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565 lines
22 KiB
EmacsLisp
565 lines
22 KiB
EmacsLisp
;;; info-xref.el --- check external references in an Info document -*- lexical-binding: t -*-
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;; Copyright (C) 2003-2024 Free Software Foundation, Inc.
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;; Author: Kevin Ryde <user42@zip.com.au>
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;; Keywords: docs
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;; Version: 3
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;; This file is part of GNU Emacs.
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;; GNU Emacs 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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;; GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This is some simple checking of external cross references in info files,
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;; docstrings and custom-links by attempting to visit the nodes specified.
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;;
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;; `M-x info-xref-check' checks a single info file. See the docstring for
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;; details.
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;;
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;; `M-x info-xref-check-all' checks all info files in Info-directory-list.
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;; This is a good way to check the consistency of the whole system.
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;;
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;; `M-x info-xref-check-all-custom' loads up all defcustom variables and
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;; checks any info references in them.
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;;
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;; `M-x info-xref-docstrings' checks docstring "Info node ..." hyperlinks in
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;; source files (and other files).
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;;; History:
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;; Version 3 - new M-x info-xref-docstrings, use compilation-mode
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;;; Code:
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(require 'info)
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(eval-when-compile (require 'cl-lib)) ; for `cl-incf'
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(defgroup info-xref nil
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"Check external cross-references in Info documents."
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:group 'docs) ; FIXME right parent?
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;; Should this even be an option?
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(defcustom info-xref-case-fold nil
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"Non-nil means node checks should ignore case.
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When following cross-references, the Emacs Info reader first tries a
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case-sensitive match, then if that fails a case-insensitive one.
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The standalone Info reader does not do this, nor does this work
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for links in the html versions of Texinfo manuals. Therefore
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to ensure your cross-references work on the widest range of platforms,
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you should set this variable to nil."
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:group 'info-xref
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:type 'boolean
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:version "24.4")
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;;-----------------------------------------------------------------------------
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;; vaguely generic
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(defun info-xref-lock-file-p (filename)
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"Return non-nil if FILENAME is an Emacs lock file.
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A lock file is \".#foo.txt\" etc per `lock-buffer'."
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(string-match "\\(\\`\\|/\\)\\.#" filename))
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(defun info-xref-subfile-p (filename)
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"Return t if FILENAME is an info subfile.
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If removing the last \"-<NUM>\" from the filename gives a file
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which exists, then consider FILENAME a subfile. This is an
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imperfect test, probably ought to open up the purported top file
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and see what subfiles it says."
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(let ((nondir (file-name-nondirectory filename)))
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(and (string-match "\\`\\(\\([^-]*-\\)*[^-]*\\)-[0-9]+\\(.*\\)\\'" nondir)
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(file-exists-p (concat (file-name-directory filename)
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(match-string 1 nondir)
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(match-string 3 nondir))))))
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(defmacro info-xref-with-file (filename &rest body)
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;; checkdoc-params: (filename body)
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"Evaluate BODY in a buffer containing the contents of FILENAME.
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If FILENAME is already in a buffer then that's used, otherwise a
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temporary buffer.
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The current implementation uses `insert-file-contents' rather
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than `find-file-noselect' so as not to be held up by queries
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about local variables or possible weirdness in a major mode.
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`lm-with-file' does a similar thing, but it sets
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`emacs-lisp-mode' which is not wanted here."
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(declare (debug (form def-body)) (indent 1))
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`(let* ((info-xref-with-file--filename ,filename)
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(info-xref-with-file--body (lambda () ,@body))
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(info-xref-with-file--existing
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(find-buffer-visiting info-xref-with-file--filename)))
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(if info-xref-with-file--existing
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(with-current-buffer info-xref-with-file--existing
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(save-excursion
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(funcall info-xref-with-file--body)))
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(with-temp-buffer
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(insert-file-contents ,filename)
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(funcall info-xref-with-file--body)))))
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;;-----------------------------------------------------------------------------
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;; output buffer
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(defconst info-xref-output-buffer "*info-xref results*"
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"Name of the buffer for info-xref results.")
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(defvar info-xref-good 0
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"Count of good cross references, during info-xref processing.")
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(defvar info-xref-bad 0
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"Count of bad cross references, during info-xref processing.")
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(defvar info-xref-unavail 0
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"Count of unavailable cross references, during info-xref processing.")
