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231d5b41ed
This matches what we just did for `nix path-info`, and I hope will allow
us to avoiding any more breaking changes to this command for the
foreseeable future.
(cherry picked from commit 0f18076f3a)
35 lines
865 B
Nix
35 lines
865 B
Nix
with import ./config.nix;
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let
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innerName = "foo";
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in
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mkDerivation rec {
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name = "${innerName}.drv";
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SHELL = shell;
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requiredSystemFeatures = [ "recursive-nix" ];
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drv = builtins.unsafeDiscardOutputDependency (import ./text-hashed-output.nix).hello.drvPath;
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buildCommand = ''
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export NIX_CONFIG='experimental-features = nix-command ca-derivations'
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PATH=${builtins.getEnv "EXTRA_PATH"}:$PATH
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# JSON of pre-existing drv
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nix derivation show $drv | jq '.derivations[]' > drv0.json
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# Fix name
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jq < drv0.json '.name = "${innerName}"' > drv1.json
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# Extend `buildCommand`
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jq < drv1.json '.env.buildCommand += "echo \"I am alive!\" >> $out/hello\n"' > drv0.json
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# Used as our output
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cp $(nix derivation add < drv0.json) $out
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'';
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__contentAddressed = true;
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outputHashMode = "text";
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outputHashAlgo = "sha256";
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}
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