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main.go
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main.go
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package main
import (
"bufio"
"bytes"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"os/exec"
"strconv"
)
// writeFile writes content to a file
func writeFile(filePath string, data []byte) {
if _, err := os.Stat(filePath); os.IsNotExist(err) {
log.Fatalf("no such file: %s make sure running from the root of the repo directory", filePath)
}
fmt.Printf("Writing new %s\n", filePath)
err := ioutil.WriteFile(filePath, data, os.FileMode(0664))
if err != nil {
log.Fatalf("Error writing '%s': %s", filePath, err)
}
}
type fileInfo struct {
path string
varName string
srcPath string
description string
}
func buildMetaDataFile() {
var files []fileInfo
files = append(files,
fileInfo{
path: "disposable.txt",
varName: "disposableDomains",
srcPath: "../../metadata_disposable.go",
description: "// map to store disposable domains data",
},
fileInfo{
path: "free.txt",
varName: "freeDomains",
srcPath: "../../metadata_free.go",
description: "// map to store free domains data",
},
fileInfo{
path: "role.txt",
varName: "roleAccounts",
srcPath: "../../metadata_role.go",
description: "// map to store role-based accounts data",
},
)
for _, f := range files {
log.Printf("Building map for: %s\n", f.path)
file, err := os.Open(f.path)
if err != nil {
panic(fmt.Sprintf("open meta data f %s fail: %v ", f, err))
}
output := bytes.Buffer{}
output.WriteString("package emailverifier\n\n")
output.WriteString(f.description + "\n")
output.WriteString(fmt.Sprintf("var %s = map[string]bool {\n", f.varName))
scanner := bufio.NewScanner(file)
scanner.Split(bufio.ScanLines)
data := make(map[string]bool)
for scanner.Scan() {
key := scanner.Text()
if !data[key] {
output.WriteString("\t")
output.WriteString(strconv.Quote(key))
output.WriteString(": ")
output.WriteString("true")
output.WriteString(",\n")
}
data[key] = true
}
output.WriteString("}")
log.Printf("Read %d mappings in %s\n", len(data), f.path)
err = file.Close()
if err != nil {
panic(fmt.Sprintf("close role meta data file %s fail: %v ", f.path, err))
}
writeFile(f.srcPath, output.Bytes())
}
}
func updateMetaData() {
cmd := exec.Command(
"/bin/bash",
"-c",
"./update.sh",
)
stdout, err := cmd.StdoutPipe()
if err != nil {
log.Fatalf("error calling update.sh to update meta data: %s", err.Error())
}
stderr, err := cmd.StderrPipe()
if err != nil {
log.Fatalf("error calling update.sh to update meta data: %s", err.Error())
}
if err = cmd.Start(); err != nil {
log.Fatalf("error executing update.sh to update meta data: %s", err.Error())
}
data, err := ioutil.ReadAll(stderr)
if err != nil {
log.Fatalf("error reading update.sh result: %s : %s", err.Error(), data)
}
outputBuf := bufio.NewReader(stdout)
for {
output, _, err := outputBuf.ReadLine()
if err != nil {
if err != io.EOF {
log.Fatal(err)
}
break
}
log.Println(string(output))
}
if err = cmd.Wait(); err != nil {
log.Fatal(err)
}
}
func main() {
updateMetaData()
buildMetaDataFile()
}