Style: Integrate #pragma once in builders/checks

.pre-commit-config.yaml

@@ -154,7 +154,6 @@ repos:
         language: python
         entry: python misc/scripts/header_guards.py
         files: \.(h|hpp|hh|hxx)$
-        exclude: ^.*/(dummy|thread|platform_config|platform_gl)\.h$
 
       - id: file-format
         name: file-format

core/extension/make_interface_dumper.py

@@ -14,8 +14,7 @@ def run(target, source, env):
 
         g.write(
             """/* THIS FILE IS GENERATED DO NOT EDIT */
-#ifndef GDEXTENSION_INTERFACE_DUMP_H
-#define GDEXTENSION_INTERFACE_DUMP_H
+#pragma once
 
 #ifdef TOOLS_ENABLED
 
@@ -49,7 +48,5 @@ class GDExtensionInterfaceDump {
 };
 
 #endif // TOOLS_ENABLED
-
-#endif // GDEXTENSION_INTERFACE_DUMP_H
 """
         )

core/extension/make_wrappers.py

@@ -119,10 +119,7 @@ def generate_ex_version(argcount, const=False, returns=False):
 def run(target, source, env):
     max_versions = 12
 
-    txt = """
-#ifndef GDEXTENSION_WRAPPERS_GEN_H
-#define GDEXTENSION_WRAPPERS_GEN_H
-"""
+    txt = "#pragma once"
 
     for i in range(max_versions + 1):
         txt += "\n/* Extension Wrapper " + str(i) + " Arguments */\n"
@@ -138,7 +135,5 @@ def run(target, source, env):
         txt += generate_mod_version(i, True, False)
         txt += generate_mod_version(i, True, True)
 
-    txt += "\n#endif\n"
-
     with open(str(target[0]), "w", encoding="utf-8", newline="\n") as f:
         f.write(txt)

core/object/make_virtuals.py

@@ -207,8 +207,7 @@ def run(target, source, env):
     max_versions = 12
 
     txt = """/* THIS FILE IS GENERATED DO NOT EDIT */
-#ifndef GDVIRTUAL_GEN_H
-#define GDVIRTUAL_GEN_H
+#pragma once
 
 #include "core/object/script_instance.h"
 
@@ -257,7 +256,5 @@ def run(target, source, env):
         txt += generate_version(i, True, False, False, True)
         txt += generate_version(i, True, True, False, True)
 
-    txt += "#endif // GDVIRTUAL_GEN_H\n"
-
     with open(str(target[0]), "w", encoding="utf-8", newline="\n") as f:
         f.write(txt)

gles3_builders.py

@@ -209,13 +209,11 @@ def build_gles3_header(
         defvariant = ""
 
         fd.write("/* WARNING, THIS FILE WAS GENERATED, DO NOT EDIT */\n")
+        fd.write("#pragma once\n")
 
         out_file_base = out_file
         out_file_base = out_file_base[out_file_base.rfind("/") + 1 :]
         out_file_base = out_file_base[out_file_base.rfind("\\") + 1 :]
-        out_file_ifdef = out_file_base.replace(".", "_").upper()
-        fd.write("#ifndef " + out_file_ifdef + class_suffix + "_GLES3\n")
-        fd.write("#define " + out_file_ifdef + class_suffix + "_GLES3\n")
 
         out_file_class = (
             out_file_base.replace(".glsl.gen.h", "").title().replace("_", "").replace(".", "") + "Shader" + class_suffix
@@ -580,8 +578,7 @@ def build_gles3_header(
 
         fd.write("\t}\n\n")
 
-        fd.write("};\n\n")
-        fd.write("#endif\n")
+        fd.write("};\n")
 
 
 def build_gles3_headers(target, source, env):

glsl_builders.py

@@ -106,7 +106,6 @@ def build_rd_header(
     out_file_base = out_file
     out_file_base = out_file_base[out_file_base.rfind("/") + 1 :]
     out_file_base = out_file_base[out_file_base.rfind("\\") + 1 :]
-    out_file_ifdef = out_file_base.replace(".", "_").upper()
     out_file_class = out_file_base.replace(".glsl.gen.h", "").title().replace("_", "").replace(".", "") + "ShaderRD"
 
     if header_data.compute_lines:
@@ -125,8 +124,7 @@ def build_rd_header(
 
     # Intended curly brackets are doubled so f-string doesn't eat them up.
     shader_template = f"""/* WARNING, THIS FILE WAS GENERATED, DO NOT EDIT */
-#ifndef {out_file_ifdef}_RD
-#define {out_file_ifdef}_RD
+#pragma once
 
