1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
package cmd
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"os"
"time"
"github.com/nihei9/maleeni/compiler"
"github.com/nihei9/maleeni/spec"
"github.com/spf13/cobra"
)
func init() {
cmd := &cobra.Command{
Use: "compile",
Short: "Compile a lexical specification into a DFA",
Long: `compile takes a lexical specification and generates a DFA accepting the tokens described in the specification.`,
Example: ` cat lexspec.json | maleeni compile > clexspec.json`,
RunE: runCompile,
}
rootCmd.AddCommand(cmd)
}
func runCompile(cmd *cobra.Command, args []string) (retErr error) {
var lspec *spec.LexSpec
{
data, err := ioutil.ReadAll(os.Stdin)
if err != nil {
return err
}
lspec = &spec.LexSpec{}
err = json.Unmarshal(data, lspec)
if err != nil {
return err
}
}
var w io.Writer
{
f, err := os.OpenFile("maleeni-compile.log", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
return err
}
defer f.Close()
w = f
}
fmt.Fprintf(w, `maleeni compile starts.
Date time: %v
---
`, time.Now().Format(time.RFC3339))
defer func() {
fmt.Fprintf(w, "---\n")
if retErr != nil {
fmt.Fprintf(w, "maleeni compile failed: %v\n", retErr)
} else {
fmt.Fprintf(w, "maleeni compile succeeded.\n")
}
}()
clspec, err := compiler.Compile(lspec, compiler.EnableLogging(w))
if err != nil {
return err
}
out, err := json.Marshal(clspec)
if err != nil {
return err
}
fmt.Fprintf(os.Stdout, "%v\n", string(out))
return nil
}
|
