最近在玩wiki,很多年前曾经热衷，现在试了试Dokuwiki,wiki太强了，都可以用来代替wordpress做blog了，还节约了一个mysql… 问题是DokuWiki的markup语法与Wikipedia的MediaWiki稍有出入，于是就有人写了这个脚本转格式，还有在线版本。 详见：tips:mediawiki_to_dokuwiki_converter 我稍稍改了一下，作者的习惯真的和我一样，很脏，哈哈：

#! /bin/sh
# Mediawiki2Dokuwiki Converter
# originally by Johannes Buchner <buchner.johannes [at] gmx.at>
# changes by Frederik Tilkin:  - uses sed instead of perl
#    - resolved some bugs ('''''IMPORTANT!!!''''' becomes //**IMPORTANT!!!**//, // becomes <nowiki>//</nowiki> if it is not in a CODE block)
#     - added functionality (multiple lines starting with a space become CODE blocks)
#
# Licence: GPL (http://www.gnu.org/licenses/gpl.txt)
 
# First escape things that are already DokuWiki but not MediaWiki syntax
# // => <nowiki>//</nowiki>  (only when it is NOT in a PREFORMATTED line, and when it is NOT in a LINK [] !)
# ** =>  <nowiki>**</nowiki  (only when it is NOT in a PREFORMATTED line, NOR on the beginning of a line)
# surround preformatted blocks (lines starting with space) with <PRE> so that it's correctly converted to DokuWiki <CODE> blocks later on
 
# My personal need: Made it accept filename as bash variable and append .dokuwiki. Usage: scriptname.sh MediaWikiTxt.txt
 
cat "$1" \
 | sed -r -n '
  #starts with a SPACE, so it is part of a code block, just print and do nothing
  /^[ ]/ { p; d }
  #else: replace ALL **... strings (not at beginning of line)
  s/([^^][^\*]*)(\*\*+)/\1<nowiki>\2<\/nowiki>/g
  #   also replace ALL //... strings 
  s/([^\/]*)(\/\/+)/\1<nowiki>\2<\/nowiki>/g
  #  change the ones that have been replaced in a link [] BACK to normal (do it twice in case [http://addres.com http://address.com] ) [quick and dirty]
  s/([\[][^\[]*)(<nowiki>)(\/\/+)(<\/nowiki>)([^\]]*)/\1\3\5/g ; s/([\[][^\[]*)(<nowiki>)(\/\/+)(<\/nowiki>)([^\]]*)/\1\3\5/g
 
  p
   ' \
 | sed -r -n '
  # See also: http://www.grymoire.com/Unix/Sed.html#uh-40
  #  http://en.wikipedia.org/wiki/Regular_expression
  # This is pretty advanced sed syntax, so I ll try to explain as much as possible
  ################################################################################
 
  # if line starts with a space, add it to the hold buffer
  # we do this by 'branching' to :addtopre
  /^ [ ]*[^ ][^ ]*/ b addtopre
  # if line has only whitespace or is empty, the preformatted block is over, so we surround that with <pre>
  # we do this by 'branching' to :outputpre
  /^[ ]*$/ b outputpre
  # if line starts with NO whitespace, the preformatted block is over, so we surround that with <pre>
  /^[^ ].*$/ b outputpre
 
  #else this is a normal line
    #s/(.*)/NORMAL LINE: \1/g; p
   # print the line
   p
   #delete the current pattern space (so new cycle is started -> jumps to top)
   d
 
  # this is a line that should be part of a CODE block
  :addtopre
   #add it to the hold buffer
   H
    #s/(.*)/ADDED LINE: \1/g; p
   # if this is the last line of the file (end-of-file), empty this line and then output this last preformatted block
   $ { s/.*//g
    b outputpre
   }
   #delete the current pattern space (so new cycle is started -> jumps to top)
   d
  # this is where a paragraph is surrounded by <pre></pre>
  :outputpre
    #s/(.*)/END OF CODE LINE: \1/g; p
   # HOLD buffer is exchanged with the pattern space
   x
 
