Add support for zeek (#3952)

ale_linters/zeek/zeek.vim

@@ -0,0 +1,22 @@
+" Author: Benjamin Bannier <bbannier@gmail.com>
+" Description: Support for checking Zeek files.
+"
+call ale#Set('zeek_zeek_executable', 'zeek')
+
+function! ale_linters#zeek#zeek#HandleErrors(buffer, lines) abort
+    let l:pattern = 'error in \v.*, line (\d+): (.*)$'
+
+    return map(ale#util#GetMatches(a:lines, l:pattern), "{
+    \   'lnum': str2nr(v:val[1]),
+    \   'text': v:val[2],
+    \}")
+endfunction
+
+call ale#linter#Define('zeek', {
+\   'name': 'zeek',
+\   'executable': {b -> ale#Var(b, 'zeek_zeek_executable')},
+\   'output_stream': 'stderr',
+\   'command': {-> '%e --parse-only %s'},
+\   'callback': 'ale_linters#zeek#zeek#HandleErrors',
+\   'lint_file': 1,
+\})

doc/ale-supported-languages-and-tools.txt

@@ -601,6 +601,8 @@ Notes:
   * `yamllint`
 * YANG
   * `yang-lsp`
+* Zeek
+  * `zeek`!!
 * Zig
   * `zls`
 

doc/ale-zeek.txt

@@ -0,0 +1,23 @@
+===============================================================================
+ALE Zeek Integration                                         *ale-zeek-options*
+                                                         *ale-integration-zeek*
+
+===============================================================================
+Integration Information
+
+  Currently, the only supported linter for Zeek is zeek.
+
+===============================================================================
+zeek                                                            *ale-zeek-zeek*
+
+g:ale_zeek_zeek_executable                         *g:ale_zeek_zeek_executable*
+                                                   *b:ale_zeek_zeek_executable*
+  Type: |String|
+  Default: `'zeek'`
+
+  This variable can be modified to change the executable path for `zeek`.
+
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:
+

doc/ale.txt

@@ -3114,6 +3114,8 @@ documented in additional help files.
     yamllint..............................|ale-yaml-yamllint|
   yang....................................|ale-yang-options|
     yang-lsp..............................|ale-yang-lsp|
+  zeek....................................|ale-zeek-options|
+    zeek..................................|ale-zeek-zeek|
   zig.....................................|ale-zig-options|
     zls...................................|ale-zig-zls|
 

supported-tools.md

@@ -610,5 +610,7 @@ formatting.
   * [yamllint](https://yamllint.readthedocs.io/)
 * YANG
   * [yang-lsp](https://github.com/theia-ide/yang-lsp)
+* Zeek
+  * [zeek](http://zeek.org) :floppy_disk:
 * Zig
   * [zls](https://github.com/zigtools/zls)

test/handler/test_zeek_handler.vader

@@ -0,0 +1,17 @@
+Before:
+  runtime ale_linters/zeek/zeek.vim
+
+After:
+  call ale#linter#Reset()
+
+Execute(The zeek handler should parse input correctly):
+  AssertEqual
+  \ [
+  \   {
+  \     'lnum': 2,
+  \     'text': 'unknown identifier bar, at or near "bar"'
+  \   },
+  \ ],
+  \ ale_linters#zeek#zeek#HandleErrors(bufnr(''), [
+  \ 'error in /tmp/foo.zeek, line 2: unknown identifier bar, at or near "bar"'
+  \ ])

test/linter/test_zeek.vader

@@ -0,0 +1,17 @@
+Before:
+  call ale#assert#SetUpLinterTest('zeek', 'zeek')
+
+  let b:command_tail = ' --parse-only %s'
+
+After:
+  call ale#assert#TearDownLinterTest()
+
+  unlet! b:command_tail
+
+Execute(The default command should be correct):
+  AssertLinter 'zeek', ale#Escape('zeek') . b:command_tail
+
+Execute(The zeek executable should be configurable, and escaped properly):
+  let g:ale_zeek_zeek_executable = 'executable with spaces'
+
+  AssertLinter 'executable with spaces', ale#Escape('executable with spaces') . b:command_tail