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fuzz: hack around unknown module structure

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Matthew Lugg 2025-11-19 13:05:03 +00:00
parent 010dcd6a9b
commit e1fa4011fb
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1 changed files with 15 additions and 14 deletions
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29
lib/build-web/fuzz.zig
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@ -228,20 +228,21 @@ fn unpackSourcesInner(tar_bytes: []u8) !void {
if (std.mem.endsWith(u8, tar_file.name, ".zig")) {
log.debug("found file: '{s}'", .{tar_file.name});
const file_name = try gpa.dupe(u8, tar_file.name);
if (std.mem.indexOfScalar(u8, file_name, '/')) |pkg_name_end| {
const pkg_name = file_name[0..pkg_name_end];
const gop = try Walk.modules.getOrPut(gpa, pkg_name);
const file: Walk.File.Index = @enumFromInt(Walk.files.entries.len);
if (!gop.found_existing or
std.mem.eql(u8, file_name[pkg_name_end..], "/root.zig") or
std.mem.eql(u8, file_name[pkg_name_end + 1 .. file_name.len - ".zig".len], pkg_name))
{
gop.value_ptr.* = file;
}
const file_bytes = tar_reader.take(@intCast(tar_file.size)) catch unreachable;
it.unread_file_bytes = 0; // we have read the whole thing
assert(file == try Walk.add_file(file_name, file_bytes));
}
// This is a hack to guess modules from the tar file contents. To handle modules
// properly, the build system will need to change the structure here to have one
// directory per module. This in turn requires compiler enhancements to allow
// the build system to actually discover the required information.
const mod_name, const is_module_root = p: {
if (std.mem.find(u8, file_name, "std/")) |i| break :p .{ "std", std.mem.eql(u8, file_name[i + 4 ..], "std.zig") };
if (std.mem.endsWith(u8, file_name, "/builtin.zig")) break :p .{ "builtin", true };
break :p .{ "root", std.mem.endsWith(u8, file_name, "/root.zig") };
};
const gop = try Walk.modules.getOrPut(gpa, mod_name);
const file: Walk.File.Index = @enumFromInt(Walk.files.entries.len);
if (!gop.found_existing or is_module_root) gop.value_ptr.* = file;
const file_bytes = tar_reader.take(@intCast(tar_file.size)) catch unreachable;
it.unread_file_bytes = 0; // we have read the whole thing
assert(file == try Walk.add_file(file_name, file_bytes));
} else {
log.warn("skipping: '{s}' - the tar creation should have done that", .{tar_file.name});
}