1 files changed, 111 insertions, 0 deletions
diff --git a/src/debputy/lsp/lsp_debian_debputy_manifest.py b/src/debputy/lsp/lsp_debian_debputy_manifest.py
new file mode 100644
index 0000000..2f9920e
--- /dev/null
+++ b/src/debputy/lsp/lsp_debian_debputy_manifest.py
@@ -0,0 +1,111 @@
+import re
+from typing import (
+    Optional,
+    List,
+)
+
+from lsprotocol.types import (
+    Diagnostic,
+    TEXT_DOCUMENT_WILL_SAVE_WAIT_UNTIL,
+    Position,
+    Range,
+    DiagnosticSeverity,
+)
+from ruamel.yaml.error import MarkedYAMLError, YAMLError
+
+from debputy.highlevel_manifest import MANIFEST_YAML
+from debputy.lsp.lsp_features import (
+    lint_diagnostics,
+    lsp_standard_handler,
+)
+from debputy.lsp.text_util import (
+    LintCapablePositionCodec,
+)
+
+try:
+    from pygls.server import LanguageServer
+except ImportError:
+    pass
+
+
+_CONTAINS_TAB_OR_COLON = re.compile(r"[\t:]")
+_WORDS_RE = re.compile("([a-zA-Z0-9_-]+)")
+_MAKE_ERROR_RE = re.compile(r"^[^:]+:(\d+):\s*(\S.+)")
+
+
+_LANGUAGE_IDS = [
+    "debian/debputy.manifest",
+    "debputy.manifest",
+    # LSP's official language ID for YAML files
+    "yaml",
+]
+
+
+# lsp_standard_handler(_LANGUAGE_IDS, TEXT_DOCUMENT_CODE_ACTION)
+lsp_standard_handler(_LANGUAGE_IDS, TEXT_DOCUMENT_WILL_SAVE_WAIT_UNTIL)
+
+
+def _word_range_at_position(
+    lines: List[str],
+    line_no: int,
+    char_offset: int,
+) -> Range:
+    line = lines[line_no]
+    line_len = len(line)
+    start_idx = char_offset
+    end_idx = char_offset
+    while end_idx + 1 < line_len and not line[end_idx + 1].isspace():
+        end_idx += 1
+
+    while start_idx - 1 >= 0 and not line[start_idx - 1].isspace():
+        start_idx -= 1
+
+    return Range(
+        Position(line_no, start_idx),
+        Position(line_no, end_idx),
+    )
+
+
+@lint_diagnostics(_LANGUAGE_IDS)
+def _lint_debian_debputy_manifest(
+    _doc_reference: str,
+    _path: str,
+    lines: List[str],
+    position_codec: LintCapablePositionCodec,
+) -> Optional[List[Diagnostic]]:
+    diagnostics = []
+    try:
+        MANIFEST_YAML.load("".join(lines))
+    except MarkedYAMLError as e:
+        error_range = position_codec.range_to_client_units(
+            lines,
+            _word_range_at_position(
+                lines,
+                e.problem_mark.line,
+                e.problem_mark.column,
+            ),
+        )
+        diagnostics.append(
+            Diagnostic(
+                error_range,
+                f"YAML parse error: {e}",
+                DiagnosticSeverity.Error,
+            ),
+        )
+    except YAMLError as e:
+        error_range = position_codec.range_to_client_units(
+            lines,
+            Range(
+                Position(0, 0),
+                Position(0, len(lines[0])),
+            ),
+        )
+        diagnostics.append(
+            Diagnostic(
+                error_range,
+                f"Unknown YAML parse error: {e} [{e!r}]",
+                DiagnosticSeverity.Error,
+            ),
+        )
+
+    return diagnostics