some progress but eh

did this do something? idk

ctags-ls/.gitignore

@@ -0,0 +1 @@
+__pycache__

ctags-ls/README.md

@@ -0,0 +1,16 @@
+# language server for ctags
+
+Initial version is written in python.
+
+The goal of this is for the language server to detect changes in a ctags file
+in the pwd, and update the internal representation of the code based on that.
+
+No automatic calling of ctags, the user is responsible for keeping it updated
+as and when they like.
+
+Hope to sort all possible go to definitions somewhat intelligently based on the
+current path of the file.
+
+Fuzzy completions?
+
+Built with [pygls](https://github.com/openlawlibrary/pygls).

ctags-ls/justfile

@@ -0,0 +1,4 @@
+test:
+    uv run pytest
+tag:
+    ctags -R ~/cig/ .

ctags-ls/pyproject.toml

@@ -0,0 +1,17 @@
+[project]
+name = "ctags-ls"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.14"
+dependencies = [
+    "pygls>=2.1.1",
+    "pytest>=9.0.3",
+]
+
+[project.scripts]
+ctags-ls = "ctags_ls:main"
+
+[build-system]
+requires = ["uv_build>=0.11.8,<0.12.0"]
+build-backend = "uv_build"

ctags-ls/src/ctags_ls/__init__.py

@@ -0,0 +1,29 @@
+from pygls.lsp.server import LanguageServer
+from lsprotocol import types
+
+from ctags_ls.tags import Tags
+
+ls = LanguageServer("ctags-ls", "v0.1")
+tags = Tags(ls)
+
+@ls.feature(
+    types.TEXT_DOCUMENT_COMPLETION,
+    types.CompletionOptions(trigger_characters=["."])
+)
+def completions(params: types.CompletionParams):
+    items = [
+        types.CompletionItem(label=symbol, documentation=f'***{tag.type}*** **{tag.location}** {tag.file}')
+        for symbol, tags in tags.symbols.items()
+        for tag in tags
+    ]
+    document = ls.workspace.get_text_document(params.text_document.uri)
+    current_line = document.lines[params.position.line][:params.position.character]
+    if current_line.endswith("hello."):
+        items = [
+            types.CompletionItem(label="world"),
+            types.CompletionItem(label="friend"),
+        ]
+    return types.CompletionList(is_incomplete=False, items=items)
+
+def main():
+    ls.start_io()

ctags-ls/src/ctags_ls/tags.py

@@ -0,0 +1,69 @@
+from collections.abc import Mapping, Sequence
+from dataclasses import dataclass
+import os
+from pathlib import Path
+import re
+from typing import final
+
+TAGS_PATH = Path('tags')
+
+@final
+class Tags:
+    def __init__(self, tags_path: Path = TAGS_PATH) -> None:
+        self._last_mtime: float = 0.0
+        self._cache: dict[str, list[Tag]] = {}
+        self.TAGS_PATH = tags_path
+
+    @property
+    def symbols(self) -> Mapping[str, Sequence[Tag]]:
+        self._assure_valid_cache()
+        return self._cache
+
+    def _assure_valid_cache(self) -> None:
+        curr_mtime = os.path.getmtime(self.TAGS_PATH)
+        if curr_mtime > self._last_mtime:
+            self._update_cache()
+            self._last_mtime = curr_mtime
+
+    def _update_cache(self):
+        self._cache = {}
+        with self.TAGS_PATH.open('r') as f:
+            lines = (l for l in f.readlines() if not l.startswith('!_') and not l.startswith('__anon'))
+            for line in lines:
+                symbol, file, location, type, *_ = line.split('\t')
+                location = location.removesuffix(';"')
+                if is_int(location):
+                    location = int(location)
+                else:
+                    location = (
+                        location
+                        .removesuffix("/")
+                        .removesuffix("$")
+                        .removeprefix("/^")
+                        .replace("\\\\", "\\")
+                        .replace("\\/", "/")
+                    )
+                    location = re.compile(f'^{re.escape(location)}')
+                l = self._cache.get(symbol, [])
+                l.append(Tag(
+                    symbol=symbol,
+                    file=Path(file),
+                    location=location,
+                    type=type.strip()
+                ))
+                self._cache[symbol] = l
+
+
+def is_int(s: str) -> bool:
+    if not s:
+        return False
+    if s[0] in '+-':
+        return s[1:].isdecimal() and len(s) > 1
+    return s.isdecimal()
+
+@dataclass(slots=True, frozen=True)
+class Tag:
+    symbol: str
+    file: Path
+    location: re.Pattern[str] | int
+    type: str

ctags-ls/tests/test_Tags_parsing.py

@@ -0,0 +1,20 @@
+
+import re
+from pathlib import Path
+from ctags_ls.tags import Tag, Tags
+import pytest
+
+
+tags_path = Path(__file__).parent.resolve() / 'tags'
+tags = (tag for tags in Tags(tags_path=tags_path).symbols.values() for tag in tags)
+
+@pytest.mark.parametrize("tag", tags)
+def test_tag(tag: Tag):
+    assert len(tag.type) == 1
+    assert tag.file.is_file()
+    text = tag.file.read_text()
+    if isinstance(tag.location, re.Pattern):
+        assert next(tag.location.finditer(text), None) is not None, f'{tag.location.pattern} has no matches in {tag.file}'
+    else:
+        assert text.count('\n') >= tag.location
+        assert tag.symbol in text.splitlines()[tag.location-1]

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nvim/.config/nvim/init.lua

@@ -679,6 +679,16 @@ require'lazy'.setup{ --{{{1
                 end,
             })
 
+            vim.lsp.config['ctags-ls'] = {
+                cmd={ 'ctags-ls' },
+                filetypes=nil,
+                root_dir=function(_, on_dir)
+                    on_dir(vim.fn.getcwd())
+                end,
+                capabilities = vim.lsp.protocol.make_client_capabilities()
+            }
+            vim.lsp.enable('ctags-ls')
+
             vim.keymap.set( 'n', ',fd', vim.lsp.buf.definition, { noremap = true, silent = true})
 
             vim.cmd [[
@@ -808,7 +818,6 @@ require'lazy'.setup{ --{{{1
             'hrsh7th/cmp-path',
             'dcampos/nvim-snippy',
             'dcampos/cmp-snippy',
-            'quangnguyen30192/cmp-nvim-tags',
         },
         config = function()
             local cmp = require'cmp'
@@ -827,7 +836,6 @@ require'lazy'.setup{ --{{{1
                     {
                         { name = 'snippy',   priority = 100000000000000000000 },
                         { name = 'nvim_lsp', priority = 1000000000},
-                        { name = 'tags',     priority = 100 },
                         { name = 'path',     priority = 1},
                     }
                 ),