diff options
Diffstat (limited to 'third_party/nix/src/nix-build/nix-build.cc')
| -rw-r--r-- | third_party/nix/src/nix-build/nix-build.cc | 581 |
1 files changed, 0 insertions, 581 deletions
diff --git a/third_party/nix/src/nix-build/nix-build.cc b/third_party/nix/src/nix-build/nix-build.cc deleted file mode 100644 index 26c3089677..0000000000 --- a/third_party/nix/src/nix-build/nix-build.cc +++ /dev/null @@ -1,581 +0,0 @@ -#include <cstring> -#include <fstream> -#include <iostream> -#include <regex> -#include <sstream> -#include <vector> - -#include <absl/strings/ascii.h> -#include <absl/strings/str_split.h> -#include <glog/logging.h> - -#include "libexpr/attr-path.hh" -#include "libexpr/common-eval-args.hh" -#include "libexpr/eval-inline.hh" -#include "libexpr/eval.hh" -#include "libexpr/get-drvs.hh" -#include "libmain/shared.hh" -#include "libstore/derivations.hh" -#include "libstore/globals.hh" -#include "libstore/store-api.hh" -#include "libutil/affinity.hh" -#include "libutil/status.hh" -#include "libutil/util.hh" -#include "nix/legacy.hh" - -using namespace nix; -using namespace std::string_literals; - -/* Recreate the effect of the perl shellwords function, breaking up a - * string into arguments like a shell word, including escapes - */ -std::vector<std::string> shellwords(const std::string& s) { - std::regex whitespace("^(\\s+).*"); - auto begin = s.cbegin(); - std::vector<std::string> res; - std::string cur; - enum state { sBegin, sQuote }; - state st = sBegin; - auto it = begin; - for (; it != s.cend(); ++it) { - if (st == sBegin) { - std::smatch match; - if (regex_search(it, s.cend(), match, whitespace)) { - cur.append(begin, it); - res.push_back(cur); - cur.clear(); - it = match[1].second; - begin = it; - } - } - switch (*it) { - case '"': - cur.append(begin, it); - begin = it + 1; - st = st == sBegin ? sQuote : sBegin; - break; - case '\\': - /* perl shellwords mostly just treats the next char as part of the - * string with no special processing */ - cur.append(begin, it); - begin = ++it; - break; - } - } - cur.append(begin, it); - if (!cur.empty()) { - res.push_back(cur); - } - return res; -} - -static void _main(int argc, char** argv) { - auto dryRun = false; - auto runEnv = std::regex_search(argv[0], std::regex("nix-shell$")); - auto pure = false; - auto fromArgs = false; - auto packages = false; - // Same condition as bash uses for interactive shells - auto interactive = - (isatty(STDIN_FILENO) != 0) && (isatty(STDERR_FILENO) != 0); - Strings attrPaths; - Strings left; - RepairFlag repair = NoRepair; - Path gcRoot; - BuildMode buildMode = bmNormal; - bool readStdin = false; - - std::string envCommand; // interactive shell - Strings envExclude; - - auto myName = runEnv ? "nix-shell" : "nix-build"; - - auto inShebang = false; - std::string script; - std::vector<std::string> savedArgs; - - AutoDelete tmpDir(createTempDir("", myName)); - - std::string outLink = "./result"; - - // List of environment variables kept for --pure - std::set<std::string> keepVars{ - "HOME", "USER", "LOGNAME", "DISPLAY", "PATH", "TERM", - "IN_NIX_SHELL", "TZ", "PAGER", "NIX_BUILD_SHELL", "SHLVL"}; - - Strings args; - for (int i = 1; i < argc; ++i) { - args.push_back(argv[i]); - } - - // Heuristic to see if we're invoked as a shebang script, namely, - // if we have at least one argument, it's the name of an - // executable file, and it starts with "#!". - if (runEnv && argc > 1 && - !std::regex_search(argv[1], std::regex("nix-shell"))) { - script = argv[1]; - try { - Strings lines = absl::StrSplit(readFile(script), absl::ByChar('\n'), - absl::SkipEmpty()); - if (std::regex_search(lines.front(), std::regex("^#!"))) { - lines.pop_front(); - inShebang = true; - for (int i = 2; i < argc; ++i) { - savedArgs.emplace_back(argv[i]); - } - args.clear(); - for (auto line : lines) { - line = absl::StripTrailingAsciiWhitespace(line); - std::smatch match; - if (std::regex_match(line, match, - std::regex("^#!