depot/third_party/tvl/tools/emacs-pkgs/buildEmacsPackage.nix

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# Builder for depot-internal Emacs packages. Packages built using this
# builder are added into the Emacs packages fixpoint under
# `emacsPackages.tvlPackages`, which in turn makes it possible to use
# them with special Emacs features like native compilation.
#
# Arguments passed to the builder are the same as
# emacsPackages.trivialBuild, except:
#
# * packageRequires is not used
#
# * externalRequires takes a selection function for packages from
# emacsPackages
#
# * internalRequires takes other depot packages
{ pkgs, ... }:
buildArgs:
pkgs.callPackage
({ emacsPackages }:
let
# Select external dependencies from the emacsPackages set
externalDeps = (buildArgs.externalRequires or (_: [ ])) emacsPackages;
# Override emacsPackages for depot-internal packages
internalDeps = map (p: p.override { inherit emacsPackages; })
(buildArgs.internalRequires or [ ]);
trivialBuildArgs = builtins.removeAttrs buildArgs [
"externalRequires"
"internalRequires"
] // {
packageRequires = externalDeps ++ internalDeps;
};
in
emacsPackages.trivialBuild trivialBuildArgs)
{ }