Add support for Microsoft's DSL Bicep (#4310)

* Add support for Microsoft's DSL Bicep

The compilation command 'bicep build' catches compilation errors as well
as providing some lint warnings.

Repository for Bicep: https://github.com/Azure/bicep

* Different null file on Windows & hardcode commands

7 files changed, 144 insertions, 0 deletions

diff --git a/ale_linters/bicep/bicep.vim b/ale_linters/bicep/bicep.vim
new file mode 100644
index 00000000..5796f83e
--- /dev/null
+++ b/ale_linters/bicep/bicep.vim
@@ -0,0 +1,63 @@
+" Author: Carl Smedstad <carl.smedstad at protonmail dot com>
+" Description: bicep for bicep files
+
+let g:ale_bicep_bicep_executable =
+\   get(g:, 'ale_bicep_bicep_executable', 'bicep')
+
+let g:ale_bicep_bicep_options =
+\   get(g:, 'ale_bicep_bicep_options', '')
+
+function! ale_linters#bicep#bicep#Executable(buffer) abort
+    return ale#Var(a:buffer, 'bicep_bicep_executable')
+endfunction
+
+function! ale_linters#bicep#bicep#Command(buffer) abort
+    let l:executable = ale_linters#bicep#bicep#Executable(a:buffer)
+    let l:options = ale#Var(a:buffer, 'bicep_bicep_options')
+
+    if has('win32')
+        let l:nullfile = 'NUL'
+    else
+        let l:nullfile = '/dev/null'
+    endif
+
+    return ale#Escape(l:executable)
+    \   . ' build --outfile '
+    \   . l:nullfile
+    \   . ' '
+    \   . l:options
+    \   . ' %t'
+endfunction
+
+function! ale_linters#bicep#bicep#Handle(buffer, lines) abort
+    let l:pattern = '\v^.*\((\d+),(\d+)\)\s:\s([a-zA-Z]*)\s([-a-zA-Z0-9]*):\s(.*)'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        if l:match[3] is# 'Error'
+            let l:type = 'E'
+        elseif l:match[3] is# 'Warning'
+            let l:type = 'W'
+        else
+            let l:type = 'I'
+        endif
+
+        call add(l:output, {
+        \   'lnum': l:match[1] + 0,
+        \   'col': l:match[2] + 0,
+        \   'type': l:type,
+        \   'code': l:match[4],
+        \   'text': l:match[5],
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('bicep', {
+\   'name': 'bicep',
+\   'executable': function('ale_linters#bicep#bicep#Executable'),
+\   'command': function('ale_linters#bicep#bicep#Command'),
+\   'callback': 'ale_linters#bicep#bicep#Handle',
+\   'output_stream': 'both',
+\})
diff --git a/doc/ale-bicep.txt b/doc/ale-bicep.txt
new file mode 100644
index 00000000..d26d67bc
--- /dev/null
+++ b/doc/ale-bicep.txt
@@ -0,0 +1,24 @@
+===============================================================================
+ALE Bicep Integration                                        *ale-bicep-options*
+
+
+===============================================================================
+bicep                                                          *ale-bicep-bicep*
+
+g:ale_bicep_bicep_executable                      *g:ale_bicep_bicep_executable*
+                                                  *b:ale_bicep_bicep_executable*
+  Type: |String|
+  Default: `'bicep'`
+
+  This variable can be set to change the path to bicep.
+
+
+g:ale_bicep_bicep_options                            *g:ale_bicep_bicep_options*
+                                                     *b:ale_bicep_bicep_options*
+  Type: |String|
+  Default: `'build --outfile /dev/null'`
+
+  This variable can be set to pass additional options to bicep.
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:
diff --git a/doc/ale-supported-languages-and-tools.txt b/doc/ale-supported-languages-and-tools.txt
