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#!/usr/bin/env python3
import sys
import os
import subprocess
import filecmp
import shutil
from datetime import datetime
# This is a wrapper to the tools/gimp-mkenums perl script which:
# * sets a few common values;
# * updates the ${filebase}enums.c directly in the source directory in
# order for it to be versioned.
# * Create a no-op stamp-header file to be included by the resulting
# enums.c. The goal is to make sure that meson will trigger a rebuild
# of the enums.c generation before compiling, if the enums.h changed.
# See the explanation here:
# https://github.com/mesonbuild/meson/issues/10196#issuecomment-1080742592
# This is also the trick used for pdbgen.
# Arguments to this script:
# The perl binary to use.
PERL = sys.argv[1]
# Root of the source directory.
top_srcdir = sys.argv[2]
# Current source folder.
srcdir = sys.argv[3]
# Current build folder.
builddir = sys.argv[4]
# Base of the generated enums.c file name.
filebase = sys.argv[5]
# Includes before #include "${filebase}enums.h"
preincludes = sys.argv[6]
# Includes after #include "${filebase}enums.h"
postincludes = sys.argv[7]
# Value for --dtail option if the default doesn't fit.
dtail = sys.argv[8] if len(sys.argv) >= 9 else None
if not dtail:
dtail = " { 0, NULL, NULL }\n };\n\n static GType type = 0;\n\n if (G_UNLIKELY (! type))\n {\n type = g_@type@_register_static (\"@EnumName@\", values);\n gimp_type_set_translation_context (type, \"@enumnick@\");\n gimp_@type@_set_value_descriptions (type, descs);\n }\n\n return type;\n}\n"
args = [
PERL, os.path.join(top_srcdir, 'tools', 'gimp-mkenums'),
'--fhead', f'#include "stamp-{filebase}enums.h"\n' f'#include "config.h"\n' f'{preincludes}' f'#include "{filebase}enums.h"\n' f'{postincludes}',
'--fprod', '\n/* enumerations from "@basename@" */',
'--vhead', 'GType\n' '@enum_name@_get_type (void)\n' '{\n' ' static const G@Type@Value values[] =\n' ' {',
'--vprod', ' { @VALUENAME@, "@VALUENAME@", "@valuenick@" },',
'--vtail', ' { 0, NULL, NULL }\n };\n',
'--dhead', ' static const Gimp@Type@Desc descs[] =\n {',
'--dprod', ' { @VALUENAME@, @valuedesc@, @valuehelp@ },' '@if (\'@valueabbrev@\' ne \'NULL\')@\n' ' /* Translators: this is an abbreviated version of @valueudesc@.\n' ' Keep it short. */\n' ' { @VALUENAME@, @valueabbrev@, NULL },@endif@',
'--dtail', dtail,
os.path.join(f"{filebase}enums.h")
]
tmp_enums_c = os.path.join(builddir, f"{filebase}enums-tmp.c")
with open(tmp_enums_c, 'w') as f:
subprocess.run(args, check=True, stdout=f, text=True, cwd=srcdir)
target_enums_c = os.path.join(srcdir, f"{filebase}enums.c")
if not filecmp.cmp(tmp_enums_c, target_enums_c, shallow=False):
shutil.copy(tmp_enums_c, target_enums_c)
else:
try:
os.utime(target_enums_c, None)
except OSError:
pass
with open(os.path.join(builddir, f"stamp-{filebase}enums.h"), 'w') as f:
f.write(f"/* Generated on {datetime.now().strftime('%a %b %d %H:%M:%S %Z %Y')}. */\n")
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