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" Author: farenjihn <farenjihn@gmail.com>, w0rp <devw0rp@gmail.com>
" Description: Lints java files using javac
let s:classpath_sep = has('unix') ? ':' : ';'
let g:ale_java_javac_options = get(g:, 'ale_java_javac_options', '')
let g:ale_java_javac_classpath = get(g:, 'ale_java_javac_classpath', '')
" Detect if the javac command just shows an annoying popup for Mac OSX.
if has('macunix')
function s:GetIsJavacAnAppStoreStub() abort
let l:path = resolve(systemlist('which javac')[0])
for l:line in readfile(l:path)
" This string is present inside the executable for the popup.
if l:line =~? 'No Java runtime present'
return 1
endif
endfor
return 0
endfunction
let s:is_javac_an_app_store_stub = s:GetIsJavacAnAppStoreStub()
delfunction s:GetIsJavacAnAppStoreStub
else
let s:is_javac_an_app_store_stub = 0
endif
function! ale_linters#java#javac#GetImportPaths(buffer) abort
let l:pom_path = ale#path#FindNearestFile(a:buffer, 'pom.xml')
if !empty(l:pom_path) && executable('mvn')
return ale#path#CdString(fnamemodify(l:pom_path, ':h'))
\ . 'mvn dependency:build-classpath'
endif
return ''
endfunction
function! s:BuildClassPathOption(buffer, import_paths) abort
" Filter out lines like [INFO], etc.
let l:class_paths = filter(a:import_paths[:], 'v:val !~# ''[''')
call extend(
\ l:class_paths,
\ split(ale#Var(a:buffer, 'java_javac_classpath'), s:classpath_sep),
\)
return !empty(l:class_paths)
\ ? '-cp ' . shellescape(join(l:class_paths, s:classpath_sep))
\ : ''
endfunction
function! ale_linters#java#javac#GetCommand(buffer, import_paths) abort
" If running the command will just show a popup, then don't run it.
if s:is_javac_an_app_store_stub
return ''
endif
let l:cp_option = s:BuildClassPathOption(a:buffer, a:import_paths)
let l:sp_option = ''
" Find the src directory, for files in this project.
let l:src_dir = ale#path#FindNearestDirectory(a:buffer, 'src/main/java')
if !empty(l:src_dir)
let l:sp_option = '-sourcepath ' . shellescape(l:src_dir)
endif
" Create .class files in a temporary directory, which we will delete later.
let l:class_file_directory = ale#engine#CreateDirectory(a:buffer)
return 'javac -Xlint'
\ . ' ' . l:cp_option
\ . ' ' . l:sp_option
\ . ' -d ' . shellescape(l:class_file_directory)
\ . ' ' . ale#Var(a:buffer, 'java_javac_options')
\ . ' %t'
endfunction
function! ale_linters#java#javac#Handle(buffer, lines) abort
" Look for lines like the following.
"
" Main.java:13: warning: [deprecation] donaught() in Testclass has been deprecated
" Main.java:16: error: ';' expected
let l:pattern = '\v^.*:(\d+): (.+):(.+)$'
let l:symbol_pattern = '\v^ +symbol: *(class|method) +([^ ]+)'
let l:output = []
for l:match in ale#util#GetMatches(a:lines, [l:pattern, l:symbol_pattern])
if empty(l:match[3])
" Add symbols to 'cannot find symbol' errors.
if l:output[-1].text ==# 'error: cannot find symbol'
let l:output[-1].text .= ': ' . l:match[2]
endif
else
call add(l:output, {
\ 'lnum': l:match[1] + 0,
\ 'text': l:match[2] . ':' . l:match[3],
\ 'type': l:match[2] ==# 'error' ? 'E' : 'W',
\})
endif
endfor
return l:output
endfunction
call ale#linter#Define('java', {
\ 'name': 'javac',
\ 'executable': 'javac',
\ 'command_chain': [
\ {'callback': 'ale_linters#java#javac#GetImportPaths', 'output_stream': 'stdout'},
\ {'callback': 'ale_linters#java#javac#GetCommand', 'output_stream': 'stderr'},
\ ],
\ 'callback': 'ale_linters#java#javac#Handle',
\})
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