CMake/Source/cmWriteFileCommand.cxx
Sebastian Holtermann 9b334397f5 Source sweep: Use cmStrCat for string concatenation
This patch is generated by a python script that uses regular expressions to
search for string concatenation patterns of the kind

```
std::string str = <ARG0>;
str += <ARG1>;
str += <ARG2>;
...
```

and replaces them with a single `cmStrCat` call

```
std::string str = cmStrCat(<ARG0>, <ARG1>, <ARG2>, ...);
```

If any `<ARGX>` is itself a concatenated string of the kind

```
a + b + c + ...;
```

then `<ARGX>` is split into multiple arguments for the `cmStrCat` call.

If there's a sequence of literals in the `<ARGX>`, then all literals in the
sequence are concatenated and merged into a single literal argument for
the `cmStrCat` call.

Single character strings are converted to single char arguments for
the `cmStrCat` call.

`std::to_string(...)` wrappings are removed from `cmStrCat` arguments,
because it supports numeric types as well as string types.

`arg.substr(x)` arguments to `cmStrCat` are replaced with
`cm::string_view(arg).substr(x)`
2019-08-22 16:38:10 +02:00

82 lines
2.2 KiB
C++

/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmWriteFileCommand.h"
#include "cmsys/FStream.hxx"
#include "cmExecutionStatus.h"
#include "cmMakefile.h"
#include "cmStringAlgorithms.h"
#include "cmSystemTools.h"
#include "cm_sys_stat.h"
// cmLibraryCommand
bool cmWriteFileCommand(std::vector<std::string> const& args,
cmExecutionStatus& status)
{
if (args.size() < 2) {
status.SetError("called with incorrect number of arguments");
return false;
}
std::string message;
std::vector<std::string>::const_iterator i = args.begin();
std::string const& fileName = *i;
bool overwrite = true;
i++;
for (; i != args.end(); ++i) {
if (*i == "APPEND") {
overwrite = false;
} else {
message += *i;
}
}
if (!status.GetMakefile().CanIWriteThisFile(fileName)) {
std::string e =
"attempted to write a file: " + fileName + " into a source directory.";
status.SetError(e);
cmSystemTools::SetFatalErrorOccured();
return false;
}
std::string dir = cmSystemTools::GetFilenamePath(fileName);
cmSystemTools::MakeDirectory(dir);
mode_t mode = 0;
bool writable = false;
// Set permissions to writable
if (cmSystemTools::GetPermissions(fileName.c_str(), mode)) {
#if defined(_MSC_VER) || defined(__MINGW32__)
writable = (mode & S_IWRITE) != 0;
mode_t newMode = mode | S_IWRITE;
#else
writable = mode & S_IWUSR;
mode_t newMode = mode | S_IWUSR | S_IWGRP;
#endif
if (!writable) {
cmSystemTools::SetPermissions(fileName.c_str(), newMode);
}
}
// If GetPermissions fails, pretend like it is ok. File open will fail if
// the file is not writable
cmsys::ofstream file(fileName.c_str(),
overwrite ? std::ios::out : std::ios::app);
if (!file) {
std::string error =
cmStrCat("Internal CMake error when trying to open file: ", fileName,
" for writing.");
status.SetError(error);
return false;
}
file << message << std::endl;
file.close();
if (mode && !writable) {
cmSystemTools::SetPermissions(fileName.c_str(), mode);
}
return true;
}