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`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.
70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
#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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