Fix #1061 - Handle the filenames returned by javac

ale_linters/java/javac.vim

@@ -49,7 +49,10 @@ function! ale_linters#java#javac#GetCommand(buffer, import_paths) abort
     " 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'
+    " Always run javac from the directory the file is in, so we can resolve
+    " relative paths correctly.
+    return ale#path#BufferCdString(a:buffer)
+    \ . 'javac -Xlint'
     \ . ' ' . l:cp_option
     \ . ' ' . l:sp_option
     \ . ' -d ' . ale#Escape(l:class_file_directory)
@@ -63,14 +66,15 @@ function! ale_linters#java#javac#Handle(buffer, lines) abort
     " Main.java:13: warning: [deprecation] donaught() in Testclass has been deprecated
     " Main.java:16: error: ';' expected
 
-    let l:pattern = '\v^.*:(\d+): (.+):(.+)$'
+    let l:directory = expand('#' . a:buffer . ':p:h')
+    let l:pattern = '\v^(.*):(\d+): (.+):(.+)$'
     let l:col_pattern = '\v^(\s*\^)$'
     let l:symbol_pattern = '\v^ +symbol: *(class|method) +([^ ]+)'
     let l:output = []
 
     for l:match in ale#util#GetMatches(a:lines, [l:pattern, l:col_pattern, l:symbol_pattern])
         if empty(l:match[2]) && empty(l:match[3])
-                let l:output[-1].col = len(l:match[1])
+            let l:output[-1].col = len(l:match[1])
         elseif empty(l:match[3])
             " Add symbols to 'cannot find symbol' errors.
             if l:output[-1].text is# 'error: cannot find symbol'
@@ -78,9 +82,10 @@ function! ale_linters#java#javac#Handle(buffer, lines) abort
             endif
         else
             call add(l:output, {
-            \   'lnum': l:match[1] + 0,
+            \   'filename': ale#path#GetAbsPath(l:directory, l:match[1]),
-            \   'text': l:match[2] . ':' . l:match[3],
+            \   'lnum': l:match[2] + 0,
-            \   'type': l:match[2] is# 'error' ? 'E' : 'W',
+            \   'text': l:match[3] . ':' . l:match[4],
+            \   'type': l:match[3] is# 'error' ? 'E' : 'W',
             \})
         endif
     endfor

test/command_callback/test_javac_command_callback.vader

@@ -28,12 +28,15 @@ Before:
 
   call ale#test#SetFilename('dummy.java')
 
+  let g:prefix = 'cd ' . ale#Escape(expand('%:p:h')) . ' && javac -Xlint'
+
 After:
   call ale#test#RestoreDirectory()
 
   Restore
 
   unlet! g:cp_sep
+  unlet! g:prefix
 
   delfunction GetCommand
 
@@ -43,20 +46,21 @@ After:
   call ale#engine#Cleanup(bufnr(''))
 
 Execute(The javac callback should return the correct default value):
-  AssertEqual 'javac -Xlint -d TEMP %t', GetCommand([])
+  AssertEqual g:prefix . ' -d TEMP %t', GetCommand([])
 
 Execute(The javac callback should use g:ale_java_javac_classpath correctly):
   let g:ale_java_javac_classpath = 'foo.jar'
 
   AssertEqual
-  \ 'javac -Xlint'
+  \ g:prefix
   \   . ' -cp ' . ale#Escape('foo.jar')
   \   . ' -d TEMP %t',
   \ GetCommand([])
 
 Execute(The javac callback should include discovered classpaths):
   AssertEqual
-  \ 'javac -Xlint -cp '
+  \ g:prefix
+  \   . ' -cp '
   \   . ale#Escape(join(['/foo/bar.jar', '/xyz/abc.jar'], g:cp_sep))
   \   . ' -d TEMP %t',
   \ GetCommand([
@@ -70,7 +74,8 @@ Execute(The javac callback should combine discovered classpaths and manual ones)
   let g:ale_java_javac_classpath = 'configured.jar'
 
   AssertEqual
-  \ 'javac -Xlint -cp '
+  \ g:prefix
+  \   . ' -cp '
   \   . ale#Escape(join(
   \     [
   \       '/foo/bar.jar',
@@ -90,7 +95,8 @@ Execute(The javac callback should combine discovered classpaths and manual ones)
   let g:ale_java_javac_classpath = 'configured.jar' . g:cp_sep . 'configured2.jar'
 
   AssertEqual
-  \ 'javac -Xlint -cp '
+  \ g:prefix
+  \   . ' -cp '
   \   . ale#Escape(join(
   \     [
   \       '/foo/bar.jar',
@@ -114,7 +120,7 @@ Execute(The javac callback should detect source directories):
   call ale#engine#InitBufferInfo(bufnr(''))
 
