" ---------------------------------------------------------------------
" getscript.vim
"  Author:	Charles E. Campbell, Jr.
"  Date:	May 05, 2007
"  Version:	25
"  Installing:	:help glvs-install
"  Usage:	:help glvs
"
" GetLatestVimScripts: 642 1 :AutoInstall: getscript.vim
" ---------------------------------------------------------------------
" Initialization:	{{{1
" if you're sourcing this file, surely you can't be
" expecting vim to be in its vi-compatible mode
if &cp
 echoerr "GetLatestVimScripts is not vi-compatible; not loaded (you need to set nocp)"
 finish
endif
let s:keepcpo = &cpo
set cpo&vim
"DechoTabOn

if exists("g:loaded_getscript")
 finish
endif
let g:loaded_getscript= "v25"

" ---------------------------------------------------------------------
"  Global Variables: {{{1
" allow user to change the command for obtaining scripts (does fetch work?)
if !exists("g:GetLatestVimScripts_wget")
 if executable("wget")
  let g:GetLatestVimScripts_wget= "wget"
 elseif executable("curl")
  let g:GetLatestVimScripts_wget= "curl"
 else
  let g:GetLatestVimScripts_wget    = 'echo "GetLatestVimScripts needs wget or curl"'
  let g:GetLatestVimScripts_options = ""
 endif
endif

" options that wget and curl require:
if !exists("g:GetLatestVimScripts_options")
 if g:GetLatestVimScripts_wget == "wget"
  let g:GetLatestVimScripts_options= "-q -O"
 elseif g:GetLatestVimScripts_wget == "curl"
  let g:GetLatestVimScripts_options= "-s -O"
 else
  let g:GetLatestVimScripts_options= ""
 endif
endif

" by default, allow autoinstall lines to work
if !exists("g:GetLatestVimScripts_allowautoinstall")
 let g:GetLatestVimScripts_allowautoinstall= 1
endif

"" For debugging:
"let g:GetLatestVimScripts_wget    = "echo"
"let g:GetLatestVimScripts_options = "options"

" ---------------------------------------------------------------------
" Check If AutoInstall Capable: {{{1
let s:autoinstall= ""
if g:GetLatestVimScripts_allowautoinstall

 if (has("win32") || has("gui_win32") || has("gui_win32s") || has("win16") || has("win64") || has("win32unix") || has("win95")) && &shell != "bash"
  " windows (but not cygwin/bash)
  let s:dotvim= "vimfiles"
  if !exists("g:GetLatestVimScripts_mv")
   let g:GetLatestVimScripts_mv= "ren"
  endif

 else
  " unix
  let s:dotvim= ".vim"
  if !exists("g:GetLatestVimScripts_mv")
   let g:GetLatestVimScripts_mv= "mv"
  endif
 endif

 if exists('$HOME') && isdirectory(expand("$HOME")."/".s:dotvim)
  let s:autoinstall= $HOME."/".s:dotvim
 endif
" call Decho("s:autoinstall<".s:autoinstall.">")
"else "Decho
" call Decho("g:GetLatestVimScripts_allowautoinstall=".g:GetLatestVimScripts_allowautoinstall.": :AutoInstall: disabled")
endif

" ---------------------------------------------------------------------
"  Public Interface: {{{1
com!        -nargs=0 GetLatestVimScripts call getscript#GetLatestVimScripts()
com!        -nargs=0 GetScript           call getscript#GetLatestVimScripts()
silent! com -nargs=0 GLVS                call getscript#GetLatestVimScripts()

" ---------------------------------------------------------------------
"  GetOneScript: (Get Latest Vim Script) this function operates {{{1
"    on the current line, interpreting two numbers and text as
"    ScriptID, SourceID, and Filename.
"    It downloads any scripts that have newer versions from vim.sf.net.
fun! s:GetOneScript(...)
"   call Dfunc("GetOneScript()")

 " set options to allow progress to be shown on screen
  let t_ti= &t_ti
  let t_te= &t_te
  let rs  = &rs
  set t_ti= t_te= nors

