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godoc2md.go
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godoc2md.go
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package main
import (
"bufio"
"flag"
"fmt"
"os"
"regexp"
"strings"
)
var dst string
func init() {
flag.StringVar(&dst, "dst", "", "dst file: -dst filepath")
flag.Parse()
}
func main() {
var funcPattern string = `^func\s(\w+)\(.*?\).*?`
var methodPattern string = `^func\s\(\w+\s(\*?.*?)\)\s(\w+)\(.*?\).*?`
var typePattern string = `^type\s(.*?)\s(\w+)\s{`
fmt.Println(dst)
funcCompile, _ := regexp.Compile(funcPattern)
methodCompile, _ := regexp.Compile(methodPattern)
typeCompile, _ := regexp.Compile(typePattern)
dstfile, err := os.Create(dst)
check(err)
defer dstfile.Close()
scanner := bufio.NewScanner(os.Stdin)
defer os.Stdin.Close()
mflag := false
for scanner.Scan() {
line := scanner.Text()
//struct和interface内容单独判断
if mflag {
if strings.HasPrefix(line, " //") || line == "\n" {
continue
}
fmt.Fprintln(dstfile, line)
if line == "}" {
fmt.Fprint(dstfile, "```\n\n")
mflag = false
continue
}
}
//匹配普通函数func
if ok := funcCompile.MatchString(line); ok {
funcName := funcCompile.FindStringSubmatch(line)
fmt.Fprintf(dstfile, "###func %s\n", funcName[1])
withgo(dstfile, line)
fmt.Fprint(dstfile, "```\n\n")
}
//匹配method
if ok := methodCompile.MatchString(line); ok {
methodName := methodCompile.FindStringSubmatch(line)
fmt.Fprintf(dstfile, "###func (%s) %s\n", methodName[1], methodName[2])
withgo(dstfile, line)
fmt.Fprint(dstfile, "```\n\n")
}
//匹配struct和interface
if ok := typeCompile.MatchString(line); ok {
typeName := typeCompile.FindStringSubmatch(line)
fmt.Fprintf(dstfile, "###type %s %s\n", typeName[1], typeName[2])
withgo(dstfile, line)
mflag = true
}
}
fmt.Println("completed!")
}
func check(err error) {
if err != nil {
panic(err)
}
}
func withgo(f *os.File, line string) {
fmt.Fprint(f, "```go\n")
fmt.Fprintln(f, line)
}