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(defvar info-xref-output-heading ""
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"A heading string, during info-xref processing.
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This is shown if there's an error, but not if successful.")
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(defvar info-xref-filename nil
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"The current buffer's filename, during info-xref processing.
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When looking at file contents in a temp buffer there's no
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`buffer-file-name', hence this variable.")
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(defvar info-xref-xfile-alist nil
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"Info files found or not found, during info-xref processing.
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Key is \"(foo)\" etc and value nil or t according to whether info
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manual \"(foo)\" exists or not. This is used to suppress
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duplicate messages about foo not being available. (Duplicates
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within one top-level file that is.)")
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(defvar info-xref-in-progress nil)
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(defmacro info-xref-with-output (&rest body)
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"Run BODY with an info-xref output buffer.
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This is meant to nest, so you can wrap it around a set of
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different info-xref checks and have them write to the one output
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buffer created by the outermost `info-xref-with-output', with an
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overall good/bad count summary inserted at the very end."
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(declare (debug t))
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`(save-excursion
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(unless info-xref-in-progress
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(display-buffer (get-buffer-create info-xref-output-buffer))
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(set-buffer info-xref-output-buffer)
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(setq buffer-read-only nil)
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(fundamental-mode)
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(erase-buffer)
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(insert ";; info-xref output -*- mode: compilation -*-\n\n")
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(compilation-mode)
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(setq info-xref-good 0
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info-xref-bad 0
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info-xref-unavail 0
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info-xref-xfile-alist nil))
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(let ((info-xref-in-progress t)
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(info-xref-output-heading ""))
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,@body)
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(unless info-xref-in-progress
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(info-xref-output "done, %d good, %d bad, %d unavailable"
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info-xref-good info-xref-bad info-xref-unavail))))
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(defun info-xref-output (fmt &rest args)
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"Emit a `format-message'-ed message FMT+ARGS to the `info-xref-output-buffer'."
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(with-current-buffer info-xref-output-buffer
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(save-excursion
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(goto-char (point-max))
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(let ((inhibit-read-only t))
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(insert info-xref-output-heading
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(apply #'format-message fmt args)
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"\n")))
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(setq info-xref-output-heading "")
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;; all this info-xref can be pretty slow, display now so the user sees
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;; some progress
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(sit-for 0)))
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(put 'info-xref-output 'byte-compile-format-like t)
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(defun info-xref-output-error (fmt &rest args)
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"Emit a `format'-ed error FMT+ARGS to the `info-xref-output-buffer'.
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The error is attributed to `info-xref-filename' and the current
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buffer's line and column of point."
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(apply 'info-xref-output
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(concat "%s:%s:%s: " fmt)
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info-xref-filename
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(1+ (count-lines (point-min) (line-beginning-position)))
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(1+ (current-column))
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args))
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(put 'info-xref-output-error 'byte-compile-format-like t)
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;;-----------------------------------------------------------------------------
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;; node checking
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;; When asking Info-goto-node to fork, *info* needs to be the current
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;; buffer, otherwise it seems to clone the current buffer but then do the
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;; goto-node in plain *info*.
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;;
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;; We only fork if *info* already exists, if it doesn't then can create and
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;; destroy just that instead of a new name.
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;;
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;; If Info-goto-node can't find the file, then no new buffer is created. If
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;; it finds the file but not the node, then a buffer is created. Handle
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;; this difference by checking before killing.
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;;
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(defun info-xref-goto-node-p (node)
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"Return t if it's possible to go to the given NODE."
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(let ((oldbuf (current-buffer)))
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(save-excursion
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(save-window-excursion
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(prog1
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(condition-case nil
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(progn
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(Info-goto-node node
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(when (get-buffer "*info*")
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(set-buffer "*info*")
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"xref - temporary")
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(not info-xref-case-fold))
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t)
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(error nil))
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(unless (equal (current-buffer) oldbuf)
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(kill-buffer)))))))
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(defun info-xref-check-node (node)
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;; Collapse spaces as per info.el and `help-make-xrefs'.
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;; Note defcustom :info-link nodes don't get this whitespace collapsing,
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;; they should be the exact node name ready to visit.
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;; `info-xref-check-all-custom' uses `info-xref-goto-node-p' and so
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;; doesn't come through here.
