;;; epl.el --- Emacs Package Library -*- lexical-binding: t; -*-
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;; Copyright (C) 2013-2015 Sebastian Wiesner
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;; Copyright (C) 1985-1986, 1992, 1994-1995, 1999-2015 Free Software
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;; Author: Sebastian Wiesner <swiesner@lunaryorn.com>
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;; Maintainer: Johan Andersson <johan.rejeep@gmail.com>
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;; Sebastian Wiesner <swiesner@lunaryorn.com>
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;; Version: 0.10-cvs
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;; Package-Version: 20180205.2049
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;; Package-Requires: ((cl-lib "0.3"))
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;; Keywords: convenience
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;; URL: http://github.com/cask/epl
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;; This file is NOT part of GNU Emacs.
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; A package management library for Emacs, based on package.el.
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;; The purpose of this library is to wrap all the quirks and hassle of
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;; package.el into a sane API.
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;; The following functions comprise the public interface of this library:
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;;; Package directory selection
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;; `epl-package-dir' gets the directory of packages.
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;; `epl-default-package-dir' gets the default package directory.
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;; `epl-change-package-dir' changes the directory of packages.
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;;; Package system management
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;; `epl-initialize' initializes the package system and activates all
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;; packages.
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;; `epl-reset' resets the package system.
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;; `epl-refresh' refreshes all package archives.
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;; `epl-add-archive' adds a new package archive.
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;;; Package objects
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;; Struct `epl-requirement' describes a requirement of a package with `name' and
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;; `version' slots.
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;; `epl-requirement-version-string' gets a requirement version as string.
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;; Struct `epl-package' describes an installed or installable package with a
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;; `name' and some internal `description'.
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;; `epl-package-version' gets the version of a package.
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;; `epl-package-version-string' gets the version of a package as string.
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;; `epl-package-summary' gets the summary of a package.
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;; `epl-package-requirements' gets the requirements of a package.
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;; `epl-package-directory' gets the installation directory of a package.
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;; `epl-package-from-buffer' creates a package object for the package contained
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;; in the current buffer.
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;; `epl-package-from-file' creates a package object for a package file, either
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;; plain lisp or tarball.
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;; `epl-package-from-descriptor-file' creates a package object for a package
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;; description (i.e. *-pkg.el) file.
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;;; Package database access
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;; `epl-package-installed-p' determines whether a package is installed, either
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;; built-in or explicitly installed.
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;; `epl-package-outdated-p' determines whether a package is outdated, that is,
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;; whether a package with a higher version number is available.
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;; `epl-built-in-packages', `epl-installed-packages', `epl-outdated-packages'
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;; and `epl-available-packages' get all packages built-in, installed, outdated,
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;; or available for installation respectively.
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;; `epl-find-built-in-package', `epl-find-installed-packages' and
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;; `epl-find-available-packages' find built-in, installed and available packages
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;; by name.
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;; `epl-find-upgrades' finds all upgradable packages.
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;; `epl-built-in-p' return true if package is built-in to Emacs.
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;;; Package operations
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;; `epl-install-file' installs a package file.
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;; `epl-package-install' installs a package.
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;; `epl-package-delete' deletes a package.
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;; `epl-upgrade' upgrades packages.
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;;; Code:
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(require 'cl-lib)
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(require 'package)
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(unless (fboundp #'define-error)
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;; `define-error' for 24.3 and earlier, copied from subr.el
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(defun define-error (name message &optional parent)
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"Define NAME as a new error signal.
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MESSAGE is a string that will be output to the echo area if such an error
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is signaled without being caught by a `condition-case'.
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PARENT is either a signal or a list of signals from which it inherits.
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Defaults to `error'."
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(unless parent (setq parent 'error))
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(let ((conditions
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(if (consp parent)
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(apply #'append
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(mapcar (lambda (parent)
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(cons parent
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(or (get parent 'error-conditions)
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(error "Unknown signal `%s'" parent))))
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parent))
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(cons parent (get parent 'error-conditions)))))
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(put name 'error-conditions
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(delete-dups (copy-sequence (cons name conditions))))
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(when message (put name 'error-message message)))))
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(defsubst epl--package-desc-p (package)
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"Whether PACKAGE is a `package-desc' object.
