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refactor: Add explicit DISALLOW_NEGATION ArgsManager flag to clarify flag usage

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Currently, ALLOW_{INT|BOOL|STRING} flags don't do any real validation,
so current uses of these flags are misleading and will also break
backwards compatibility whenever these flags are implemented in a future
PR (draft PR is #16545).

An additional complication is that while these flags don't do any real
settings validation, they do affect whether setting negation syntax is
allowed.

Fix this mess by disabling ALLOW_{INT|BOOL|STRING} flags until they are
implemented, and adding an unambiguous DISALLOW_NEGATION flag. This is
done in two commits, with this commit adding the DISALLOW_NEGATION flag,
and the next commit disabling the ALLOW_{INT|BOOL|STRING} flags.
This commit is contained in:
Russell Yanofsky
2021-08-21 14:06:49 -04:00
parent 26a50ab322
commit b8c069b7a9
2 changed files with 13 additions and 6 deletions
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3
src/util/system.cpp
View File

@@ -230,7 +230,7 @@ static std::optional<util::SettingsValue> InterpretValue(const KeyInfo& key, con
{
// Return negated settings as false values.
if (key.negated) {
if (!(flags & ArgsManager::ALLOW_BOOL)) {
if (flags & ArgsManager::DISALLOW_NEGATION) {
error = strprintf("Negating of -%s is meaningless and therefore forbidden", key.name);
return std::nullopt;
}
@@ -652,6 +652,7 @@ void ArgsManager::AddArg(const std::string& name, const std::string& help, unsig
LOCK(cs_args);
std::map<std::string, Arg>& arg_map = m_available_args[cat];
if ((flags & (ALLOW_ANY | ALLOW_BOOL)) == 0) flags |= DISALLOW_NEGATION; // Temporary, removed in next scripted-diff
auto ret = arg_map.emplace(arg_name, Arg{name.substr(eq_index, name.size() - eq_index), help, flags});
assert(ret.second); // Make sure an insertion actually happened

16
src/util/system.h
View File

@@ -158,12 +158,18 @@ struct SectionInfo
class ArgsManager
{
public:
/**
* Flags controlling how config and command line arguments are validated and
* interpreted.
*/
enum Flags : uint32_t {
// Boolean options can accept negation syntax -noOPTION or -noOPTION=1
ALLOW_BOOL = 0x01,
ALLOW_INT = 0x02,
ALLOW_STRING = 0x04,
ALLOW_ANY = ALLOW_BOOL | ALLOW_INT | ALLOW_STRING,
ALLOW_ANY = 0x01, //!< disable validation
ALLOW_BOOL = 0x02, //!< unimplemented, draft implementation in #16545
ALLOW_INT = 0x04, //!< unimplemented, draft implementation in #16545
ALLOW_STRING = 0x08, //!< unimplemented, draft implementation in #16545
ALLOW_LIST = 0x10, //!< unimplemented, draft implementation in #16545
DISALLOW_NEGATION = 0x20, //!< disallow -nofoo syntax
DEBUG_ONLY = 0x100,
/* Some options would cause cross-contamination if values for
* mainnet were used while running on regtest/testnet (or vice-versa).