packer-cn/builder/vmware/common/vmx.go

108 lines
2.2 KiB
Go
Executable File

package common
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"regexp"
"sort"
"strings"
)
// ParseVMX parses the keys and values from a VMX file and returns
// them as a Go map.
func ParseVMX(contents string) map[string]string {
results := make(map[string]string)
lineRe := regexp.MustCompile(`^(.+?)\s*=\s*"?(.*?)"?\s*$`)
for _, line := range strings.Split(contents, "\n") {
matches := lineRe.FindStringSubmatch(line)
if matches == nil {
continue
}
key := strings.ToLower(matches[1])
results[key] = matches[2]
}
return results
}
// EncodeVMX takes a map and turns it into valid VMX contents.
func EncodeVMX(contents map[string]string) string {
var buf bytes.Buffer
i := 0
keys := make([]string, len(contents))
for k := range contents {
keys[i] = k
i++
}
// a list of VMX key fragments that the value must not be quoted
// fragments are used to cover multliples (i.e. multiple disks)
// keys are still lowercase at this point, use lower fragments
noQuotes := []string{
".virtualssd",
}
// a list of VMX key fragments that are case sensitive
// fragments are used to cover multliples (i.e. multiple disks)
caseSensitive := []string{
".virtualSSD",
}
sort.Strings(keys)
for _, k := range keys {
pat := "%s = \"%s\"\n"
// items with no quotes
for _, q := range noQuotes {
if strings.Contains(k, q) {
pat = "%s = %s\n"
break
}
}
key := k
// case sensitive key fragments
for _, c := range caseSensitive {
key = strings.Replace(key, strings.ToLower(c), c, 1)
}
buf.WriteString(fmt.Sprintf(pat, key, contents[k]))
}
return buf.String()
}
// WriteVMX takes a path to a VMX file and contents in the form of a
// map and writes it out.
func WriteVMX(path string, data map[string]string) (err error) {
log.Printf("Writing VMX to: %s", path)
f, err := os.Create(path)
if err != nil {
return
}
defer f.Close()
var buf bytes.Buffer
buf.WriteString(EncodeVMX(data))
if _, err = io.Copy(f, &buf); err != nil {
return
}
return
}
// ReadVMX takes a path to a VMX file and reads it into a k/v mapping.
func ReadVMX(path string) (map[string]string, error) {
data, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
return ParseVMX(string(data)), nil
}