Allow missing SCONS_FLAGS keys when registering builds

package.json

@@ -1,11 +1,14 @@
 {
   "packageManager": "[email protected]",
   "scripts": {
-    "postinstall": "husky"
+    "postinstall": "husky",
+    "prepack": "pinst --disable",
+    "postpack": "pinst --enable"
   },
   "devDependencies": {
     "cspell": "^8.0.0",
     "husky": "^9.0.0",
+    "pinst": "^3.0.0",
     "prettier": "^3.0.0"
   }
 }

pyproject.toml

@@ -85,7 +85,7 @@ src = "miniscons"
 lint = [
     "npx cspell . --dot --gitignore",
     "pylint src --disable=C0114,C0115,C0116,C0411,C3001",
-    "mypy -m src --ignore-missing-import",
+    "mypy src --ignore-missing-import",
     "trufflehog3",
 ]
 

src/build.py

@@ -31,7 +31,10 @@ def path(self, file: str) -> str:
         return f"{root.replace('.', '-')}-[{self.name}]"
 
     def merge(self, env: Environment) -> dict[str, list[str]]:
-        merged = {k: unique(env[k] + self.packages.get(k, [])) for k in SCONS_FLAGS}
+        merged = {
+            k: unique(env.get(k, []) + self.packages.get(k, [])) for k in SCONS_FLAGS
+        }
+
         merged["CXXFLAGS"] += self.flags
         return merged
 

src/containers.py

@@ -1,10 +1,20 @@
 from functools import reduce
+from typing import TypeVar
 
+T = TypeVar("T")
+U = TypeVar("U")
 
-def unique(lst: list[str]) -> list[str]:
-    empty = []  # type: list[str]
+
+def unique(lst: list[T]) -> list[T]:
+    empty = []  # type: list[T]
     return list(reduce(lambda acc, x: acc if x in acc else [*acc, x], lst, empty))
 
 
-def flatten(ignore: list[str | list[str]]) -> list[str]:
+def flatten(ignore: list[T | list[T]]) -> list[T]:
     return list(sum(map(lambda x: x if isinstance(x, list) else [x], ignore), []))
+
+
+def merge_maps(
+    x: dict[T, list[U]], y: dict[T, list[U]], keys: list[T]
+) -> dict[T, list[U]]:
+    return {k: unique(x.get(k, []) + y.get(k, [])) for k in keys}

test/test_containers.py

@@ -1,4 +1,4 @@
-from src.containers import flatten, unique
+from src.containers import flatten, merge_maps, unique
 
 
 def test_unique():
@@ -7,3 +7,8 @@ def test_unique():
 
 def test_flatten():
     assert flatten(["a", ["b", "c"]]) == ["a", "b", "c"]
+
+
+def test_merge_maps():
+    assert merge_maps({}, {}, ["a"]) == {"a": []}
+    assert merge_maps({"a": [1]}, {"a": [2, 3]}, ["a"]) == {"a": [1, 2, 3]}