" Author: Andrew Lee <andrewl@mbda.fun>.
" Inspired by ale/gradle.vim by Michael Pardo <michael@michaelpardo.com>
" Description: Functions for working with Ant projects.

" Given a buffer number, find an Ant project root
function! ale#ant#FindProjectRoot(buffer) abort
    let l:build_xml_path = ale#path#FindNearestFile(a:buffer, 'build.xml')

    if !empty(l:build_xml_path)
        return fnamemodify(l:build_xml_path, ':h')
    endif

    return ''
endfunction

" Given a buffer number, find the path to the `ant` executable. Returns an empty
" string if cannot find the executable.
function! ale#ant#FindExecutable(buffer) abort
    if executable('ant')
        return 'ant'
    endif

    return ''
endfunction

" Given a buffer number, build a command to print the classpath of the root
" project. Returns an empty string if cannot build the command.
function! ale#ant#BuildClasspathCommand(buffer) abort
    let l:executable = ale#ant#FindExecutable(a:buffer)
    let l:project_root = ale#ant#FindProjectRoot(a:buffer)

    if !empty(l:executable) && !empty(l:project_root)
        return ale#path#CdString(l:project_root)
        \   . ale#Escape(l:executable)
        \   . ' classpath'
        \   . ' -S'
        \   . ' -q'
    endif

    return ''
endfunction