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Clean up --arg processing

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This commit is contained in:
Eelco Dolstra 2024-03-01 14:14:14 +01:00
parent bf48501194
commit d72ee91d07
2 changed files with 18 additions and 9 deletions
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20
src/libcmd/common-eval-args.cc
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@ -20,7 +20,7 @@ MixEvalArgs::MixEvalArgs()
.description = "Pass the value *expr* as the argument *name* to Nix functions.",
.category = category,
.labels = {"name", "expr"},
.handler = {[&](std::string name, std::string expr) { autoArgs[name] = 'E' + expr; }}
.handler = {[&](std::string name, std::string expr) { autoArgs.insert_or_assign(name, AutoArg{AutoArgExpr(expr)}); }}
});
addFlag({
@ -28,7 +28,7 @@ MixEvalArgs::MixEvalArgs()
.description = "Pass the string *string* as the argument *name* to Nix functions.",
.category = category,
.labels = {"name", "string"},
.handler = {[&](std::string name, std::string s) { autoArgs[name] = 'S' + s; }},
.handler = {[&](std::string name, std::string s) { autoArgs.insert_or_assign(name, AutoArg{AutoArgString(s)}); }},
});
addFlag({
@ -154,13 +154,17 @@ MixEvalArgs::MixEvalArgs()
Bindings * MixEvalArgs::getAutoArgs(EvalState & state)
{
auto res = state.buildBindings(autoArgs.size());
for (auto & i : autoArgs) {
for (auto & [name, arg] : autoArgs) {
auto v = state.allocValue();
if (i.second[0] == 'E')
state.mkThunk_(*v, state.parseExprFromString(i.second.substr(1), state.rootPath(".")));
else
v->mkString(((std::string_view) i.second).substr(1));
res.insert(state.symbols.create(i.first), v);
std::visit(overloaded {
[&](const AutoArgExpr & arg) {
state.mkThunk_(*v, state.parseExprFromString(arg.expr, state.rootPath(".")));
},
[&](const AutoArgString & arg) {
v->mkString(arg.s);
}
}, arg);
res.insert(state.symbols.create(name), v);
}
return res.finish();
}

7
src/libcmd/common-eval-args.hh
View file

@ -26,7 +26,12 @@ struct MixEvalArgs : virtual Args, virtual MixRepair
std::optional<std::string> evalStoreUrl;
private:
std::map<std::string, std::string> autoArgs;
struct AutoArgExpr { std::string expr; };
struct AutoArgString { std::string s; };
using AutoArg = std::variant<AutoArgExpr, AutoArgString>;
std::map<std::string, AutoArg> autoArgs;
};
SourcePath lookupFileArg(EvalState & state, std::string_view s, const Path * baseDir = nullptr);