terraform/command/flag_kv.go

106 lines
2.1 KiB
Go

package command
import (
"fmt"
"io/ioutil"
"strings"
"github.com/hashicorp/hcl"
"github.com/mitchellh/go-homedir"
)
// FlagKV is a flag.Value implementation for parsing user variables
// from the command-line in the format of '-var key=value'.
type FlagKV map[string]string
func (v *FlagKV) String() string {
return ""
}
func (v *FlagKV) Set(raw string) error {
idx := strings.Index(raw, "=")
if idx == -1 {
return fmt.Errorf("No '=' value in arg: %s", raw)
}
if *v == nil {
*v = make(map[string]string)
}
key, value := raw[0:idx], raw[idx+1:]
(*v)[key] = value
return nil
}
// FlagKVFile is a flag.Value implementation for parsing user variables
// from the command line in the form of files. i.e. '-var-file=foo'
type FlagKVFile map[string]string
func (v *FlagKVFile) String() string {
return ""
}
func (v *FlagKVFile) Set(raw string) error {
vs, err := loadKVFile(raw)
if err != nil {
return err
}
if *v == nil {
*v = make(map[string]string)
}
for key, value := range vs {
(*v)[key] = value
}
return nil
}
func loadKVFile(rawPath string) (map[string]string, error) {
path, err := homedir.Expand(rawPath)
if err != nil {
return nil, fmt.Errorf(
"Error expanding path: %s", err)
}
// Read the HCL file and prepare for parsing
d, err := ioutil.ReadFile(path)
if err != nil {
return nil, fmt.Errorf(
"Error reading %s: %s", path, err)
}
// Parse it
obj, err := hcl.Parse(string(d))
if err != nil {
return nil, fmt.Errorf(
"Error parsing %s: %s", path, err)
}
var result map[string]string
if err := hcl.DecodeObject(&result, obj); err != nil {
return nil, fmt.Errorf(
"Error decoding Terraform vars file: %s\n\n"+
"The vars file should be in the format of `key = \"value\"`.\n"+
"Decoding errors are usually caused by an invalid format.",
err)
}
return result, nil
}
// FlagStringSlice is a flag.Value implementation for parsing targets from the
// command line, e.g. -target=aws_instance.foo -target=aws_vpc.bar
type FlagStringSlice []string
func (v *FlagStringSlice) String() string {
return ""
}
func (v *FlagStringSlice) Set(raw string) error {
*v = append(*v, raw)
return nil
}