forked from lix-project/lix
131 lines
3.9 KiB
C++
131 lines
3.9 KiB
C++
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#include "command.hh"
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#include "globals.hh"
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#include "eval.hh"
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#include "eval-inline.hh"
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#include "names.hh"
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#include "get-drvs.hh"
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#include <regex>
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using namespace nix;
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std::string hilite(const std::string & s, const std::smatch & m)
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{
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return
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m.empty()
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? s
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: std::string(m.prefix())
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+ ANSI_RED + std::string(m.str()) + ANSI_NORMAL
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+ std::string(m.suffix());
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}
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struct CmdSearch : SourceExprCommand
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{
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std::string re;
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CmdSearch()
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{
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expectArg("regex", &re, true);
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}
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std::string name() override
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{
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return "search";
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}
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std::string description() override
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{
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return "query available packages";
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}
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void run(ref<Store> store) override
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{
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settings.readOnlyMode = true;
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std::regex regex(re, std::regex::extended | std::regex::icase);
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auto state = getEvalState();
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std::function<void(Value *, std::string, bool)> doExpr;
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bool first = true;
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doExpr = [&](Value * v, std::string attrPath, bool toplevel) {
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debug("at attribute ‘%s’", attrPath);
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try {
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state->forceValue(*v);
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if (v->type == tLambda && toplevel) {
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Value * v2 = state->allocValue();
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state->autoCallFunction(*state->allocBindings(1), *v, *v2);
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v = v2;
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state->forceValue(*v);
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}
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if (state->isDerivation(*v)) {
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DrvInfo drv(*state, attrPath, v->attrs);
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DrvName parsed(drv.queryName());
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std::smatch attrPathMatch;
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std::regex_search(attrPath, attrPathMatch, regex);
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auto name = parsed.name;
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std::smatch nameMatch;
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std::regex_search(name, nameMatch, regex);
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std::string description = drv.queryMetaString("description");
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std::replace(description.begin(), description.end(), '\n', ' ');
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std::smatch descriptionMatch;
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std::regex_search(description, descriptionMatch, regex);
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if (!attrPathMatch.empty()
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|| !nameMatch.empty()
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|| !descriptionMatch.empty())
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{
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if (!first) std::cout << "\n";
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first = false;
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std::cout << fmt(
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"Attribute name: %s\n"
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"Package name: %s\n"
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"Version: %s\n"
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"Description: %s\n",
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hilite(attrPath, attrPathMatch),
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hilite(name, nameMatch),
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parsed.version,
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hilite(description, descriptionMatch));
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}
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}
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else if (v->type == tAttrs) {
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if (!toplevel) {
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auto attrs = v->attrs;
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Bindings::iterator j = attrs->find(state->symbols.create("recurseForDerivations"));
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if (j == attrs->end() || !state->forceBool(*j->value, *j->pos)) return;
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}
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Bindings::iterator j = v->attrs->find(state->symbols.create("_toplevel"));
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bool toplevel2 = j != v->attrs->end() && state->forceBool(*j->value, *j->pos);
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for (auto & i : *v->attrs) {
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doExpr(i.value,
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attrPath == "" ? (std::string) i.name : attrPath + "." + (std::string) i.name,
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toplevel2);
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}
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}
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} catch (AssertionError & e) {
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}
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};
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doExpr(getSourceExpr(*state), "", true);
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}
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};
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static RegisterCommand r1(make_ref<CmdSearch>());
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