melpaBuild: add unpackCmd for single-file packages
Emacs packages are commonly distributed as single .el files. This unpackCmd handles them correctly and sets up sourceRoot. Other sources are treated in the default manner.
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@ -29,6 +29,19 @@ in
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stdenv.mkDerivation ({
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name = "emacs-${pname}${optionalString (version != null) "-${version}"}";
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unpackCmd = ''
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case "$curSrc" in
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*.el)
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cp $curSrc $pname.el
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chmod +w $pname.el
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sourceRoot="."
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;;
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*)
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_defaultUnpack "$curSrc"
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;;
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esac
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'';
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buildInputs = [emacs texinfo] ++ packageRequires ++ buildInputs;
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propagatedBuildInputs = packageRequires;
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propagatedUserEnvPkgs = packageRequires;
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