From bcd0629c2e499788e4b3a9d6e380143a8f807419 Mon Sep 17 00:00:00 2001
From: John Ericson <John.Ericson@Obsidian.Systems>
Date: Sun, 9 Aug 2020 20:32:35 +0000
Subject: [PATCH] Remove name parameter from `writeDerivation`

The name is now stored with the derivation itself.
---
 src/libexpr/primops.cc      | 2 +-
 src/libstore/derivations.cc | 4 ++--
 src/libstore/derivations.hh | 2 +-
 src/nix/develop.cc          | 9 +++------
 4 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index 65d36ca0e..3955287b7 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -839,7 +839,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
     }
 
     /* Write the resulting term into the Nix store directory. */
-    auto drvPath = writeDerivation(state.store, drv, drvName, state.repair);
+    auto drvPath = writeDerivation(state.store, drv, state.repair);
     auto drvPathS = state.store->printStorePath(drvPath);
 
     printMsg(lvlChatty, "instantiated '%1%' -> '%2%'", drvName, drvPathS);
diff --git a/src/libstore/derivations.cc b/src/libstore/derivations.cc
index 68b081058..f7e764a80 100644
--- a/src/libstore/derivations.cc
+++ b/src/libstore/derivations.cc
@@ -62,7 +62,7 @@ bool BasicDerivation::isBuiltin() const
 
 
 StorePath writeDerivation(ref<Store> store,
-    const Derivation & drv, std::string_view name, RepairFlag repair)
+    const Derivation & drv, RepairFlag repair)
 {
     auto references = drv.inputSrcs;
     for (auto & i : drv.inputDrvs)
@@ -70,7 +70,7 @@ StorePath writeDerivation(ref<Store> store,
     /* Note that the outputs of a derivation are *not* references
        (that can be missing (of course) and should not necessarily be
        held during a garbage collection). */
-    auto suffix = std::string(name) + drvExtension;
+    auto suffix = std::string(drv.name) + drvExtension;
     auto contents = drv.unparse(*store, false);
     return settings.readOnlyMode
         ? store->computeStorePathForText(suffix, contents, references)
diff --git a/src/libstore/derivations.hh b/src/libstore/derivations.hh
index 14e0e947a..53dfc7f13 100644
--- a/src/libstore/derivations.hh
+++ b/src/libstore/derivations.hh
@@ -128,7 +128,7 @@ enum RepairFlag : bool { NoRepair = false, Repair = true };
 
 /* Write a derivation to the Nix store, and return its path. */
 StorePath writeDerivation(ref<Store> store,
-    const Derivation & drv, std::string_view name, RepairFlag repair = NoRepair);
+    const Derivation & drv, RepairFlag repair = NoRepair);
 
 /* Read a derivation from a file. */
 Derivation readDerivation(const Store & store, const Path & drvPath, std::string_view name);
diff --git a/src/nix/develop.cc b/src/nix/develop.cc
index 12658078a..434088da7 100644
--- a/src/nix/develop.cc
+++ b/src/nix/develop.cc
@@ -124,10 +124,7 @@ StorePath getDerivationEnvironment(ref<Store> store, const StorePath & drvPath)
 
     /* Rehash and write the derivation. FIXME: would be nice to use
        'buildDerivation', but that's privileged. */
-    auto drvName = std::string(drvPath.name());
-    assert(hasSuffix(drvName, ".drv"));
-    drvName.resize(drvName.size() - 4);
-    drvName += "-env";
+    drv.name += "-env";
     for (auto & output : drv.outputs)
         drv.env.erase(output.first);
     drv.outputs = {{"out", DerivationOutput { .output = DerivationOutputInputAddressed { .path = StorePath::dummy }}}};
@@ -136,12 +133,12 @@ StorePath getDerivationEnvironment(ref<Store> store, const StorePath & drvPath)
     drv.env["outputs"] = "out";
     drv.inputSrcs.insert(std::move(getEnvShPath));
     Hash h = std::get<0>(hashDerivationModulo(*store, drv, true));
-    auto shellOutPath = store->makeOutputPath("out", h, drvName);
+    auto shellOutPath = store->makeOutputPath("out", h, drv.name);
     drv.outputs.insert_or_assign("out", DerivationOutput { .output = DerivationOutputInputAddressed {
                 .path = shellOutPath
             } });
     drv.env["out"] = store->printStorePath(shellOutPath);
-    auto shellDrvPath2 = writeDerivation(store, drv, drvName);
+    auto shellDrvPath2 = writeDerivation(store, drv);
 
     /* Build the derivation. */
     store->buildPaths({{shellDrvPath2}});