 " put current line on top-of-screen and interpret it into
 " a      script identifer  : used to obtain webpage
 "        source identifier : used to identify current version
 " and an associated comment: used to report on what's being considered
  if a:0 >= 3
   let scriptid = a:1
   let srcid    = a:2
   let fname    = a:3
   let cmmnt    = ""
"   call Decho("scriptid<".scriptid.">")
"   call Decho("srcid   <".srcid.">")
"   call Decho("fname   <".fname.">")
  else
   let curline  = getline(".")
   if curline =~ '^\s*#'
"    call Dret("GetOneScript : skipping a pure comment line")
    return
   endif
   let parsepat = '^\s*\(\d\+\)\s\+\(\d\+\)\s\+\(.\{-}\)\(\s*#.*\)\=$'
   try
    let scriptid = substitute(curline,parsepat,'\1','e')
   catch /^Vim\%((\a\+)\)\=:E486/
    let scriptid= 0
   endtry
   try
    let srcid    = substitute(curline,parsepat,'\2','e')
   catch /^Vim\%((\a\+)\)\=:E486/
    let srcid= 0
   endtry
   try
    let fname= substitute(curline,parsepat,'\3','e')
   catch /^Vim\%((\a\+)\)\=:E486/
    let fname= ""
   endtry
   try
    let cmmnt= substitute(curline,parsepat,'\4','e')
   catch /^Vim\%((\a\+)\)\=:E486/
    let cmmnt= ""
   endtry
"   call Decho("curline <".curline.">")
"   call Decho("parsepat<".parsepat.">")
"   call Decho("scriptid<".scriptid.">")
"   call Decho("srcid   <".srcid.">")
"   call Decho("fname   <".fname.">")
  endif

  if scriptid == 0 || srcid == 0
   " When looking for :AutoInstall: lines, skip scripts that
   " have  0 0 scriptname
"   call Dret("GetOneScript : skipping a scriptid==srcid==0 line")
   return
  endif

  let doautoinstall= 0
  if fname =~ ":AutoInstall:"
"   call Decho("fname<".fname."> has :AutoInstall:...")
   let aicmmnt= substitute(fname,'\s\+:AutoInstall:\s\+',' ','')
"   call Decho("aicmmnt<".aicmmnt."> s:autoinstall=".s:autoinstall)
   if s:autoinstall != ""
    let doautoinstall = g:GetLatestVimScripts_allowautoinstall
   endif
  else
   let aicmmnt= fname
  endif
"  call Decho("aicmmnt<".aicmmnt.">: doautoinstall=".doautoinstall)

  exe "norm z\<CR>"
  redraw!
"  call Decho('considering <'.aicmmnt.'> scriptid='.scriptid.' srcid='.srcid)
  echomsg 'considering <'.aicmmnt.'> scriptid='.scriptid.' srcid='.srcid

  " grab a copy of the plugin's vim.sf.net webpage
  let scriptaddr = 'http://vim.sf.net/script.php?script_id='.scriptid
  let tmpfile    = tempname()
  let v:errmsg   = ""

  " make three tries at downloading the description
  let itry= 1
  while itry <= 3
"   	call Decho("try#".itry." to download description of <".aicmmnt."> with addr=".scriptaddr)
  	if has("win32") || has("win16") || has("win95")
"     call Decho("silent !".g:GetLatestVimScripts_wget." ".g:GetLatestVimScripts_options." ".tmpfile.' "'.scriptaddr.'"')
     exe "silent !".g:GetLatestVimScripts_wget." ".g:GetLatestVimScripts_options." ".tmpfile.' "'.scriptaddr.'"'
	else
"     call Decho("silent !".g:GetLatestVimScripts_wget." ".g:GetLatestVimScripts_options." ".tmpfile." '".scriptaddr."'")
     exe "silent !".g:GetLatestVimScripts_wget." ".g:GetLatestVimScripts_options." ".tmpfile." '".scriptaddr."'"
	endif
	if itry == 1
    exe "silent vsplit ".tmpfile
	else
	 silent! e %
	endif
  
   " find the latest source-id in the plugin's webpage
   silent! 1
   let findpkg= search('Click on the package to download','W')
   if findpkg > 0
    break
   endif
   let itry= itry + 1
  endwhile
"  call Decho(" --- end downloading tries while loop --- itry=".itry)

