Before: Save g:ale_thrift_thrift_executable Save g:ale_thrift_thrift_generators Save g:ale_thrift_thrift_includes Save g:ale_thrift_thrift_options unlet! b:ale_thrift_thrift_executable unlet! b:ale_thrift_thrift_generators unlet! b:ale_thrift_thrift_includes unlet! b:ale_thrift_thrift_options function! GetCommand(buffer) abort call ale#engine#InitBufferInfo(a:buffer) let l:command = ale_linters#thrift#thrift#GetCommand(a:buffer) call ale#engine#Cleanup(a:buffer) let l:split_command = split(l:command) let l:index = index(l:split_command, '-out') if l:index >= 0 let l:split_command[l:index + 1] = 'TEMP' endif return join(l:split_command) endfunction runtime ale_linters/thrift/thrift.vim After: Restore delfunction GetCommand unlet! b:ale_thrift_thrift_executable unlet! b:ale_thrift_thrift_generators unlet! b:ale_thrift_thrift_includes unlet! b:ale_thrift_thrift_options call ale#linter#Reset() Execute(The executable should be configurable): AssertEqual 'thrift', ale_linters#thrift#thrift#GetExecutable(bufnr('')) let b:ale_thrift_thrift_executable = 'foobar' AssertEqual 'foobar', ale_linters#thrift#thrift#GetExecutable(bufnr('')) Execute(The executable should be used in the command): AssertEqual \ ale#Escape('thrift') . ' --gen cpp -strict -out TEMP %t', \ GetCommand(bufnr('%')) let b:ale_thrift_thrift_executable = 'foobar' AssertEqual \ ale#Escape('foobar') . ' --gen cpp -strict -out TEMP %t', \ GetCommand(bufnr('%')) Execute(The list of generators should be configurable): let b:ale_thrift_thrift_generators = ['java', 'py:dynamic'] AssertEqual \ ale#Escape('thrift') . ' --gen java --gen py:dynamic -strict -out TEMP %t', \ GetCommand(bufnr('%')) let b:ale_thrift_thrift_generators = [] AssertEqual \ ale#Escape('thrift') . ' --gen cpp -strict -out TEMP %t', \ GetCommand(bufnr('%')) Execute(The list of include paths should be configurable): let b:ale_thrift_thrift_includes = ['included/path'] AssertEqual \ ale#Escape('thrift') \ . ' --gen cpp' \ . ' -I included/path' \ . ' -strict -out TEMP %t', \ GetCommand(bufnr('%')) Execute(The string of compiler options should be configurable): let b:ale_thrift_thrift_options = '-strict --allow-64bit-consts' AssertEqual \ ale#Escape('thrift') \ . ' --gen cpp -strict --allow-64bit-consts' \ . ' -out TEMP %t', \ GetCommand(bufnr('%'))