\\s*nix-shell (.*)$"))) { - for (const auto& word : shellwords(match[1].str())) { - args.push_back(word); - } - } - } - } - } catch (SysError&) { - } - } - - struct MyArgs : LegacyArgs, MixEvalArgs { - using LegacyArgs::LegacyArgs; - }; - - MyArgs myArgs( - myName, [&](Strings::iterator& arg, const Strings::iterator& end) { - if (*arg == "--help") { - deletePath(Path(tmpDir)); - showManPage(myName); - } - - else if (*arg == "--version") { - printVersion(myName); - - } else if (*arg == "--add-drv-link" || *arg == "--indirect") { - ; // obsolete - - } else if (*arg == "--no-out-link" || *arg == "--no-link") { - outLink = Path(tmpDir) + "/result"; - - } else if (*arg == "--attr" || *arg == "-A") { - attrPaths.push_back(getArg(*arg, arg, end)); - - } else if (*arg == "--drv-link") { - getArg(*arg, arg, end); // obsolete - - } else if (*arg == "--out-link" || *arg == "-o") { - outLink = getArg(*arg, arg, end); - - } else if (*arg == "--add-root") { - gcRoot = getArg(*arg, arg, end); - - } else if (*arg == "--dry-run") { - dryRun = true; - - } else if (*arg == "--repair") { - repair = Repair; - buildMode = bmRepair; - } - - else if (*arg == "--run-env") { // obsolete - runEnv = true; - - } else if (*arg == "--command" || *arg == "--run") { - if (*arg == "--run") { - interactive = false; - } - envCommand = getArg(*arg, arg, end) + "\nexit"; - } - - else if (*arg == "--check") { - buildMode = bmCheck; - - } else if (*arg == "--exclude") { - envExclude.push_back(getArg(*arg, arg, end)); - - } else if (*arg == "--expr" || *arg == "-E") { - fromArgs = true; - - } else if (runEnv && *arg == "--pure") { - pure = true; - } else if (runEnv && *arg == "--impure") { - pure = false; - - } else if (*arg == "--packages" || *arg == "-p") { - packages = true; - - } else if (inShebang && *arg == "-i") { - auto interpreter = getArg(*arg, arg, end); - interactive = false; - auto execArgs = ""; - - // Überhack to support Perl. Perl examines the shebang and - // executes it unless it contains the string "perl" or "indir", - // or (undocumented) argv[0] does not contain "perl". Exploit - // the latter by doing "exec -a". - if (std::regex_search(interpreter, std::regex("perl"))) { - execArgs = "-a PERL"; - } - - std::ostringstream joined; - for (const auto& i : savedArgs) { - joined << shellEscape(i) << ' '; - } - - if (std::regex_search(interpreter, std::regex("ruby"))) { - // Hack for Ruby. Ruby also examines the shebang. It tries to - // read the shebang to understand which packages to read from. Since - // this is handled via nix-shell -p, we wrap our ruby script - // execution in ruby -e 'load' which ignores the shebangs. - envCommand = (format("exec %1% %2% -e 'load(\"%3%\")' -- %4%") % - execArgs % interpreter % script % joined.str()) - .str(); - } else { - envCommand = (format("exec %1% %2% %3% %4%") % execArgs % - interpreter % script % joined.str()) - .str(); - } - } - - else if (*arg == "--keep") { - keepVars.insert(getArg(*arg, arg, end)); - - } else if (*arg == "-") { - readStdin = true; - - } else if (*arg != "" && arg->at(0) == '-') { - return false; - - } else { - left.push_back(*arg); - } - - return true; - }); - - myArgs.parseCmdline(args); - - if (packages && fromArgs) { - throw UsageError("'-p' and '-E' are mutually exclusive"); - } - - auto store = openStore(); - - auto state = std::make_unique<EvalState>(myArgs.searchPath, store); - state->repair = repair; - - std::unique_ptr<Bindings> autoArgs = myArgs.getAutoArgs(*state); - - if (packages) { - std::ostringstream joined; - // TODO(grfn): Generate a syntax tree here, not a string - joined << "with import <nixpkgs> { }; (pkgs.runCommandCC