command: expand ~ manually in var-file [GH-273]

CHANGELOG.md

@@ -11,6 +11,7 @@ BUG FIXES:
 
   * core: Fix certain syntax of configuration that could cause hang. [GH-261]
   * core: `-no-color` flag properly disables color. [GH-250]
+  * core: "~" is expanded in `-var-file` flags. [GH-273]
   * providers/aws: Refreshing EIP from pre-0.2 state file won't error. [GH-258]
   * providers/google: Attaching a disk source (not an image) works
       properly. [GH-254]

command/flag_var.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 
 	"github.com/hashicorp/hcl"
+	"github.com/mitchellh/go-homedir"
 )
 
 // FlagVar is a flag.Value implementation for parsing user variables
@@ -56,7 +57,13 @@ func (v *FlagVarFile) Set(raw string) error {
 	return nil
 }
 
-func loadVarFile(path string) (map[string]string, error) {
+func loadVarFile(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 {