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Like `package-desc-p', but return nil, if `package-desc-p' is not
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defined as function."
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(and (fboundp 'package-desc-p) (package-desc-p package)))
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;;; EPL errors
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(define-error 'epl-error "EPL error")
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(define-error 'epl-invalid-package "Invalid EPL package" 'epl-error)
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(define-error 'epl-invalid-package-file "Invalid EPL package file"
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'epl-invalid-package)
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;;; Package directory
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(defun epl-package-dir ()
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"Get the directory of packages."
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package-user-dir)
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(defun epl-default-package-dir ()
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"Get the default directory of packages."
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(eval (car (get 'package-user-dir 'standard-value))))
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(defun epl-change-package-dir (directory)
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"Change the directory of packages to DIRECTORY."
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(setq package-user-dir directory)
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(epl-initialize))
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;;; Package system management
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(defvar epl--load-path-before-initialize nil
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"Remember the load path for `epl-reset'.")
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(defun epl-initialize (&optional no-activate)
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"Load Emacs Lisp packages and activate them.
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With NO-ACTIVATE non-nil, do not activate packages."
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(setq epl--load-path-before-initialize load-path)
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(package-initialize no-activate))
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(defalias 'epl-refresh 'package-refresh-contents)
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(defun epl-add-archive (name url)
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"Add a package archive with NAME and URL."
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(add-to-list 'package-archives (cons name url)))
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(defun epl-reset ()
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"Reset the package system.
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Clear the list of installed and available packages, the list of
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package archives and reset the package directory."
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(setq package-alist nil
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package-archives nil
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package-archive-contents nil
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load-path epl--load-path-before-initialize)
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(when (boundp 'package-obsolete-alist) ; Legacy package.el
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(setq package-obsolete-alist nil))
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(epl-change-package-dir (epl-default-package-dir)))
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;;; Package structures
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(cl-defstruct (epl-requirement
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(:constructor epl-requirement-create))
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"Structure describing a requirement.
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Slots:
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`name' The name of the required package, as symbol.
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`version' The version of the required package, as version list."
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name
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version)
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(defun epl-requirement-version-string (requirement)
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"The version of a REQUIREMENT, as string."
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(package-version-join (epl-requirement-version requirement)))
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(cl-defstruct (epl-package (:constructor epl-package-create))
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"Structure representing a package.
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Slots:
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`name' The package name, as symbol.
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`description' The package description.
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The format package description varies between package.el
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variants. For `package-desc' variants, it is simply the
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corresponding `package-desc' object. For legacy variants, it is
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a vector `[VERSION REQS DOCSTRING]'.
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Do not access `description' directly, but instead use the
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`epl-package' accessors."
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name
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description)
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(defmacro epl-package-as-description (var &rest body)
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"Cast VAR to a package description in BODY.
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VAR is a symbol, bound to an `epl-package' object. This macro
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casts this object to the `description' object, and binds the
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description to VAR in BODY."
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(declare (indent 1))
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(unless (symbolp var)
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(signal 'wrong-type-argument (list #'symbolp var)))
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`(if (epl-package-p ,var)
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(let ((,var (epl-package-description ,var)))
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,@body)
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(signal 'wrong-type-argument (list #'epl-package-p ,var))))
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(defsubst epl-package--package-desc-p (package)
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"Whether the description of PACKAGE is a `package-desc'."
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(epl--package-desc-p (epl-package-description package)))
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(defun epl-package-version (package)
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"Get the version of PACKAGE, as version list."
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(epl-package-as-description package
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(cond
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((fboundp 'package-desc-version) (package-desc-version package))
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;; Legacy
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((fboundp 'package-desc-vers)
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(let ((version (package-desc-vers package)))
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(if (listp version) version (version-to-list version))))
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(:else (error "Cannot get version from %S" package)))))
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(defun epl-package-version-string (package)
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"Get the version from a PACKAGE, as string."
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(package-version-join (epl-package-version package)))
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(defun epl-package-summary (package)
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"Get the summary of PACKAGE, as string."