   AssertEqual
-  \ 'javac -Xlint'
+  \ 'cd ' . ale#Escape(expand('%:p:h')) . ' && javac -Xlint'
   \   . ' -sourcepath ' . ale#Escape(
   \     ale#path#Winify(g:dir . '/java_paths/src/main/java/')
   \   )
@@ -127,7 +133,7 @@ Execute(The javac callback should combine detected source directories and classp
   call ale#engine#InitBufferInfo(bufnr(''))
 
   AssertEqual
-  \ 'javac -Xlint'
+  \ 'cd ' . ale#Escape(expand('%:p:h')) . ' && javac -Xlint'
   \   . ' -cp ' . ale#Escape(join(['/foo/bar.jar', '/xyz/abc.jar'], g:cp_sep))
   \   . ' -sourcepath ' . ale#Escape(
   \     ale#path#Winify(g:dir . '/java_paths/src/main/java/')
@@ -146,6 +152,6 @@ Execute(The javac callback should use g:ale_java_javac_options correctly):
   let b:command = ale_linters#java#javac#GetCommand(bufnr(''), [])
 
   AssertEqual
-  \ 'javac -Xlint'
+  \ g:prefix
   \   . ' -d TEMP --anything --else %t',
   \ GetCommand([])

test/handler/test_javac_handler.vader

@@ -1,42 +1,51 @@
 Before:
   runtime ale_linters/java/javac.vim
 
+  call ale#test#SetDirectory('/testplugin/test')
+  call ale#test#SetFilename('dummy.java')
+
 After:
+  call ale#test#RestoreDirectory()
   call ale#linter#Reset()
 
 Execute(The javac handler should handle cannot find symbol errors):
   AssertEqual
   \ [
   \   {
+  \     'filename': '/tmp/vLPr4Q5/33/foo.java',
   \     'lnum': 1,
   \     'text': 'error: some error',
   \     'type': 'E',
   \   },
   \   {
+  \     'filename': '/tmp/vLPr4Q5/33/foo.java',
   \     'lnum': 2,
   \     'col': 5,
   \     'text': 'error: cannot find symbol: BadName',
   \     'type': 'E',
   \   },
   \   {
+  \     'filename': '/tmp/vLPr4Q5/33/foo.java',
   \     'lnum': 34,
   \     'col': 5,
   \     'text': 'error: cannot find symbol: BadName2',
   \     'type': 'E',
   \   },
   \   {
+  \     'filename': '/tmp/vLPr4Q5/33/foo.java',
   \     'lnum': 37,
   \     'text': 'warning: some warning',
   \     'type': 'W',
   \   },
   \   {
+  \     'filename': '/tmp/vLPr4Q5/33/foo.java',
   \     'lnum': 42,
   \     'col': 11,
   \     'text': 'error: cannot find symbol: bar()',
   \     'type': 'E',
   \   },
   \ ],
-  \ ale_linters#java#javac#Handle(347, [
+  \ ale_linters#java#javac#Handle(bufnr(''), [
   \   '/tmp/vLPr4Q5/33/foo.java:1: error: some error',
   \   '/tmp/vLPr4Q5/33/foo.java:2: error: cannot find symbol',
   \   '    BadName foo() {',
@@ -49,9 +58,30 @@ Execute(The javac handler should handle cannot find symbol errors):
   \   '  symbol:   class BadName2',
   \   '  location: class Bar',
   \   '/tmp/vLPr4Q5/33/foo.java:37: warning: some warning',
-  \   '/tmp/vLPr4Q5/264/foo.java:42: error: cannot find symbol',
+  \   '/tmp/vLPr4Q5/33/foo.java:42: error: cannot find symbol',
   \   '      this.bar();',
   \   '          ^',
   \   '  symbol: method bar()',
   \   '5 errors',
   \ ])
+
+Execute(The javac handler should resolve files from different directories):
+  AssertEqual
+  \ [
+  \   {
+  \     'filename': ale#path#Winify(g:dir . '/Foo.java'),
+  \     'lnum': 1,
+  \     'text': 'error: some error',
+  \     'type': 'E',
+  \   },
+  \   {
+  \     'filename': ale#path#Winify(g:dir . '/Bar.java'),
+  \     'lnum': 1,
+  \     'text': 'error: some error',
+  \     'type': 'E',
+  \   },
+  \ ],
+  \ ale_linters#java#javac#Handle(bufnr(''), [
+  \   './Foo.java:1: error: some error',
+  \   './Bar.java:1: error: some error',
+  \ ])