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Merge pull request #8233 from wentasah/narinfo-corrupt-reason
Make "NAR info file is corrupt" messages more informative
This commit is contained in:
commit
d3e2394e91
1 changed files with 22 additions and 10 deletions
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@ -7,15 +7,18 @@ namespace nix {
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NarInfo::NarInfo(const Store & store, const std::string & s, const std::string & whence)
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: ValidPathInfo(StorePath(StorePath::dummy), Hash(Hash::dummy)) // FIXME: hack
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{
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auto corrupt = [&]() {
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return Error("NAR info file '%1%' is corrupt", whence);
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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();
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throw corrupt("bad hash");
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}
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};
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@ -26,12 +29,12 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
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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();
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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();
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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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@ -47,7 +50,7 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
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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();
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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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@ -56,12 +59,12 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
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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();
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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();
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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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@ -72,17 +75,26 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
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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();
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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) throw corrupt();
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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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