight,
+		"exec":        Exec,
 		"add":         func(a, b interface{}) (interface{}, error) { return doArithmetic(a, b, '+') },
 		"sub":         func(a, b interface{}) (interface{}, error) { return doArithmetic(a, b, '-') },
 		"div":         func(a, b interface{}) (interface{}, error) { return doArithmetic(a, b, '/') },

From 90f60a3ae4c7b7a543713d5acd4f489d8541d89f Mon Sep 17 00:00:00 2001
From: afshar <afshar@google.com>
Date: Tue, 27 Jan 2015 13:25:41 -0800
Subject: [PATCH 3/4] Now add the actual tempalte changes.

---
 helpers/execembed.go | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/helpers/execembed.go b/helpers/execembed.go
index 8076dfdef1c..0b9ed7e709b 100644
--- a/helpers/execembed.go
+++ b/helpers/execembed.go
@@ -10,15 +10,15 @@ import (
 func Exec(args ...string) string {
 	var out bytes.Buffer
 	var stderr bytes.Buffer
-  var arg []string
-  if len(args) == 0 {
-	  jww.ERROR.Print("Nothing to execute")
-    return "Nothing to execute"
-  }
+	var arg []string
+	if len(args) == 0 {
+		jww.ERROR.Print("Nothing to execute")
+		return "Nothing to execute"
+	}
 	name := args[0]
 	if len(args) > 1 {
-    arg = args[1 : len(args)-1]
-  }
+		arg = args[1 : len(args)-1]
+	}
 	cmd := exec.Command(name, arg...)
 	cmd.Stdout = &out
 	cmd.Stderr = &stderr

From 9af1d1170fd88a9b00ad17321e8c1a582257d76d Mon Sep 17 00:00:00 2001
From: afshar <afshar@google.com>
Date: Tue, 27 Jan 2015 13:26:52 -0800
Subject: [PATCH 4/4] Remove debugging statement.

---
 helpers/execembed.go | 2 --
 1 file changed, 2 deletions(-)

diff --git a/helpers/execembed.go b/helpers/execembed.go
index 0b9ed7e709b..0fa7aac8788 100644
--- a/helpers/execembed.go
+++ b/helpers/execembed.go
@@ -26,7 +26,5 @@ func Exec(args ...string) string {
 		jww.ERROR.Print("Error executing", err, stderr.String())
 		return stderr.String()
 	}
-	jww.ERROR.Print("It got here")
-
 	return out.String()
 }