Add syntax check support

pyls/plugins/jedi_lint.py

@@ -0,0 +1,26 @@
+from pyls import hookimpl, lsp
+
+
+@hookimpl
+def pyls_lint(document):
+    errors = document.jedi_script().get_syntax_errors()
+    diagnostics = []
+
+    for error in errors:
+        err_range = {
+            'start': {
+                'line': error.line - 1,
+                'character': error.column,
+            },
+            'end': {
+                'line': error.until_line - 1,
+                'character': error.until_column,
+            },
+        }
+        diagnostics.append({
+            'source': 'jedi',
+            'range': err_range,
+            'message': error.get_message(),
+            'severity': lsp.DiagnosticSeverity.Error,
+        })
+    return diagnostics

setup.py

@@ -97,6 +97,7 @@
             'jedi_rename = pyls.plugins.jedi_rename',
             'jedi_signature_help = pyls.plugins.signature',
             'jedi_symbols = pyls.plugins.symbols',
+            'jedi_lint = pyls.plugins.jedi_lint',
             'mccabe = pyls.plugins.mccabe_lint',
             'preload = pyls.plugins.preload_imports',
             'pycodestyle = pyls.plugins.pycodestyle_lint',

test/plugins/test_jedi_lint.py

@@ -0,0 +1,60 @@
+from pyls import lsp, uris
+from pyls.workspace import Document
+from pyls.plugins import jedi_lint
+
+DOC_URI = uris.from_fs_path(__file__)
+DOC = """import sys
+
+def hello():
+\tpass
+
+import json
+"""
+
+DOC_SYNTAX_ERR = """def hello()
+    pass
+"""
+
+DOC_INDENT_ERR = """def hello():
+    x = 1
+  pass
+"""
+
+DOC_ENCODING = u"""# encoding=utf-8
+import sys
+"""
+
+
+def test_jedi_lint(workspace):
+    doc = Document(DOC_URI, workspace, DOC)
+    diags = jedi_lint.pyls_lint(doc)
+
+    assert not diags
+
+
+def test_syntax_error_jedi(workspace):
+    doc = Document(DOC_URI, workspace, DOC_SYNTAX_ERR)
+    diag = jedi_lint.pyls_lint(doc)[0]
+
+    assert diag['message'] == 'SyntaxError: invalid syntax'
+    assert diag['range']['start'] == {'line': 0, 'character': 11}
+    assert diag['range']['end'] == {'line': 1, 'character': 0}
+    assert diag['severity'] == lsp.DiagnosticSeverity.Error
+
+
+def test_indent_error_jedi(workspace):
+    doc = Document(DOC_URI, workspace, DOC_INDENT_ERR)
+    diag = jedi_lint.pyls_lint(doc)[0]
+
+    assert diag['message'] == "IndentationError: unindent does not match \
+any outer indentation level"
+    assert diag['range']['start'] == {'line': 2, 'character': 0}
+    assert diag['range']['end'] == {'line': 2, 'character': 2}
+    assert diag['severity'] == lsp.DiagnosticSeverity.Error
+
+
+def test_encoding_jedi(workspace):
+    doc = Document(DOC_URI, workspace, DOC_ENCODING)
+    diags = jedi_lint.pyls_lint(doc)
+
+    assert not diags