d2ir: fix substitutions in imports

ci/release/changelogs/next.md

@@ -6,3 +6,4 @@
 
 - Fix executable plugins that implement standalone router [#1910](https://github.com/terrastruct/d2/pull/1910)
 - Fix compiler error with multiple nested spread substitutions [#1913](https://github.com/terrastruct/d2/pull/1913)
+- Fix substitutions from imports into different scopes [#1914](https://github.com/terrastruct/d2/pull/1914)

d2ir/compile.go

@@ -31,8 +31,7 @@ type compiler struct {
 	imports []string
 	// importStack is used to detect cyclic imports.
 	importStack []string
-	// importCache enables reuse of files imported multiple times.
+	seenImports map[string]struct{}
-	importCache map[string]*Map
 	utf16Pos    bool
 
 	// Stack of globs that must be recomputed at each new object in and below the current scope.
@@ -62,7 +61,7 @@ func Compile(ast *d2ast.Map, opts *CompileOptions) (*Map, []string, error) {
 		err: &d2parser.ParseError{},
 		fs:  opts.FS,
 
-		importCache: make(map[string]*Map),
+		seenImports: make(map[string]struct{}),
 		utf16Pos:    opts.UTF16Pos,
 	}
 	m := &Map{}

d2ir/import.go

@@ -82,16 +82,11 @@ func (c *compiler) __import(imp *d2ast.Import) (*Map, bool) {
 
 	// Only get immediate imports.
 	if len(c.importStack) == 2 {
-		if _, ok := c.importCache[impPath]; !ok {
+		if _, ok := c.seenImports[impPath]; !ok {
 			c.imports = append(c.imports, imp.PathWithPre())
 		}
 	}
 
-	ir, ok := c.importCache[impPath]
-	if ok {
-		return ir, true
-	}
-
 	var f fs.File
 	var err error
 	if c.fs == nil {
@@ -113,13 +108,13 @@ func (c *compiler) __import(imp *d2ast.Import) (*Map, bool) {
 		return nil, false
 	}
 
-	ir = &Map{}
+	ir := &Map{}
 	ir.initRoot()
 	ir.parent.(*Field).References[0].Context_.Scope = ast
 
 	c.compileMap(ir, ast, ast)
 
-	c.importCache[impPath] = ir
+	c.seenImports[impPath] = struct{}{}
 
 	return ir, true
 }

testdata/d2compiler/TestCompile/vars-in-imports.exp.json

@@ -371,7 +371,7 @@
         ],
         "attributes": {
           "label": {
-            "value": "Dev Environment"
+            "value": "Qa Environment"
           },
           "labelDimensions": {
             "width": 0,