forked from lix-project/lix
Add ability to toggle show-trace from within the repl
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@ -2,3 +2,5 @@
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* The TOML parser used by `builtins.fromTOML` has been replaced by [a
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more compliant one](https://github.com/ToruNiina/toml11).
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* Added `:st`/`:show-trace` commands to nix repl, which are used to
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set or toggle display of error traces.
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@ -430,7 +430,8 @@ bool NixRepl::processLine(string line)
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<< " :t <expr> Describe result of evaluation\n"
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<< " :u <expr> Build derivation, then start nix-shell\n"
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<< " :doc <expr> Show documentation of a builtin function\n"
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<< " :log <expr> Show logs for a derivation\n";
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<< " :log <expr> Show logs for a derivation\n"
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<< " :st [bool] Enable, disable or toggle showing traces for errors\n";
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}
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else if (command == ":a" || command == ":add") {
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@ -572,6 +573,18 @@ bool NixRepl::processLine(string line)
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throw Error("value does not have documentation");
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}
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else if (command == ":st" || command == ":show-trace") {
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if (arg == "false" || (arg == "" && loggerSettings.showTrace)) {
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std::cout << "not showing error traces\n";
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loggerSettings.showTrace = false;
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} else if (arg == "true" || (arg == "" && !loggerSettings.showTrace)) {
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std::cout << "showing error traces\n";
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loggerSettings.showTrace = true;
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} else {
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throw Error("unexpected argument '%s' to %s", arg, command);
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};
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}
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else if (command != "")
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throw Error("unknown command '%1%'", command);
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