index c7548f9f..080b7ec0 100644
--- a/doc/ale-supported-languages-and-tools.txt
+++ b/doc/ale-supported-languages-and-tools.txt
@@ -52,6 +52,8 @@ Notes:
   * `buildifier`
 * BibTeX
   * `bibclean`
+* Bicep
+  * `bicep`
 * BitBake
   * `oelint-adv`
 * Bourne Shell
diff --git a/doc/ale.txt b/doc/ale.txt
index ed3696d4..c20924be 100644
--- a/doc/ale.txt
+++ b/doc/ale.txt
@@ -2787,6 +2787,8 @@ documented in additional help files.
     buildifier............................|ale-bazel-buildifier|
   bib.....................................|ale-bib-options|
     bibclean..............................|ale-bib-bibclean|
+  bicep...................................|ale-bicep-options|
+    bicep.................................|ale-bicep-bicep|
   bitbake.................................|ale-bitbake-options|
     oelint-adv............................|ale-bitbake-oelint_adv|
   c.......................................|ale-c-options|
diff --git a/supported-tools.md b/supported-tools.md
index 70896ca9..ed4458f1 100644
--- a/supported-tools.md
+++ b/supported-tools.md
@@ -61,6 +61,8 @@ formatting.
   * [buildifier](https://github.com/bazelbuild/buildtools)
 * BibTeX
   * [bibclean](http://ftp.math.utah.edu/pub/bibclean/)
+* Bicep
+  * [bicep](https://github.com/Azure/bicep)
 * BitBake
   * [oelint-adv](https://github.com/priv-kweihmann/oelint-adv)
 * Bourne Shell
diff --git a/test/handler/test_bicep_bicep_handler.vader b/test/handler/test_bicep_bicep_handler.vader
new file mode 100644
index 00000000..d105cae5
--- /dev/null
+++ b/test/handler/test_bicep_bicep_handler.vader
@@ -0,0 +1,30 @@
+Before:
+  runtime ale_linters/bicep/bicep.vim
+
+After:
+  Restore
+
+  call ale#linter#Reset()
+
+Execute(The cmake_lint handler should handle basic warnings):
+  AssertEqual
+  \ [
+  \   {
+  \     'lnum': 7,
+  \     'col': 10,
+  \     'type': 'W',
+  \     'code': 'no-unused-existing-resources',
+  \     'text': 'Existing resource "asdasd" is declared but never used. [https://aka.ms/bicep/linter/no-unused-existing-resources]',
+  \   },
+  \   {
+  \     'lnum': 106,
+  \     'col': 6,
+  \     'type': 'E',
+  \     'code': 'BCP019',
+  \     'text': 'Expected a new line character at this location.',
+  \   },
+  \ ],
+  \ ale_linters#bicep#bicep#Handle(1, [
+  \   '/tmp/nvimhxqs5D/1/dns.bicep(7,10) : Warning no-unused-existing-resources: Existing resource "asdasd" is declared but never used. [https://aka.ms/bicep/linter/no-unused-existing-resources]',
+  \   '/tmp/nvimhxqs5D/1/dns.bicep(106,6) : Error BCP019: Expected a new line character at this location.',
+  \ ])
diff --git a/test/linter/test_bicep_bicep.vader b/test/linter/test_bicep_bicep.vader
new file mode 100644
index 00000000..2beb2f22
--- /dev/null
+++ b/test/linter/test_bicep_bicep.vader
@@ -0,0 +1,21 @@
+Before:
+  call ale#assert#SetUpLinterTest('bicep', 'bicep')
+
+After:
+  call ale#assert#TearDownLinterTest()
+
+Execute(The default command should be correct):
+  if has('win32')
+      AssertLinter 'bicep', ale#Escape('bicep') . ' build --outfile NUL  %t'
+  else
+      AssertLinter 'bicep', ale#Escape('bicep') . ' build --outfile /dev/null  %t'
+  endif
+
+Execute(The executable should be configurable):
+  let g:ale_bicep_bicep_executable = 'foobar'
+
+  if has('win32')
+      AssertLinter 'foobar', ale#Escape('foobar') . ' build --outfile NUL  %t'
+  else
+      AssertLinter 'foobar', ale#Escape('foobar') . ' build --outfile /dev/null  %t'
+  endif