mirror of
https://github.com/mirkobrombin/raven.git
synced 2026-11-03 21:46:32 +00:00
64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
#include "prefix.h"
|
|
|
|
#include <cstdlib>
|
|
#include <stdexcept>
|
|
#include <string>
|
|
|
|
namespace raven {
|
|
|
|
NativePrefix::NativePrefix(std::filesystem::path root) : directory(std::move(root))
|
|
{
|
|
if (directory.empty())
|
|
throw std::runtime_error("native prefix requires a directory");
|
|
// The folders every Windows installation has, so that programs can put files in the places they expect.
|
|
for (const char *folder : {"windows", "windows/system32", "Program Files", "Program Files (x86)", "ProgramData/Microsoft/Windows/Start Menu/Programs",
|
|
"Users/Public/Desktop", "Users/Public/Documents"})
|
|
std::filesystem::create_directories(directory / "drive_c" / folder);
|
|
}
|
|
|
|
NativePrefix NativePrefix::from_environment()
|
|
{
|
|
if (const char *configured = std::getenv("RAVEN_PREFIX"); configured && *configured)
|
|
return NativePrefix(configured);
|
|
const char *home = std::getenv("HOME");
|
|
if (!home || !*home)
|
|
throw std::runtime_error("native prefix needs RAVEN_PREFIX or HOME");
|
|
return NativePrefix(std::filesystem::path(home) / ".local" / "share" / "raven" / "default");
|
|
}
|
|
|
|
std::optional<std::filesystem::path> NativePrefix::resolve(std::string_view windows_path) const
|
|
{
|
|
std::string text(windows_path);
|
|
for (auto &character : text)
|
|
if (character == '\\')
|
|
character = '/';
|
|
std::filesystem::path base = directory / "drive_c" / "windows";
|
|
if (text.size() >= 2 && text[1] == ':') {
|
|
const char drive = char(text[0] | 0x20);
|
|
if (drive < 'a' || drive > 'z')
|
|
return std::nullopt;
|
|
base = directory / (std::string("drive_") + drive);
|
|
text.erase(0, 2);
|
|
}
|
|
if (!text.empty() && text[0] == '/')
|
|
text.erase(0, 1);
|
|
if (text.empty())
|
|
return std::nullopt;
|
|
std::filesystem::path result = base;
|
|
size_t start = 0;
|
|
while (start <= text.size()) {
|
|
const size_t end = text.find('/', start);
|
|
const auto part = text.substr(start, end == text.npos ? text.npos : end - start);
|
|
if (part == "..")
|
|
return std::nullopt;
|
|
if (!part.empty() && part != ".")
|
|
result /= part;
|
|
if (end == text.npos)
|
|
break;
|
|
start = end + 1;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
}
|