or " - "pkgs.runCommand) \"shell\" { buildInputs = [ "; - for (const auto& i : left) { - joined << '(' << i << ") "; - } - joined << "]; } \"\""; - fromArgs = true; - left = {joined.str()}; - } else if (!fromArgs) { - if (left.empty() && runEnv && pathExists("shell.nix")) { - left = {"shell.nix"}; - } - if (left.empty()) { - left = {"default.nix"}; - } - } - - if (runEnv) { - setenv("IN_NIX_SHELL", pure ? "pure" : "impure", 1); - } - - DrvInfos drvs; - - /* Parse the expressions. */ - std::vector<Expr*> exprs; - - if (readStdin) { - exprs = {state->parseStdin()}; - } else { - for (const auto& i : left) { - if (fromArgs) { - exprs.push_back(state->parseExprFromString(i, absPath("."))); - } else { - auto absolute = i; - try { - absolute = canonPath(absPath(i), true); - } catch (Error& e) { - }; - if (store->isStorePath(absolute) && - std::regex_match(absolute, std::regex(".*\\.drv(!.*)?"))) { - drvs.push_back(DrvInfo(*state, store, absolute)); - } else { - /* If we're in a #! script, interpret filenames - relative to the script. */ - exprs.push_back( - state->parseExprFromFile(resolveExprPath(state->checkSourcePath( - lookupFileArg(*state, inShebang && !packages - ? absPath(i, absPath(dirOf(script))) - : i))))); - } - } - } - } - - /* Evaluate them into derivations. */ - if (attrPaths.empty()) { - attrPaths = {""}; - } - - for (auto e : exprs) { - Value vRoot; - state->eval(e, vRoot); - - for (auto& i : attrPaths) { - Value& v(*findAlongAttrPath(*state, i, autoArgs.get(), vRoot)); - state->forceValue(v); - getDerivations(*state, v, "", autoArgs.get(), drvs, false); - } - } - - state->printStats(); - - auto buildPaths = [&](const PathSet& paths) { - /* Note: we do this even when !printMissing to efficiently - fetch binary cache data. */ - unsigned long long downloadSize; - unsigned long long narSize; - PathSet willBuild; - PathSet willSubstitute; - PathSet unknown; - store->queryMissing(paths, willBuild, willSubstitute, unknown, downloadSize, - narSize); - - if (settings.printMissing) { - printMissing(ref<Store>(store), willBuild, willSubstitute, unknown, - downloadSize, narSize); - } - - if (!dryRun) { - util::OkOrThrow(store->buildPaths(std::cerr, paths, buildMode)); - } - }; - - if (runEnv) { - if (drvs.size() != 1) { - throw UsageError("nix-shell requires a single derivation"); - } - - auto& drvInfo = drvs.front(); - auto drv = store->derivationFromPath(drvInfo.queryDrvPath()); - - PathSet pathsToBuild; - - /* Figure out what bash shell to use. If $NIX_BUILD_SHELL - is not set, then build bashInteractive from - <nixpkgs>. */ - auto opt_shell = getEnv("NIX_BUILD_SHELL"); - std::string shell; - - if (opt_shell.has_value()) { - shell = opt_shell.value(); - } else { - try { - auto expr = state->parseExprFromString( - "(import <nixpkgs> {}).bashInteractive", absPath(".")); - - Value v; - state->eval(expr, v); - - auto drv = getDerivation(*state, v, false); - if (!drv) { - throw Error( - "the 'bashInteractive' attribute in <nixpkgs> did not evaluate " - "to a derivation"); - } - - pathsToBuild.insert(drv->queryDrvPath()); - - shell = drv->queryOutPath() + "/bin/bash"; - - } catch (Error& e) { - LOG(WARNING) << e.what() << "; will use bash from your environment"; - shell = "bash"; - } - } - - // Build or fetch all dependencies of the derivation. - for (const auto& input : drv.inputDrvs) { - if (std::all_of(envExclude.cbegin(), envExclude.cend(), - [&](const std::string& exclude) { - return !std::regex_search(input.first, - std::regex(exclude)); - })) { - pathsToBuild.insert(makeDrvPathWithOutputs(input.first, input.second)); - } - } - for (const auto& src : drv.inputSrcs) { - pathsToBuild.insert(src); - } - - buildPaths(pathsToBuild); - - if (dryRun) { - return; - } - - // Set the environment. - auto env = getEnv(); - - auto tmp = - getEnv("TMPDIR").value_or(getEnv("XDG_RUNTIME_DIR").value_or("/tmp")); - - if (pure) { - decltype(env) newEnv; - for (auto& i : env) { - if (keepVars.count(i.first) != 0u) { - newEnv.emplace(i); - } - } - env = newEnv; - // NixOS hack: prevent /etc/bashrc from sourcing /etc/profile. - env["__ETC_PROFILE_SOURCED"] = "1"; - } - - env["NIX_BUILD_TOP"] = env["TMPDIR"] = env["TEMPDIR"] = env["TMP"] = - env["TEMP"] = tmp; - env["NIX_STORE"] = store->storeDir; - env["NIX_BUILD_CORES"] = std::to_string(settings.buildCores); - - StringSet passAsFile = - absl::StrSplit(get(drv.env, "passAsFile", ""), - absl::ByAnyChar(" \t\n\r"), absl::SkipEmpty()); - - bool keepTmp = false; - int fileNr = 0; - - for (auto& var : drv.env) { - if (passAsFile.count(var.first) != 0u) { - keepTmp = true; - std::string fn = ".attr-" + std::to_string(fileNr++); - Path p = Path(tmpDir) + "/" + fn; - writeFile(p, var.second); - env[var.first + "Path"] = p; - } else { - env[var.first] = var.second; - } - } - - restoreAffinity(); - - /* Run a shell using the derivation's environment. For - convenience, source $stdenv/setup to setup additional - environment variables and shell functions. Also don't - lose the current $PATH directories. */ - auto rcfile = Path(tmpDir) + "/rc"; - writeFile( - rcfile, - fmt((keepTmp ? "" : "rm -rf '%1%'; "s) + - "[ -n \"$PS1\" ] && [ -e ~/.bashrc ] && source ~/.bashrc; " - "%2%" - "dontAddDisableDepTrack=1; " - "[ -e $stdenv/setup ] && source $stdenv/setup; " - "%3%" - "PATH=\"%4%:$PATH\"; " - "SHELL=%5%; " - "set +e; " - R"s([ -n "$PS1" ] && PS1='\n\[\033[1;32m\][nix-shell:\w]\$\[\033[0m\] '; )s" - "if [ \"$(type -t runHook)\" = function ]; then runHook " - "shellHook; fi; " - "unset NIX_ENFORCE_PURITY; " - "shopt -u nullglob; " - "unset TZ; %6%" - "%7%", - Path(tmpDir), (pure ? "" : "p=$PATH; "), - (pure ? "" : "PATH=$PATH:$p; unset p; "), dirOf(shell), shell, - (getenv("TZ") != nullptr - ? (std::string("export TZ='") + getenv("TZ") + "'; ") - : ""), - envCommand)); - - Strings envStrs; - for (auto& i : env) { - envStrs.push_back(i.first + "=" + i.second); - } - - auto args = interactive ? Strings{"bash", "--rcfile", rcfile} - : Strings{"bash", rcfile}; - - auto envPtrs = stringsToCharPtrs(envStrs); - - environ = envPtrs.data(); - - auto argPtrs = stringsToCharPtrs(args); - - restoreSignals(); - - execvp(shell.c_str(), argPtrs.data()); - - throw SysError("executing shell '%s'", shell); - } - - PathSet pathsToBuild; - - std::map<Path, Path> drvPrefixes; - std::map<Path, Path> resultSymlinks; - std::vector<Path> outPaths; - - for (auto& drvInfo : drvs) { - auto drvPath = drvInfo.queryDrvPath(); - auto outPath = drvInfo.queryOutPath(); - - auto outputName = drvInfo.queryOutputName(); - if (outputName.empty()) { - throw Error("derivation '%s' lacks an 'outputName' attribute", drvPath); - } - - pathsToBuild.insert(drvPath + "!" + outputName); - - std::string drvPrefix; - auto i = drvPrefixes.find(drvPath); - if (i != drvPrefixes.end()) { - drvPrefix = i->second; - } else { - drvPrefix = outLink; - if (!drvPrefixes.empty() != 0u) { - drvPrefix += fmt("-%d", drvPrefixes.size() + 1); - } - drvPrefixes[drvPath] = drvPrefix; - } - - std::string symlink = drvPrefix; - if (outputName != "out") { - symlink += "-" + outputName; - } - - resultSymlinks[symlink] = outPath; - outPaths.push_back(outPath); - } - - buildPaths(pathsToBuild); - - if (dryRun) { - return; - } - - for (auto& symlink : resultSymlinks) { - if (auto store2 = store.dynamic_pointer_cast<LocalFSStore>()) { - store2->addPermRoot(symlink.second, absPath(symlink.first), true); - } - } - - for (auto& path : outPaths) { - std::cout << path << '\n'; - } -} - -static RegisterLegacyCommand s1("nix-build", _main); -static RegisterLegacyCommand s2("nix-shell", _main); |