forked from lix-project/lix
nix dev-shell: Refactor script for getting the environment
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8
src/nix/get-env.sh
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8
src/nix/get-env.sh
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@ -0,0 +1,8 @@
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set -e
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export IN_NIX_SHELL=impure
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export dontAddDisableDepTrack=1
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if [[ -n $stdenv ]]; then
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source $stdenv/setup
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fi
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export > $out
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set >> $out
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@ -27,3 +27,5 @@ $(foreach name, \
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$(eval $(call install-symlink, $(bindir)/nix, $(libexecdir)/nix/build-remote))
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src/nix-env/user-env.cc: src/nix-env/buildenv.nix.gen.hh
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src/nix/shell.cc: src/nix/get-env.sh.gen.hh
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@ -83,6 +83,10 @@ BuildEnvironment readEnvironment(const Path & path)
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return res;
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}
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const static std::string getEnvSh =
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#include "get-env.sh.gen.hh"
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;
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/* Given an existing derivation, return the shell environment as
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initialised by stdenv's setup script. We do this by building a
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modified derivation with the same dependencies and nearly the same
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@ -94,16 +98,9 @@ StorePath getDerivationEnvironment(ref<Store> store, Derivation drv)
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if (builder != "bash")
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throw Error("'nix dev-shell' only works on derivations that use 'bash' as their builder");
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drv.args = {
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"-c",
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"set -e; "
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"export IN_NIX_SHELL=impure; "
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"export dontAddDisableDepTrack=1; "
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"if [[ -n $stdenv ]]; then "
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" source $stdenv/setup; "
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"fi; "
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"export > $out; "
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"set >> $out "};
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auto getEnvShPath = store->addTextToStore("get-env.sh", getEnvSh, {});
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drv.args = {store->printStorePath(getEnvShPath)};
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/* Remove derivation checks. */
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drv.env.erase("allowedReferences");
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@ -120,6 +117,7 @@ StorePath getDerivationEnvironment(ref<Store> store, Derivation drv)
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drv.env.erase(output.first);
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drv.env["out"] = "";
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drv.env["outputs"] = "out";
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drv.inputSrcs.insert(std::move(getEnvShPath));
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Hash h = hashDerivationModulo(*store, drv, true);
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auto shellOutPath = store->makeOutputPath("out", h, drvName);
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drv.outputs.insert_or_assign("out", DerivationOutput(shellOutPath.clone(), "", ""));
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