Solidity solc linter compatible with 0.6/0.7/0.8 (#3763)

ale_linters/solidity/solc.vim

@@ -1,34 +1,52 @@
 " Author: Karl Bartel <karl42@gmail.com> - http://karl.berlin/
 " Description: Report solc compiler errors in Solidity code
 
+call ale#Set('solidity_solc_executable', 'solc')
 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): (.*)$'
+    " Error: Expected ';' but got '('
+    "    --> /path/to/file/file.sol:1:10:)
+    let l:pattern = '\v(Error|Warning): (.*)$'
+    let l:line_and_column_pattern = '\v\.sol:(\d+):(\d+):'
     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',
-        \})
+    for l:line in a:lines
+        let l:match = matchlist(l:line, l:pattern)
+
+        if len(l:match) == 0
+            let l:match = matchlist(l:line, l:line_and_column_pattern)
+
+            if len(l:match) > 0
+                let l:index = len(l:output) - 1
+                let l:output[l:index]['lnum'] = l:match[1] + 0
+                let l:output[l:index]['col'] = l:match[2] + 0
+            endif
+        else
+            let l:isError = l:match[1] is? 'Error'
+
+            call add(l:output, {
+            \   'lnum': 0,
+            \   'col': 0,
+            \   'text': l:match[2],
+            \   'type': l:isError ? 'E' : 'W',
+            \})
+        endif
     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'
+    let l:executable = ale#Var(a:buffer, 'solidity_solc_executable')
+
+    return l:executable . ale#Pad(ale#Var(a:buffer, 'solidity_solc_options')) . ' %s'
 endfunction
 
 call ale#linter#Define('solidity', {
 \   'name': 'solc',
-\   'executable': 'solc',
+\   'executable': {b -> ale#Var(b, 'solidity_solc_executable')},
 \   'command': function('ale_linters#solidity#solc#GetCommand'),
 \   'callback': 'ale_linters#solidity#solc#Handle',
 \   'output_stream': 'stderr',

doc/ale-solidity.txt

@@ -5,6 +5,12 @@ ALE Solidity Integration                                 *ale-solidity-options*
 ===============================================================================
 solc                                                        *ale-solidity-solc*
 
+g:ale_solidity_solc_executable                  *g:ale_solidity_solc_executable*
+                                                *b:ale_solidity_solc_executable*
+  Type: |String|
+  Default: `'solc'`
+
+  Override the invoked solc binary. For truffle/hardhat binaries.
 
 g:ale_solidity_solc_options                       *g:ale_solidity_solc_options*
                                                   *b:ale_solidity_solc_options*
@@ -33,4 +39,3 @@ solium                                                    *ale-solidity-solium*
 
 ===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:
-

test/handler/test_solc_handler.vader

@@ -21,10 +21,14 @@ Execute(Check solc output parsing):
   \   },
   \ ],
   \ ale_linters#solidity#solc#Handle(bufnr(''), [
-  \   'raiden_contracts/data/source/raiden/Token.sol:40:48: Warning: This declaration shadows an existing declaration.',
-  \   '   function decimals() external view returns (uint8 decimals);',
-  \   '                                              ^------------^',
-  \   '/home/karl/raiden-contracts/raiden_contracts/data/source/test/OneToNInternalsTest.sol:23:16: Error: Member "getSinleSignature" not found or not visible after argument-dependent lookup in type(contract OneToN).',
-  \   '       return OneToN.getSinleSignature(signatures, i);',
-  \   '              ^----------------------^',
+  \   'Warning: This declaration shadows an existing declaration.',
+  \   '  --> /path/to/file.sol:40:48:',
+  \   '   |',
+  \   '40 |   function decimals() external view returns (uint8 decimals);',
+  \   '   |                                              ^------------^',
+  \   'Error: Member "getSinleSignature" not found or not visible after argument-dependent lookup in type(contract OneToN).',
+  \   '  --> /path/to/file.sol:23:16: ',
+  \   '   | ',
+  \   '23 |    return OneToN.getSinleSignature(signatures, i);',
+  \   '   |           ^----------------------^',
   \ ])

test/linter/test_solc_commit.vader

@@ -0,0 +1,14 @@
+Before:
+  call ale#assert#SetUpLinterTest('solidity', 'solc')
+  let g:ale_solidity_solc_executable = 'solc-v0.8.4+commit.c7e474f2'
+
+After:
+  call ale#assert#TearDownLinterTest()
+
+Execute(The executable command should be configurable):
+  AssertLinter 'solc-v0.8.4+commit.c7e474f2', 'solc-v0.8.4+commit.c7e474f2 %s'
+
+Execute(The options should be configurable):
+  let g:ale_solidity_solc_options = '--foobar'
+
+  AssertLinter 'solc-v0.8.4+commit.c7e474f2', 'solc-v0.8.4+commit.c7e474f2 --foobar %s'