d65f1b20c3
This approach has several differences with emacs2nix: - the updater uses a downloaded recipes.json and archive.json for commit information, it uses a local checkout only for hashing the recipes - the generated file is JSON - the updater is written in emacs lisp - prefetch errors are put into an error key in the JSON, for review + meta.broken attributes are generated from it The updater re-uses the existing generated file to memoize prefetched content-sha256s for commits, thus prefetching should normally be quite fast.
90 lines
2.8 KiB
Nix
90 lines
2.8 KiB
Nix
lib: self:
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let
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fetcherGenerators = { repo ? null
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, url ? null
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, ... }:
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{ sha256
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, commit
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, ...}: {
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github = self.callPackage ({ fetchFromGitHub }:
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fetchFromGitHub {
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owner = lib.head (lib.splitString "/" repo);
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repo = lib.head (lib.tail (lib.splitString "/" repo));
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rev = commit;
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inherit sha256;
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}
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) {};
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gitlab = self.callPackage ({ fetchFromGitLab }:
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fetchFromGitLab {
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owner = lib.head (lib.splitString "/" repo);
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repo = lib.head (lib.tail (lib.splitString "/" repo));
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rev = commit;
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inherit sha256;
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}
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) {};
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git = self.callPackage ({ fetchgit }:
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fetchgit {
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rev = commit;
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inherit sha256 url;
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}
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) {};
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bitbucket = self.callPackage ({ fetchhg }:
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fetchhg {
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rev = commit;
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url = "https://bitbucket.com/${repo}";
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inherit sha256;
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}
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) {};
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hg = self.callPackage ({ fetchhg }:
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fetchhg {
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rev = commit;
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inherit sha256 url;
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}
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) {};
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};
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in {
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melpaDerivation = variant:
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{ ename, fetcher
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, commit ? null
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, sha256 ? null
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, ... }@args:
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let
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sourceArgs = args."${variant}";
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version = sourceArgs.version or null;
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deps = sourceArgs.deps or null;
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error = sourceArgs.error or args.error or null;
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hasSource = lib.hasAttr variant args;
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pname = builtins.replaceStrings [ "@" ] [ "at" ] ename;
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broken = ! isNull error;
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in
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lib.nameValuePair ename (if hasSource then (
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self.callPackage ({ melpaBuild, fetchurl, ... }@pkgargs:
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melpaBuild {
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inherit pname;
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ename = ename;
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version = if isNull version then "" else
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lib.concatStringsSep "." (map toString version);
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# TODO: Broken should not result in src being null (hack to avoid eval errors)
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src = if (isNull sha256 || broken) then null else
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lib.getAttr fetcher (fetcherGenerators args sourceArgs);
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recipe = if isNull commit then null else
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fetchurl {
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name = pname + "-recipe";
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url = "https://raw.githubusercontent.com/melpa/melpa/${commit}/recipes/${ename}";
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inherit sha256;
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};
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packageRequires = lib.optional (! isNull deps)
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(map (dep: pkgargs."${dep}" or self."${dep}" or null)
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deps);
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meta = (sourceArgs.meta or {}) // {
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inherit broken;
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};
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}
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) {}
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) else null);
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}
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