Add support for `solc` Solidity compiler (#2648)

* Add support for `solc` Solidity compiler
* Set default value for `solidity_solc_options`
* Add test for solc handler

1 files changed, 35 insertions, 0 deletions

diff --git a/ale_linters/solidity/solc.vim b/ale_linters/solidity/solc.vim
new file mode 100644
index 00000000..e4f220ac
--- /dev/null
+++ b/ale_linters/solidity/solc.vim
@@ -0,0 +1,35 @@
+" Author: Karl Bartel <karl42@gmail.com> - http://karl.berlin/
+" Description: Report solc compiler errors in Solidity code
+
+call ale#Set('solidity_solc_options', '')
+
+function! ale_linters#solidity#solc#Handle(buffer, lines) abort
+    " Matches patterns like the following:
+    " /path/to/file/file.sol:1:10: Error: Identifier not found or not unique.
+    let l:pattern = '\v^[^:]+:(\d+):(\d+): (Error|Warning): (.*)$'
+    let l:output = []
+
+    for l:match in ale#util#GetMatches(a:lines, l:pattern)
+        let l:isError = l:match[3] is? 'error'
+        call add(l:output, {
+        \   'lnum': l:match[1] + 0,
+        \   'col': l:match[2] + 0,
+        \   'text': l:match[4],
+        \   'type': l:isError ? 'E' : 'W',
+        \})
+    endfor
+
+    return l:output
+endfunction
+
+function! ale_linters#solidity#solc#GetCommand(buffer) abort
+    return 'solc' . ale#Pad(ale#Var(a:buffer, 'solidity_solc_options')) . ' %s'
+endfunction
+
+call ale#linter#Define('solidity', {
+\   'name': 'solc',
+\   'executable': 'solc',
+\   'command': function('ale_linters#solidity#solc#GetCommand'),
+\   'callback': 'ale_linters#solidity#solc#Handle',
+\   'output_stream': 'stderr',
+\})