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main.go
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main.go
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package main
import (
"bufio"
"fmt"
"html/template"
"os"
"path/filepath"
"regexp"
"strings"
"sync"
)
var replacer *strings.Replacer
func init() {
replacer = strings.NewReplacer(":", ".",
"]", "",
"}", "",
"{", "",
"\"", "",
")", "",
"(", "",
"[", "",
",", "",
"var.", "",
" ", "",
)
}
var tf_file_ext = ".tf"
var var_prefix = "var."
var varTemplate = template.Must(template.New("var_file").Parse(`{{ range . }} variable "{{ . }}" {
description = ""
}
{{end}}
`))
func containsElement(slice []string, value string) bool {
if len(slice) == 0 {
return false
}
for _, s := range slice {
if value == s {
return true
}
}
return false
}
func getAllFiles(ext string) []string {
dir, err := os.Getwd()
if err != nil {
panic(err)
}
var files []string
err = filepath.Walk(dir, func(path string, f os.FileInfo, err error) error {
if err != nil {
fmt.Printf("prevent panic by handling failure accessing a path %q: %v\n", dir, err)
return err
}
if !f.IsDir() {
r, err := regexp.MatchString(ext, f.Name())
if err == nil && r {
files = append(files, f.Name())
fmt.Printf("Found file: %q\n", f.Name())
}
}
return nil
})
return files
}
func main() {
var parsed_vars []string
tf_files := getAllFiles(tf_file_ext)
var wg sync.WaitGroup
messages := make(chan string)
wg.Add(len(tf_files))
for _, file := range tf_files {
go func(file string) {
defer wg.Done()
fileHandle, _ := os.Open(file)
defer fileHandle.Close()
fileScanner := bufio.NewScanner(fileHandle)
for fileScanner.Scan() {
messages <- fileScanner.Text()
}
}(file)
}
go func() {
for text := range messages {
if strings.Contains(text, var_prefix) {
pattern := regexp.MustCompile(`var.([a-z?_]+)`)
match := pattern.FindAllStringSubmatch(text, 1)
if len(match) != 0 {
res := replacer.Replace(match[0][0])
if !containsElement(parsed_vars, res) {
parsed_vars = append(parsed_vars, res)
}
}
}
}
}()
wg.Wait()
err := varTemplate.Execute(os.Stdout, parsed_vars)
if err != nil {
panic(err)
}
}