  " testing: did finding /Click on the package.../ fail?
  if findpkg == 0 || itry >= 4
    silent q!
    call delete(tmpfile)
   " restore options
	let &t_ti        = t_ti
	let &t_te        = t_te
	let &rs          = rs
	let s:downerrors = s:downerrors + 1
"  	call Decho("***warning*** couldn'".'t find "Click on the package..." in description page for <'.aicmmnt.">")
  	echomsg "***warning*** couldn'".'t find "Click on the package..." in description page for <'.aicmmnt.">"
"	call Dret("GetOneScript : srch for /Click on the package/ failed")
  	return
  endif
"  call Decho('found "Click on the package to download"')

  let findsrcid= search('src_id=','W')
  if findsrcid == 0
    silent q!
    call delete(tmpfile)
   " restore options
	let &t_ti        = t_ti
	let &t_te        = t_te
	let &rs          = rs
	let s:downerrors = s:downerrors + 1
"  	call Decho("***warning*** couldn'".'t find "src_id=" in description page for <'.aicmmnt.">")
  	echomsg "***warning*** couldn'".'t find "src_id=" in description page for <'.aicmmnt.">"
"	call Dret("GetOneScript : srch for /src_id/ failed")
  	return
  endif
"  call Decho('found "src_id=" in description page')

  let srcidpat   = '^\s*<td class.*src_id=\(\d\+\)">\([^<]\+\)<.*$'
  let latestsrcid= substitute(getline("."),srcidpat,'\1','')
  let fname      = substitute(getline("."),srcidpat,'\2','')
"  call Decho("srcidpat<".srcidpat."> latestsrcid<".latestsrcid."> fname<".fname.">")
  silent q!
  call delete(tmpfile)

  " convert the strings-of-numbers into numbers
  let srcid       = srcid       + 0
  let latestsrcid = latestsrcid + 0
"   call Decho("srcid=".srcid." latestsrcid=".latestsrcid." fname<".fname.">")

  " has the plugin's most-recent srcid increased, which indicates
  " that it has been updated
  if latestsrcid > srcid
   let s:downloads= s:downloads + 1
   if fname == bufname("%")
    " GetLatestVimScript has to be careful about downloading itself
    let fname= "NEW_".fname
   endif

   " the plugin has been updated since we last obtained it, so download a new copy
"   call Decho("...downloading new <".fname.">")
   echomsg "...downloading new <".fname.">"
   if has("win32") || has("gui_win32") || has("gui_win32s") || has("win16") || has("win64") || has("win32unix") || has("win95")
"    call Decho("windows: silent !".g:GetLatestVimScripts_wget." ".g:GetLatestVimScripts_options." ".fname.' "'.'http://vim.sf.net/scripts/download_script.php?src_id='.latestsrcid.'"')
    exe "silent !".g:GetLatestVimScripts_wget." ".g:GetLatestVimScripts_options." ".fname.' "'.'http://vim.sf.net/scripts/download_script.php?src_id='.latestsrcid.'"'
   else
"    call Decho("unix: silent !".g:GetLatestVimScripts_wget." ".g:GetLatestVimScripts_options." ".fname." '".'http://vim.sf.net/scripts/download_script.php?src_id='.latestsrcid."'")
    exe "silent !".g:GetLatestVimScripts_wget." ".g:GetLatestVimScripts_options." ".fname." '".'http://vim.sf.net/scripts/download_script.php?src_id='.latestsrcid."'"
   endif

   " AutoInstall: only if doautoinstall is so indicating
   if doautoinstall
"   	call Decho("attempting to do autoinstall: getcwd<".getcwd()."> filereadable(".fname.")=".filereadable(fname))
	if filereadable(fname)
"	 call Decho("move <".fname."> to ".s:autoinstall)
   	 exe "silent !".g:GetLatestVimScripts_mv." ".fname." ".s:autoinstall
	 let curdir= escape(substitute(getcwd(),'\','/','ge'),"|[]*'\" #")
"	 call Decho("exe cd ".s:autoinstall)
	 exe "cd ".s:autoinstall

	 " decompress
	 if fname =~ '\.bz2$'
"	  call Decho("attempt to bunzip2 ".fname)
	  exe "silent !bunzip2 ".fname
	  let fname= substitute(fname,'\.bz2$','','')
"	  call Decho("new fname<".fname."> after bunzip2")
	 elseif fname =~ '\.gz$'
"	  call Decho("attempt to gunzip ".fname)
	  exe "silent !gunzip ".fname
	  let fname= substitute(fname,'\.gz$','','')
"	  call Decho("new fname<".fname."> after gunzip")
	 endif

