template variables may be entirely unknown

While the evaluator can deal with unknown template variables, if the entire map of variables is unknown, we can't create the map and need to short-circuit the call.
hashicorp · Nov 27, 2024 · 833b074 · 833b074
1 parent 31fdb1f
commit 833b074
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diff --git a/internal/lang/funcs/filesystem.go b/internal/lang/funcs/filesystem.go
@@ -137,7 +137,7 @@ func MakeTemplateFileFunc(baseDir string, funcsCb func() (funcs map[string]funct
 
 			vars, varsMarks := args[1].UnmarkDeep()
 
-			if !pathArg.IsKnown() {
+			if !pathArg.IsKnown() || !vars.IsKnown() {
 				return cty.UnknownVal(retType).WithMarks(pathMarks, varsMarks), nil
 			}
 

diff --git a/internal/lang/funcs/filesystem_test.go b/internal/lang/funcs/filesystem_test.go
@@ -216,6 +216,12 @@ func TestTemplateFile(t *testing.T) {
 			cty.StringVal("- a\n- b\n- c\n").Mark("path").Mark("var"),
 			``,
 		},
+		{
+			cty.StringVal("testdata/list.tmpl").Mark("path"),
+			cty.UnknownVal(cty.Map(cty.String)),
+			cty.DynamicVal.Mark("path"),
+			``,
+		},
 		{
 			cty.StringVal("testdata/list.tmpl").Mark("path"),
 			cty.ObjectVal(map[string]cty.Value{