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#include "fetchers.hh"
#include "download.hh"
#include "globals.hh"
#include "parse.hh"
#include "store-api.hh"
namespace nix::fetchers {
struct TarballInput : Input
{
ParsedURL url;
std::optional<Hash> hash;
TarballInput(const ParsedURL & url) : url(url)
{ }
std::string type() const override { return "tarball"; }
bool operator ==(const Input & other) const override
{
auto other2 = dynamic_cast<const TarballInput *>(&other);
return
other2
&& to_string() == other2->to_string()
&& hash == other2->hash;
}
bool isImmutable() const override
{
return hash || narHash;
}
std::string to_string() const override
{
auto url2(url);
// NAR hashes are preferred over file hashes since tar/zip files
// don't have a canonical representation.
if (narHash)
url2.query.insert_or_assign("narHash", narHash->to_string(SRI));
else if (hash)
url2.query.insert_or_assign("hash", hash->to_string(SRI));
return url2.to_string();
}
Attrs toAttrsInternal() const override
{
Attrs attrs;
attrs.emplace("url", url.to_string());
if (narHash)
attrs.emplace("narHash", hash->to_string(SRI));
else if (hash)
attrs.emplace("hash", hash->to_string(SRI));
return attrs;
}
std::pair<Tree, std::shared_ptr<const Input>> fetchTreeInternal(nix::ref<Store> store) const override
{
CachedDownloadRequest request(url.to_string());
request.unpack = true;
request.getLastModified = true;
request.name = "source";
auto res = getDownloader()->downloadCached(store, request);
auto input = std::make_shared<TarballInput>(*this);
auto storePath = store->parseStorePath(res.storePath);
input->narHash = store->queryPathInfo(storePath)->narHash;
return {
Tree {
.actualPath = res.path,
.storePath = std::move(storePath),
.lastModified = *res.lastModified
},
input
};
}
};
struct TarballInputScheme : InputScheme
{
std::unique_ptr<Input> inputFromURL(const ParsedURL & url) override
{
if (url.scheme != "file" && url.scheme != "http" && url.scheme != "https") return nullptr;
if (!hasSuffix(url.path, ".zip")
&& !hasSuffix(url.path, ".tar")
&& !hasSuffix(url.path, ".tar.gz")
&& !hasSuffix(url.path, ".tar.xz")
&& !hasSuffix(url.path, ".tar.bz2"))
return nullptr;
auto input = std::make_unique<TarballInput>(url);
auto hash = url.query.find("hash");
if (hash != url.query.end())
// FIXME: require SRI hash.
input->hash = Hash(hash->second);
auto narHash = url.query.find("narHash");
if (narHash != url.query.end())
// FIXME: require SRI hash.
input->narHash = Hash(narHash->second);
return input;
}
std::unique_ptr<Input> inputFromAttrs(const Input::Attrs & attrs) override
{
if (maybeGetStrAttr(attrs, "type") != "tarball") return {};
for (auto & [name, value] : attrs)
if (name != "type" && name != "url" && name != "hash" && name != "narHash")
throw Error("unsupported tarball input attribute '%s'", name);
auto input = std::make_unique<TarballInput>(parseURL(getStrAttr(attrs, "url")));
if (auto hash = maybeGetStrAttr(attrs, "hash"))
// FIXME: require SRI hash.
input->hash = Hash(*hash);
if (auto narHash = maybeGetStrAttr(attrs, "narHash"))
// FIXME: require SRI hash.
input->narHash = Hash(*narHash);
return input;
}
};
static auto r1 = OnStartup([] { registerInputScheme(std::make_unique<TarballInputScheme>()); });
}
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