std.tar: handle tar files with symbolic links #16678
Description
Zig Version
0.11.0-dev.4404+4f6013bf5
Steps to Reproduce and Observed Behavior
Use any data.tar.gz below that contains a symbolic link.
You'll get a TarUnsupportedFileType which is explicitly returned from std.tar if it seems a symlink.
const std = @import("std");
/// USE BAD TAR.GZ HERE
const data = @embedFile("data.tar.gz");
pub fn main() !void {
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer _ = gpa.deinit();
const alloc = gpa.allocator();
var out_dir = try std.fs.cwd().openDir("test-out", .{});
var stream = std.io.fixedBufferStream(data);
var decompress = try std.compress.gzip.decompress(alloc, stream.reader());
defer decompress.deinit();
try std.tar.pipeToFileSystem(out_dir, decompress.reader(), .{
.strip_components = 1,
.mode_mode = .ignore,
});
}Expected Behavior
This should work. A lot of source archives for the Zig package manager contain symbolic links. Major source archives that I use that have symbolic links:
- libxml2
- harfbuzz
This will also impair #16643 (not block) because downloading source archives for me will be a big use case.