forked from lix-project/lix
Factor out InstallableStorePath to its own file, dedup
`nix app` had something called `InstallableDerivedPath` which is actually the same thing. We go with the later's name because it has become more correct. I originally did this change (more hurriedly) as part of #6225 --- a mini store-only Nix and a full Nix need to share this code. In the first RFC meeting for https://github.com/NixOS/rfcs/pull/134 we discussed how some splitting of the massive `installables.cc` could begin prior, as that is a good thing anyways. (@edolstra's words, not mine!) This would be one such PR.
This commit is contained in:
John Ericson
parent
dbe0748f97
commit
45fa297e40
70
src/libcmd/installable-derived-path.cc
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70
src/libcmd/installable-derived-path.cc
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@ -0,0 +1,70 @@
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#include "installable-derived-path.hh"
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#include "derivations.hh"
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namespace nix {
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std::string InstallableDerivedPath::what() const
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{
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return derivedPath.to_string(*store);
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}
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DerivedPathsWithInfo InstallableDerivedPath::toDerivedPaths()
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{
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return {{.path = derivedPath, .info = {} }};
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}
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std::optional<StorePath> InstallableDerivedPath::getStorePath()
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{
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return std::visit(overloaded {
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[&](const DerivedPath::Built & bfd) {
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return bfd.drvPath;
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},
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[&](const DerivedPath::Opaque & bo) {
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return bo.path;
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},
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}, derivedPath.raw());
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}
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InstallableDerivedPath InstallableDerivedPath::parse(
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ref<Store> store,
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std::string_view prefix,
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ExtendedOutputsSpec extendedOutputsSpec)
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{
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auto derivedPath = std::visit(overloaded {
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// If the user did not use ^, we treat the output more liberally.
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[&](const ExtendedOutputsSpec::Default &) -> DerivedPath {
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// First, we accept a symlink chain or an actual store path.
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auto storePath = store->followLinksToStorePath(prefix);
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// Second, we see if the store path ends in `.drv` to decide what sort
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// of derived path they want.
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//
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// This handling predates the `^` syntax. The `^*` in
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// `/nix/store/hash-foo.drv^*` unambiguously means "do the
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// `DerivedPath::Built` case", so plain `/nix/store/hash-foo.drv` could
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// also unambiguously mean "do the DerivedPath::Opaque` case".
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//
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// Issue #7261 tracks reconsidering this `.drv` dispatching.
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return storePath.isDerivation()
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? (DerivedPath) DerivedPath::Built {
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.drvPath = std::move(storePath),
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.outputs = OutputsSpec::All {},
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}
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: (DerivedPath) DerivedPath::Opaque {
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.path = std::move(storePath),
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};
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},
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// If the user did use ^, we just do exactly what is written.
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[&](const ExtendedOutputsSpec::Explicit & outputSpec) -> DerivedPath {
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return DerivedPath::Built {
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.drvPath = store->parseStorePath(prefix),
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.outputs = outputSpec,
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};
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},
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}, extendedOutputsSpec.raw());
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return InstallableDerivedPath {
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store,
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std::move(derivedPath),
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};
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}
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}
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28
src/libcmd/installable-derived-path.hh
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28
src/libcmd/installable-derived-path.hh
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@ -0,0 +1,28 @@
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#pragma once
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#include "installables.hh"
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namespace nix {
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struct InstallableDerivedPath : Installable
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{
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ref<Store> store;
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DerivedPath derivedPath;
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InstallableDerivedPath(ref<Store> store, DerivedPath && derivedPath)
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: store(store), derivedPath(std::move(derivedPath))
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{ }
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std::string what() const override;
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DerivedPathsWithInfo toDerivedPaths() override;
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std::optional<StorePath> getStorePath() override;
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static InstallableDerivedPath parse(
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ref<Store> store,
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std::string_view prefix,
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ExtendedOutputsSpec extendedOutputsSpec);
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};
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}
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@ -1,5 +1,6 @@
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#include "globals.hh"
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#include "installables.hh"
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#include "installable-derived-path.hh"
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#include "outputs-spec.hh"
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#include "util.hh"
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#include "command.hh"
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@ -396,38 +397,6 @@ static StorePath getDeriver(
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return *derivers.begin();
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}
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struct InstallableStorePath : Installable
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{
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ref<Store> store;
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DerivedPath req;
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InstallableStorePath(ref<Store> store, DerivedPath && req)
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: store(store), req(std::move(req))
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{ }
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std::string what() const override
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{
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return req.to_string(*store);
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}
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DerivedPathsWithInfo toDerivedPaths() override
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{
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return {{.path = req, .info = {} }};
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}
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std::optional<StorePath> getStorePath() override
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{
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return std::visit(overloaded {
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[&](const DerivedPath::Built & bfd) {
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return bfd.drvPath;
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},
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[&](const DerivedPath::Opaque & bo) {
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return bo.path;
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},
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}, req.raw());
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}
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};
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struct InstallableAttrPath : InstallableValue
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{
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SourceExprCommand & cmd;
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@ -792,41 +761,10 @@ std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
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auto prefix = std::move(prefix_);
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auto extendedOutputsSpec = std::move(extendedOutputsSpec_);
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auto found = prefix.find('/');
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if (found != std::string::npos) {
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if (prefix.find('/') != std::string::npos) {
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try {
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auto derivedPath = std::visit(overloaded {
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// If the user did not use ^, we treat the output more liberally.
