fix: logic error in expand_variables (#1631)

internal/common/expand_variables.bzl

@@ -53,13 +53,13 @@ def expand_variables(ctx, s, outs = [], output_dir = False):
         ] if f]
     else:
         if s.find("$@") != -1 or s.find("$(@)") != -1:
-            if len(ctx.outputs.outs) > 1:
+            if len(outs) > 1:
                 fail("""$@ substitution may only be used with a single out
                 Upgrading rules_nodejs? Maybe you need to switch from $@ to $(RULEDIR)
                 See https://github.com/bazelbuild/rules_nodejs/releases/tag/0.42.0""")
-        additional_substitutions["@"] = ctx.outputs.outs[0].path
-        if len(ctx.outputs.outs) == 1:
-            output_dir = ctx.outputs.outs[0].dirname.split("/")
+        if len(outs) == 1:
+            additional_substitutions["@"] = outs[0].path
+            output_dir = outs[0].dirname.split("/")
         else:
             output_dir = rule_dir[:]
 

internal/node/npm_package_bin.bzl

@@ -36,9 +36,9 @@ def _inputs(ctx):
     return depset(ctx.files.data, transitive = inputs_depsets).to_list()
 
 def _impl(ctx):
-    if ctx.attr.output_dir and ctx.attr.outs:
+    if ctx.attr.output_dir and ctx.outputs.outs:
         fail("Only one of output_dir and outs may be specified")
-    if not ctx.attr.output_dir and not ctx.attr.outs:
+    if not ctx.attr.output_dir and not ctx.outputs.outs:
         fail("One of output_dir and outs must be specified")
 
     args = ctx.actions.args()
@@ -50,7 +50,7 @@ def _impl(ctx):
         outputs = ctx.outputs.outs
 
     for a in ctx.attr.args:
-        args.add_all([expand_variables(ctx, e, outs = ctx.attr.outs, output_dir = ctx.attr.output_dir) for e in _expand_locations(ctx, a)])
+        args.add_all([expand_variables(ctx, e, outs = ctx.outputs.outs, output_dir = ctx.attr.output_dir) for e in _expand_locations(ctx, a)])
 
     run_node(
         ctx,