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;;
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;; Could use "[\t\n ]+" but try to avoid uselessly replacing " " with " ".
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(setq node (replace-regexp-in-string "[\t\n][\t\n ]*\\| [\t\n ]+" " "
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node t t))
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(if (not (string-match "\\`([^)]*)" node))
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(info-xref-output-error "No `(file)' part at start of node: %s\n" node)
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(let ((file (match-string 0 node)))
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(if (string-equal "()" file)
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(info-xref-output-error "Empty filename part: %s" node)
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;; see if the file exists, if haven't looked before
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(unless (assoc file info-xref-xfile-alist)
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(let ((found (info-xref-goto-node-p file)))
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(push (cons file found) info-xref-xfile-alist)
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(unless found
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(info-xref-output-error "Not available to check: %s\n (this reported once per file)" file))))
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;; if the file exists, try the node
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(cond ((not (cdr (assoc file info-xref-xfile-alist)))
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(cl-incf info-xref-unavail))
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((info-xref-goto-node-p node)
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(cl-incf info-xref-good))
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(t
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(cl-incf info-xref-bad)
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(info-xref-output-error "No such node: %s" node)))))))
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;;-----------------------------------------------------------------------------
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;;;###autoload
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(defun info-xref-check (filename)
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"Check external references in FILENAME, an info document.
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Interactively from an `Info-mode' or `texinfo-mode' buffer the
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current info file is the default.
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Results are shown in a `compilation-mode' buffer. The format is
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a bit rough, but there shouldn't be many problems normally. The
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file:line:column: is the info document, but of course normally
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any correction should be made in the original .texi file.
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Finding the right place in the .texi is a manual process.
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When a target info file doesn't exist there's obviously no way to
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validate node references within it. A message is given for
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missing target files once per source document. It could be
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simply that you don't have the target installed, or it could be a
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mistake in the reference.
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Indirect info files are understood, just pass the top-level
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foo.info to `info-xref-check' and it traverses all sub-files.
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Compressed info files are accepted too as usual for `Info-mode'.
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\"makeinfo\" checks references internal to an info document, but
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not external references, which makes it rather easy for mistakes
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to creep in or node name changes to go unnoticed.
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`Info-validate' doesn't check external references either."
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(interactive
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(list
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(let* ((default-filename
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(cond ((eq major-mode 'Info-mode)
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Info-current-file)
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((eq major-mode 'texinfo-mode)
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;; look for @setfilename like makeinfo.el does
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(save-excursion
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(goto-char (point-min))
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(if (re-search-forward
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"^@setfilename[ \t]+\\([^ \t\n]+\\)[ \t]*"
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(line-beginning-position 100) t)
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(expand-file-name (match-string 1)))))))
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(prompt (if default-filename
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(format "Info file (%s): " default-filename)
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"Info file: ")))
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(read-file-name prompt nil default-filename t))))
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(info-xref-check-list (list filename)))
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;;;###autoload
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(defun info-xref-check-all ()
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"Check external references in all info documents in the info path.
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`Info-directory-list' and `Info-additional-directory-list' are
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the info paths. See `info-xref-check' for how each file is
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checked.
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The search for \"all\" info files is rather permissive, since
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info files don't necessarily have a \".info\" extension and in
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particular the Emacs manuals normally don't. If you have a
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source code directory in `Info-directory-list' then a lot of
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extraneous files might be read. This will be time consuming but
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should be harmless."
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(interactive)
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(info-xref-check-list (info-xref-all-info-files)))
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;; An alternative for getting only top-level files here would be to simply
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;; return all files and have info-xref-check-list not follow "Indirect:".
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;; The current way seems better because it (potentially) gets the proper
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;; top-level filename into the error messages, and suppresses duplicate "not
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;; available" messages for all subfiles of a single document.
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(defun info-xref-all-info-files ()
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"Return a list of all available info files.
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Only top level files are returned, subfiles are excluded.
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Since info files don't have to have a .info suffix, all files in
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the relevant directories are considered, which might mean a lot
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of extraneous things if for instance a source code directory is
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in the path."
