2018-04-09 15:45:08 +00:00
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" Author: Johannes Wienke <languitar@semipol.de>
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" Description: PMD for Java files
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function! ale_linters#java#pmd#Handle(buffer, lines) abort
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Fix PMD not working with classes without package
PMD is currently not working properly for Java classes that use [unnamed
packages](https://docs.oracle.com/javase/specs/jls/se11/html/jls-7.html#jls-7.4.2).
Consider the following Java class that does not contain a `package`
declaration:
```java
public class App {
String getGreeting() {
return "Hello world.";
}
static void main(String... args) {
System.out.println(new App().getGreeting());
}
}
```
Running PMD in the command line agaist the Java class above produces an
output with empty string `""` in the `"Package"` column:
```sh
$ pmd -R category/java/bestpractices.xml -f csv -d './src/main/java/App.java'
Oct 02, 2018 9:10:39 PM net.sourceforge.pmd.PMD processFiles
WARNING: This analysis could be faster, please consider using Incremental Analysis: https://pmd.github.io/pmd-6.7.0/pmd_userdocs_incremental_analysis.html
"Problem","Package","File","Priority","Line","Description","Rule set","Rule"
"1","","/Users/diego/Projects/github.com/dlresende/kata-fizz-buzz/src/main/java/App.java","2","7","System.out.println is used","Best Practices","SystemPrintln"
```
But the pmd.vim handler's current pattern refuses everything coming
from a Java class that does not have a package name (2nd column):
```vim
let l:pattern = '"\(\d\+\)",".\+","\(.\+\)","\(\d\+\)","\(\d\+\)","\(.\+\)","\(.\+\)","\(.\+\)"$'
```
The solution I am proposing is to also accept empty strings as package names.
2018-10-02 20:05:14 +00:00
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let l:pattern = '"\(\d\+\)",".*","\(.\+\)","\(\d\+\)","\(\d\+\)","\(.\+\)","\(.\+\)","\(.\+\)"$'
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2018-04-09 15:45:08 +00:00
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let l:output = []
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for l:match in ale#util#GetMatches(a:lines, l:pattern)
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call add(l:output, {
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\ 'type': 'W',
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\ 'lnum': l:match[4] + 0,
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\ 'text': l:match[5],
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\ 'code': l:match[6] . ' - ' . l:match[7],
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\})
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endfor
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return l:output
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endfunction
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function! ale_linters#java#pmd#GetCommand(buffer) abort
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return 'pmd '
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\ . ale#Var(a:buffer, 'java_pmd_options')
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\ . ' -f csv'
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\ . ' -d %t'
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endfunction
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if !exists('g:ale_java_pmd_options')
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let g:ale_java_pmd_options = '-R category/java/bestpractices.xml'
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endif
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call ale#linter#Define('java', {
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\ 'name': 'pmd',
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\ 'executable': 'pmd',
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\ 'command_callback': 'ale_linters#java#pmd#GetCommand',
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\ 'callback': 'ale_linters#java#pmd#Handle',
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\})
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