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Move GitHub input attribute validation into inputFromAttrs()

Browse source 
Previously inputFromAttrs() didn't do any validation. inputFromURL()
now calls inputFromAttrs(), so we only need to validate in one place.

Fixes #14655.
This commit is contained in:
Eelco Dolstra 2025-11-26 19:38:42 +01:00
parent 3c2d5a1bdc
commit e7f95783db
1 changed files with 33 additions and 30 deletions
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63
src/libfetchers/github.cc
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@ -41,18 +41,16 @@ struct GitArchiveInputScheme : InputScheme
/* This ignores empty path segments for back-compat. Older versions used a tokenizeString here. */
auto path = url.pathSegments(/*skipEmpty=*/true) | std::ranges::to<std::vector<std::string>>();
std::optional<Hash> rev;
std::optional<std::string> rev;
std::optional<std::string> ref;
std::optional<std::string> host_url;
auto size = path.size();
if (size == 3) {
if (std::regex_match(path[2], revRegex))
rev = Hash::parseAny(path[2], HashAlgorithm::SHA1);
else if (isLegalRefName(path[2]))
ref = path[2];
rev = path[2];
else
throw BadURL("in URL '%s', '%s' is not a commit hash or branch/tag name", url, path[2]);
ref = path[2];
} else if (size > 3) {
std::string rs;
for (auto i = std::next(path.begin(), 2); i != path.end(); i++) {
@ -61,12 +59,7 @@ struct GitArchiveInputScheme : InputScheme
rs += "/";
}
}
if (isLegalRefName(rs)) {
ref = rs;
} else {
throw BadURL("in URL '%s', '%s' is not a branch/tag name", url, rs);
}
ref = rs;
} else if (size < 2)
throw BadURL("URL '%s' is invalid", url);
@ -74,40 +67,32 @@ struct GitArchiveInputScheme : InputScheme
if (name == "rev") {
if (rev)
throw BadURL("URL '%s' contains multiple commit hashes", url);
rev = Hash::parseAny(value, HashAlgorithm::SHA1);
rev = value;
} else if (name == "ref") {
if (!isLegalRefName(value))
throw BadURL("URL '%s' contains an invalid branch/tag name", url);
if (ref)
throw BadURL("URL '%s' contains multiple branch/tag names", url);
ref = value;
} else if (name == "host") {
if (!std::regex_match(value, hostRegex))
throw BadURL("URL '%s' contains an invalid instance host", url);
} else if (name == "host")
host_url = value;
}
// FIXME: barf on unsupported attributes
}
if (ref && rev)
throw BadURL("URL '%s' contains both a commit hash and a branch/tag name %s %s", url, *ref, rev->gitRev());
Input input{};
input.attrs.insert_or_assign("type", std::string{schemeName()});
input.attrs.insert_or_assign("owner", path[0]);
input.attrs.insert_or_assign("repo", path[1]);
Attrs attrs;
attrs.insert_or_assign("type", std::string{schemeName()});
attrs.insert_or_assign("owner", path[0]);
attrs.insert_or_assign("repo", path[1]);
if (rev)
input.attrs.insert_or_assign("rev", rev->gitRev());
attrs.insert_or_assign("rev", *rev);
if (ref)
input.attrs.insert_or_assign("ref", *ref);
attrs.insert_or_assign("ref", *ref);
if (host_url)
input.attrs.insert_or_assign("host", *host_url);
attrs.insert_or_assign("host", *host_url);
auto narHash = url.query.find("narHash");
if (narHash != url.query.end())
input.attrs.insert_or_assign("narHash", narHash->second);
attrs.insert_or_assign("narHash", narHash->second);
return input;
return inputFromAttrs(settings, attrs);
}
const std::map<std::string, AttributeInfo> & allowedAttrs() const override
@ -154,6 +139,24 @@ struct GitArchiveInputScheme : InputScheme
getStrAttr(attrs, "owner");
getStrAttr(attrs, "repo");
auto ref = maybeGetStrAttr(attrs, "ref");
auto rev = maybeGetStrAttr(attrs, "rev");
if (ref && rev)
throw BadURL(
"input %s contains both a commit hash ('%s') and a branch/tag name ('%s')",
attrsToJSON(attrs),
*rev,
*ref);
if (rev)
Hash::parseAny(*rev, HashAlgorithm::SHA1);
if (ref && !isLegalRefName(*ref))
throw BadURL("input %s contains an invalid branch/tag name", attrsToJSON(attrs));
if (auto host = maybeGetStrAttr(attrs, "host"); host && !std::regex_match(*host, hostRegex))
throw BadURL("input %s contains an invalid instance host", attrsToJSON(attrs));
Input input{};
input.attrs = attrs;
return input;