	 " distribute archive(.zip, .tar, .vba) contents
	 if fname =~ '\.zip$'
"	  call Decho("attempt to unzip ".fname)
	  exe "silent !unzip -o ".fname
	 elseif fname =~ '\.tar$'
"	  call Decho("attempt to untar ".fname)
	  exe "silent !tar -xvf ".fname
	 elseif fname =~ '\.vba$'
"	  call Decho("attempt to handle a vimball: ".fname)
          1split
	  exe "e ".fname
	  so %
	  q
	 endif

	 if fname =~ '.vim$'
"	  call Decho("attempt to simply move ".fname." to plugin")
	  exe "silent !".g:GetLatestVimScripts_mv." ".fname." plugin"
	 endif

	 " helptags step
	 let docdir= substitute(&rtp,',.*','','e')."/doc"
"	 call Decho("helptags docdir<".docdir.">")
	 exe "helptags ".docdir
	 exe "cd ".curdir
	endif
   endif

   " update the data in the <GetLatestVimScripts.dat> file
   let modline=scriptid." ".latestsrcid." ".fname.cmmnt
   call setline(line("."),modline)
"   call Decho("update data in ".expand("%")."#".line(".").": modline<".modline.">")
  endif

 " restore options
  let &t_ti= t_ti
  let &t_te= t_te
  let &rs  = rs

"  call Dret("GetOneScript")
endfun

" ---------------------------------------------------------------------
" GetLatestVimScripts: this function gets the latest versions of {{{1
"                      scripts based on the list in
"   (first dir in runtimepath)/GetLatest/GetLatestVimScripts.dat
fun! getscript#GetLatestVimScripts()
"  call Dfunc("GetLatestVimScripts() autoinstall<".s:autoinstall.">")

" insure that wget is executable
  if executable(g:GetLatestVimScripts_wget) != 1
   echoerr "GetLatestVimScripts needs ".g:GetLatestVimScripts_wget." which apparently is not available on your system"
"   call Dret("GetLatestVimScripts : wget not executable/availble")
   return
  endif

  " Find the .../GetLatest subdirectory under the runtimepath
  for datadir in split(&rtp,',') + ['']
   if isdirectory(datadir."/GetLatest")
"    call Decho("found directory<".datadir.">")
    let datadir= datadir . "/GetLatest"
    break
   endif
   if filereadable(datadir."GetLatestVimScripts.dat")
"    call Decho("found ".datadir."/GetLatestVimScripts.dat")
    break
   endif
  endfor

  " Sanity checks: readability and writability
  if datadir == ""
   echoerr 'Missing "GetLatest/" on your runtimepath - see :help glvs-dist-install'
"   call Dret("GetLatestVimScripts : unable to find a GetLatest subdirectory")
   return
  endif

  if filewritable(datadir) != 2
   echoerr "(getLatestVimScripts) Your ".datadir." isn't writable"
"   call Dret("GetLatestVimScripts : non-writable directory<".datadir.">")
   return
  endif
  let datafile= datadir."/GetLatestVimScripts.dat"
  if !filereadable(datafile)
   echoerr "Your data file<".datafile."> isn't readable"
"   call Dret("GetLatestVimScripts : non-readable datafile<".datafile.">")
   return
  endif
  if !filewritable(datafile)
   echoerr "Your data file<".datafile."> isn't writable"
"   call Dret("GetLatestVimScripts : non-writable datafile<".datafile.">")
   return
  endif
"  call Decho("datadir  <".datadir.">")
"  call Decho("datafile <".datafile.">")

  " don't let any events interfere (like winmanager's, taglist's, etc)
  let eikeep= &ei
  set ei=all

  " record current directory, change to datadir, open split window with
  " datafile
  let origdir= getcwd()
  exe "cd ".escape(substitute(datadir,'\','/','ge'),"|[]*'\" #")
  split
  exe "e ".escape(substitute(datafile,'\','/','ge'),"|[]*'\" #")
  res 1000
  let s:downloads = 0
  let s:downerrors= 0