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(epl-package-as-description package
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(cond
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((fboundp 'package-desc-summary) (package-desc-summary package))
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((fboundp 'package-desc-doc) (package-desc-doc package)) ; Legacy
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(:else (error "Cannot get summary from %S" package)))))
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(defsubst epl-requirement--from-req (req)
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"Create a `epl-requirement' from a `package-desc' REQ."
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(let ((version (cadr req)))
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(epl-requirement-create :name (car req)
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:version (if (listp version) version
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(version-to-list version)))))
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(defun epl-package-requirements (package)
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"Get the requirements of PACKAGE.
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The requirements are a list of `epl-requirement' objects."
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(epl-package-as-description package
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(mapcar #'epl-requirement--from-req (package-desc-reqs package))))
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(defun epl-package-directory (package)
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"Get the directory PACKAGE is installed to.
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Return the absolute path of the installation directory of
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PACKAGE, or nil, if PACKAGE is not installed."
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(cond
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((fboundp 'package-desc-dir)
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(package-desc-dir (epl-package-description package)))
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((fboundp 'package--dir)
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(package--dir (symbol-name (epl-package-name package))
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(epl-package-version-string package)))
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(:else (error "Cannot get package directory from %S" package))))
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(defun epl-package-->= (pkg1 pkg2)
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"Determine whether PKG1 is before PKG2 by version."
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(not (version-list-< (epl-package-version pkg1)
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(epl-package-version pkg2))))
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(defun epl-package--from-package-desc (package-desc)
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"Create an `epl-package' from a PACKAGE-DESC.
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PACKAGE-DESC is a `package-desc' object, from recent package.el
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variants."
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(if (and (fboundp 'package-desc-name)
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(epl--package-desc-p package-desc))
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(epl-package-create :name (package-desc-name package-desc)
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:description package-desc)
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(signal 'wrong-type-argument (list 'epl--package-desc-p package-desc))))
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(defun epl-package--parse-info (info)
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"Parse a package.el INFO."
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(if (epl--package-desc-p info)
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(epl-package--from-package-desc info)
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;; For legacy package.el, info is a vector [NAME REQUIRES DESCRIPTION
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;; VERSION COMMENTARY]. We need to re-shape this vector into the
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;; `package-alist' format [VERSION REQUIRES DESCRIPTION] to attach it to the
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;; new `epl-package'.
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(let ((name (intern (aref info 0)))
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(info (vector (aref info 3) (aref info 1) (aref info 2))))
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(epl-package-create :name name :description info))))
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(defun epl-package-from-buffer (&optional buffer)
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"Create an `epl-package' object from BUFFER.
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BUFFER defaults to the current buffer.
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Signal `epl-invalid-package' if the buffer does not contain a
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valid package file."
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(let ((info (with-current-buffer (or buffer (current-buffer))
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(condition-case err
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(package-buffer-info)
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(error (signal 'epl-invalid-package (cdr err)))))))
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(epl-package--parse-info info)))
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(defun epl-package-from-lisp-file (file-name)
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"Parse the package headers the file at FILE-NAME.
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Return an `epl-package' object with the header metadata."
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(with-temp-buffer
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(insert-file-contents file-name)
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(condition-case err
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(epl-package-from-buffer (current-buffer))
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;; Attach file names to invalid package errors
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(epl-invalid-package
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(signal 'epl-invalid-package-file (cons file-name (cdr err))))
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;; Forward other errors
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(error (signal (car err) (cdr err))))))
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(defun epl-package-from-tar-file (file-name)
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"Parse the package tarball at FILE-NAME.
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Return a `epl-package' object with the meta data of the tarball
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package in FILE-NAME."
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(condition-case nil
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;; In legacy package.el, `package-tar-file-info' takes the name of the tar
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;; file to parse as argument. In modern package.el, it has no arguments
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;; and works on the current buffer. Hence, we just try to call the legacy
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;; version, and if that fails because of a mismatch between formal and
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;; actual arguments, we use the modern approach. To avoid spurious
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;; signature warnings by the byte compiler, we suppress warnings when
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;; calling the function.
