Pierre Langlois <pierre.langlois@gmx.com> writes:

> * gnu/packages/tree-sitter.scm (tree-sitter-emacs-module): New local variable.
> (emacs-tree-sitter-core): New variable.
> ---
>  gnu/packages/tree-sitter.scm | 85 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 85 insertions(+)
>
> diff --git a/gnu/packages/tree-sitter.scm b/gnu/packages/tree-sitter.scm
> index bb9972cb00..12f2d108d9 100644
> --- a/gnu/packages/tree-sitter.scm
> +++ b/gnu/packages/tree-sitter.scm
> @@ -29,6 +29,7 @@ (define-module (gnu packages tree-sitter)
>    #:use-module (gnu packages icu4c)
>    #:use-module (gnu packages node)
>    #:use-module (guix build-system cargo)
> +  #:use-module (guix build-system emacs)
>    #:use-module (guix build-system gnu)
>    #:use-module (guix build-system tree-sitter)
>    #:use-module (guix download)
> @@ -538,3 +539,87 @@ (define-public tree-sitter-racket
>       (git-version "0.1.0" revision commit)
>       #:repository-url "https://github.com/6cdh/tree-sitter-racket"
>       #:commit commit)))
> +
> +;; Local package definition solely for building the native emacs module
> +;; written in Rust.
> +(define tree-sitter-emacs-module
> +  (package
> +    (name "tree-sitter-emacs-module")
> +    (version "0.18.0")
> +    (source (origin
> +              (method git-fetch)
> +              (uri (git-reference
> +                    (url "https://github.com/emacs-tree-sitter/elisp-tree-sitter")
> +                    (commit version)))
> +              (file-name (git-file-name name version))
> +              (sha256
> +               (base32
> +                "1sdvz827v436qijs6xafakkfw2d16bvp8frymd818rppjc7a9dif"))))
> +    (build-system cargo-build-system)
> +    (inputs
> +     (list tree-sitter))
> +    (arguments
> +     (list
> +      #:cargo-inputs
> +      `(("rust-anyhow" ,rust-anyhow-1)
> +        ("rust-emacs" ,rust-emacs-0.18)
> +        ("rust-libloading" ,rust-libloading-0.7)
> +        ("rust-once-cell" ,rust-once-cell-1)
> +        ("rust-tree-sitter" ,rust-tree-sitter-for-emacs))
> +      #:phases
> +      #~(modify-phases %standard-phases
> +          (add-after 'unpack 'chdir
> +            (lambda _ (chdir "core")))
> +          (add-after 'chdir 'delete-cargo.lock
> +            (lambda _ (delete-file "Cargo.lock")))
> +          (add-after 'delete-cargo.lock 'do-not-fetch-from-github
> +            (lambda _
> +              (substitute* "Cargo.toml"
> +                (("\\[patch.*") "")
> +                (("git = .*") ""))))
> +          (replace 'install
> +            (lambda _
> +              (let ((lib (string-append #$output "/lib")))
> +                (mkdir-p lib)
> +                (copy-file "target/release/libtsc_dyn.so"
> +                           (string-append lib "/tsc-dyn.so"))))))))
> +    (home-page #f)
> +    (synopsis #f)
> +    (description #f)
> +    (license license:expat)))
> +
> +(define-public emacs-tree-sitter-core
> +  (package
> +    (name "emacs-tree-sitter-core")
> +    (version (package-version tree-sitter-emacs-module))
> +    (source (package-source tree-sitter-emacs-module))
> +    (build-system emacs-build-system)
> +    (native-inputs
> +     (list tree-sitter-emacs-module))

Wait, I think this should have been a regular input, not a native-input,
otherwise it'll break if we ever add cross-compilation support.

> +    (arguments
> +     (list
> +      #:phases
> +      #~(modify-phases %standard-phases
> +          (add-after 'unpack 'chdir
> +            (lambda _ (chdir "core")))
> +          (add-before 'install 'find-tsc-dyn
> +            (lambda* (#:key inputs #:allow-other-keys)
> +              (let ((module (search-input-file inputs "/lib/tsc-dyn.so")))
> +                ;; Install the tsc-dyn module in site-lisp and the current
> +                ;; directory for test to pass.
> +                (install-file module (elpa-directory #$output))
> +                (copy-file module "tsc-dyn.so")
> +                ;; We replace the tsc-dyn-get.el file with an empty stub to
> +                ;; prevent the code from downloading the module.
> +                (call-with-output-file "tsc-dyn-get.el"
> +                  (lambda (port)
> +                    (for-each
> +                     (lambda (sexp) (write sexp port))
> +                     '((defun tsc-dyn-get-ensure (requested)
> +                         nil)
> +                       (provide 'tsc-dyn-get)))))))))))
> +    (home-page "https://emacs-tree-sitter.github.io")
> +    (synopsis "Tree-sitter bindings for Emacs Lisp, core library")
> +    (description "This package provides core APIs of the Emacs binding for
> +Tree-sitter, an incremental parsing system.")
> +    (license license:expat)))