1 files changed, 109 insertions, 0 deletions
diff --git a/src/libcmd/installable-attr-path.cc b/src/libcmd/installable-attr-path.cc
new file mode 100644
index 000000000..d9377f0d6
--- /dev/null
+++ b/src/libcmd/installable-attr-path.cc
@@ -0,0 +1,109 @@
+#include "globals.hh"
+#include "installable-attr-path.hh"
+#include "outputs-spec.hh"
+#include "util.hh"
+#include "command.hh"
+#include "attr-path.hh"
+#include "common-eval-args.hh"
+#include "derivations.hh"
+#include "eval-inline.hh"
+#include "eval.hh"
+#include "get-drvs.hh"
+#include "store-api.hh"
+#include "shared.hh"
+#include "flake/flake.hh"
+#include "eval-cache.hh"
+#include "url.hh"
+#include "registry.hh"
+#include "build-result.hh"
+
+#include <regex>
+#include <queue>
+
+#include <nlohmann/json.hpp>
+
+namespace nix {
+
+InstallableAttrPath::InstallableAttrPath(
+    ref<EvalState> state,
+    SourceExprCommand & cmd,
+    Value * v,
+    const std::string & attrPath,
+    ExtendedOutputsSpec extendedOutputsSpec)
+    : InstallableValue(state)
+    , cmd(cmd)
+    , v(allocRootValue(v))
+    , attrPath(attrPath)
+    , extendedOutputsSpec(std::move(extendedOutputsSpec))
+{ }
+
+std::pair<Value *, PosIdx> InstallableAttrPath::toValue(EvalState & state)
+{
+    auto [vRes, pos] = findAlongAttrPath(state, attrPath, *cmd.getAutoArgs(state), **v);
+    state.forceValue(*vRes, pos);
+    return {vRes, pos};
+}
+
+DerivedPathsWithInfo InstallableAttrPath::toDerivedPaths()
+{
+    auto v = toValue(*state).first;
+
+    Bindings & autoArgs = *cmd.getAutoArgs(*state);
+
+    DrvInfos drvInfos;
+    getDerivations(*state, *v, "", autoArgs, drvInfos, false);
+
+    // Backward compatibility hack: group results by drvPath. This
+    // helps keep .all output together.
+    std::map<StorePath, OutputsSpec> byDrvPath;
+
+    for (auto & drvInfo : drvInfos) {
+        auto drvPath = drvInfo.queryDrvPath();
+        if (!drvPath)
+            throw Error("'%s' is not a derivation", what());
+
+        auto newOutputs = std::visit(overloaded {
+            [&](const ExtendedOutputsSpec::Default & d) -> OutputsSpec {
+                std::set<std::string> outputsToInstall;
+                for (auto & output : drvInfo.queryOutputs(false, true))
+                    outputsToInstall.insert(output.first);
+                return OutputsSpec::Names { std::move(outputsToInstall) };
+            },
+            [&](const ExtendedOutputsSpec::Explicit & e) -> OutputsSpec {
+                return e;
+            },
+        }, extendedOutputsSpec.raw());
+
+        auto [iter, didInsert] = byDrvPath.emplace(*drvPath, newOutputs);
+
+        if (!didInsert)
+            iter->second = iter->second.union_(newOutputs);
+    }
+
+    DerivedPathsWithInfo res;
+    for (auto & [drvPath, outputs] : byDrvPath)
+        res.push_back({
+            .path = DerivedPath::Built {
+                .drvPath = drvPath,
+                .outputs = outputs,
+            },
+        });
+
+    return res;
+}
+
+InstallableAttrPath InstallableAttrPath::parse(
+    ref<EvalState> state,
+    SourceExprCommand & cmd,
+    Value * v,
+    std::string_view prefix,
+    ExtendedOutputsSpec extendedOutputsSpec)
+{
+    return {
+        state, cmd, v,
+        prefix == "." ? "" : std::string { prefix },
+        extendedOutputsSpec
+    };
+}
+
+}