forked from mirrors/nixpkgs
d2df553da1
Comes in handy if we want to make additional modificiations to the output file. While I wasn't sure whether to invoke the passed postFetch directly before the patch or afterwards, I thought it would be better afterwards because "postFetch of fetchpatch" at least to my intuition would sound that after whatever "fetchpatch" does - it comes afterwards. Signed-off-by: aszlig <aszlig@redmoonstudios.org>
24 lines
764 B
Nix
24 lines
764 B
Nix
# This function downloads and normalizes a patch/diff file.
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# This is primarily useful for dynamically generated patches,
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# such as GitHub's or cgit's, where the non-significant content parts
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# often change with updating of git or cgit.
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# stripLen acts as the -p parameter when applying a patch.
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{ fetchurl, patchutils }:
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{ stripLen ? 0, ... }@args:
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fetchurl ({
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postFetch = ''
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tmpfile="$TMPDIR/${args.sha256}"
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"${patchutils}/bin/lsdiff" "$out" \
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| sort -u | sed -e 's/[*?]/\\&/g' \
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| xargs -I{} \
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"${patchutils}/bin/filterdiff" \
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--include={} \
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--strip=${toString stripLen} \
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--clean "$out" > "$tmpfile"
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mv "$tmpfile" "$out"
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${args.postFetch or ""}
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'';
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} // builtins.removeAttrs args ["stripLen"])
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