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nix develop: do not assume that saved vars are set

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This fixes https://github.com/NixOS/nix/issues/6809
This commit is contained in:
Jeremy Fleischman 2022-07-14 23:11:02 -07:00
parent de287964d5
commit 04386f7d69
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1 changed files with 3 additions and 1 deletions
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4
src/nix/develop.cc
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@ -288,8 +288,10 @@ struct Common : InstallableCommand, MixProfile
out << "unset shellHook\n"; out << "unset shellHook\n";
for (auto & var : savedVars) for (auto & var : savedVars) {
out << fmt("%s=${%s:-}\n", var, var);
out << fmt("nix_saved_%s=\"$%s\"\n", var, var); out << fmt("nix_saved_%s=\"$%s\"\n", var, var);
}
buildEnvironment.toBash(out, ignoreVars); buildEnvironment.toBash(out, ignoreVars);