diff options
Diffstat (limited to 'third_party/nix/src/nix/search.cc')
| -rw-r--r-- | third_party/nix/src/nix/search.cc | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/third_party/nix/src/nix/search.cc b/third_party/nix/src/nix/search.cc deleted file mode 100644 index 5a6bae6a11..0000000000 --- a/third_party/nix/src/nix/search.cc +++ /dev/null @@ -1,276 +0,0 @@ -#include <fstream> -#include <regex> - -#include <glog/logging.h> - -#include "libexpr/eval-inline.hh" -#include "libexpr/eval.hh" -#include "libexpr/get-drvs.hh" -#include "libexpr/json-to-value.hh" -#include "libexpr/names.hh" -#include "libmain/common-args.hh" -#include "libmain/shared.hh" -#include "libstore/globals.hh" -#include "libutil/json.hh" -#include "nix/command.hh" - -namespace { -std::string wrap(const std::string& prefix, const std::string& s) { - return prefix + s + ANSI_NORMAL; -} - -std::string hilite(const std::string& s, const std::smatch& m, - const std::string& postfix) { - return m.empty() ? s - : std::string(m.prefix()) + ANSI_RED + std::string(m.str()) + - postfix + std::string(m.suffix()); -} -} // namespace - -namespace nix { -struct CmdSearch final : SourceExprCommand, MixJSON { - std::vector<std::string> res; - - bool writeCache = true; - bool useCache = true; - - CmdSearch() { - expectArgs("regex", &res); - - mkFlag() - .longName("update-cache") - .shortName('u') - .description("update the package search cache") - .handler([&]() { - writeCache = true; - useCache = false; - }); - - mkFlag() - .longName("no-cache") - .description("do not use or update the package search cache") - .handler([&]() { - writeCache = false; - useCache = false; - }); - } - - std::string name() override { return "search"; } - - std::string description() override { return "query available packages"; } - - Examples examples() override { - return {Example{"To show all available packages:", "nix search"}, - Example{"To show any packages containing 'blender' in its name or " - "description:", - "nix search blender"}, - Example{"To search for Firefox or Chromium:", - "nix search 'firefox|chromium'"}, - Example{"To search for git and frontend or gui:", - "nix search git 'frontend|gui'"}}; - } - - void run(ref<Store> store) override { - settings.readOnlyMode = true; - - // Empty search string should match all packages - // Use "^" here instead of ".*" due to differences in resulting highlighting - // (see #1893 -- libc++ claims empty search string is not in POSIX grammar) - if (res.empty()) { - res.emplace_back("^"); - } - - std::vector<std::regex> regexes; - regexes.reserve(res.size()); - - for (auto& re : res) { - regexes.emplace_back(re, std::regex::extended | std::regex::icase); - } - - auto state = getEvalState(); - - auto jsonOut = json ? std::make_unique<JSONObject>(std::cout) : nullptr; - - auto sToplevel = state->symbols.Create("_toplevel"); - auto sRecurse = state->symbols.Create("recurseForDerivations"); - - bool fromCache = false; - - std::map<std::string, std::string> results; - - std::function<void(Value*, std::string, bool, JSONObject*)> doExpr; - - doExpr = [&](Value* v, const std::string& attrPath, bool toplevel, - JSONObject* cache) { - DLOG(INFO) << "at attribute '" << attrPath << "'"; - - try { - uint found = 0; - - state->forceValue(*v); - - if (v->type == tLambda && toplevel) { - Value* v2 = state->allocValue(); - auto dummyArgs = Bindings::New(); - state->autoCallFunction(dummyArgs.get(), *v, *v2); - v = v2; - state->forceValue(*v); - } - - if (state->isDerivation(*v)) { - DrvInfo drv(*state, attrPath, v->attrs); - std::string description; - std::smatch attrPathMatch; - std::smatch descriptionMatch; - std::smatch nameMatch; - std::string name; - - DrvName parsed(drv.queryName()); - - for (auto& regex : regexes) { - std::regex_search(attrPath, attrPathMatch, regex); - - name = parsed.name; - std::regex_search(name, nameMatch, regex); - - description = drv.queryMetaString("description"); - std::replace(description.begin(), description.end(), '\n', ' '); - std::regex_search(description, descriptionMatch, regex); - - if (!attrPathMatch.empty() || !nameMatch.empty() || - !descriptionMatch.empty()) { - found++; - } - } - - if (found == res.size()) { - if (json) { - auto jsonElem = jsonOut->object(attrPath); - - jsonElem.attr("pkgName", parsed.name); - jsonElem.attr("version", parsed.version); - jsonElem.attr("description", description); - - } else { - auto name = hilite(parsed.name, nameMatch, "\e[0;2m") + - std::string(parsed.fullName, parsed.name.length()); - results[attrPath] = fmt( - "* %s (%s)\n %s\n", - wrap("\e[0;1m", hilite(attrPath, attrPathMatch, "\e[0;1m")), - wrap("\e[0;2m", hilite(name, nameMatch, "\e[0;2m")), - hilite(description, descriptionMatch, ANSI_NORMAL)); - } - } - - if (cache != nullptr) { - cache->attr("type", "derivation"); - cache->attr("name", drv.queryName()); - cache->attr("system", drv.querySystem()); - if (!description.empty()) { - auto meta(cache->object("meta")); - meta.attr("description", description); - } - } - } - - else if (v->type == tAttrs) { - if (!toplevel) { - auto attrs = v->attrs; - Bindings::iterator j = attrs->find(sRecurse); - if (j == attrs->end() || - !state->forceBool(*j->second.value, *j->second.pos)) { - DLOG(INFO) << "skip attribute '" << attrPath << "'"; - return; - } - } - - bool toplevel2 = false; - if (!fromCache) { - Bindings::iterator j = v->attrs->find(sToplevel); - toplevel2 = j != v->attrs->end() && - state->forceBool(*j->second.value, *j->second.pos); - } - - for (auto& i : *v->attrs) { - auto cache2 = - cache != nullptr - ? std::make_unique<JSONObject>(cache->object(i.second.name)) - : nullptr; - doExpr(i.second.value, - attrPath.empty() - ? std::string(i.second.name) - : attrPath + "." + std::string(i.second.name), - toplevel2 || fromCache, cache2 ? cache2.get() : nullptr); - } - } - - } catch (AssertionError& e) { - } catch (Error& e) { - if (!toplevel) { - e.addPrefix(fmt("While evaluating the attribute '%s':\n", attrPath)); - throw; - } - } - }; - - Path jsonCacheFileName = getCacheDir() + "/nix/package-search.json"; - - if (useCache && pathExists(jsonCacheFileName)) { - LOG(WARNING) << "using cached results; pass '-u' to update the cache"; - - Value vRoot; - parseJSON(*state, readFile(jsonCacheFileName), vRoot); - - fromCache = true; - - doExpr(&vRoot, "", true, nullptr); - } - - else { - createDirs(dirOf(jsonCacheFileName)); - - Path tmpFile = fmt("%s.tmp.%d", jsonCacheFileName, getpid()); - - std::ofstream jsonCacheFile; - - try { - // iostream considered harmful - jsonCacheFile.exceptions(std::ofstream::failbit); - jsonCacheFile.open(tmpFile); - - auto cache = writeCache - ? std::make_unique<JSONObject>(jsonCacheFile, false) - : nullptr; - - doExpr(getSourceExpr(*state), "", true, cache.get()); - - } catch (std::exception&) { - /* Fun fact: catching std::ios::failure does not work - due to C++11 ABI shenanigans. - https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66145 */ - if (!jsonCacheFile) { - throw Error("error writing to %s", tmpFile); - } - throw; - } - - if (writeCache && - rename(tmpFile.c_str(), jsonCacheFileName.c_str()) == -1) { - throw SysError("cannot rename '%s' to '%s'", tmpFile, - jsonCacheFileName); - } - } - - if (results.empty()) { - throw Error("no results for the given search term(s)!"); - } - - RunPager pager; - for (const auto& el : results) { - std::cout << el.second << "\n"; - } - } -}; -} // namespace nix - -static nix::RegisterCommand r1(nix::make_ref<nix::CmdSearch>()); |