fix(docker_language_server): set language id for compose files #3990

This adds a `get_language_id()` handler to the docker language server
config to correctly set the language ID to `dockercompose` as expected
by the server. Before this change, the nvim filetype of
`yaml.docker-compose` was passed to the server as the language ID,
resulting in in a docker compose file being misinterpreted as a
Dockerfile.

See also: e3d837b938bd1d7e84c3eb0362b6761e4d5dc15d / #3982

1 files changed, 7 insertions, 0 deletions

diff --git a/lsp/docker_language_server.lua b/lsp/docker_language_server.lua
index 76236ffa..38f74f67 100644
--- a/lsp/docker_language_server.lua
+++ b/lsp/docker_language_server.lua
@@ -9,6 +9,13 @@
 return {
   cmd = { 'docker-language-server', 'start', '--stdio' },
   filetypes = { 'dockerfile', 'yaml.docker-compose' },
+  get_language_id = function(_, ftype)
+    if ftype == 'yaml.docker-compose' or ftype:lower():find('ya?ml') then
+      return 'dockercompose'
+    else
+      return ftype
+    end
+  end,
   root_markers = {
     'Dockerfile',
     'docker-compose.yaml',