Fix string(content) (which can be big) makes a copy of the content

silvin-lubecki · silvin-lubecki · commit 77bdd838a14f · 2018-05-28T12:00:03.000+02:00
Signed-off-by: Silvin Lubecki &lt;silvin.lubecki@docker.com&gt;
diff --git a/packager/init.go b/packager/init.go
@@ -17,7 +17,7 @@ import (
 
 func prependToFile(filename, text string) {
 	content, _ := ioutil.ReadFile(filename)
-	content = []byte(text + string(content))
+	content = append([]byte(text), content...)
 	ioutil.WriteFile(filename, content, 0644)
 }
 

Original file line number	Diff line number	Diff line change
`@@ -17,7 +17,7 @@ import (`
`17`	`17`
`18`	`18`	`func prependToFile(filename, text string) {`
`19`	`19`	`content, _ := ioutil.ReadFile(filename)`
`20`		`- content = []byte(text + string(content))`
	`20`	`+ content = append([]byte(text), content...)`
`21`	`21`	`ioutil.WriteFile(filename, content, 0644)`
`22`	`22`	`}`
`23`	`23`