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Allow plugins to define new settings.

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This commit is contained in:
Shea Levy 2018-02-13 14:43:32 -05:00
parent 3fe9767dd3
commit de4934ab3b
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GPG key ID: 5C0BD6957D86FE27
8 changed files with 65 additions and 32 deletions
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42
src/libutil/config.cc
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@ -7,10 +7,12 @@ namespace nix {
void Config::set(const std::string & name, const std::string & value)
{
auto i = _settings.find(name);
if (i == _settings.end())
throw UsageError("unknown setting '%s'", name);
i->second.setting->set(value);
i->second.setting->overriden = true;
if (i == _settings.end()) {
extras.emplace(name, value);
} else {
i->second.setting->set(value);
i->second.setting->overriden = true;
}
}
void Config::addSetting(AbstractSetting * setting)
@ -21,34 +23,37 @@ void Config::addSetting(AbstractSetting * setting)
bool set = false;
auto i = initials.find(setting->name);
if (i != initials.end()) {
auto i = extras.find(setting->name);
if (i != extras.end()) {
setting->set(i->second);
setting->overriden = true;
initials.erase(i);
extras.erase(i);
set = true;
}
for (auto & alias : setting->aliases) {
auto i = initials.find(alias);
if (i != initials.end()) {
auto i = extras.find(alias);
if (i != extras.end()) {
if (set)
warn("setting '%s' is set, but it's an alias of '%s' which is also set",
alias, setting->name);
else {
setting->set(i->second);
setting->overriden = true;
initials.erase(i);
extras.erase(i);
set = true;
}
}
}
}
void Config::warnUnknownSettings()
void Config::handleUnknownSettings(bool fatal)
{
for (auto & i : initials)
warn("unknown setting '%s'", i.first);
for (auto & s : extras)
if (fatal)
throw UsageError("unknown setting '%s%'", s.first);
else
warn("unknown setting '%s'", s.first);
}
StringMap Config::getSettings(bool overridenOnly)
@ -60,7 +65,7 @@ StringMap Config::getSettings(bool overridenOnly)
return res;
}
void Config::applyConfigFile(const Path & path, bool fatal)
void Config::applyConfigFile(const Path & path)
{
try {
string contents = readFile(path);
@ -97,7 +102,7 @@ void Config::applyConfigFile(const Path & path, bool fatal)
throw UsageError("illegal configuration line '%1%' in '%2%'", line, path);
auto p = absPath(tokens[1], dirOf(path));
if (pathExists(p)) {
applyConfigFile(p, fatal);
applyConfigFile(p);
} else if (!ignoreMissing) {
throw Error("file '%1%' included from '%2%' not found", p, path);
}
@ -112,12 +117,7 @@ void Config::applyConfigFile(const Path & path, bool fatal)
vector<string>::iterator i = tokens.begin();
advance(i, 2);
try {
set(name, concatStringsSep(" ", Strings(i, tokens.end()))); // FIXME: slow
} catch (UsageError & e) {
if (fatal) throw;
warn("in configuration file '%s': %s", path, e.what());
}
set(name, concatStringsSep(" ", Strings(i, tokens.end()))); // FIXME: slow
};
} catch (SysError &) { }
}