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(epl-package--parse-info (with-no-warnings
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(package-tar-file-info file-name)))
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(wrong-number-of-arguments
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(with-temp-buffer
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(insert-file-contents-literally file-name)
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;; Switch to `tar-mode' to enable extraction of the file. Modern
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;; `package-tar-file-info' relies on `tar-mode', and signals an error if
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;; called in a buffer with a different mode.
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(tar-mode)
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(epl-package--parse-info (with-no-warnings
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(package-tar-file-info)))))))
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(defun epl-package-from-file (file-name)
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"Parse the package at FILE-NAME.
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Return an `epl-package' object with the meta data of the package
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at FILE-NAME."
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(if (string-match-p (rx ".tar" string-end) file-name)
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(epl-package-from-tar-file file-name)
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(epl-package-from-lisp-file file-name)))
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(defun epl-package--parse-descriptor-requirement (requirement)
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"Parse a REQUIREMENT in a package descriptor."
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;; This function is only called on legacy package.el. On package-desc
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;; package.el, we just let package.el do the work.
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(cl-destructuring-bind (name version-string) requirement
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(list name (version-to-list version-string))))
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(defun epl-package-from-descriptor-file (descriptor-file)
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"Load a `epl-package' from a package DESCRIPTOR-FILE.
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A package descriptor is a file defining a new package. Its name
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typically ends with -pkg.el."
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(with-temp-buffer
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(insert-file-contents descriptor-file)
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(goto-char (point-min))
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(let ((sexp (read (current-buffer))))
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(unless (eq (car sexp) 'define-package)
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(error "%S is no valid package descriptor" descriptor-file))
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(if (and (fboundp 'package-desc-from-define)
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(fboundp 'package-desc-name))
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;; In Emacs snapshot, we can conveniently call a function to parse the
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;; descriptor
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(let ((desc (apply #'package-desc-from-define (cdr sexp))))
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(epl-package-create :name (package-desc-name desc)
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:description desc))
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;; In legacy package.el, we must manually deconstruct the descriptor,
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;; because the load function has eval's the descriptor and has a lot of
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;; global side-effects.
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(cl-destructuring-bind
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(name version-string summary requirements) (cdr sexp)
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(epl-package-create
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:name (intern name)
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:description
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(vector (version-to-list version-string)
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(mapcar #'epl-package--parse-descriptor-requirement
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;; Strip the leading `quote' from the package list
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(cadr requirements))
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summary)))))))
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;;; Package database access
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(defun epl-package-installed-p (package &optional min-version)
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"Determine whether a PACKAGE, of MIN-VERSION or newer, is installed.
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PACKAGE is either a package name as symbol, or a package object.
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When a explicit MIN-VERSION is provided it overwrites the version of the PACKAGE object."
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(let ((name (if (epl-package-p package)
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(epl-package-name package)
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package))
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(min-version (or min-version (and (epl-package-p package)
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(epl-package-version package)))))
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(package-installed-p name min-version)))
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(defun epl--parse-built-in-entry (entry)
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"Parse an ENTRY from the list of built-in packages.
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Return the corresponding `epl-package' object."
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(if (fboundp 'package--from-builtin)
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;; In package-desc package.el, convert the built-in package to a
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;; `package-desc' and convert that to an `epl-package'
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(epl-package--from-package-desc (package--from-builtin entry))
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(epl-package-create :name (car entry) :description (cdr entry))))
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(defun epl-built-in-packages ()
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"Get all built-in packages.
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Return a list of `epl-package' objects."
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;; This looks mighty strange, but it's the only way to force package.el to
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;; build the list of built-in packages. Without this, `package--builtins'
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;; might be empty.
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(package-built-in-p 'foo)
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(mapcar #'epl--parse-built-in-entry package--builtins))
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(defun epl-find-built-in-package (name)
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"Find a built-in package with NAME.
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NAME is a package name, as symbol.
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Return the built-in package as `epl-package' object, or nil if
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there is no built-in package with NAME."
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(when (package-built-in-p name)
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;; We must call `package-built-in-p' *before* inspecting
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;; `package--builtins', because otherwise `package--builtins' might be
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;; empty.
