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Merge pull request #7744 from obsidiansystems/split-installable-store-path

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Factor out `InstallableStorePath` to its own file, dedup
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tomberek 2023-02-13 08:57:19 -05:00 • committed by GitHub
commit 601faa00d7
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4 changed files with 104 additions and 91 deletions
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70
src/libcmd/installables.cc
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@ -1,5 +1,6 @@
#include "globals.hh"
#include "installables.hh"
#include "installable-derived-path.hh"
#include "outputs-spec.hh"
#include "util.hh"
#include "command.hh"
@ -389,38 +390,6 @@ static StorePath getDeriver(
return *derivers.begin();
}
struct InstallableStorePath : Installable
{
ref<Store> store;
DerivedPath req;
InstallableStorePath(ref<Store> store, DerivedPath && req)
: store(store), req(std::move(req))
{ }
std::string what() const override
{
return req.to_string(*store);
}
DerivedPathsWithInfo toDerivedPaths() override
{
return {{.path = req, .info = {} }};
}
std::optional<StorePath> getStorePath() override
{
return std::visit(overloaded {
[&](const DerivedPath::Built & bfd) {
return bfd.drvPath;
},
[&](const DerivedPath::Opaque & bo) {
return bo.path;
},
}, req.raw());
}
};
struct InstallableAttrPath : InstallableValue
{
SourceExprCommand & cmd;
@ -785,41 +754,10 @@ std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
auto prefix = std::move(prefix_);
auto extendedOutputsSpec = std::move(extendedOutputsSpec_);
auto found = prefix.find('/');
if (found != std::string::npos) {
if (prefix.find('/') != std::string::npos) {
try {
auto derivedPath = std::visit(overloaded {
// If the user did not use ^, we treat the output more liberally.
[&](const ExtendedOutputsSpec::Default &) -> DerivedPath {
// First, we accept a symlink chain or an actual store path.
auto storePath = store->followLinksToStorePath(prefix);
// Second, we see if the store path ends in `.drv` to decide what sort
// of derived path they want.
//
// This handling predates the `^` syntax. The `^*` in
// `/nix/store/hash-foo.drv^*` unambiguously means "do the
// `DerivedPath::Built` case", so plain `/nix/store/hash-foo.drv` could
// also unambiguously mean "do the DerivedPath::Opaque` case".
//
// Issue #7261 tracks reconsidering this `.drv` dispatching.
return storePath.isDerivation()
? (DerivedPath) DerivedPath::Built {
.drvPath = std::move(storePath),
.outputs = OutputsSpec::All {},
}
: (DerivedPath) DerivedPath::Opaque {
.path = std::move(storePath),
};
},
// If the user did use ^, we just do exactly what is written.
[&](const ExtendedOutputsSpec::Explicit & outputSpec) -> DerivedPath {
return DerivedPath::Built {
.drvPath = store->parseStorePath(prefix),
.outputs = outputSpec,
};
},
}, extendedOutputsSpec.raw());
result.push_back(std::make_shared<InstallableStorePath>(store, std::move(derivedPath)));
result.push_back(std::make_shared<InstallableDerivedPath>(
InstallableDerivedPath::parse(store, prefix, extendedOutputsSpec)));
continue;
} catch (BadStorePath &) {
} catch (...) {