diff options
Diffstat (limited to 'src/libstore/nar-info.cc')
-rw-r--r-- | src/libstore/nar-info.cc | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/libstore/nar-info.cc b/src/libstore/nar-info.cc new file mode 100644 index 000000000000..d1042c6de25e --- /dev/null +++ b/src/libstore/nar-info.cc @@ -0,0 +1,116 @@ +#include "globals.hh" +#include "nar-info.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 string & s) { + try { + return parseHash(s); + } catch (BadHash &) { + corrupt(); + return Hash(); // never reached + } + }; + + 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 (!string2Int(value, fileSize)) corrupt(); + } + else if (name == "NarHash") + narHash = parseHashField(value); + else if (name == "NarSize") { + if (!string2Int(value, narSize)) corrupt(); + } + else if (name == "References") { + auto refs = tokenizeString<Strings>(value, " "); + 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 == "") 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 != ""); + res += "Compression: " + compression + "\n"; + assert(fileHash.type == htSHA256); + res += "FileHash: sha256:" + printHash32(fileHash) + "\n"; + res += "FileSize: " + std::to_string(fileSize) + "\n"; + assert(narHash.type == htSHA256); + res += "NarHash: sha256:" + printHash32(narHash) + "\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 (auto sig : sigs) + res += "Sig: " + sig + "\n"; + + if (!ca.empty()) + res += "CA: " + ca + "\n"; + + return res; +} + +} |