25 lines
680 B
Nix
25 lines
680 B
Nix
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{
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stdenv,
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}:
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{
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# If there's a need to patch external dependencies managed by Bazel
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# one option is to configure patches on Bazel level. Bazel doesn't
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# allow patches to be in absolute paths so this helper will produce
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# sources patch that adds given file to given location
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addFilePatch =
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{
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path,
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file,
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}:
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stdenv.mkDerivation {
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name = "add_file.patch";
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dontUnpack = true;
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buildPhase = ''
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mkdir -p $(dirname "${path}")
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cp ${file} "${path}"
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diff -u /dev/null "${path}" >result.patch || true # diff exit code is non-zero if there's a diff
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'';
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installPhase = ''cp result.patch $out'';
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};
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}
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