Linus Heckemann
8cf4c2c9e0
This doesn't break any usages within lix, and allows avoiding copying in some calls. The constructor already copies bits and pieces of the data passed in. Change-Id: Iea39906ca430195da4c509dd8a0a54d49b46ca4f
129 lines
4.0 KiB
C++
129 lines
4.0 KiB
C++
#include "lix/libutil/strings.hh"
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#include "lix/libstore/nar-info.hh"
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#include "lix/libstore/store-api.hh"
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namespace nix {
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NarInfo::NarInfo(const Store & store, const std::string_view & s, const std::string_view & whence)
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: ValidPathInfo(StorePath(StorePath::dummy), Hash(Hash::dummy)) // FIXME: hack
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{
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unsigned line = 1;
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auto corrupt = [&](const char * reason) {
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return Error("NAR info file '%1%' is corrupt: %2%", whence,
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std::string(reason) + (line > 0 ? " at line " + std::to_string(line) : ""));
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};
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auto parseHashField = [&](const std::string & s) {
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try {
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return Hash::parseAnyPrefixed(s);
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} catch (BadHash &) {
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throw corrupt("bad hash");
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}
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};
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bool havePath = false;
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bool haveNarHash = false;
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size_t pos = 0;
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while (pos < s.size()) {
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size_t colon = s.find(':', pos);
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if (colon == std::string::npos) throw corrupt("expecting ':'");
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std::string name(s, pos, colon - pos);
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size_t eol = s.find('\n', colon + 2);
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if (eol == std::string::npos) throw corrupt("expecting '\\n'");
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std::string value(s, colon + 2, eol - colon - 2);
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if (name == "StorePath") {
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path = store.parseStorePath(value);
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havePath = true;
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}
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else if (name == "URL")
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url = value;
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else if (name == "Compression")
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compression = value;
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else if (name == "FileHash")
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fileHash = parseHashField(value);
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else if (name == "FileSize") {
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auto n = string2Int<decltype(fileSize)>(value);
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if (!n) throw corrupt("invalid FileSize");
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fileSize = *n;
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}
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else if (name == "NarHash") {
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narHash = parseHashField(value);
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haveNarHash = true;
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}
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else if (name == "NarSize") {
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auto n = string2Int<decltype(narSize)>(value);
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if (!n) throw corrupt("invalid NarSize");
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narSize = *n;
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}
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else if (name == "References") {
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auto refs = tokenizeString<Strings>(value, " ");
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if (!references.empty()) throw corrupt("extra References");
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for (auto & r : refs)
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references.insert(StorePath(r));
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}
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else if (name == "Deriver") {
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if (value != "unknown-deriver")
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deriver = StorePath(value);
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}
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else if (name == "Sig")
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sigs.insert(value);
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else if (name == "CA") {
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if (ca) throw corrupt("extra CA");
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// FIXME: allow blank ca or require skipping field?
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ca = ContentAddress::parseOpt(value);
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}
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pos = eol + 1;
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line += 1;
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}
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if (compression == "") compression = "bzip2";
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if (!havePath || !haveNarHash || url.empty() || narSize == 0) {
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line = 0; // don't include line information in the error
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throw corrupt(
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!havePath ? "StorePath missing" :
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!haveNarHash ? "NarHash missing" :
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url.empty() ? "URL missing" :
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narSize == 0 ? "NarSize missing or zero"
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: "?");
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}
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}
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std::string NarInfo::to_string(const Store & store) const
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{
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std::string res;
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res += "StorePath: " + store.printStorePath(path) + "\n";
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res += "URL: " + url + "\n";
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assert(compression != "");
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res += "Compression: " + compression + "\n";
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assert(fileHash && fileHash->type == HashType::SHA256);
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res += "FileHash: " + fileHash->to_string(Base::Base32, true) + "\n";
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res += "FileSize: " + std::to_string(fileSize) + "\n";
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assert(narHash.type == HashType::SHA256);
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res += "NarHash: " + narHash.to_string(Base::Base32, true) + "\n";
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res += "NarSize: " + std::to_string(narSize) + "\n";
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res += "References: " + concatStringsSep(" ", shortRefs()) + "\n";
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if (deriver)
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res += "Deriver: " + std::string(deriver->to_string()) + "\n";
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for (auto sig : sigs)
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res += "Sig: " + sig + "\n";
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if (ca)
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res += "CA: " + renderContentAddress(ca) + "\n";
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return res;
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}
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}
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