Merge pull request #30 from srevinsaju/fix/srevin/error-on-empty-default

fix(data.env): fall back to empty string when default is unspecified

examples/env/togomak.hcl

@@ -0,0 +1,12 @@
+togomak {
+  version = 1
+}
+
+data "env" "HOME" {
+  key = "HOME"
+}
+
+stage "example" {
+  name   = "example"
+  script = "echo ${data.env.HOME.value}"
+}

pkg/blocks/data/env.go

@@ -94,7 +94,11 @@ func (e *EnvProvider) DecodeBody(body hcl.Body) hcl.Diagnostics {
 
 	e.keyParsed = key.AsString()
 
-	attr = content.Attributes["default"]
+  attr, ok := content.Attributes["default"]
+	if !ok {
+		e.def = ""
+		return diags
+	}
 	key, d = attr.Expr.Value(hclContext)
 	diags = diags.Extend(d)
 

tests/tests/failing/env-data-key-missing/togomak.hcl

@@ -0,0 +1,11 @@
+togomak {
+  version = 1
+}
+
+data "env" "hello" {
+}
+
+stage "example" {
+  name   = "example"
+  script = "echo hello world ${data.env.hello.value}"
+}