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Merge pull request #8233 from wentasah/narinfo-corrupt-reason

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Make "NAR info file is corrupt" messages more informative
This commit is contained in:
Théophane Hufschmitt 2023-04-19 06:57:08 +02:00 committed by GitHub
commit d3e2394e91
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 22 additions and 10 deletions
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32
src/libstore/nar-info.cc
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@ -7,15 +7,18 @@ namespace nix {
NarInfo::NarInfo(const Store & store, const std::string & s, const std::string & whence)
: ValidPathInfo(StorePath(StorePath::dummy), Hash(Hash::dummy)) // FIXME: hack
{
auto corrupt = [&]() {
return Error("NAR info file '%1%' is corrupt", whence);
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();
throw corrupt("bad hash");
}
};
@ -26,12 +29,12 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
while (pos < s.size()) {
size_t colon = s.find(':', pos);
if (colon == std::string::npos) throw corrupt();
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();
if (eol == std::string::npos) throw corrupt("expecting '\\n'");
std::string value(s, colon + 2, eol - colon - 2);
@ -47,7 +50,7 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
fileHash = parseHashField(value);
else if (name == "FileSize") {
auto n = string2Int<decltype(fileSize)>(value);
if (!n) throw corrupt();
if (!n) throw corrupt("invalid FileSize");
fileSize = *n;
}
else if (name == "NarHash") {
@ -56,12 +59,12 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
}
else if (name == "NarSize") {
auto n = string2Int<decltype(narSize)>(value);
if (!n) throw corrupt();
if (!n) throw corrupt("invalid NarSize");
narSize = *n;
}
else if (name == "References") {
auto refs = tokenizeString<Strings>(value, " ");
if (!references.empty()) throw corrupt();
if (!references.empty()) throw corrupt("extra References");
for (auto & r : refs)
references.insert(StorePath(r));
}
@ -72,17 +75,26 @@ NarInfo::NarInfo(const Store & store, const std::string & s, const std::string &
else if (name == "Sig")
sigs.insert(value);
else if (name == "CA") {
if (ca) throw corrupt();
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) throw corrupt();
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