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Only print example when there is one

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Chuck 2019-09-16 10:01:40 -07:00 committed by Linus Heckemann
parent 4d17d5b31f
commit 5646240870
1 changed files with 13 additions and 2 deletions
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15
nixos/modules/installer/tools/nixos-option/nixos-option.cc
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@ -402,6 +402,15 @@ void printAttr(Context & ctx, Out & out, const std::string & path, Value & root)
} }
} }
bool has_example(Context & ctx, Value & option) {
try {
findAlongAttrPath(ctx.state, "example", ctx.autoArgs, option);
return true;
} catch (Error &) {
return false;
}
}
void printOption(Context & ctx, Out & out, const std::string & path, Value & option) void printOption(Context & ctx, Out & out, const std::string & path, Value & option)
{ {
out << "Value:\n"; out << "Value:\n";
@ -413,8 +422,10 @@ void printOption(Context & ctx, Out & out, const std::string & path, Value & opt
out << "\n\nType:\n"; out << "\n\nType:\n";
printAttr(ctx, out, "type.description", option); printAttr(ctx, out, "type.description", option);
out << "\n\nExample:\n"; if (has_example(ctx, option)) {
printAttr(ctx, out, "example", option); out << "\n\nExample:\n";
printAttr(ctx, out, "example", option);
}
out << "\n\nDescription:\n"; out << "\n\nDescription:\n";
printAttr(ctx, out, "description", option); printAttr(ctx, out, "description", option);