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(epl--parse-built-in-entry (assq name package--builtins))))
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(defun epl-package-outdated-p (package)
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"Determine whether a PACKAGE is outdated.
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A package is outdated, if there is an available package with a
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higher version.
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PACKAGE is either a package name as symbol, or a package object.
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In the former case, test the installed or built-in package with
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the highest version number, in the later case, test the package
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object itself.
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Return t, if the package is outdated, or nil otherwise."
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(let* ((package (if (epl-package-p package)
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package
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(or (car (epl-find-installed-packages package))
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(epl-find-built-in-package package))))
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(available (car (epl-find-available-packages
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(epl-package-name package)))))
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(and package available (version-list-< (epl-package-version package)
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(epl-package-version available)))))
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(defun epl--parse-package-list-entry (entry)
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"Parse a list of packages from ENTRY.
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ENTRY is a single entry in a package list, e.g. `package-alist',
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`package-archive-contents', etc. Typically it is a cons cell,
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but the exact format varies between package.el versions. This
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function tries to parse all known variants.
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Return a list of `epl-package' objects parsed from ENTRY."
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(let ((descriptions (cdr entry)))
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(cond
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((listp descriptions)
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(sort (mapcar #'epl-package--from-package-desc descriptions)
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#'epl-package-->=))
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;; Legacy package.el has just a single package in an entry, which is a
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;; standard description vector
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((vectorp descriptions)
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(list (epl-package-create :name (car entry)
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:description descriptions)))
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(:else (error "Cannot parse entry %S" entry)))))
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(defun epl-installed-packages ()
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"Get all installed packages.
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Return a list of package objects."
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(apply #'append (mapcar #'epl--parse-package-list-entry package-alist)))
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(defsubst epl--filter-outdated-packages (packages)
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"Filter outdated packages from PACKAGES."
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(let (res)
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(dolist (package packages)
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(when (epl-package-outdated-p package)
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(push package res)))
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(nreverse res)))
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(defun epl-outdated-packages ()
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"Get all outdated packages, as in `epl-package-outdated-p'.
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Return a list of package objects."
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(epl--filter-outdated-packages (epl-installed-packages)))
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(defsubst epl--find-package-in-list (name list)
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"Find a package by NAME in a package LIST.
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Return a list of corresponding `epl-package' objects."
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(let ((entry (assq name list)))
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(when entry
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(epl--parse-package-list-entry entry))))
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(defun epl-find-installed-package (name)
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"Find the latest installed package by NAME.
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NAME is a package name, as symbol.
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Return the installed package with the highest version number as
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`epl-package' object, or nil, if no package with NAME is
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installed."
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(car (epl-find-installed-packages name)))
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(make-obsolete 'epl-find-installed-package 'epl-find-installed-packages "0.7")
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(defun epl-find-installed-packages (name)
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"Find all installed packages by NAME.
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NAME is a package name, as symbol.
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Return a list of all installed packages with NAME, sorted by
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version number in descending order. Return nil, if there are no
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packages with NAME."
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(epl--find-package-in-list name package-alist))
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(defun epl-available-packages ()
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"Get all packages available for installation.
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Return a list of package objects."
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(apply #'append (mapcar #'epl--parse-package-list-entry
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package-archive-contents)))
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(defun epl-find-available-packages (name)
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"Find available packages for NAME.
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NAME is a package name, as symbol.
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Return a list of available packages for NAME, sorted by version
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number in descending order. Return nil, if there are no packages
|
for NAME."
|
(epl--find-package-in-list name package-archive-contents))
|
|
(cl-defstruct (epl-upgrade
|
(:constructor epl-upgrade-create))
|
"Structure describing an upgradable package.
|
Slots:
|
|
`installed' The installed package
|
|
`available' The package available for installation."
|
installed
|
available)
|
|
(defun epl-find-upgrades (&optional packages)
|
"Find all upgradable PACKAGES.
|
|
PACKAGES is a list of package objects to upgrade, defaulting to
|
all installed packages.
|
|
Return a list of `epl-upgrade' objects describing all upgradable
|
packages."
