Merge pull request #16 from ieei/waf

Add support for [waf](https://github.com/waf-project/waf) build system and bundled build programs. Thanks @ieei.

README.md

@@ -101,6 +101,10 @@ To try the build file in the current directory before searching from the file di
 
     let g:makeshift_use_pwd_first = 1
 
+To enable search for bundled build program/script:
+
+    let g:makeshift_find_bundled = 1
+
 Build Systems
 -------------
 
@@ -116,6 +120,7 @@ Makeshift currently associates the following files with their build systems:
     * mix.exs: mix
     * pom.xml: mvn
     * build.ninja: ninja
+    * wscript: waf
 
 Adding a new build system
 -------------------------

doc/makeshift.txt

@@ -95,10 +95,16 @@ To automatically change directory to 'b:makeshift_root' when it is discovered:
                                                    *'makeshift_use_pwd_first'*
 
 To try the build file in the current directory before searching from the file
-directory:
->
+directory: >
+
     let g:makeshift_use_pwd_first = 1
 <
+                                                   *'makeshift_find_bundled'*
+
+To enable search for bundled build program/script: >
+
+    let g:makeshift_find_bundled = 1
+
 ==============================================================================
 
 BUILD SYSTEMS                                              *makeshift-systems*
@@ -113,6 +119,8 @@ Makeshift currently associates the following files with their build systems:
     * build.xml: ant
     * mix.exs: mix
     * pom.xml: mvn
+    * build.ninja: ninja
+    * wscript: waf
 
 ==============================================================================
 
@@ -124,7 +132,7 @@ If Makeshift doesn't already know about your build system, or you wish to
 override the default program for a given file, you can define a dictionary,
 which has filenames as keys and corresponding programs as values. >
     let g:makeshift_systems = {
-        \'build.ninja ': 'ninja',
+        \'build.sbt ': 'sbt',
         \}
 <
 

plugin/makeshift.vim

@@ -19,6 +19,7 @@ function! s:build_defaults()
                 \'mix.exs': 'mix',
                 \'pom.xml': 'mvn',
                 \'build.ninja': 'ninja',
+                \'wscript': 'waf',
                 \}
 endfunction
 
@@ -57,9 +58,21 @@ function! s:determine_build_system(dir)
     return ''
 endfunction
 
+function! s:find_bundled(program)
+    let l:bundled = globpath(b:makeshift_root, a:program)
+    if filereadable(l:bundled)
+        return l:bundled
+    endif
+    return a:program
+endfunction
+
 function! s:set_makeprg(program)
     if len(a:program)
-        let &l:makeprg=a:program
+        if exists('g:makeshift_find_bundled') && g:makeshift_find_bundled
+            let &l:makeprg = s:find_bundled(a:program)
+        else
+            let &l:makeprg = a:program
+        endif
     endif
 endfunction