pennae
6526d1676b
Pos objects are somewhat wasteful as they duplicate the origin file name and input type for each object. on files that produce more than one Pos when parsed this a sizeable waste of memory (one pointer per Pos). the same goes for ptr<Pos> on 64 bit machines: parsing enough source to require 8 bytes to locate a position would need at least 8GB of input and 64GB of expression memory. it's not likely that we'll hit that any time soon, so we can use a uint32_t index to locate positions instead.
125 lines
3.9 KiB
C++
125 lines
3.9 KiB
C++
#include "command.hh"
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#include "common-args.hh"
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#include "shared.hh"
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#include "store-api.hh"
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#include "local-fs-store.hh"
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#include "fs-accessor.hh"
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using namespace nix;
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struct CmdBundle : InstallableCommand
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{
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std::string bundler = "github:NixOS/bundlers";
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std::optional<Path> outLink;
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CmdBundle()
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{
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addFlag({
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.longName = "bundler",
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.description = fmt("Use a custom bundler instead of the default (`%s`).", bundler),
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.labels = {"flake-url"},
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.handler = {&bundler},
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.completer = {[&](size_t, std::string_view prefix) {
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completeFlakeRef(getStore(), prefix);
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}}
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});
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addFlag({
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.longName = "out-link",
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.shortName = 'o',
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.description = "Override the name of the symlink to the build result. It defaults to the base name of the app.",
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.labels = {"path"},
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.handler = {&outLink},
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.completer = completePath
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});
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}
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std::string description() override
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{
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return "bundle an application so that it works outside of the Nix store";
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}
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std::string doc() override
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{
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return
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#include "bundle.md"
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;
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}
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Category category() override { return catSecondary; }
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// FIXME: cut&paste from CmdRun.
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Strings getDefaultFlakeAttrPaths() override
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{
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Strings res{
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"apps." + settings.thisSystem.get() + ".default",
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"defaultApp." + settings.thisSystem.get()
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};
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for (auto & s : SourceExprCommand::getDefaultFlakeAttrPaths())
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res.push_back(s);
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return res;
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}
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Strings getDefaultFlakeAttrPathPrefixes() override
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{
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Strings res{"apps." + settings.thisSystem.get() + "."};
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for (auto & s : SourceExprCommand::getDefaultFlakeAttrPathPrefixes())
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res.push_back(s);
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return res;
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}
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void run(ref<Store> store) override
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{
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auto evalState = getEvalState();
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auto val = installable->toValue(*evalState).first;
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auto [bundlerFlakeRef, bundlerName] = parseFlakeRefWithFragment(bundler, absPath("."));
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const flake::LockFlags lockFlags{ .writeLockFile = false };
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InstallableFlake bundler{this,
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evalState, std::move(bundlerFlakeRef), bundlerName,
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{"bundlers." + settings.thisSystem.get() + ".default",
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"defaultBundler." + settings.thisSystem.get()
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},
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{"bundlers." + settings.thisSystem.get() + "."},
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lockFlags
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};
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auto vRes = evalState->allocValue();
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evalState->callFunction(*bundler.toValue(*evalState).first, *val, *vRes, noPos);
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if (!evalState->isDerivation(*vRes))
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throw Error("the bundler '%s' does not produce a derivation", bundler.what());
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auto attr1 = vRes->attrs->get(evalState->sDrvPath);
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if (!attr1)
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throw Error("the bundler '%s' does not produce a derivation", bundler.what());
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PathSet context2;
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auto drvPath = evalState->coerceToStorePath(attr1->pos, *attr1->value, context2);
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auto attr2 = vRes->attrs->get(evalState->sOutPath);
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if (!attr2)
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throw Error("the bundler '%s' does not produce a derivation", bundler.what());
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auto outPath = evalState->coerceToStorePath(attr2->pos, *attr2->value, context2);
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store->buildPaths({ DerivedPath::Built { drvPath } });
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auto outPathS = store->printStorePath(outPath);
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if (!outLink) {
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auto * attr = vRes->attrs->get(evalState->sName);
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if (!attr)
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throw Error("attribute 'name' missing");
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outLink = evalState->forceStringNoCtx(*attr->value, attr->pos);
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}
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// TODO: will crash if not a localFSStore?
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store.dynamic_pointer_cast<LocalFSStore>()->addPermRoot(outPath, absPath(*outLink));
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}
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};
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static auto r2 = registerCommand<CmdBundle>("bundle");
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