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(info-initialize) ;; establish Info-directory-list
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(apply 'nconc
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(mapcar
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(lambda (dir)
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(let ((result nil))
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(dolist (name (directory-files
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dir
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t ;; absolute filenames
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"\\`[^.]")) ;; not dotfiles, nor .# lockfiles
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(when (and (file-exists-p name) ;; ignore broken symlinks
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(not (string-match "\\.te?xi\\'" name)) ;; not .texi
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(not (backup-file-name-p name))
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(not (file-directory-p name))
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(not (info-xref-subfile-p name)))
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(push name result)))
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(nreverse result)))
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(append Info-directory-list Info-additional-directory-list))))
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(defun info-xref-check-list (filename-list)
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"Check external references in info documents in FILENAME-LIST."
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(info-xref-with-output
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(dolist (info-xref-filename filename-list)
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(setq info-xref-xfile-alist nil)
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(let ((info-xref-output-heading
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(format "Info file %s\n" info-xref-filename)))
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(with-temp-message (format "Looking at %s" info-xref-filename)
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(with-temp-buffer
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(info-insert-file-contents info-xref-filename)
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(goto-char (point-min))
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(if (search-forward "\^_\nIndirect:\n" nil t)
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(let ((dir (file-name-directory info-xref-filename)))
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(while (looking-at "\\(.*\\): [0-9]+\n")
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(let ((info-xref-filename
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(expand-file-name (match-string 1) dir)))
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(with-temp-buffer
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(info-insert-file-contents info-xref-filename)
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(info-xref-check-buffer)))
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(forward-line)))
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(info-xref-check-buffer))))))))
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(defconst info-xref-node-re "\\(?1:\\(([^)]*)\\)[^.,]+\\)"
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"Regexp with subexp 1 matching (manual)node.")
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;; "@xref{node,crossref,manual}." produces:
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;; texinfo 4 or 5:
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;; *Note crossref: (manual)node.
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;; "@xref{node,,manual}." produces:
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;; texinfo 4:
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;; *Note node: (manual)node.
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;; texinfo 5:
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;; *Note (manual)node::.
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(defconst info-xref-note-re
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(concat "\\*[Nn]ote[ \n\t]+\\(?:"
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"[^:]*:[ \n\t]+" info-xref-node-re "\\|"
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info-xref-node-re "::\\)[.,]")
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"Regexp matching a \"*note...\" link.")
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(defun info-xref-check-buffer ()
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"Check external references in the info file in the current buffer.
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This should be the raw file contents, not `Info-mode'."
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(goto-char (point-min))
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(while (re-search-forward info-xref-note-re nil t)
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(save-excursion
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(goto-char (match-beginning 1)) ;; start of nodename as error position
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(info-xref-check-node (match-string 1)))))
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(defvar viper-mode) ;; quieten the byte compiler
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(defvar gnus-registry-install)
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;;;###autoload
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(defun info-xref-check-all-custom ()
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"Check info references in all customize groups and variables.
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Info references can be in `custom-manual' or `info-link' entries
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of the `custom-links' for a variable.
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Any `custom-load' autoloads in variables are loaded in order to
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get full link information. This will be a lot of Lisp packages
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and can take a long time."
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(interactive)
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(info-xref-with-output
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;; `custom-load-symbol' is not used, since it quietly ignores errors, but
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;; we want to show them since they mean incomplete checking.
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;;
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;; Just one pass through mapatoms is made. There shouldn't be any new
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;; custom-loads setup by packages loaded.
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;;
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(info-xref-output "Loading custom-load autoloads ...")
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(require 'cus-start)
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(require 'cus-load)
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;; These are `setq' rather than `let' since a let would unbind the
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;; variables after viper.el/gnus-registry.el have loaded, defeating the
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;; defvars in those files. Of course it'd be better if those files
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;; didn't make interactive queries on loading at all, to allow for
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;; programmatic loading like here.
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(unless (boundp 'viper-mode)
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(setq viper-mode nil)) ;; avoid viper.el ask about viperizing
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(unless (boundp 'gnus-registry-install)
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(setq gnus-registry-install nil)) ;; avoid gnus-registry.el querying
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(mapatoms
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(lambda (symbol)
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|
(dolist (load (get symbol 'custom-loads))
|
|
(cond ((symbolp load)
|
|
(condition-case cause (require load)
|
|
(error
|
|
(info-xref-output "Symbol `%s': cannot require `%s': %s"
|
|
symbol load cause))))
|
|
;; skip if previously loaded
|
|
((assoc load load-history))
|
|
((assoc (locate-library load) load-history))
|
|
(t
|
|
(condition-case err
|
|
(load load)
|
|
(error
|
|
(info-xref-output "Symbol `%s': cannot load \"%s\": %s"
|
|
symbol load
|
|
(error-message-string err)))))))))
|
|
|
|
;; Don't bother to check whether the info file exists as opposed to just
|
|
;; a missing node. If you have the code then you should have the
|
|
;; documentation, so a wrong node name will be the usual fault.
