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clj-decompiler.el
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clj-decompiler.el
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;;; clj-decompiler.el --- Clojure Java decompiler expansion -*- lexical-binding: t -*-
;; Copyright © 2020-2020 Ben Sless
;;
;; Author: Ben Sless <[email protected]>
;; Maintainer: Ben Sless <[email protected]>
;; URL: https://github.com/bsless/clj-decompiler.el
;; Keywords: languages, clojure, cider, java, decompiler
;; Package-Requires: ((emacs "26.1") (clojure-mode "5.12") (cider "1.2.0"))
;; Version: 0.0.1
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;; This file is not part of GNU Emacs.
;;; Commentary:
;; Provides interactive functions for decompiling Clojure on the JVM by
;; loading them in the REPL and decompiling them with
;; https:/clojure-goes-fast/clj-java-decompiler
;;; Usage:
;; M-x clj-decompiler-decompile
;; M-x clj-decompiler-disassemble
;;; Code:
(defgroup clj-decompiler nil
"Clojure Java decompiler dependency that rides on top of CIDER."
:prefix "clj-decompiler-"
:group 'applications
:link '(url-link :tag "GitHub" "https:/bsless/clj-decompiler.el"))
(require 'cider-mode)
(require 'subr-x)
(defconst clj-decompiler-decompile-buffer "*clj-decompile*")
(defconst clj-decompiler-disassemble-buffer "*clj-disassemble*")
(defcustom clj-decompiler-decompiler-artifact "com.clojure-goes-fast/clj-java-decompiler"
"Coordinates for clj-java-decompiler."
:type 'string
:group 'clj-decompiler)
(defcustom clj-decompiler-decompiler-version "0.3.0"
"Decompiler artifact version."
:type 'string
:group 'clj-decompiler)
(defcustom clj-decompiler-namespace "clj-java-decompiler.core"
"Decompiler namespace containing decompile and disassemble macros."
:type 'string
:group 'clj-decompiler)
(defcustom clj-decompiler-disassemble-macro "disassemble"
"Macro which runs disassemble."
:type 'string
:group 'clj-decompiler)
(defcustom clj-decompiler-decompile-macro "decompile"
"Macro which runs decompile."
:type 'string
:group 'clj-decompiler)
(defcustom clj-decompiler-inject-dependencies-at-jack-in t
"Flag controlling whether disassembler should be injected as a dependency on `cider-jack-in'."
:type 'boolean
:group 'clj-decompiler)
(defun clj-decompiler-ensure-decompiler-dependency ()
"Ensure decompiler dependency will be jacked in."
(when (and clj-decompiler-inject-dependencies-at-jack-in
(boundp 'cider-jack-in-dependencies))
(cider-add-to-alist
'cider-jack-in-dependencies
clj-decompiler-decompiler-artifact
clj-decompiler-decompiler-version)))
(defun clj-decompiler-sync-request-eval-out (expr)
"Eval the given EXPR and return the result from STDOUT."
(cider-ensure-op-supported "eval")
(let* ((resp (cider-nrepl-send-sync-request `("op" "eval" "code" ,expr))))
(or
(nrepl-dict-get resp "out")
(nrepl-dict-get resp "err"))))
(defvar clj-decompiler-last-disassemble-expression nil
"Specify the last disassembly preformed.
This variable specifies both what was disassembled and the disassembler.")
(defun clj-decompiler-disassemble-expr (expr)
"Macroexpand, use EXPANDER, the given EXPR."
(let* ((ns (cider-current-ns))
(expr (format "(in-ns \'%s) (require '%s) (%s/%s %s)"
ns
clj-decompiler-namespace
clj-decompiler-namespace
clj-decompiler-disassemble-macro
expr)))
(when-let* ((expansion (clj-decompiler-sync-request-eval-out expr)))
(setq clj-decompiler-last-disassemble-expression expr)
(clj-decompiler-initialize-disassemble-buffer expansion))))
(defvar clj-decompiler-last-decompile-expression nil
"Specify the last decompilation preformed.
This variable specifies both what was decompiled and the decompiler.")
(defun clj-decompiler-decompile-expr (expr)
"Macroexpand, use EXPANDER, the given EXPR."
(let* ((ns (cider-current-ns))
(expr (format "(in-ns \'%s) (require '%s) (%s/%s %s)"
ns
clj-decompiler-namespace
clj-decompiler-namespace
clj-decompiler-decompile-macro
expr)))
(when-let* ((expansion (clj-decompiler-sync-request-eval-out expr)))
(setq clj-decompiler-last-decompile-expression expr)
(clj-decompiler-initialize-decompile-buffer expansion))))
;;;###autoload
(defun clj-decompiler-setup ()
"Ensure decompiler dependencies are injected to cider."
(interactive)
(clj-decompiler-ensure-decompiler-dependency))
;;;###autoload
(defun clj-decompiler-disassemble ()
"Invoke \\=`disassemble\\=` on the expression preceding point."
(interactive)
(clj-decompiler-disassemble-expr (cider-last-sexp)))
(defun clj-decompiler-initialize-disassemble-buffer (expansion)
"Create a new Macroexpansion buffer with EXPANSION and namespace NS."
(pop-to-buffer (clj-decompiler-create-disassemble-buffer))
(setq buffer-undo-list nil)
(let ((inhibit-read-only t)
(buffer-undo-list t))
(erase-buffer)
(insert (format "%s" expansion))
(goto-char (point-max))
(delete-trailing-whitespace)))
;;;###autoload
(defun clj-decompiler-decompile ()
"Invoke \\=`decompile\\=` on the expression preceding point."
(interactive)
(clj-decompiler-decompile-expr (cider-last-sexp)))
(defun clj-decompiler-initialize-decompile-buffer (expansion)
"Create a new Macroexpansion buffer with EXPANSION and namespace NS."
(pop-to-buffer (clj-decompiler-create-decompile-buffer))
(setq buffer-undo-list nil)
(let ((inhibit-read-only t)
(buffer-undo-list t))
(erase-buffer)
(insert (format "%s" expansion))
(goto-char (point-max))
(delete-trailing-whitespace)))
(declare-function cider-mode "cider-mode")
(defun clj-decompiler-create-disassemble-buffer ()
"Create a new macroexpansion buffer."
(with-current-buffer (cider-popup-buffer clj-decompiler-disassemble-buffer 'select 'java-mode 'ancillary)
(cider-mode -1)
(current-buffer)))
(defun clj-decompiler-create-decompile-buffer ()
"Create a new macroexpansion buffer."
(with-current-buffer (cider-popup-buffer clj-decompiler-decompile-buffer 'select 'java-mode 'ancillary)
(cider-mode -1)
(current-buffer)))
(provide 'clj-decompiler)
;;; clj-decompiler.el ends here