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78 lines
2.4 KiB
Nix
78 lines
2.4 KiB
Nix
# This function downloads and unpacks an archive file, such as a zip
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# or tar file. This is primarily useful for dynamically generated
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# archives, such as GitHub's /archive URLs, where the unpacked content
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# of the zip file doesn't change, but the zip file itself may
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# (e.g. due to minor changes in the compression algorithm, or changes
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# in timestamps).
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{ lib, fetchurl, unzip, glibcLocalesUtf8 }:
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{ name ? "source"
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, url ? ""
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, urls ? []
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, nativeBuildInputs ? []
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, postFetch ? ""
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, extraPostFetch ? ""
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# Optionally move the contents of the unpacked tree up one level.
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, stripRoot ? true
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# Allows to set the extension for the intermediate downloaded
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# file. This can be used as a hint for the unpackCmdHooks to select
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# an appropriate unpacking tool.
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, extension ? null
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# the rest are given to fetchurl as is
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, ... } @ args:
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assert (extraPostFetch != "") -> lib.warn "use 'postFetch' instead of 'extraPostFetch' with 'fetchzip' and 'fetchFromGitHub'." true;
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let
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tmpFilename =
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if extension != null
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then "download.${extension}"
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else baseNameOf (if url != "" then url else builtins.head urls);
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in
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fetchurl ({
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inherit name;
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recursiveHash = true;
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downloadToTemp = true;
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# Have to pull in glibcLocalesUtf8 for unzip in setup-hook.sh to handle
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# UTF-8 aware locale:
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# https://github.com/NixOS/nixpkgs/issues/176225#issuecomment-1146617263
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nativeBuildInputs = [ unzip glibcLocalesUtf8 ] ++ nativeBuildInputs;
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postFetch =
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''
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unpackDir="$TMPDIR/unpack"
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mkdir "$unpackDir"
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cd "$unpackDir"
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renamed="$TMPDIR/${tmpFilename}"
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mv "$downloadedFile" "$renamed"
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unpackFile "$renamed"
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chmod -R +w "$unpackDir"
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'' + (if stripRoot then ''
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if [ $(ls -A "$unpackDir" | wc -l) != 1 ]; then
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echo "error: zip file must contain a single file or directory."
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echo "hint: Pass stripRoot=false; to fetchzip to assume flat list of files."
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exit 1
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fi
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fn=$(cd "$unpackDir" && ls -A)
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if [ -f "$unpackDir/$fn" ]; then
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mkdir $out
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fi
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mv "$unpackDir/$fn" "$out"
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'' else ''
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mv "$unpackDir" "$out"
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'') + ''
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${postFetch}
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${extraPostFetch}
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chmod 755 "$out"
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'';
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# ^ Remove non-owner write permissions
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# Fixes https://github.com/NixOS/nixpkgs/issues/38649
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} // removeAttrs args [ "stripRoot" "extraPostFetch" "postFetch" "extension" "nativeBuildInputs" ])
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