|
|
;;
|
|
(info-xref-output "\nChecking custom-links references ...")
|
|
(mapatoms
|
|
(lambda (symbol)
|
|
(dolist (link (get symbol 'custom-links))
|
|
(when (memq (car link) '(custom-manual info-link))
|
|
;; skip :tag part of (custom-manual :tag "Foo" "(foo)Node")
|
|
(if (eq :tag (cadr link))
|
|
(setq link (cddr link)))
|
|
(if (info-xref-goto-node-p (cadr link))
|
|
(cl-incf info-xref-good)
|
|
(cl-incf info-xref-bad)
|
|
;; symbol-file gives nil for preloaded variables, would need
|
|
;; to copy what describe-variable does to show the right place
|
|
(info-xref-output "Symbol `%s' (file %s): cannot goto node: %s"
|
|
symbol
|
|
(symbol-file symbol 'defvar)
|
|
(cadr link)))))))))
|
|
|
|
;;;###autoload
|
|
(defun info-xref-docstrings (filename-list)
|
|
;; checkdoc-params: (filename-list)
|
|
"Check docstring info node references in source files.
|
|
The given files are searched for docstring hyperlinks like
|
|
|
|
Info node `(elisp)Documentation Tips'
|
|
|
|
and those links checked by attempting to visit the target nodes
|
|
as per `info-xref-check' does.
|
|
|
|
Interactively filenames are read as a wildcard pattern like
|
|
\"foo*.el\", with the current file as a default. Usually this
|
|
will be lisp sources, but anything with such hyperlinks can be
|
|
checked, including the Emacs .c sources (or the etc/DOC file of
|
|
all builtins).
|
|
|
|
Because info node hyperlinks are found by a simple regexp search
|
|
in the files, the Lisp code checked doesn't have to be loaded,
|
|
and links can be in the file commentary or elsewhere too. Even
|
|
.elc files can usually be checked successfully if you don't have
|
|
the sources handy."
|
|
(interactive
|
|
(let* ((default (and buffer-file-name
|
|
(file-relative-name buffer-file-name)))
|
|
(prompt (if default
|
|
(format "Filename with wildcards (%s): "
|
|
default)
|
|
"Filename with wildcards: "))
|
|
(pattern (read-file-name prompt nil default))
|
|
;; absolute filenames
|
|
(filename-list (file-expand-wildcards pattern t))
|
|
newlist)
|
|
(setq filename-list
|
|
(dolist (file filename-list (nreverse newlist))
|
|
(or (info-xref-lock-file-p file)
|
|
(file-directory-p file)
|
|
(push file newlist))))
|
|
(unless filename-list
|
|
(error "No files: %S" pattern))
|
|
(list filename-list)))
|
|
|
|
(eval-and-compile
|
|
(require 'help-mode)) ;; for `help-xref-info-regexp'
|
|
|
|
(info-xref-with-output
|
|
(dolist (info-xref-filename filename-list)
|
|
(setq info-xref-xfile-alist nil) ;; "not found"s once per file
|
|
|
|
(info-xref-with-file info-xref-filename
|
|
(goto-char (point-min))
|
|
(while (re-search-forward help-xref-info-regexp nil t)
|
|
(let ((node (match-string 2)))
|
|
(save-excursion
|
|
(goto-char (match-beginning 2)) ;; start of node as error position
|
|
|
|
;; skip nodes with "%" as probably `format' strings such as in
|
|
;; info-look.el
|
|
(unless (string-search "%" node)
|
|
|
|
;; "(emacs)" is the default manual for docstring hyperlinks,
|
|
;; per `help-make-xrefs'
|
|
(unless (string-match "\\`(" node)
|
|
(setq node (concat "(emacs)" node)))
|
|
|
|
(info-xref-check-node node)))))))))
|
|
|
|
|
|
(provide 'info-xref)
|
|
|
|
;;; info-xref.el ends here
|