  " Check on dependencies mentioned in plugins
"  call Decho(" ")
"  call Decho("searching plugins for GetLatestVimScripts dependencies")
  let lastline    = line("$")
"  call Decho("lastline#".lastline)
  let plugins     = split(globpath(&rtp,"plugin/*.vim"))
  let foundscript = 0
  let firstdir= ""

  for plugin in plugins

   " don't process plugins in system directories
   if firstdir == ""
    let firstdir= substitute(plugin,'[/\\][^/\\]\+$','','')
"    call Decho("firstdir<".firstdir.">")
   else
    let curdir= substitute(plugin,'[/\\][^/\\]\+$','','')
"    call Decho("curdir<".curdir.">")
    if curdir != firstdir
     break
    endif
   endif

   " read plugin in
   $
"   call Decho(" ")
"   call Decho(".dependency checking<".plugin."> line$=".line("$"))
   exe "silent r ".plugin

   while search('^"\s\+GetLatestVimScripts:\s\+\d\+\s\+\d\+','W') != 0
    let newscript= substitute(getline("."),'^"\s\+GetLatestVimScripts:\s\+\d\+\s\+\d\+\s\+\(.*\)$','\1','e')
    let llp1     = lastline+1
"    call Decho("..newscript<".newscript.">")

    " don't process ""GetLatestVimScripts lines
    if newscript !~ '^"'
     " found a "GetLatestVimScripts: # #" line in the script; check if its already in the datafile
     let curline     = line(".")
     let noai_script = substitute(newscript,'\s*:AutoInstall:\s*','','e')
     exe llp1
     let srchline    = search('\<'.noai_script.'\>','bW')
"     call Decho("..noai_script<".noai_script."> srch=".srchline."curline#".line(".")." lastline#".lastline)

     if srchline == 0
      " found a new script to permanently include in the datafile
      let keep_rega   = @a
      let @a          = substitute(getline(curline),'^"\s\+GetLatestVimScripts:\s\+','','')
      exe lastline."put a"
      echomsg "Appending <".@a."> to ".datafile." for ".newscript
"      call Decho("..APPEND (".noai_script.")<".@a."> to GetLatestVimScripts.dat")
      let @a          = keep_rega
      let lastline    = llp1
      let curline     = curline     + 1
      let foundscript = foundscript + 1
"     else	" Decho
"      call Decho("..found <".noai_script."> (already in datafile at line#".srchline.")")
     endif

     let curline = curline + 1
     exe curline
    endif
   endwhile

   let llp1= lastline + 1
"   call Decho(".deleting lines: ".llp1.",$d")
   exe "silent! ".llp1.",$d"
  endfor
"  call Decho("--- end dependency checking loop ---  foundscript=".foundscript)
"  call Decho(" ")

  if foundscript == 0
   set nomod
  endif

  " Check on out-of-date scripts using GetLatest/GetLatestVimScripts.dat
"  call Decho("begin: checking out-of-date scripts using datafile<".datafile.">")
  set lz
  1
"  /^-----/,$g/^\s*\d/call Decho(getline("."))
  1
  /^-----/,$g/^\s*\d/call s:GetOneScript()
"  call Decho("--- end out-of-date checking --- ")

  " Final report (an echomsg)
  try
   silent! ?^-------?
  catch /^Vim\%((\a\+)\)\=:E114/
"   call Dret("GetLatestVimScripts : nothing done!")
   return
  endtry
  exe "norm! kz\<CR>"
  redraw!
  let s:msg = ""
  if s:downloads == 1
  let s:msg = "Downloaded one updated script to <".datadir.">"
  elseif s:downloads == 2
   let s:msg= "Downloaded two updated scripts to <".datadir.">"
  elseif s:downloads > 1
   let s:msg= "Downloaded ".s:downloads." updated scripts to <".datadir.">"
  else
   let s:msg= "Everything was already current"
  endif
  if s:downerrors > 0
   let s:msg= s:msg." (".s:downerrors." downloading errors)"
  endif
  echomsg s:msg
  " save the file
  if &mod
   silent! w!
  endif
  q

  " restore events and current directory
  exe "cd ".escape(substitute(origdir,'\','/','ge'),"|[]*'\" #")
  let &ei= eikeep
  set nolz
"  call Dret("GetLatestVimScripts : did ".s:downloads." downloads")
endfun
" ---------------------------------------------------------------------

" Restore Options: {{{1
let &cpo= s:keepcpo

" vim: ts=8 sts=2 fdm=marker nowrap
