vimscript to search in elixir db

elixir.vim

function! s:PrepareEnv()
    let $LXR_DATA_DIR="~/git/linux.db"
    let $LXR_REPO_DIR="~/git/linux/"
                                                                                                                                                                                                                                              
    let s:git_dir = getcwd()
    let s:tag = system("git describe --tags --abbrev=0")
    if v:shell_error
        return v:shell_error
    endif
    let s:tag = split(s:tag, '\n')
    let s:tag =s:tag[0]
    return 0
endfunction

function! MakeLxrLocationList(id)
   if s:PrepareEnv()
        echoerr "Not in a git directory: ".getpwd()
   endif
   echo s:Redir(":pwd")
   let bufListTxt = s:Redir("!~/dev/elixir/query.py ident " . s:tag . " " .  a:id . " def_only" )
   let bufListLines = split(bufListTxt, "\r\n")
   let bufListLines = bufListLines[2:]
   let bufLocList = s:MakeBufLocList(bufListLines, "")
   call setloclist(0, bufLocList, ' ')
   lwindow
endfunction

" Buffer List
function! s:MakeBufLocList(bufListLines, pattern)
    let locList = []
    for lineTxt in a:bufListLines
        let elem = split(lineTxt)
        let locItem = {}
        let locItem["filename"] = substitute(elem[0], ":$", "","")
        let locItem["text"] = elem[2]
        for linenb in split(elem[1], ",")
            let locItem["lnum"] = str2nr(linenb)
            call add(locList, locItem)
        endfor
    endfor
    return locList
endfunction

"Capture long output of a comand into a variable.
function! s:Redir(cmd)
   let output = ""
   redir =>> output
   silent exe a:cmd
   redir END
   return output
endfunction

nmap <silent> <leader>lxr :call MakeLxrLocationList(expand("<cword>"))<CR>