👌 IMPROVE: Add hash method to Jinja context (#5)

Author: jacobtomlinson

tests/example_src/example4.j2

@@ -0,0 +1 @@
+{{ "src/example1.scss" | compiled_name }}?digest={{ "src/example1.scss" | hash }}

tests/test_run_compile.py

@@ -128,6 +128,32 @@ def test_jinja_basic(src_folder: Path):
     assert "b" in (src_folder / "dist" / "example1.txt").read_text("utf8")
 
 
+def test_jinja_hash(src_folder: Path):
+    config = create_config(
+        src_folder,
+        {
+            "sass": {
+                "files": {
+                    "src/example1.scss": "dist/example1.css",
+                },
+                "precision": 5,
+                "sourcemap": True,
+                "format": "compressed",
+                "encoding": "utf8",
+            },
+            "jinja": {
+                "files": {"src/example4.j2": "dist/example4.txt"},
+            },
+        },
+    )
+    result = CliRunner().invoke(run_compile, ["-c", str(config)])
+    assert result.exit_code == 3, result.output
+    assert (src_folder / "dist" / "example4.txt").exists(), result.output
+    assert "example1.css?digest=" in (src_folder / "dist" / "example4.txt").read_text(
+        "utf8"
+    )
+
+
 def test_full(src_folder: Path):
     config = create_config(
         src_folder,

web_compile/__init__.py

@@ -424,7 +424,14 @@ def _get_compiled_name(path):
             raise KeyError(f"No compiled path: {path}")
         return file_map.get(Path(path)).name
 
+    def _get_hash(path):
+        if not path or Path(path) not in file_map:
+            raise KeyError(f"No compiled path: {path}")
+        input_path = root / Path(path)
+        return hash_file(input_path.read_text("utf8"))
+
     jinja_env.filters["compiled_name"] = _get_compiled_name
+    jinja_env.filters["hash"] = _get_hash
     for input_str, output_str in (jinja_files or {}).items():
         input_path = root / input_str
         output_path = root / output_str