 #include "servers/rendering/renderer_rd/shader_rd.h"
 
@@ -139,8 +137,6 @@ public:
 		{body_content}
 	}}
 }};
-
-#endif
 """
 
     with open(out_file, "w", encoding="utf-8", newline="\n") as fd:
@@ -189,16 +185,13 @@ def build_raw_header(
     out_file_base = out_file.replace(".glsl.gen.h", "_shader_glsl")
     out_file_base = out_file_base[out_file_base.rfind("/") + 1 :]
     out_file_base = out_file_base[out_file_base.rfind("\\") + 1 :]
-    out_file_ifdef = out_file_base.replace(".", "_").upper()
 
     shader_template = f"""/* WARNING, THIS FILE WAS GENERATED, DO NOT EDIT */
-#ifndef {out_file_ifdef}_RAW_H
-#define {out_file_ifdef}_RAW_H
+#pragma once
 
 static const char {out_file_base}[] = {{
 {to_raw_cstring(header_data.code)}
 }};
-#endif
 """
 
     with open(out_file, "w", encoding="utf-8", newline="\n") as f:

methods.py

@@ -1447,8 +1447,6 @@ def generate_copyright_header(filename: str) -> str:
 def generated_wrapper(
     path,  # FIXME: type with `Union[str, Node, List[Node]]` when pytest conflicts are resolved
     guard: Optional[bool] = None,
-    prefix: str = "",
-    suffix: str = "",
 ) -> Generator[TextIOBase, None, None]:
     """
     Wrapper class to automatically handle copyright headers and header guards
@@ -1458,12 +1456,8 @@ def generated_wrapper(
     - `path`: The path of the file to be created. Can be passed a raw string, an
     isolated SCons target, or a full SCons target list. If a target list contains
     multiple entries, produces a warning & only creates the first entry.
-    - `guard`: Optional bool to determine if a header guard should be added. If
-    unassigned, header guards are determined by the file extension.
-    - `prefix`: Custom prefix to prepend to a header guard. Produces a warning if
-    provided a value when `guard` evaluates to `False`.
-    - `suffix`: Custom suffix to append to a header guard. Produces a warning if
-    provided a value when `guard` evaluates to `False`.
+    - `guard`: Optional bool to determine if `#pragma once` should be added. If
+    unassigned, the value is determined by file extension.
     """
 
     # Handle unfiltered SCons target[s] passed as path.
@@ -1480,35 +1474,19 @@ def generated_wrapper(
 
     path = str(path).replace("\\", "/")
     if guard is None:
-        guard = path.endswith((".h", ".hh", ".hpp", ".inc"))
-    if not guard and (prefix or suffix):
-        print_warning(f'Trying to assign header guard prefix/suffix while `guard` is disabled: "{path}".')
-
-    header_guard = ""
-    if guard:
-        if prefix:
-            prefix += "_"
-        if suffix:
-            suffix = f"_{suffix}"
-        split = path.split("/")[-1].split(".")
-        header_guard = (f"{prefix}{split[0]}{suffix}.{'.'.join(split[1:])}".upper()
-                .replace(".", "_").replace("-", "_").replace(" ", "_").replace("__", "_"))  # fmt: skip
+        guard = path.endswith((".h", ".hh", ".hpp", ".hxx", ".inc"))
 
     with open(path, "wt", encoding="utf-8", newline="\n") as file:
         file.write(generate_copyright_header(path))
         file.write("\n/* THIS FILE IS GENERATED. EDITS WILL BE LOST. */\n\n")
 
         if guard:
-            file.write(f"#ifndef {header_guard}\n")
-            file.write(f"#define {header_guard}\n\n")
+            file.write("#pragma once\n\n")
 
         with StringIO(newline="\n") as str_io:
             yield str_io
             file.write(str_io.getvalue().strip() or "/* NO CONTENT */")
 
-        if guard:
-            file.write(f"\n\n#endif // {header_guard}")
-
         file.write("\n")
 
 

misc/scripts/char_range_fetch.py

@@ -106,8 +106,7 @@ def generate_char_range_inc() -> None:
     source += f"""
 // This file was generated using the `misc/scripts/char_range_fetch.py` script.
 