|
(let ((packages (or packages (epl-installed-packages)))
|
upgrades)
|
(dolist (pkg packages)
|
(let* ((version (epl-package-version pkg))
|
(name (epl-package-name pkg))
|
;; Find the latest available package for NAME
|
(available-pkg (car (epl-find-available-packages name)))
|
(available-version (when available-pkg
|
(epl-package-version available-pkg))))
|
(when (and available-version (version-list-< version available-version))
|
(push (epl-upgrade-create :installed pkg
|
:available available-pkg)
|
upgrades))))
|
(nreverse upgrades)))
|
|
(defalias 'epl-built-in-p 'package-built-in-p)
|
|
|
;;; Package operations
|
|
(defun epl-install-file (file)
|
"Install a package from FILE, like `package-install-file'."
|
(interactive (advice-eval-interactive-spec
|
(cadr (interactive-form #'package-install-file))))
|
(apply #'package-install-file (list file))
|
(let ((package (epl-package-from-file file)))
|
(unless (epl-package--package-desc-p package)
|
(epl--kill-autoload-buffer package))))
|
|
(defun epl--kill-autoload-buffer (package)
|
"Kill the buffer associated with autoloads for PACKAGE."
|
(let* ((auto-name (format "%s-autoloads.el" (epl-package-name package)))
|
(generated-autoload-file (expand-file-name auto-name (epl-package-directory package)))
|
(buf (find-buffer-visiting generated-autoload-file)))
|
(when buf (kill-buffer buf))))
|
|
(defun epl-package-install (package &optional force)
|
"Install a PACKAGE.
|
|
PACKAGE is a `epl-package' object. If FORCE is given and
|
non-nil, install PACKAGE, even if it is already installed."
|
(when (or force (not (epl-package-installed-p package)))
|
(if (epl-package--package-desc-p package)
|
(package-install (epl-package-description package))
|
;; The legacy API installs by name. We have no control over versioning,
|
;; etc.
|
(package-install (epl-package-name package))
|
(epl--kill-autoload-buffer package))))
|
|
(defun epl-package-delete (package)
|
"Delete a PACKAGE.
|
|
PACKAGE is a `epl-package' object to delete."
|
;; package-delete allows for packages being trashed instead of fully deleted.
|
;; Let's prevent his silly behavior
|
(let ((delete-by-moving-to-trash nil))
|
;; The byte compiler will warn us that we are calling `package-delete' with
|
;; the wrong number of arguments, since it can't infer that we guarantee to
|
;; always call the correct version. Thus we suppress all warnings when
|
;; calling `package-delete'. I wish there was a more granular way to
|
;; disable just that specific warning, but it is what it is.
|
(if (epl-package--package-desc-p package)
|
(with-no-warnings
|
(package-delete (epl-package-description package)))
|
;; The legacy API deletes by name (as string!) and version instead by
|
;; descriptor. Hence `package-delete' takes two arguments. For some
|
;; insane reason, the arguments are strings here!
|
(let ((name (symbol-name (epl-package-name package)))
|
(version (epl-package-version-string package)))
|
(with-no-warnings
|
(package-delete name version))
|
;; Legacy package.el does not remove the deleted package
|
;; from the `package-alist', so we do it manually here.
|
(let ((pkg (assq (epl-package-name package) package-alist)))
|
(when pkg
|
(setq package-alist (delq pkg package-alist))))))))
|
|
(defun epl-upgrade (&optional packages preserve-obsolete)
|
"Upgrade PACKAGES.
|
|
PACKAGES is a list of package objects to upgrade, defaulting to
|
all installed packages.
|
|
The old versions of the updated packages are deleted, unless
|
PRESERVE-OBSOLETE is non-nil.
|
|
Return a list of all performed upgrades, as a list of
|
`epl-upgrade' objects."
|
(let ((upgrades (epl-find-upgrades packages)))
|
(dolist (upgrade upgrades)
|
(epl-package-install (epl-upgrade-available upgrade) 'force)
|
(unless preserve-obsolete
|
(epl-package-delete (epl-upgrade-installed upgrade))))
|
upgrades))
|
|
(provide 'epl)
|
|
;;; epl.el ends here
|
