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Merge pull request #91100 from bruvzg/x_finks

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Add symlink API support for Windows, expose symlink methods.
This commit is contained in:
Rémi Verschelde 2024-04-29 13:00:37 +02:00
commit 32070144af
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GPG Key ID: C3336907360768E1
4 changed files with 93 additions and 3 deletions
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4
core/io/dir_access.cpp
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@ -582,6 +582,10 @@ void DirAccess::_bind_methods() {
ClassDB::bind_method(D_METHOD("remove", "path"), &DirAccess::remove);
ClassDB::bind_static_method("DirAccess", D_METHOD("remove_absolute", "path"), &DirAccess::remove_absolute);
ClassDB::bind_method(D_METHOD("is_link", "path"), &DirAccess::is_link);
ClassDB::bind_method(D_METHOD("read_link", "path"), &DirAccess::read_link);
ClassDB::bind_method(D_METHOD("create_link", "source", "target"), &DirAccess::create_link);
ClassDB::bind_method(D_METHOD("set_include_navigational", "enable"), &DirAccess::set_include_navigational);
ClassDB::bind_method(D_METHOD("get_include_navigational"), &DirAccess::get_include_navigational);
ClassDB::bind_method(D_METHOD("set_include_hidden", "enable"), &DirAccess::set_include_hidden);

26
doc/classes/DirAccess.xml
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@ -94,6 +94,16 @@
Static version of [method copy]. Supports only absolute paths.
</description>
</method>
<method name="create_link">
<return type="int" enum="Error" />
<param index="0" name="source" type="String" />
<param index="1" name="target" type="String" />
<description>
Creates symbolic link between files or folders.
[b]Note:[/b] On Windows, this method works only if the application is running with elevated privileges or Developer Mode is enabled.
[b]Note:[/b] This method is implemented on macOS, Linux, and Windows.
</description>
</method>
<method name="current_is_dir" qualifiers="const">
<return type="bool" />
<description>
@ -212,6 +222,14 @@
[b]Note:[/b] This method is implemented on macOS, Linux (for EXT4 and F2FS filesystems only) and Windows. On other platforms, it always returns [code]true[/code].
</description>
</method>
<method name="is_link">
<return type="bool" />
<param index="0" name="path" type="String" />
<description>
Returns [code]true[/code] if the file or directory is a symbolic link, directory junction, or other reparse point.
[b]Note:[/b] This method is implemented on macOS, Linux, and Windows.
</description>
</method>
<method name="list_dir_begin">
<return type="int" enum="Error" />
<description>
@ -264,6 +282,14 @@
Returns [code]null[/code] if opening the directory failed. You can use [method get_open_error] to check the error that occurred.
</description>
</method>
<method name="read_link">
<return type="String" />
<param index="0" name="path" type="String" />
<description>
Returns target of the symbolic link.
[b]Note:[/b] This method is implemented on macOS, Linux, and Windows.
</description>
</method>
<method name="remove">
<return type="int" enum="Error" />
<param index="0" name="path" type="String" />

60
drivers/windows/dir_access_windows.cpp
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@ -396,6 +396,66 @@ bool DirAccessWindows::is_case_sensitive(const String &p_path) const {
}
}
bool DirAccessWindows::is_link(String p_file) {
String f = p_file;
if (!f.is_absolute_path()) {
f = get_current_dir().path_join(f);
}
f = fix_path(f);
DWORD attr = GetFileAttributesW((LPCWSTR)(f.utf16().get_data()));
if (attr == INVALID_FILE_ATTRIBUTES) {
return false;
}
return (attr & FILE_ATTRIBUTE_REPARSE_POINT);
}
String DirAccessWindows::read_link(String p_file) {
String f = p_file;
if (!f.is_absolute_path()) {
f = get_current_dir().path_join(f);
}
f = fix_path(f);
HANDLE hfile = CreateFileW((LPCWSTR)(f.utf16().get_data()), GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, nullptr);
if (hfile == INVALID_HANDLE_VALUE) {
return f;
}
DWORD ret = GetFinalPathNameByHandleW(hfile, nullptr, 0, VOLUME_NAME_DOS | FILE_NAME_NORMALIZED);
if (ret == 0) {
return f;
}
Char16String cs;
cs.resize(ret + 1);
GetFinalPathNameByHandleW(hfile, (LPWSTR)cs.ptrw(), ret, VOLUME_NAME_DOS | FILE_NAME_NORMALIZED);
CloseHandle(hfile);
return String::utf16((const char16_t *)cs.ptr(), ret).trim_prefix(R"(\\?\)");
}
Error DirAccessWindows::create_link(String p_source, String p_target) {
if (p_target.is_relative_path()) {
p_target = get_current_dir().path_join(p_target);
}
p_source = fix_path(p_source);
p_target = fix_path(p_target);
DWORD file_attr = GetFileAttributesW((LPCWSTR)(p_source.utf16().get_data()));
bool is_dir = (file_attr & FILE_ATTRIBUTE_DIRECTORY);
DWORD flags = ((is_dir) ? SYMBOLIC_LINK_FLAG_DIRECTORY : 0) | SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE;
if (CreateSymbolicLinkW((LPCWSTR)p_target.utf16().get_data(), (LPCWSTR)p_source.utf16().get_data(), flags) != 0) {
return OK;
} else {
return FAILED;
}
}
DirAccessWindows::DirAccessWindows() {
p = memnew(DirAccessWindowsPrivate);
p->h = INVALID_HANDLE_VALUE;

6
drivers/windows/dir_access_windows.h
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@ -77,9 +77,9 @@ public:
virtual Error rename(String p_path, String p_new_path) override;
virtual Error remove(String p_path) override;
virtual bool is_link(String p_file) override { return false; };
virtual String read_link(String p_file) override { return p_file; };
virtual Error create_link(String p_source, String p_target) override { return FAILED; };
virtual bool is_link(String p_file) override;
virtual String read_link(String p_file) override;
virtual Error create_link(String p_source, String p_target) override;
uint64_t get_space_left() override;