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[&](const ExtendedOutputsSpec::Default &) -> DerivedPath {
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// First, we accept a symlink chain or an actual store path.
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auto storePath = store->followLinksToStorePath(prefix);
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// Second, we see if the store path ends in `.drv` to decide what sort
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// of derived path they want.
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//
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// This handling predates the `^` syntax. The `^*` in
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// `/nix/store/hash-foo.drv^*` unambiguously means "do the
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// `DerivedPath::Built` case", so plain `/nix/store/hash-foo.drv` could
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// also unambiguously mean "do the DerivedPath::Opaque` case".
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//
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// Issue #7261 tracks reconsidering this `.drv` dispatching.
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return storePath.isDerivation()
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? (DerivedPath) DerivedPath::Built {
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.drvPath = std::move(storePath),
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.outputs = OutputsSpec::All {},
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}
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: (DerivedPath) DerivedPath::Opaque {
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.path = std::move(storePath),
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};
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},
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// If the user did use ^, we just do exactly what is written.
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[&](const ExtendedOutputsSpec::Explicit & outputSpec) -> DerivedPath {
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return DerivedPath::Built {
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.drvPath = store->parseStorePath(prefix),
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.outputs = outputSpec,
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};
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},
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}, extendedOutputsSpec.raw());
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result.push_back(std::make_shared<InstallableStorePath>(store, std::move(derivedPath)));
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result.push_back(std::make_shared<InstallableDerivedPath>(
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InstallableDerivedPath::parse(store, prefix, extendedOutputsSpec)));
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continue;
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} catch (BadStorePath &) {
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} catch (...) {
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@ -1,4 +1,5 @@
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#include "installables.hh"
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#include "installable-derived-path.hh"
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#include "store-api.hh"
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#include "eval-inline.hh"
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#include "eval-cache.hh"
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@ -8,30 +9,6 @@
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namespace nix {
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struct InstallableDerivedPath : Installable
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{
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ref<Store> store;
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const DerivedPath derivedPath;
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InstallableDerivedPath(ref<Store> store, const DerivedPath & derivedPath)
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: store(store)
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, derivedPath(derivedPath)
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{
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}
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std::string what() const override { return derivedPath.to_string(*store); }
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DerivedPathsWithInfo toDerivedPaths() override
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{
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return {{derivedPath}};
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}
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std::optional<StorePath> getStorePath() override
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{
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return std::nullopt;
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}
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};
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/**
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* Return the rewrites that are needed to resolve a string whose context is
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* included in `dependencies`.
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@ -146,7 +123,7 @@ App UnresolvedApp::resolve(ref<Store> evalStore, ref<Store> store)
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for (auto & ctxElt : unresolved.context)
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installableContext.push_back(
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std::make_shared<InstallableDerivedPath>(store, ctxElt));
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std::make_shared<InstallableDerivedPath>(store, DerivedPath { ctxElt }));
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auto builtContext = Installable::build(evalStore, store, Realise::Outputs, installableContext);
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res.program = resolveString(*store, unresolved.program, builtContext);
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