diff options
Diffstat (limited to 'nixpkgs/pkgs/applications/editors/emacs/elisp-packages/fetchelpa.nix')
| -rw-r--r-- | nixpkgs/pkgs/applications/editors/emacs/elisp-packages/fetchelpa.nix | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/applications/editors/emacs/elisp-packages/fetchelpa.nix b/nixpkgs/pkgs/applications/editors/emacs/elisp-packages/fetchelpa.nix new file mode 100644 index 000000000000..f4524f3b7a95 --- /dev/null +++ b/nixpkgs/pkgs/applications/editors/emacs/elisp-packages/fetchelpa.nix @@ -0,0 +1,21 @@ +# Elpa only serves the latest version of a given package uncompressed. +# Once that release is no longer the latest & greatest it gets archived and compressed +# meaning that both the URL and the hash changes. +# +# To work around this issue we fall back to the URL with the .lz suffix and if that's the +# one we downloaded we uncompress the file to ensure the hash matches regardless of compression. + +{ fetchurl, lzip }: + +{ url, ... }@args: fetchurl ((removeAttrs args [ "url" ]) // { + urls = [ + url + (url + ".lz") + ]; + postFetch = '' + if [[ $url == *.lz ]]; then + ${lzip}/bin/lzip -c -d $out > uncompressed + mv uncompressed $out + fi + ''; +}) |