Initial commit

providers/os/os.go

@@ -0,0 +1,64 @@
+package os
+
+import "os"
+import "io"
+import "html/template"
+import "git.tebibyte.media/sashakoshka/step"
+
+var _ step.FuncProvider = new(Provider)
+
+// Provider provides OS functions.
+type Provider struct {
+	
+}
+
+// FuncMap fulfills the step.FuncProvider interface.
+func (this *Provider) FuncMap () template.FuncMap {
+	return template.FuncMap {
+		"fileExists": funcFileExists,
+		"readFile":   funcReadFile,
+		"readDir":    funcReadDir,
+		"writeFile":  funcWriteFile,
+		"renameFile": funcRenameFile,
+		"removeFile": funcRemoveFile,
+	}
+}
+
+func funcFileExists (name string) (bool) {
+	_, err := os.Stat(name)
+	return err == nil
+}
+
+func funcReadFile (name string) (string, error) {
+	file, err := os.Open(name)
+	if err != nil { return "", err  }
+	defer file.Close()
+	buffer, err := io.ReadAll(file)
+	if err != nil { return "", err  }
+	return string(buffer), nil
+}
+
+func funcReadDir (name string) ([]string, error) {
+	entries, err := os.ReadDir(name)
+	if err != nil { return nil, err }
+	names := make([]string, len(entries))
+	for index, entry := range entries {
+		names[index] = entry.Name()
+	}
+	return names, nil
+}
+
+func funcWriteFile (name, content string) error {
+	file, err := os.Create(name)
+	if err != nil { return err }
+	_, err = io.WriteString(file, content)
+	return err
+}
+
+func funcRenameFile (name, newName string) error {
+	return os.Rename(name, newName)
+}
+
+func funcRemoveFile (name string) error {
+	return os.Remove(name)
+}