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Add a new script to compile resources.
- No more dependency to reswrap binary (everything is done in python) - Resource strings can be directly accessed. As side effect, it add a check at compilation if the resource is declared and compiled in the binary. - The resource content can be overwritten at runtime with a env variable. There is also few clean in the static as some files shoul be in the tools directory. The compile_resource script is install to let other project use it.
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,164 @@ | ||
#!/usr/bin/env python3 | ||
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import argparse | ||
import os.path | ||
import re | ||
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def full_identifier(filename): | ||
parts = os.path.normpath(filename).split(os.sep) | ||
parts = [to_identifier(part) for part in parts] | ||
print(filename, parts) | ||
return parts | ||
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def to_identifier(name): | ||
ident = re.sub(r'[^0-9a-zA-Z]', '_', name) | ||
if ident[0].isnumeric(): | ||
return "_"+ident | ||
return ident | ||
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resource_impl_template = """ | ||
static const unsigned char {data_identifier}[] = {{ | ||
{resource_content} | ||
}}; | ||
namespace RESOURCE {{ | ||
{namespaces_open} | ||
const std::string {identifier} = init_resource("{env_identifier}", {data_identifier}, {resource_len}); | ||
{namespaces_close} | ||
}} | ||
""" | ||
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resource_getter_template = """ | ||
if (name == "{common_name}") | ||
return RESOURCE::{identifier}; | ||
""" | ||
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resource_decl_template = """{namespaces_open} | ||
extern const std::string {identifier}; | ||
{namespaces_close}""" | ||
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class Resource: | ||
def __init__(self, base_dir, filename): | ||
filename = filename.strip() | ||
self.filename = filename | ||
self.identifier = full_identifier(filename) | ||
with open(os.path.join(base_dir, filename), 'rb') as f: | ||
self.data = f.read() | ||
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def dump_impl(self): | ||
nb_row = len(self.data)//16 + (1 if len(self.data) % 16 else 0) | ||
sliced = (self.data[i*16:(i+1)*16] for i in range(nb_row)) | ||
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return resource_impl_template.format( | ||
data_identifier="_".join([""]+self.identifier), | ||
resource_content=",\n ".join(", ".join("{:#04x}".format(i) for i in r) for r in sliced), | ||
resource_len=len(self.data), | ||
namespaces_open=" ".join("namespace {} {{".format(id) for id in self.identifier[:-1]), | ||
namespaces_close=" ".join(["}"]*(len(self.identifier)-1)), | ||
identifier=self.identifier[-1], | ||
env_identifier="RES_"+"_".join(self.identifier)+"_PATH" | ||
) | ||
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def dump_getter(self): | ||
return resource_getter_template.format( | ||
common_name=self.filename, | ||
identifier="::".join(self.identifier) | ||
) | ||
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def dump_decl(self): | ||
return resource_decl_template.format( | ||
namespaces_open=" ".join("namespace {} {{".format(id) for id in self.identifier[:-1]), | ||
namespaces_close=" ".join(["}"]*(len(self.identifier)-1)), | ||
identifier=self.identifier[-1] | ||
) | ||
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master_c_template = """//This file is automaically generated. Do not modify it. | ||
#include <stdlib.h> | ||
#include <fstream> | ||
#include <exception> | ||
#include "{basename}" | ||
class ResourceNotFound : public std::runtime_error {{ | ||
public: | ||
ResourceNotFound(const std::string& what_arg): | ||
std::runtime_error(what_arg) | ||
{{ }}; | ||
}}; | ||
static std::string init_resource(const char* name, const unsigned char* content, int len) | ||
{{ | ||
char * resPath = getenv(name); | ||
if (NULL == resPath) | ||
return std::string(reinterpret_cast<const char*>(content), len); | ||
std::ifstream ifs(resPath); | ||
if (!ifs.good()) | ||
return std::string(reinterpret_cast<const char*>(content), len); | ||
return std::string( (std::istreambuf_iterator<char>(ifs)), | ||
(std::istreambuf_iterator<char>() )); | ||
}} | ||
const std::string& getResource(const std::string& name) {{ | ||
{RESOURCES_GETTER} | ||
throw ResourceNotFound("Resource not found."); | ||
}} | ||
{RESOURCES} | ||
""" | ||
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def gen_c_file(resources, basename): | ||
return master_c_template.format( | ||
RESOURCES="\n\n".join(r.dump_impl() for r in resources), | ||
RESOURCES_GETTER="\n\n".join(r.dump_getter() for r in resources), | ||
basename=basename | ||
) | ||
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master_h_template = """//This file is automaically generated. Do not modify it. | ||
#ifndef KIWIX_{BASENAME} | ||
#define KIWIX_{BASENAME} | ||
#include <string> | ||
namespace RESOURCE {{ | ||
{RESOURCES} | ||
}}; | ||
const std::string& getResource(const std::string& name); | ||
#endif // KIWIX_{BASENAME} | ||
""" | ||
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def gen_h_file(resources, basename): | ||
return master_h_template.format( | ||
RESOURCES="\n ".join(r.dump_decl() for r in resources), | ||
BASENAME=basename.upper() | ||
) | ||
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if __name__ == "__main__": | ||
parser = argparse.ArgumentParser() | ||
parser.add_argument('--cxxfile', | ||
help='The Cpp file name to generate') | ||
parser.add_argument('--hfile', | ||
help='The h file name to generate') | ||
parser.add_argument('resource_file', | ||
help='The list of resources to compile.') | ||
args = parser.parse_args() | ||
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base_dir = os.path.dirname(os.path.realpath(args.resource_file)) | ||
with open(args.resource_file, 'r') as f: | ||
resources = [Resource(base_dir, filename) for filename in f.readlines()] | ||
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h_identifier = to_identifier(os.path.basename(args.hfile)) | ||
with open(args.hfile, 'w') as f: | ||
f.write(gen_h_file(resources, h_identifier)) | ||
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with open(args.cxxfile, 'w') as f: | ||
f.write(gen_c_file(resources, os.path.basename(args.hfile))) | ||
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,4 @@ | ||
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res_compiler = find_program('compile_resources.py') | ||
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install_data(res_compiler.path(), install_dir:get_option('bindir')) |
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