lix/src/nix/bundle.cc

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#include "command.hh"
#include "common-args.hh"
#include "shared.hh"
#include "store-api.hh"
#include "fs-accessor.hh"
using namespace nix;
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struct CmdBundle : InstallableCommand
{
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std::string bundler = "github:matthewbauer/nix-bundle";
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std::optional<Path> outLink;
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CmdBundle()
{
addFlag({
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.longName = "bundler",
.description = "use custom bundler",
.labels = {"flake-url"},
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.handler = {&bundler},
.completer = {[&](size_t, std::string_view prefix) {
completeFlakeRef(getStore(), prefix);
}}
});
addFlag({
.longName = "out-link",
.shortName = 'o',
.description = "path of the symlink to the build result",
.labels = {"path"},
.handler = {&outLink},
.completer = completePath
});
}
std::string description() override
{
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return "bundle an application so that it works outside of the Nix store";
}
Examples examples() override
{
return {
Example{
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"To bundle Hello:",
"nix bundle hello"
},
};
}
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Category category() override { return catSecondary; }
Strings getDefaultFlakeAttrPaths() override
{
Strings res{"defaultApp." + settings.thisSystem.get()};
for (auto & s : SourceExprCommand::getDefaultFlakeAttrPaths())
res.push_back(s);
return res;
}
Strings getDefaultFlakeAttrPathPrefixes() override
{
Strings res{"apps." + settings.thisSystem.get() + ".", "packages"};
for (auto & s : SourceExprCommand::getDefaultFlakeAttrPathPrefixes())
res.push_back(s);
return res;
}
void run(ref<Store> store) override
{
auto evalState = getEvalState();
auto app = installable->toApp(*evalState);
store->buildPaths(app.context);
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auto [bundlerFlakeRef, bundlerName] = parseFlakeRefWithFragment(bundler, absPath("."));
const flake::LockFlags lockFlags{ .writeLockFile = false };
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auto bundler = InstallableFlake(
evalState, std::move(bundlerFlakeRef),
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Strings{bundlerName == "" ? "defaultBundler" : bundlerName},
Strings({"bundlers."}), lockFlags);
Value * arg = evalState->allocValue();
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evalState->mkAttrs(*arg, 2);
PathSet context;
for (auto & i : app.context)
context.insert("=" + store->printStorePath(i.path));
mkString(*evalState->allocAttr(*arg, evalState->symbols.create("program")), app.program, context);
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mkString(*evalState->allocAttr(*arg, evalState->symbols.create("system")), settings.thisSystem.get());
arg->attrs->sort();
auto vRes = evalState->allocValue();
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evalState->callFunction(*bundler.toValue(*evalState).first, *arg, *vRes, noPos);
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->find(evalState->sDrvPath);
if (!attr1)
throw Error("the bundler '%s' does not produce a derivation", bundler.what());
PathSet context2;
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StorePath drvPath = store->parseStorePath(evalState->coerceToPath(*attr1->pos, *attr1->value, context2));
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auto attr2 = vRes->attrs->find(evalState->sOutPath);
if (!attr2)
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throw Error("the bundler '%s' does not produce a derivation", bundler.what());
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StorePath outPath = store->parseStorePath(evalState->coerceToPath(*attr2->pos, *attr2->value, context2));
store->buildPaths({{drvPath}});
auto outPathS = store->printStorePath(outPath);
auto info = store->queryPathInfo(outPath);
if (!info->references.empty())
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throw Error("'%s' has references; a bundler must not leave any references", outPathS);
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if (!outLink)
outLink = baseNameOf(app.program);
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store.dynamic_pointer_cast<LocalFSStore>()->addPermRoot(outPath, absPath(*outLink), true);
}
};
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static auto r2 = registerCommand<CmdBundle>("bundle");