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+" vimball : construct a file containing both paths and files
+" Author: Charles E. Campbell, Jr.
+" Date:   Mar 20, 2006
+" Version: 4
+" GetLatestVimScripts: 1502 1 :AutoInstall: vimball.vim
+" Copyright: (c) 2004-2006 by Charles E. Campbell, Jr.
+"            The VIM LICENSE applies to Vimball.vim, and Vimball.txt
+"            (see |copyright|) except use "Vimball" instead of "Vim".
+"            No warranty, express or implied.
+"  *** ***   Use At-Your-Own-Risk!   *** ***
+
+" ---------------------------------------------------------------------
+"  Load Once: {{{1
+if &cp || exists("g:loaded_vimball")
+ finish
+endif
+let s:keepcpo        = &cpo
+let g:loaded_vimball = "v4"
+set cpo&vim
+
+" =====================================================================
+"  Functions: {{{1
+
+" ---------------------------------------------------------------------
+" MkVimball: creates a vimball given a list of paths to files {{{2
+" Vimball Format:
+"     path
+"     filesize
+"     [file]
+"     path
+"     filesize
+"     [file]
+fun! vimball#MkVimball(line1,line2,writelevel,vimballname) range
+"  call Dfunc("MkVimball(line1=".a:line1." line2=".a:line2." writelevel=".a:writelevel." vimballname<".a:vimballname.">")
+  let vbname= substitute(a:vimballname,'\.[^.]*$','','e').'.vba'
+  if !a:writelevel && filereadable(vbname)
+   echohl Error | echoerr "(MkVimball) file<".vbname."> exists; use ! to insist" | echohl None
+"   call Dret("MkVimball : file<".vbname."> already exists; use ! to insist")
+   return
+  endif
+
+  " user option bypass
+  let eikeep= &ei
+  set ei=all
+
+  let home   = substitute(&rtp,',.*$','','')
+  let curdir = getcwd()
+  exe "cd ".home
+
+  " record current tab, initialize while loop index
+  let curtabnr = tabpagenr()
+  let linenr   = a:line1
+"  call Decho("curtabnr=".curtabnr)
+
+  while linenr <= a:line2
+   let svfile  = getline(linenr)
+"   call Decho("svfile<".svfile.">")
+ 
+   if !filereadable(svfile)
+    echohl Error | echo "unable to read file<".svfile.">" | echohl None
+    let &ei= eikeep
+    exe "cd ".curdir
+"    call Dret("MkVimball")
+    return
+   endif
+ 
+   " create/switch to mkvimball tab
+   if !exists("vbtabnr")
+    tabnew
+    silent! file Vimball
+    let vbtabnr= tabpagenr()
+   else
+    exe "tabn ".vbtabnr
+   endif
+ 
+   let lastline= line("$") + 1
+   if lastline == 2 && getline("$") == ""
+	call setline(1,'" Vimball Archiver by Charles E. Campbell, Jr., Ph.D.')
+	call setline(2,'UseVimball')
+	call setline(3,'finish')
+	let lastline= 4
+   endif
+   call setline(lastline  ,svfile)
+   call setline(lastline+1,0)
+   exe "$r ".svfile
+   call setline(lastline+1,line("$") - lastline - 1)
+"   call Decho("lastline=".lastline." line$=".line("$"))
+
+  " restore to normal tab
+   exe "tabn ".curtabnr
+   let linenr= linenr + 1
+  endwhile
+
+  " write the vimball
+  exe "tabn ".vbtabnr
+  exe "cd ".curdir
+  if a:really
+   if a:writelevel
+    exe "w! ".vbname
+   else
+    exe "w ".vbname
+   endif
+  endif
+"  call Decho("Vimball<".vbname."> created")
+  echo "Vimball<".vbname."> created"
+
+  " remove the evidence
+  setlocal nomod bh=wipe
+  exe "tabn ".curtabnr
+  exe "tabc ".vbtabnr
+
+  " restore options
+  let &ei= eikeep
+
+"  call Dret("MkVimball")
+endfun
+
+" ---------------------------------------------------------------------
+" Vimball: {{{2
+fun! vimball#Vimball(really)
+"  call Dfunc("Vimball(really=".a:really.")")
+
+  if getline(1) !~ '^" Vimball Archiver by Charles E. Campbell, Jr., Ph.D.$'
+   echoerr "(Vimball) The current file does not appear to be a Vimball!"
