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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "File.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
namespace clang {
namespace doc {
llvm::Error copyFile(llvm::StringRef FilePath, llvm::StringRef OutDirectory) {
llvm::SmallString<128> PathWrite;
llvm::sys::path::native(OutDirectory, PathWrite);
llvm::sys::path::append(PathWrite, llvm::sys::path::filename(FilePath));
llvm::SmallString<128> PathRead;
llvm::sys::path::native(FilePath, PathRead);
std::error_code FileErr = llvm::sys::fs::copy_file(PathRead, PathWrite);
if (FileErr) {
return llvm::createStringError(llvm::inconvertibleErrorCode(),
"error creating file " +
llvm::sys::path::filename(FilePath) +
": " + FileErr.message() + "\n");
}
return llvm::Error::success();
}
llvm::SmallString<128> computeRelativePath(llvm::StringRef Destination,
llvm::StringRef Origin) {
// If Origin is empty, the relative path to the Destination is its complete
// path.
if (Origin.empty())
return Destination;
// The relative path is an empty path if both directories are the same.
if (Destination == Origin)
return {};
// These iterators iterate through each of their parent directories
llvm::sys::path::const_iterator FileI = llvm::sys::path::begin(Destination);
llvm::sys::path::const_iterator FileE = llvm::sys::path::end(Destination);
llvm::sys::path::const_iterator DirI = llvm::sys::path::begin(Origin);
llvm::sys::path::const_iterator DirE = llvm::sys::path::end(Origin);
// Advance both iterators until the paths differ. Example:
// Destination = A/B/C/D
// Origin = A/B/E/F
// FileI will point to C and DirI to E. The directories behind them is the
// directory they share (A/B).
while (FileI != FileE && DirI != DirE && *FileI == *DirI) {
++FileI;
++DirI;
}
llvm::SmallString<128> Result; // This will hold the resulting path.
// Result has to go up one directory for each of the remaining directories in
// Origin
while (DirI != DirE) {
llvm::sys::path::append(Result, "..");
++DirI;
}
// Result has to append each of the remaining directories in Destination
while (FileI != FileE) {
llvm::sys::path::append(Result, *FileI);
++FileI;
}
return Result;
}
} // namespace doc
} // namespace clang
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