Chapter 12. Editor Configuration

Adjusting your text editor configuration can make working on document files quicker and easier, and help documents conform to FDP guidelines.

12.1. Vim

Install from editors/vim, editors/vim-console, or editors/vim-tiny then follow the configuration instructions in Configuration.

12.1.1. Use

Press P to reformat paragraphs or text that has been selected in Visual mode. Press T to replace groups of eight spaces with a tab.

12.1.2. Configuration

Edit ~/.vimrc, adding these lines to the end of the file:

if has("autocmd")
    au BufNewFile,BufRead *.sgml,*.ent,*.xsl,*.xml call Set_SGML()
    au BufNewFile,BufRead *.[1-9] call ShowSpecial()
endif " has(autocmd)

function Set_Highlights()
    "match ExtraWhitespace /^\s* \s*\|\s\+$/
    highlight default link OverLength ErrorMsg
    match OverLength /\%71v.\+/
    return 0
endfunction " Set_Highlights()

function ShowSpecial()
    setlocal list listchars=tab:>>,trail:*,eol:$
    hi def link nontext ErrorMsg
    return 0
endfunction " ShowSpecial()

function Set_SGML()
    setlocal number
    syn match sgmlSpecial "&[^;]*;"
    setlocal syntax=sgml
    setlocal filetype=xml
    setlocal shiftwidth=2
    setlocal textwidth=70
    setlocal tabstop=8
    setlocal softtabstop=2
    setlocal formatprg="fmt -p"
    setlocal autoindent
    setlocal smartindent
    " Rewrap paragraphs
    noremap P gqj
    " Replace spaces with tabs
    noremap T :s/        /\t/<CR>
    call ShowSpecial()
    call Set_Highlights()
    return 0
endfunction " Set_SGML()

12.2. Emacs

12.2.1. Validation

Emacs’s nxml-mode uses compact relax NG schemas for validating XML. A compact relax NG schema for FreeBSD’s extension to DocBook 5.0 is included in the documentation repository. To configure nxml-mode to validate using this schema, create ~/.emacs.d/schema/schemas.xml and add these lines to the file:

locatingRules xmlns=""
  documentElement localName="section" typeId="DocBook"
  documentElement localName="chapter" typeId="DocBook"
  documentElement localName="article" typeId="DocBook"
  documentElement localName="book" typeId="DocBook"
  typeId id="DocBook" uri="/usr/local/shared/xml/docbook/5.0/rng/docbook.rnc"

12.2.2. Automated Proofreading with Flycheck and Igor

The Flycheck package is available from Milkypostman’s Emacs Lisp Package Archive (MELPA). If MELPA is not already in Emacs’s packages-archives, it can be added by evaluating

(add-to-list 'package-archives '("melpa" . "") t)

Add the line to Emacs’s initialization file (one of ~/.emacs, ~/.emacs.el, or ~.emacs.d/init.el) to make this change permanent.

To install Flycheck, evaluate

(package-install 'flycheck)

Create a Flycheck checker for textproc/igor by evaluating

(flycheck-define-checker igor
  "FreeBSD Documentation Project sanity checker.

See URLs and"
  :command ("igor" "-X" source-inplace)
  :error-parser flycheck-parse-checkstyle
  :modes (nxml-mode)
  :standard-input t)

  (add-to-list 'flycheck-checkers 'igor 'append)

Again, add these lines to Emacs’s initialization file to make the changes permanent.

12.2.3. FreeBSD Documentation Specific Settings

To apply settings specific to the FreeBSD documentation project, create .dir-locals.el in the root directory of the documentation repository and add these lines to the file:

;;; Directory Local Variables
;;; For more information see (info "(emacs) Directory Variables")

  (eval . (turn-on-auto-fill))
  (fill-column . 70)
  (eval . (require 'flycheck))
  (eval . (flycheck-mode 1))
  (flycheck-checker . igor)
  (eval . (add-to-list 'rng-schema-locating-files "~/.emacs.d/schema/schemas.xml"))))

12.3. nano

12.3.1. Configuration

Copy the sample XML syntax highlight file to the user’s home directory:

% cp /usr/local/shared/nano/xml.nanorc ~/.nanorc

Use an editor to replace the lines in the ~/.nanorc syntax "xml" block with these rules:

syntax "xml" "\.([jrs]html?|xml|xslt?)$"
# trailing whitespace
color ,blue "[[:space:]]+$"
# multiples of eight spaces at the start a line
# (after zero or more tabs) should be a tab
color ,blue "^([TAB]*[ ]{8})+"
# tabs after spaces
color ,yellow "( )+TAB"
# highlight indents that have an odd number of spaces
color ,red "^(([ ]{2})+|(TAB+))*[ ]{1}[^ ]{1}"
# lines longer than 70 characters
color ,yellow "^(.{71})|(TAB.{63})|(TAB{2}.{55})|(TAB{3}.{47}).+$"

Process the file to create embedded tabs:

% perl -i'' -pe 's/TAB/\t/g' ~/.nanorc

12.3.2. Use

Specify additional helpful options when running the editor:

% nano -AKipwz -r 70 -T8 _index.adoc

Users of csh(1) can define an alias in ~/.cshrc to automate these options:

alias nano "nano -AKipwz -r 70 -T8"

After the alias is defined, the options will be added automatically:

% nano _index.adoc

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