+"   call Dret("Vimball")
+   return
+  endif
+
+  " initialize
+  let regakeep = @a
+  let eikeep   = &ei
+  let vekeep   = &ve
+  let makeep   = getpos("'a")
+  let curtabnr = tabpagenr()
+  set ei=all ve=all
+
+  " set up vimball tab
+  tabnew
+  silent! file Vimball
+  let vbtabnr= tabpagenr()
+  let didhelp= ""
+
+  " go to vim plugin home
+  let home   = substitute(&rtp,',.*$','','')
+  let curdir = getcwd()
+"  call Decho("exe cd ".home)
+  exe "cd ".home
+  let linenr  = 4
+  let filecnt = 0
+
+  " give title to listing of (extracted) files from Vimball Archive
+  if a:really
+   echohl Title | echomsg "Vimball Archive" | echohl None
+  else
+   echohl Title | echomsg "Vimball Archive Listing" | echohl None
+  endif
+
+  " apportion vimball contents to various files
+"  call Decho("exe tabn ".curtabnr)
+  exe "tabn ".curtabnr
+"  call Decho("linenr=".linenr." line$=".line("$"))
+  while 1 < linenr && linenr < line("$")
+   let fname   = getline(linenr)
+   let fsize   = getline(linenr+1)
+   let filecnt = filecnt + 1
+   if a:really
+    echomsg "extracted <".fname.">: ".fsize." lines"
+   else
+    echomsg "would extract <".fname.">: ".fsize." lines"
+   endif
+"   call Decho(linenr.": will extract file<".fname.">")
+"   call Decho((linenr+1).": fsize=".fsize)
+
+   " make directories if they don't exist yet
+   let fnamebuf= fname
+   while fnamebuf =~ '/'
+   	let dirname  = substitute(fnamebuf,'/.*$','','e')
+   	let fnamebuf = substitute(fnamebuf,'^.\{-}/\(.*\)$','\1','e')
+	if !isdirectory(dirname)
+"	 call Decho("making <".dirname.">")
+	 call mkdir(dirname)
+	endif
+	exe "cd ".dirname
+   endwhile
+   exe "cd ".home
+
+   " grab specified qty of lines and place into "a" buffer
+   exe linenr
+   norm! jjma
+   exe (linenr + fsize + 1)
+   silent norm! "ay'a
+"   call Decho("yanked ".fsize." lines into register-a")
+
+"   call Decho("didhelp<".didhelp."> fname<".fname.">")
+   if didhelp == "" && fname =~ 'doc/[^/]\+\.txt$'
+   	let didhelp= substitute(fname,'^\(.*\<doc\)[/\\][^.]*\.txt$','\1','e')
+"	call Decho("didhelp<".didhelp.">")
+   endif
+
+   " copy "a" buffer into tab
+"   call Decho('copy "a buffer into tab#'.vbtabnr)
+   exe "tabn ".vbtabnr
+   silent! %d
+   silent norm! "aPGdd1G
+"   call Decho("rega<".@a.">")
+
+   " write tab to file
+"   call Decho("exe w! ".fname)
+   exe "silent w! ".fname
+
+"   call Decho("exe tabn ".curtabnr)
+   exe "tabn ".curtabnr
+"   let oldlinenr = linenr " Decho
+   let linenr    = linenr + fsize + 2
+"   call Decho("update linenr= [linenr=".oldlinenr."] + [fsize=".fsize."] + 2 = ".linenr)
+  endwhile
+
+  " set up help
+"  call Decho("about to set up help: didhelp<".didhelp.">")
+  if didhelp != ""
+"   call Decho("exe helptags ".home."/".didhelp)
+   exe "helptags ".home."/".didhelp
+   echomsg "did helptags"
+  endif
+
+  " make sure a "Press ENTER..." prompt appears to keep the messages showing!
+  while filecnt < &ch
+   echomsg " "
+   let filecnt= filecnt + 1
+  endwhile
+
+  " restore events, delete tab and buffer
+  exe "tabn ".vbtabnr
+  setlocal nomod bh=wipe
+  exe "tabn ".curtabnr
+  exe "tabc ".vbtabnr
+  let &ei= eikeep
+  let @a = regakeep
+  if makeep[0] != 0
+   " restore mark a
+"   call Decho("restore mark-a: makeep=".string(makeep))
+   call setpos("'a",makeep)
+   ka
+  endif
+  exe "cd ".curdir
+
+"  call Dret("Vimball")
+endfun
+
+let &cpo= s:keepcpo
+unlet s:keepcpo
+" =====================================================================
+" Modelines: {{{1
+" vim: fdm=marker