feat: add nfctl(ctl to start nf project)

nft/nfctl/tp/parse.go

@@ -0,0 +1,80 @@
+package tp
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"strings"
+)
+
+func ParseCmd(pwd string, content []byte) ([]Cmd, error) {
+	var (
+		err   error
+		cmds  = make([]Cmd, 0)
+		start = false
+	)
+
+	scanner := bufio.NewScanner(bytes.NewReader(content))
+	scanner.Buffer(make([]byte, 1024), 1024*1024*10)
+
+	record := make([]string, 0)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if len(line) == 0 {
+			continue
+		}
+
+		if !start && strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		if strings.HasPrefix(line, "!") {
+			if start {
+				return nil, fmt.Errorf("invalid content: unEOF cmd block found")
+			}
+
+			start = true
+			record = append(record, line)
+			continue
+		}
+
+		if strings.HasPrefix(line, "EOF") {
+			start = false
+			if len(record) == 0 {
+				continue
+			}
+
+			var cmd Cmd
+			if cmd, err = ParseBlock(pwd, record); err != nil {
+				return nil, err
+			}
+
+			cmds = append(cmds, cmd)
+			record = record[:0]
+			continue
+		}
+
+		if start {
+			record = append(record, line)
+		}
+	}
+
+	if err = scanner.Err(); err != nil {
+		return nil, err
+	}
+
+	return cmds, err
+}
+
+func ParseBlock(pwd string, lines []string) (Cmd, error) {
+	switch lines[0] {
+	case "!replace content":
+		return newReplaceContent(pwd, lines[1:])
+	case "!replace name":
+		return newReplaceName(pwd, lines[1:])
+	case "!generate":
+		return newGenerate(pwd, lines[1:])
+	}
+
+	return nil, fmt.Errorf("invalid cmd block: unknown type: %s", lines[0])
+}