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Systematize fetcher input attribute validation

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We now have `schemeName` and `allowedAttrs` functions for this purpose.
We look up the schema with the former; we restrict the set of input
attributes with the latter.
This commit is contained in:
John Ericson 2023-10-30 10:14:27 -04:00
parent a6e587923c
commit 8381eeda6f
8 changed files with 184 additions and 82 deletions
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30
src/libfetchers/git.cc
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@ -285,14 +285,32 @@ struct GitInputScheme : InputScheme
return inputFromAttrs(attrs);
}
std::string_view schemeName() const override
{
return "git";
}
StringSet allowedAttrs() const override
{
return {
"url",
"ref",
"rev",
"shallow",
"submodules",
"lastModified",
"revCount",
"narHash",
"allRefs",
"name",
"dirtyRev",
"dirtyShortRev",
};
}
std::optional<Input> inputFromAttrs(const Attrs & attrs) const override
{
if (maybeGetStrAttr(attrs, "type") != "git") return {};
for (auto & [name, value] : attrs)
if (name != "type" && name != "url" && name != "ref" && name != "rev" && name != "shallow" && name != "submodules" && name != "lastModified" && name != "revCount" && name != "narHash" && name != "allRefs" && name != "name" && name != "dirtyRev" && name != "dirtyShortRev")
throw Error("unsupported Git input attribute '%s'", name);
maybeGetBoolAttr(attrs, "shallow");
maybeGetBoolAttr(attrs, "submodules");
maybeGetBoolAttr(attrs, "allRefs");