Add VHDL Support & Newer Verilog Linters (#2229)

* Added VHDL file support with ghdl compiler
* Update ghdl.vim
* Create vcom.vim
* Create xvhdl.vim
* Update xvlog.vim
* Added documentation for VHDL & Verilog linters
* Added tests to VHDL & Verilog linters

1 files changed, 38 insertions, 0 deletions

diff --git a/ale_linters/vhdl/vcom.vim b/ale_linters/vhdl/vcom.vim
new file mode 100644
index 00000000..3df5633e
--- /dev/null
+++ b/ale_linters/vhdl/vcom.vim
@@ -0,0 +1,38 @@
+" Author:      John Gentile <johncgentile17@gmail.com>
+" Description: Adds support for Mentor Graphics Questa/ModelSim `vcom` VHDL compiler/checker
+
+call ale#Set('vhdl_vcom_executable', 'vcom')
+" Use VHDL-2008. See `$ vcom -h` for more options
+call ale#Set('vhdl_vcom_options', '-2008 -quiet -lint')
+
+function! ale_linters#vhdl#vcom#GetCommand(buffer) abort
+    return '%e ' . ale#Pad(ale#Var(a:buffer, 'vhdl_vcom_options')) . ' %t'
+endfunction
+
+function! ale_linters#vhdl#vcom#Handle(buffer, lines) abort
+    "Matches patterns like the following:
+    "** Warning: ../path/to/file.vhd(218): (vcom-1236) Shared variables must be of a protected type.
+    "** Error: tb_file.vhd(73): (vcom-1136) Unknown identifier "aresetn".
+    "** Error: tb_file.vhd(73): Bad resolution function (STD_LOGIC) for type (error).
+    "** Error: tb_file.vhd(73): near ":": (vcom-1576) expecting ';' or ')'.
+    let l:pattern = '^**\s\(\w*\):[a-zA-Z0-9\-\.\_\/ ]\+(\(\d\+\)):\s\+\(.*\)'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+      call add(l:output, {
+      \   'lnum': l:match[2] + 0,
+      \   'type': l:match[1] is? 'Error' ? 'E' : 'W',
+      \   'text': l:match[3],
+      \})
+    endfor
+
+    return l:output
+endfunction
+
+call ale#linter#Define('vhdl', {
+\   'name': 'vcom',
+\   'output_stream': 'stdout',
+\   'executable_callback': ale#VarFunc('vhdl_vcom_executable'),
+\   'command_callback': 'ale_linters#vhdl#vcom#GetCommand',
+\   'callback': 'ale_linters#vhdl#vcom#Handle',
+\})