-#ifndef CHAR_RANGE_INC
-#define CHAR_RANGE_INC
+#pragma once
 
 #include "core/typedefs.h"
 
@@ -125,8 +124,6 @@ struct CharRange {{
     source += make_array("lowercase_letter", lowercase_letter)
     source += make_array("unicode_letter", unicode_letter)
 
-    source += "#endif // CHAR_RANGE_INC\n"
-
     char_range_path: str = os.path.join(os.path.dirname(__file__), "../../core/string/char_range.inc")
     with open(char_range_path, "w", newline="\n") as f:
         f.write(source)

misc/scripts/header_guards.py

@@ -2,7 +2,6 @@
 # -*- coding: utf-8 -*-
 
 import sys
-from pathlib import Path
 
 if len(sys.argv) < 2:
     print("Invalid usage of header_guards.py, it should be called with a path to one or multiple files.")
@@ -13,7 +12,7 @@ invalid = []
 
 for file in sys.argv[1:]:
     header_start = -1
-    HEADER_CHECK_OFFSET = -1
+    header_end = -1
 
     with open(file.strip(), "rt", encoding="utf-8", newline="\n") as f:
         lines = f.readlines()
@@ -28,17 +27,21 @@ for file in sys.argv[1:]:
             if sline.startswith("/**********"):  # Godot header starts this way.
                 header_start = idx
             else:
-                HEADER_CHECK_OFFSET = 0  # There is no Godot header.
+                header_end = 0  # There is no Godot header.
                 break
         else:
-            if not sline.startswith("*") and not sline.startswith("/*"):  # Not in the Godot header anymore.
-                HEADER_CHECK_OFFSET = idx + 1  # The include should be two lines below the Godot header.
+            if not sline.startswith(("*", "/*")):  # Not in the Godot header anymore.
+                header_end = idx + 1  # The guard should be two lines below the Godot header.
                 break
 
-    if HEADER_CHECK_OFFSET < 0:
+    if (HEADER_CHECK_OFFSET := header_end) < 0 or HEADER_CHECK_OFFSET >= len(lines):
         invalid.append(file)
         continue
 
+    if lines[HEADER_CHECK_OFFSET].startswith("#pragma once"):
+        continue
+
+    # Might be using legacy header guards.
     HEADER_BEGIN_OFFSET = HEADER_CHECK_OFFSET + 1
     HEADER_END_OFFSET = len(lines) - 1
 
@@ -46,124 +49,35 @@ for file in sys.argv[1:]:
         invalid.append(file)
         continue
 
-    split = file.split("/")  # Already in posix-format.
-
-    prefix = ""
-    if split[0] == "modules" and split[-1] == "register_types.h":
-        prefix = f"{split[1]}_"  # Name of module.
-    elif split[0] == "platform" and (file.endswith("api/api.h") or "/export/" in file):
-        prefix = f"{split[1]}_"  # Name of platform.
-    elif file.startswith("modules/mono/utils") and "mono" not in split[-1]:
-        prefix = "MONO_"
-    elif file == "servers/rendering/storage/utilities.h":
-        prefix = "RENDERER_"
-
-    suffix = ""
-    if "dummy" in file and "dummy" not in split[-1]:
-        suffix = "_DUMMY"
-    elif "gles3" in file and "gles3" not in split[-1]:
-        suffix = "_GLES3"
-    elif "renderer_rd" in file and "rd" not in split[-1]:
-        suffix = "_RD"
-    elif split[-1] == "ustring.h":
-        suffix = "_GODOT"
-
-    name = (f"{prefix}{Path(file).stem}{suffix}{Path(file).suffix}".upper()
-            .replace(".", "_").replace("-", "_").replace(" ", "_"))  # fmt: skip
-
-    HEADER_CHECK = f"#ifndef {name}\n"
-    HEADER_BEGIN = f"#define {name}\n"
-    HEADER_END = f"#endif // {name}\n"
-
-    if (
-        lines[HEADER_CHECK_OFFSET] == HEADER_CHECK
-        and lines[HEADER_BEGIN_OFFSET] == HEADER_BEGIN
-        and lines[HEADER_END_OFFSET] == HEADER_END
-    ):
-        continue
-
-    # Guards might exist but with the wrong names.
     if (
         lines[HEADER_CHECK_OFFSET].startswith("#ifndef")
         and lines[HEADER_BEGIN_OFFSET].startswith("#define")
         and lines[HEADER_END_OFFSET].startswith("#endif")
     ):
-        lines[HEADER_CHECK_OFFSET] = HEADER_CHECK
-        lines[HEADER_BEGIN_OFFSET] = HEADER_BEGIN
-        lines[HEADER_END_OFFSET] = HEADER_END
+        lines[HEADER_CHECK_OFFSET] = "#pragma once"
+        lines[HEADER_BEGIN_OFFSET] = "\n"
+        lines.pop()
         with open(file, "wt", encoding="utf-8", newline="\n") as f:
             f.writelines(lines)
         changed.append(file)
         continue
 
