Add a new default sh interpreter template which guesses shell from shebang

Fix #69

Author: xuhdev

autoload/SingleCompile.vim

@@ -1,4 +1,4 @@
-" Copyright (C) 2010-2014 Hong Xu
+" Copyright (C) 2010-2015 Hong Xu
 
 " This file is part of SingleCompile.
 
@@ -401,6 +401,20 @@ function! SingleCompile#PredoMicrosoftVC(compiling_info) " MSVC Predo {{{2
     return l:new_compiling_info
 endfunction
 
+function! SingleCompile#PredoShell(compiling_info) " shell predo {{{2
+    let l:new_compiling_info = a:compiling_info
+
+    let l:shebang = getline(1)
+    if l:shebang !~ '#!/.*' " don't change anything if no shebang is found
+        return a:compiling_info
+    endif
+
+    " Use the shell indicated by the shebang
+    let l:new_compiling_info['command'] = matchstr(l:shebang, '#!\zs/.*')
+
+    return l:new_compiling_info
+endfunction
+
 " post-do functions {{{1
 function! SingleCompile#PostdoWatcom(compiling_info) " watcom pre-do {{{2
     let $PATH = s:old_path

autoload/SingleCompile/templates/sh.vim

@@ -1,4 +1,4 @@
-" Copyright (C) 2010-2012 Hong Xu
+" Copyright (C) 2010-2015 Hong Xu
 
 " This file is part of SingleCompile.
 
@@ -18,6 +18,11 @@
 " check doc/SingleCompile.txt for more information
 
 function! SingleCompile#templates#sh#Initialize()
+    call SingleCompile#SetCompilerTemplate('sh', 'shell',
+                \'Guess from shebang', 'sh', '', '')
+    call SingleCompile#SetPriority('sh', 'shell', 10)
+    call SingleCompile#SetPredo('sh', 'shell',
+                \function('SingleCompile#PredoShell'))
     call SingleCompile#SetCompilerTemplate('sh', 'sh',
                 \'Bourne Shell', 'sh', '', '')
     call SingleCompile#SetPriority('sh', 'sh', 80)