stdenv/setup.sh: deal with Nix < 2.4 structured attrs
Nix does not (as far it is documented) guarantee that NIX_ATTRS_*_FILE is set, the only [documented] guarantee seems to be: > […] made available to the builder via the file .attrs.json in the > builder’s temporary directory. This guarantee is of course affected by https://github.com/NixOS/nix/issues/6736, so it seems to be prudent to fall back to the Nix 2.3 style ATTRS_*_FILE env vars before defaulting to the expected location in case neither is available. See also: - https://github.com/NixOS/nixpkgs/pull/214937#discussion_r1178101895 - https://github.com/nixos/nixpkgs/commit/afef6588e250 [documented]: https://nixos.org/manual/nix/stable/language/advanced-attributes.html#adv-attr-structuredAttrs
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@ -29,13 +29,23 @@ if [ -n "$__structuredAttrs" ]; then
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export "$outputName=${outputs[$outputName]}"
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export "$outputName=${outputs[$outputName]}"
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done
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done
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# Before Nix 2.4, $NIX_ATTRS_*_FILE was named differently:
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# https://github.com/NixOS/nix/commit/27ce722
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if [[ -n "${ATTRS_JSON_FILE:-}" ]]; then
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export NIX_ATTRS_JSON_FILE="$ATTRS_JSON_FILE"
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fi
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if [[ -n "${ATTRS_SH_FILE:-}" ]]; then
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export NIX_ATTRS_SH_FILE="$ATTRS_SH_FILE"
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fi
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# $NIX_ATTRS_JSON_FILE pointed to the wrong location in sandbox
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# $NIX_ATTRS_JSON_FILE pointed to the wrong location in sandbox
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# https://github.com/NixOS/nix/issues/6736; please keep around until the
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# https://github.com/NixOS/nix/issues/6736; please keep around until the
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# fix reaches *every patch version* that's >= lib/minver.nix
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# fix reaches *every patch version* that's >= lib/minver.nix
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if ! [[ -e "$NIX_ATTRS_JSON_FILE" ]]; then
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if ! [[ -e "${NIX_ATTRS_JSON_FILE:-}" ]]; then
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export NIX_ATTRS_JSON_FILE="$NIX_BUILD_TOP/.attrs.json"
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export NIX_ATTRS_JSON_FILE="$NIX_BUILD_TOP/.attrs.json"
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fi
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fi
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if ! [[ -e "$NIX_ATTRS_SH_FILE" ]]; then
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if ! [[ -e "${NIX_ATTRS_SH_FILE:-}" ]]; then
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export NIX_ATTRS_SH_FILE="$NIX_BUILD_TOP/.attrs.sh"
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export NIX_ATTRS_SH_FILE="$NIX_BUILD_TOP/.attrs.sh"
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fi
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fi
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else
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else
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