-    header_check = -1
-    header_begin = -1
-    header_end = -1
-    pragma_once = -1
-    objc = False
-
-    for idx, line in enumerate(lines):
-        if line.startswith("// #import"):  # Some dummy obj-c files only have commented out import lines.
-            objc = True
-            break
-        if not line.startswith("#"):
-            continue
-        elif line.startswith("#ifndef") and header_check == -1:
-            header_check = idx
-        elif line.startswith("#define") and header_begin == -1:
-            header_begin = idx
-        elif line.startswith("#endif") and header_end == -1:
-            header_end = idx
-        elif line.startswith("#pragma once"):
-            pragma_once = idx
-            break
-        elif line.startswith("#import"):
-            objc = True
+    # Verify `#pragma once` doesn't exist at invalid location.
+    misplaced = False
+    for line in lines:
+        if line.startswith("#pragma once"):
+            misplaced = True
             break
 
-    if objc:
+    if misplaced:
+        invalid.append(file)
         continue
 
-    if pragma_once != -1:
-        lines.pop(pragma_once)
-        lines.insert(HEADER_CHECK_OFFSET, HEADER_CHECK)
-        lines.insert(HEADER_BEGIN_OFFSET, HEADER_BEGIN)
-        lines.append("\n")
-        lines.append(HEADER_END)
-        with open(file, "wt", encoding="utf-8", newline="\n") as f:
-            f.writelines(lines)
-        changed.append(file)
-        continue
-
-    if header_check == -1 and header_begin == -1 and header_end == -1:
-        # Guards simply didn't exist
-        lines.insert(HEADER_CHECK_OFFSET, HEADER_CHECK)
-        lines.insert(HEADER_BEGIN_OFFSET, HEADER_BEGIN)
-        lines.append("\n")
-        lines.append(HEADER_END)
-        with open(file, "wt", encoding="utf-8", newline="\n") as f:
-            f.writelines(lines)
-        changed.append(file)
-        continue
-
-    if header_check != -1 and header_begin != -1 and header_end != -1:
-        # All prepends "found", see if we can salvage this.
-        if header_check == header_begin - 1 and header_begin < header_end:
-            lines.pop(header_check)
-            lines.pop(header_begin - 1)
-            lines.pop(header_end - 2)
-            if lines[header_end - 3] == "\n":
-                lines.pop(header_end - 3)
-            lines.insert(HEADER_CHECK_OFFSET, HEADER_CHECK)
-            lines.insert(HEADER_BEGIN_OFFSET, HEADER_BEGIN)
-            lines.append("\n")
-            lines.append(HEADER_END)
-            with open(file, "wt", encoding="utf-8", newline="\n") as f:
-                f.writelines(lines)
-            changed.append(file)
-            continue
-
-    invalid.append(file)
+    # Assume that we're simply missing a guard entirely.
+    lines.insert(HEADER_CHECK_OFFSET, "#pragma once\n\n")
+    with open(file, "wt", encoding="utf-8", newline="\n") as f:
+        f.writelines(lines)
+    changed.append(file)
 
 if changed:
     for file in changed:

misc/scripts/ucaps_fetch.py

@@ -55,8 +55,7 @@ def generate_ucaps_fetch() -> None:
     source: str = generate_copyright_header("ucaps.h")
 
     source += f"""
-#ifndef UCAPS_H
-#define UCAPS_H
+#pragma once
 
 // This file was generated using the `misc/scripts/ucaps_fetch.py` script.
 
