A Concise Go embed Tutorial
A Concise Go embed Tutorial Embedding For a single file, you can embed it as string or []byte For multiple files and directories, you can embed them as a new filesystem (FS) Import the “embed” package even if it is not explicitly used The go:embed directive is used for embedding and must be followed by the target variable name Only string, []byte, and embed.FS are supported. Aliases and named types (e.g., type S string) are not allowed Uses relative paths string/[]byte package main import ( _ "embed" "fmt" ) //go:embed hello.txt var s string //go:embed hello.txt var b []byte func main() { fmt.Println(s) fmt.Println(b) } embed.FS package main import ( "embed" "fmt" ) //go:embed hello.txt hello2.txt //go:embed "p/he llo.txt" //go:embed `p/hello-2.txt` //go:embed dir var f embed.FS func main() { data, _ := f.ReadFile("hello.txt") fmt.Println(string(data)) data, _ = f.ReadFile("hello2.txt") fmt.Println(string(data)) data, _ := f.ReadFile("p/he llo.txt") fmt.Println(string(data)) data, _ = f.ReadFile("p/hello-2.txt") fmt.Println(string(data)) } Matching patterns go:embed can take just a directory name. All files and directories inside, except those starting with . and _, are embedded. Subdirectories are embedded recursively to form a filesystem for that directory.
