Add g:vim_man_cmd to change default man command

Closes #24, closes #32

autoload/man.vim

@@ -44,7 +44,7 @@ function! s:manpage_exists(sect, page)
     return 0
   endif
   let find_arg = man#helpers#find_arg()
-  let where = system('/usr/bin/man '.find_arg.' '.man#helpers#get_cmd_arg(a:sect, a:page))
+  let where = system(g:vim_man_cmd.' '.find_arg.' '.man#helpers#get_cmd_arg(a:sect, a:page))
   if where !~# '^\s*/'
     " result does not look like a file path
     return 0

autoload/man/grep.vim

@@ -126,7 +126,7 @@ function! man#grep#command(path_glob, insensitive_flag, pattern)
   " xargs is used to feed manpages one-by-one
   let command .= 'xargs -I{} -n1 sh -c "manpage={};'
   " inner variables execute within a shell started by xargs
-  let command .= '/usr/bin/man \$manpage 2>/dev/null|col -b|'
+  let command .= g:vim_man_cmd.' \$manpage 2>/dev/null|col -b|'
   " if the first manpage line is blank, remove it (stupid semicolons are required)
   let command .= "sed '1 {;/^\s*$/d;}'|"
   let command .= 'grep '.a:insensitive_flag.' -nE '.a:pattern.'|'

autoload/man/grep/vanilla.vim

@@ -15,7 +15,7 @@ function! man#grep#vanilla#run(bang, insensitive, pattern, files)
   let $MANWIDTH = man#helpers#manwidth()
   let insensitive_flag = a:insensitive ? '-i' : ''
   for file in a:files
-    let output_manfile  = '/usr/bin/man '.file.' | col -b |'
+    let output_manfile  = g:vim_man_cmd.' '.file.' | col -b |'
     let trim_whitespace = "sed '1 {; /^\s*$/d; }' |"
     let grep = 'grep '.insensitive_flag.' -n -E '.a:pattern
     let matches = systemlist(output_manfile . trim_whitespace . grep)

autoload/man/helpers.vim

@@ -69,7 +69,7 @@ function! man#helpers#load_manpage_text(page, section)
   setlocal modifiable
   silent keepj norm! 1GdG
   let $MANWIDTH = man#helpers#manwidth()
-  silent exec 'r!/usr/bin/man '.man#helpers#get_cmd_arg(a:section, a:page). ' 2>/dev/null | col -b'
+  silent exec 'r!'.g:vim_man_cmd.' '.man#helpers#get_cmd_arg(a:section, a:page). ' 2>/dev/null | col -b'
   call s:remove_blank_lines_from_top_and_bottom()
   setlocal filetype=man
   setlocal nomodifiable

doc/man.txt

@@ -110,7 +110,12 @@ in your |vimrc|:
 >
   map <leader>v <Plug>(Vman)
 <
+OPTIONS						*man-options*
 
+Default man command is '/usr/bin/man', but it can be changed:
+>
+  let g:vim_man_cmd = 'LANG=ja_JP.UTF-8 /usr/bin/man'
+<
 CONTRIBUTING					*man-contributing* *man-bugs*
 
 Contributing and bug fixes are welcome. If you have an idea for a new feature

plugin/man.vim

@@ -6,6 +6,10 @@ let g:loaded_man = 1
 let s:save_cpo = &cpo
 set cpo&vim
 
+if !exists('g:vim_man_cmd')
+  let g:vim_man_cmd='/usr/bin/man'
+endif
+
 command! -nargs=* -bar -complete=customlist,man#completion#run Man  call man#get_page('horizontal', <f-args>)
 command! -nargs=* -bar -complete=customlist,man#completion#run Sman call man#get_page('horizontal', <f-args>)
 command! -nargs=* -bar -complete=customlist,man#completion#run Vman call man#get_page('vertical',   <f-args>)