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rust-qt-binding-generator
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Only write if the file changed

master
Jos van den Oever 2017-08-11 18:25:51 +02:00
parent 12e6eaceb8
commit b7cd97a4f8
2 changed files with 60 additions and 40 deletions
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97
rust_qt_binding_generator/rust_qt_binding_generator.cpp
View File

@ -41,6 +41,7 @@ struct Configuration {
QString interfaceModule;
QString implementationModule;
QList<Object> objects;
bool overwriteImplementation;
};
Property
@ -83,7 +84,7 @@ Configuration
parseConfiguration(const QString& path) {
QFile configurationFile(path);
const QDir base = QFileInfo(configurationFile).dir();
if (!configurationFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
if (!configurationFile.open(QIODevice::ReadOnly)) {
err << QCoreApplication::translate("main",
"Cannot read %1.\n").arg(configurationFile.fileName());
err.flush();
@ -208,7 +209,7 @@ QVariant %1::data(const QModelIndex &index, int role) const
QVariant v;
switch ((%1Role)role) {
)").arg(o.name, lcname);
for (auto role: o.roles) {
cpp << QString(" case %1Role%2:\n").arg(o.name, role.name);
cpp << QString(" %1_data_%2(d, index.row(), &v, set_qvariant);\n")
@ -352,15 +353,47 @@ void writeCppObject(QTextStream& cpp, const Object& o) {
}
}
void writeHeader(const Configuration& conf) {
QFile hFile(conf.hFile.absoluteFilePath());
if (!hFile.open(QIODevice::WriteOnly | QIODevice::Text)) {
err << QCoreApplication::translate("main",
"Cannot write %1.\n").arg(hFile.fileName());
err.flush();
exit(1);
// Only write a file if it is different
class DifferentFileWriter {
public:
const QString path;
QByteArray buffer;
bool overwrite;
DifferentFileWriter(const QString& p, bool o = true) :path(p), overwrite(o)
{
}
QTextStream h(&hFile);
~DifferentFileWriter() {
const QByteArray old = read();
// write if file does not exists
if ((!old.isNull() && overwrite) || old == buffer) {
return;
}
write();
}
QByteArray read() const {
QByteArray content;
QFile file(path);
if (file.open(QIODevice::ReadOnly)) {
content = file.readAll();
}
return content;
}
void write() const {
QFile file(path);
if (!file.open(QIODevice::WriteOnly)) {
err << QCoreApplication::translate("main",
"Cannot write %1.\n").arg(file.fileName());
err.flush();
exit(1);
}
file.write(buffer);
file.close();
}
};
void writeHeader(const Configuration& conf) {
DifferentFileWriter w(conf.hFile.absoluteFilePath());
QTextStream h(&w.buffer);
const QString guard(conf.hFile.fileName().replace('.', '_').toUpper());
h << QString(R"(/* generated by rust_qt_binding_generator */
#ifndef %1
@ -379,14 +412,8 @@ void writeHeader(const Configuration& conf) {
}
void writeCpp(const Configuration& conf) {
QFile cppFile(conf.cppFile.absoluteFilePath());
if (!cppFile.open(QIODevice::WriteOnly | QIODevice::Text)) {
err << QCoreApplication::translate("main",
"Cannot write %1.\n").arg(cppFile.fileName());
err.flush();
exit(1);
}
QTextStream cpp(&cppFile);
DifferentFileWriter w(conf.cppFile.absoluteFilePath());
QTextStream cpp(&w.buffer);
cpp << QString(R"(/* generated by rust_qt_binding_generator */
#include "%1"
#include <QModelIndex>
@ -737,14 +764,8 @@ QString rustFile(const QDir rustdir, const QString& module) {
}
void writeRustInterface(const Configuration& conf) {
QFile file(rustFile(conf.rustdir, conf.interfaceModule));
if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
err << QCoreApplication::translate("main",
"Cannot write %1.\n").arg(file.fileName());
err.flush();
exit(1);
}
QTextStream r(&file);
DifferentFileWriter w(rustFile(conf.rustdir, conf.interfaceModule));
QTextStream r(&w.buffer);
r << QString(R"(
#![allow(unknown_lints)]
#![allow(mutex_atomic, needless_pass_by_value)]
@ -822,17 +843,9 @@ void writeRustImplementationObject(QTextStream& r, const Object& o) {
}
void writeRustImplementation(const Configuration& conf) {
QFile file(rustFile(conf.rustdir, conf.implementationModule));
if (file.exists()) {
return;
}
if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) {
err << QCoreApplication::translate("main",
"Cannot write %1.\n").arg(file.fileName());
err.flush();
exit(1);
}
QTextStream r(&file);
DifferentFileWriter w(rustFile(conf.rustdir, conf.implementationModule),
conf.overwriteImplementation);
QTextStream r(&w.buffer);
r << QString(R"(use libc::c_int;
use types::*;
use %1::*;
@ -856,6 +869,13 @@ int main(int argc, char *argv[]) {
parser.addPositionalArgument("configuration",
QCoreApplication::translate("main", "Configuration file"));
// A boolean option (--overwrite-implementation)
QCommandLineOption overwriteOption(QStringList()
<< "overwrite-implementation",
QCoreApplication::translate("main",
"Overwrite existing implementation."));
parser.addOption(overwriteOption);
parser.process(app);
const QStringList args = parser.positionalArguments();
@ -866,7 +886,8 @@ int main(int argc, char *argv[]) {
}
const QString configurationFile(args.at(0));
const Configuration configuration = parseConfiguration(configurationFile);
Configuration configuration = parseConfiguration(configurationFile);
configuration.overwriteImplementation = parser.isSet(overwriteOption);
writeHeader(configuration);
writeCpp(configuration);

3
tests/CMakeLists.txt
View File

@ -2,8 +2,7 @@ enable_testing()
add_custom_command(
OUTPUT "${CMAKE_CURRENT_SOURCE_DIR}/rust_object/src/interface.rs"
COMMAND "${CMAKE_COMMAND}" -E remove "${CMAKE_CURRENT_SOURCE_DIR}/rust_object/src/implementation.rs"
COMMAND ${CMAKE_BINARY_DIR}/rust_qt_binding_generator/rust_qt_binding_generator "${CMAKE_CURRENT_SOURCE_DIR}/test_object.json"
COMMAND ${CMAKE_BINARY_DIR}/rust_qt_binding_generator/rust_qt_binding_generator --overwrite-implementation "${CMAKE_CURRENT_SOURCE_DIR}/test_object.json"
DEPENDS rust_qt_binding_generator test_object.json
)