@@ -105,8 +104,6 @@ static int _find_lower(int ch) {
 
 \treturn ch;
 }
-
-#endif // UCAPS_H
 """
 
     ucaps_path: str = os.path.join(os.path.dirname(__file__), "../../core/string/ucaps.h")

platform/SCsub

@@ -18,7 +18,7 @@ def export_icon_builder(target, source, env):
     platform = src_path.parent.parent.stem
     with open(str(source[0]), "r") as file:
         svg = file.read()
-    with methods.generated_wrapper(target, prefix=platform) as file:
+    with methods.generated_wrapper(target) as file:
         file.write(
             f"""\
 static const char *_{platform}_{src_name}_svg = {methods.to_raw_cstring(svg)};

tests/create_test.py

@@ -78,8 +78,7 @@ def main():
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
-#ifndef TEST_{name_upper_snake_case}_H
-#define TEST_{name_upper_snake_case}_H
+#pragma once
 
 #include "tests/test_macros.h"
 
@@ -90,14 +89,11 @@ TEST_CASE("[{name_pascal_case}] Example test case") {{
 }}
 
 }} // namespace Test{name_pascal_case}
-
-#endif // TEST_{name_upper_snake_case}_H
 """.format(
                 name_snake_case=name_snake_case,
                 # Capitalize the first letter but keep capitalization for the rest of the string.
                 # This is done in case the user passes a camelCase string instead of PascalCase.
                 name_pascal_case=args.name[0].upper() + args.name[1:],
-                name_upper_snake_case=name_snake_case.upper(),
                 # The padding length depends on the test name length.
                 padding=" " * (61 - len(name_snake_case)),
             )

tests/python_build/fixtures/gles3/vertex_fragment_expected_full.glsl

@@ -1,6 +1,5 @@
 /* WARNING, THIS FILE WAS GENERATED, DO NOT EDIT */
-#ifndef VERTEX_FRAGMENT_GLSL_GEN_HGLES3_GLES3
-#define VERTEX_FRAGMENT_GLSL_GEN_HGLES3_GLES3
+#pragma once
 
 
 #include "drivers/gles3/shader_gles3.h"
@@ -70,5 +69,3 @@ void main() {
 	}
 
 };
-
-#endif

tests/python_build/fixtures/glsl/compute_expected_full.glsl

@@ -1,6 +1,5 @@
 /* WARNING, THIS FILE WAS GENERATED, DO NOT EDIT */
-#ifndef COMPUTE_SHADER_GLSL_RAW_H
-#define COMPUTE_SHADER_GLSL_RAW_H
+#pragma once
 
 static const char compute_shader_glsl[] = {
 R"<!>(#[compute]
@@ -17,4 +16,3 @@ void main() {
 }
 )<!>"
 };
-#endif

tests/python_build/fixtures/glsl/vertex_fragment_expected_full.glsl

@@ -1,6 +1,5 @@
 /* WARNING, THIS FILE WAS GENERATED, DO NOT EDIT */
-#ifndef VERTEX_FRAGMENT_SHADER_GLSL_RAW_H
-#define VERTEX_FRAGMENT_SHADER_GLSL_RAW_H
+#pragma once
 
 static const char vertex_fragment_shader_glsl[] = {
 R"<!>(#[versions]
@@ -37,4 +36,3 @@ void main() {
 }
 )<!>"
 };
-#endif

tests/python_build/fixtures/rd_glsl/compute_expected_full.glsl

@@ -1,6 +1,5 @@
 /* WARNING, THIS FILE WAS GENERATED, DO NOT EDIT */
-#ifndef COMPUTE_GLSL_GEN_H_RD
-#define COMPUTE_GLSL_GEN_H_RD
+#pragma once
 
 #include "servers/rendering/renderer_rd/shader_rd.h"
 
@@ -28,5 +27,3 @@ void main() {
 		setup(nullptr, nullptr, _compute_code, "ComputeShaderRD");
 	}
 };
-
-#endif

tests/python_build/fixtures/rd_glsl/vertex_fragment_expected_full.glsl

@@ -1,6 +1,5 @@
 /* WARNING, THIS FILE WAS GENERATED, DO NOT EDIT */
-#ifndef VERTEX_FRAGMENT_GLSL_GEN_H_RD
-#define VERTEX_FRAGMENT_GLSL_GEN_H_RD
+#pragma once
 
 #include "servers/rendering/renderer_rd/shader_rd.h"
 
@@ -42,5 +41,3 @@ void main() {
 		setup(_vertex_code, _fragment_code, nullptr, "VertexFragmentShaderRD");
 	}
 };
-
-#endif