   # IF not empty, surround with <PRE> and PRINT the pattern space
   /(.+)/ {
    # surround it with <pre>
    s/(.+)/<pre>\1<\/pre>/g
    p
   }
   # exchange pattern space and hold buffer again, pattern is now the current line (not part of the preformatted block) and PRINT this line
   x
   p
   #delete the current pattern space   
   s/.*//g
   #and exchange this again with the hold buffer, so that the hold buffer is empty again   
   x
   #delete the current pattern space (so new cycle is started -> jumps to top)
   d
 ' \
    > mediawiki0
 
# Headings
cat mediawiki0 \
   | sed -r 's/^[ ]*=([^=])/<h1> \1/g' \
   | sed -r 's/([^=])=[ ]*$/\1 <\/h1>/g' \
   | sed -r 's/^[ ]*==([^=])/<h2> \1/g' \
   | sed -r 's/([^=])==[ ]*$/\1 <\/h2>/g' \
   | sed -r 's/^[ ]*===([^=])/<h3> \1/g' \
   | sed -r 's/([^=])===[ ]*$/\1 <\/h3>/g' \
   | sed -r 's/^[ ]*====([^=])/<h4> \1/g' \
   | sed -r 's/([^=])====[ ]*$/\1 <\/h4>/g' \
   | sed -r 's/^[ ]*=====([^=])/<h5> \1/g' \
   | sed -r 's/([^=])=====[ ]*$/\1 <\/h5>/g' \
   | sed -r 's/^[ ]*======([^=])/<h6> \1/g' \
   | sed -r 's/([^=])======[ ]*$/\1 <\/h6>/g' \
   > mediawiki1
 
cat mediawiki1 \
   | sed -r 's/<\/?h1>/======/g' \
   | sed -r 's/<\/?h2>/=====/g' \
   | sed -r 's/<\/?h3>/====/g' \
   | sed -r 's/<\/?h4>/===/g' \
   | sed -r 's/<\/?h5>/==/g' \
   | sed -r 's/<\/?h6>/=/g'  \
   > mediawiki2
 
# lists
cat mediawiki2 \
  | sed -r 's/^[*#][*#][*#][*#]\*/          * /g'  \
  | sed -r 's/^[*#][*#][*#]\*/        * /g'    \
  | sed -r 's/^[*#][*#]\*/      * /g'      \
  | sed -r 's/^[*#]\*/    * /g'        \
  | sed -r 's/^\*/  * /g'                  \
  | sed -r 's/^[*#][*#][*#][*#]#/          - /g'  \
  | sed -r 's/^[*#][*#][*#]#/        - /g'    \
  | sed -r 's/^[*#][*#]#/      - /g'      \
  | sed -r 's/^[*#]#/    - /g'        \
  | sed -r 's/^#/  - /g'                   \
  > mediawiki3
 
 
#[url text] => [url|text]
cat mediawiki3 \
  | sed -r 's/([^[]|^)(\[[^] ]*) ([^]]*\])([^]]|$)/\1\2|\3\4/g' \
  > mediawiki4
 
 
#[link] => [[link]]
cat mediawiki4 \
  | sed -r 's/([^[]|^)(\[[^]]*\])([^]]|$)/\1[\2]\3/g' \
  > mediawiki5
 
# bold, italic
cat mediawiki5 \
  | sed -r "s/'''''(.*)'''''/\/\/**\1**\/\//g" \
  | sed -r "s/'''/**/g" \
  | sed -r "s/''/\/\//g" \
  > mediawiki6
 
# talks
cat mediawiki6 \
  | sed -r "s/^[ ]*:/>/g" \
  | sed -r "s/>:/>>/g" \
  | sed -r "s/>>:/>>>/g" \
  | sed -r "s/>>>:/>>>>/g" \
  | sed -r "s/>>>>:/>>>>>/g" \
  | sed -r "s/>>>>>:/>>>>>>/g" \
  | sed -r "s/>>>>>>:/>>>>>>>/g" \
  > mediawiki7
 
 # code
cat mediawiki7 \
   | sed -r "s/<code>/\'\'/g" \
   | sed -r "s/<\/code>/\'\'/g" \
  > mediawiki8
 
 # pre
cat mediawiki8 \
   | sed -r "s/<pre>/<code>/g" \
   | sed -r "s/<\/pre>/<\/code>/g" \
  > mediawiki9
 
 # combined bold and italic
cat mediawiki9 \
   | sed -r "s/\*\*\/\//\/\/\*\*/g"\
   > mediawiki10
 
cat mediawiki10 > "$1".dokuwiki