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#include "globals.hh"
#include "nar-info.hh"
#include "store-api.hh"
namespace nix {
NarInfo::NarInfo(const Store & store, const std::string & s, const std::string & whence)
: ValidPathInfo(StorePath(StorePath::dummy), Hash(Hash::dummy)) // FIXME: hack
{
unsigned line = 1;
auto corrupt = [&](const char * reason) {
return Error("NAR info file '%1%' is corrupt: %2%", whence,
std::string(reason) + (line > 0 ? " at line " + std::to_string(line) : ""));
};
auto parseHashField = [&](const std::string & s) {
try {
return Hash::parseAnyPrefixed(s);
} catch (BadHash &) {
throw corrupt("bad hash");
}
};
bool havePath = false;
bool haveNarHash = false;
size_t pos = 0;
while (pos < s.size()) {
size_t colon = s.find(':', pos);
if (colon == std::string::npos) throw corrupt("expecting ':'");
std::string name(s, pos, colon - pos);
size_t eol = s.find('\n', colon + 2);
if (eol == std::string::npos) throw corrupt("expecting '\\n'");
std::string value(s, colon + 2, eol - colon - 2);
if (name == "StorePath") {
path = store.parseStorePath(value);
havePath = true;
}
else if (name == "URL")
url = value;
else if (name == "Compression")
compression = value;
else if (name == "FileHash")
fileHash = parseHashField(value);
else if (name == "FileSize") {
auto n = string2Int<decltype(fileSize)>(value);
if (!n) throw corrupt("invalid FileSize");
fileSize = *n;
}
else if (name == "NarHash") {
narHash = parseHashField(value);
haveNarHash = true;
}
else if (name == "NarSize") {
auto n = string2Int<decltype(narSize)>(value);
if (!n) throw corrupt("invalid NarSize");
narSize = *n;
}
else if (name == "References") {
auto refs = tokenizeString<Strings>(value, " ");
if (!references.empty()) throw corrupt("extra References");
for (auto & r : refs)
references.insert(StorePath(r));
}
else if (name == "Deriver") {
if (value != "unknown-deriver")
deriver = StorePath(value);
}
else if (name == "Sig")
sigs.insert(value);
else if (name == "CA") {
if (ca) throw corrupt("extra CA");
// FIXME: allow blank ca or require skipping field?
ca = ContentAddress::parseOpt(value);
}
pos = eol + 1;
line += 1;
}
if (compression == "") compression = "bzip2";
if (!havePath || !haveNarHash || url.empty() || narSize == 0) {
line = 0; // don't include line information in the error
throw corrupt(
!havePath ? "StorePath missing" :
!haveNarHash ? "NarHash missing" :
url.empty() ? "URL missing" :
narSize == 0 ? "NarSize missing or zero"
: "?");
}
}
std::string NarInfo::to_string(const Store & store) const
{
std::string res;
res += "StorePath: " + store.printStorePath(path) + "\n";
res += "URL: " + url + "\n";
assert(compression != "");
res += "Compression: " + compression + "\n";
assert(fileHash && fileHash->type == HashType::SHA256);
res += "FileHash: " + fileHash->to_string(Base::Base32, true) + "\n";
res += "FileSize: " + std::to_string(fileSize) + "\n";
assert(narHash.type == HashType::SHA256);
res += "NarHash: " + narHash.to_string(Base::Base32, true) + "\n";
res += "NarSize: " + std::to_string(narSize) + "\n";
res += "References: " + concatStringsSep(" ", shortRefs()) + "\n";
if (deriver)
res += "Deriver: " + std::string(deriver->to_string()) + "\n";
for (auto sig : sigs)
res += "Sig: " + sig + "\n";
if (ca)
res += "CA: " + renderContentAddress(*ca) + "\n";
return res;
}
}
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