René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Feature: opt-in gate on Spring Boot project detection before starting LSP","articleBody":"## Use case\n\nI work in a polyglot Java environment where some projects are Spring Boot,\nmany are Jersey / plain libraries, and others are mixed-language repos\nthat happen to have a few `.java` and `.yaml` files. spring-boot.nvim's\ncurrent behaviour is to start the (fairly heavy) Spring Boot LSP for\n**every** `java` and `yaml` buffer, regardless of whether the project\nactually uses Spring Boot.\n\nFor Spring-only environments this is fine. For polyglot setups it's\nexpensive — booting a JVM-based language server you'll never use, plus\nthe LSP attaches to unrelated YAML buffers (`docker-compose.yml`,\n`.gitlab-ci.yml`, helm values, etc.).\n\n## Current behaviour\n\nThe plugin registers an autocmd (group `spring_boot_ls`) that\nunconditionally starts the Spring Boot LSP on `BufRead` / `BufNewFile` of\n`java` and `yaml` filetypes.\n\n## Proposed behaviour (opt-in)\n\nA `setup({ ... })` option such as:\n\n```lua\nrequire('spring-boot.nvim').setup({\n  -- default false (current behaviour preserved)\n  require_spring_boot_project = true,\n})\n```\n\nWhen `true`, before starting the LSP, walk up from the buffer's path\nlooking for `pom.xml` / `build.gradle[.kts]`, then grep that file for\n`spring-boot`. Only start the LSP if found.\n\nThe existing default stays unchanged, so this is non-breaking.\n\n## Prototype\n\nI'm already using a local wrapper that does exactly this — it overrides\nthe `spring_boot_ls` autocmd group with a gated version. Sketch:\n\n```lua\nlocal function is_spring_project(bufnr)\n  local root = vim.fs.root(bufnr or 0, {\n    'pom.xml', 'build.gradle', 'build.gradle.kts',\n    'settings.gradle', 'settings.gradle.kts',\n  })\n  if not root then return false end\n  for _, fname in ipairs({ 'pom.xml', 'build.gradle', 'build.gradle.kts' }) do\n    local p = root .. '/' .. fname\n    if vim.fn.filereadable(p) == 1 then\n      for _, line in ipairs(vim.fn.readfile(p, '', 500)) do\n        if line:match('spring%-boot') then return true end\n      end\n    end\n  end\n  return false\nend\n\n-- Replace each existing 'spring_boot_ls' autocmd callback with one that\n-- bails early when is_spring_project(bufnr) is false.\n```\n\nIt works well for me but it's brittle — it depends on your group name\nstaying `spring_boot_ls` and the autocmd shape staying the same. A\nproper opt-in inside the plugin would be more robust and benefit other\npolyglot users.\n\n## Questions\n\n- Would you be open to a PR adding this as an opt-in option?\n- If yes, do you have a preferred name for the option? `require_spring_boot_project`,\n  `gate_on_project_detection`, `auto_detect`, something else?\n- Does the file scan (grep `pom.xml` / `build.gradle` for `spring-boot`)\n  feel right, or would you prefer a stricter check (e.g. dependency\n  resolution via maven-resolver)?\n\nHappy to send a PR once we agree on the shape.\n\n---\n\n🤖 Filed via Claude Code on behalf of @fobbyal","author":{"url":"https://github.com/fobbyal","@type":"Person","name":"fobbyal"},"datePublished":"2026-06-05T04:01:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/30/spring-boot.nvim/issues/30"}