Add embed_fs examples

Author: devlights

internal/examples/basic/embeds/data/dotnet.txt

@@ -0,0 +1 @@
+dotnet

internal/examples/basic/embeds/data/go.txt

@@ -0,0 +1 @@
+golang

internal/examples/basic/embeds/data/python.txt

@@ -0,0 +1 @@
+python

internal/examples/basic/embeds/embed_fs_multifiles.go

@@ -0,0 +1,58 @@
+package embeds
+
+import (
+	"embed"
+	"fmt"
+
+	"github.com/devlights/gomy/output"
+)
+
+//go:embed data
+//go:embed helloworld.txt
+var content embed.FS
+
+func EmbedFsMultifiles() error {
+	var (
+		buf []byte
+		err error
+	)
+
+	//
+	// 埋め込まれたファイルの操作
+	//
+	buf, err = content.ReadFile("helloworld.txt")
+	if err != nil {
+		return err
+	}
+
+	output.Stdoutl("[helloworld.txt]", string(buf))
+	output.StdoutHr()
+
+	//
+	// 埋め込まれたディレクトリの操作
+	//
+	dirs, err := content.ReadDir("data")
+	if err != nil {
+		return err
+	}
+
+	for _, entry := range dirs {
+		if entry.IsDir() {
+			continue
+		}
+
+		var (
+			name = entry.Name()
+			path = fmt.Sprintf("data/%s", name)
+		)
+
+		buf, err = content.ReadFile(path)
+		if err != nil {
+			return err
+		}
+
+		output.Stdoutl(fmt.Sprintf("[%s]", name), string(buf))
+	}
+
+	return nil
+}

internal/examples/basic/embeds/embed_fs_singlefile.go

@@ -0,0 +1,27 @@
+package embeds
+
+import (
+	"embed"
+	"encoding/hex"
+	"os"
+)
+
+//go:embed helloworld.txt
+var f embed.FS
+
+// EmbedFsSingleFile は、embed パッケージの機能を確認するサンプルです (embed.FSとして単独ファイルを操作)
+func EmbedFsSingleFile() error {
+	b, err := f.ReadFile("helloworld.txt")
+	if err != nil {
+		return err
+	}
+
+	dumper := hex.Dumper(os.Stdout)
+	defer dumper.Close()
+
+	if _, err := dumper.Write(b); err != nil {
+		return err
+	}
+
+	return nil
+}

internal/examples/basic/embeds/examples.go

@@ -17,4 +17,6 @@ func NewRegister() mappings.Register {
 func (r *register) Regist(m mappings.ExampleMapping) {
 	m["embed_string"] = EmbedString
 	m["embed_bytes"] = EmbedBytes
+	m["embed_fs_singlefile"] = EmbedFsSingleFile
+	m["embed_fs_multifiles"] = EmbedFsMultifiles
 }