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#include "libstore/nar-info.hh"
#include <absl/strings/numbers.h>
#include <absl/strings/str_split.h>
#include "libstore/globals.hh"
namespace nix {
NarInfo::NarInfo(const Store& store, const std::string& s,
const std::string& whence) {
auto corrupt = [&]() {
throw Error(format("NAR info file '%1%' is corrupt") % whence);
};
auto parseHashField = [&](const std::string& s) {
auto hash_ = Hash::deserialize(s);
if (hash_.ok()) {
return *hash_;
} else {
// TODO(#statusor): return an actual error
corrupt();
return Hash();
}
};
size_t pos = 0;
while (pos < s.size()) {
size_t colon = s.find(':', pos);
if (colon == std::string::npos) {
corrupt();
}
std::string name(s, pos, colon - pos);
size_t eol = s.find('\n', colon + 2);
if (eol == std::string::npos) {
corrupt();
}
std::string value(s, colon + 2, eol - colon - 2);
if (name == "StorePath") {
if (!store.isStorePath(value)) {
corrupt();
}
path = value;
} else if (name == "URL") {
url = value;
} else if (name == "Compression") {
compression = value;
} else if (name == "FileHash") {
fileHash = parseHashField(value);
} else if (name == "FileSize") {
if (!absl::SimpleAtoi(value, &fileSize)) {
corrupt();
}
} else if (name == "NarHash") {
narHash = parseHashField(value);
} else if (name == "NarSize") {
if (!absl::SimpleAtoi(value, &narSize)) {
corrupt();
}
} else if (name == "References") {
std::vector<std::string> refs = absl::StrSplit(value, absl::ByChar(' '));
if (!references.empty()) {
corrupt();
}
for (auto& r : refs) {
auto r2 = store.storeDir + "/" + r;
if (!store.isStorePath(r2)) {
corrupt();
}
references.insert(r2);
}
} else if (name == "Deriver") {
if (value != "unknown-deriver") {
auto p = store.storeDir + "/" + value;
if (!store.isStorePath(p)) {
corrupt();
}
deriver = p;
}
} else if (name == "System") {
system = value;
} else if (name == "Sig") {
sigs.insert(value);
} else if (name == "CA") {
if (!ca.empty()) {
corrupt();
}
ca = value;
}
pos = eol + 1;
}
if (compression.empty()) {
compression = "bzip2";
}
if (path.empty() || url.empty() || narSize == 0 || !narHash) {
corrupt();
}
}
std::string NarInfo::to_string() const {
std::string res;
res += "StorePath: " + path + "\n";
res += "URL: " + url + "\n";
assert(!compression.empty());
res += "Compression: " + compression + "\n";
assert(fileHash.type == htSHA256);
res += "FileHash: " + fileHash.to_string(Base32) + "\n";
res += "FileSize: " + std::to_string(fileSize) + "\n";
assert(narHash.type == htSHA256);
res += "NarHash: " + narHash.to_string(Base32) + "\n";
res += "NarSize: " + std::to_string(narSize) + "\n";
res += "References: " + concatStringsSep(" ", shortRefs()) + "\n";
if (!deriver.empty()) {
res += "Deriver: " + baseNameOf(deriver) + "\n";
}
if (!system.empty()) {
res += "System: " + system + "\n";
}
for (const auto& sig : sigs) {
res += "Sig: " + sig + "\n";
}
if (!ca.empty()) {
res += "CA: " + ca + "\n";
}
return res;
}
} // namespace nix
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