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-- FIXME: the following error is emmitted when starting up jdtls:
-- ERROR No LSP client found that supports vscode.java.resolveMainClass
local map, auto = core.misc.map, core.misc.auto
local ok, jdtls = pcall(require, "jdtls")
if not ok then
vim.notify("jdtls not loaded, can't setup jdtls lsp or dap",
vim.log.levels.INFO, {})
return
end
local jdtls_install = core.mason.get_pkg_path("jdtls")
local java_dap_install = core.mason.get_pkg_path("java-debug-adapter")
-- make sure to check if things with 💀 need updating
local config = {
cmd = {
"/usr/lib/jvm/openjdk21/bin/java", -- 💀
"-jar", -- 💀
vim.fn.glob(vim.fs.joinpath(jdtls_install, "plugins/org.eclipse.equinox.launcher_*.jar")),
"-configuration", jdtls_install.."config_linux",
"-data", vim.fn.stdpath("cache").."/nvim-jdtls",
"--add-modules=ALL-SYSTEM",
"--add-opens", "java.base/java.lang=ALL-UNNAMED",
"--add-opens", "java.base/java.util=ALL-UNNAMED",
"-Declipse.application=org.eclipse.jdt.ls.core.id1",
"-Declipse.product=org.eclipse.jdt.ls.core.product",
"-Dlog.level=ALL",
"-Dlog.protocol=true",
"-Dosgi.bundles.defaultStartLevel=4",
"-Xmx1G"
},
root_dir = vim.fs.dirname(vim.fs.find({
"gradlew",
".git",
"mvnw",
"settings.gradle", -- Gradle (multi-project)
"settings.gradle.kts", -- Gradle (multi-project)
"build.xml", -- Ant
"pom.xml" -- Maven
}, { upward = true })[1]),
on_attach = function(_, bufnr)
jdtls.setup.add_commands()
-- add some jdtls specific mappings
local opts = { buffer = bufnr }
map("n", "cri", jdtls.organize_imports, opts)
map("n", "crv", jdtls.extract_variable, opts)
map("n", "crc", jdtls.extract_constant, opts)
map("x", "crv", function() jdtls.extract_variable(true) end, opts)
map("x", "crc", function() jdtls.extract_constant(true) end, opts)
map("x", "crm", function() jdtls.extract_method(true) end, opts)
-- do some refreshes often because I don't trust jdtls
pcall(vim.lsp.codelens.refresh)
auto("BufWritePost", {
buffer = bufnr,
desc = "refresh codelens",
callback = function()
pcall(vim.lsp.codelens.refresh)
end
})
-- setup nvim-dap
local ok, dap = pcall(require, "dap")
if not ok then
vim.notify("dap not loaded can't setup dap for jdtls",
vim.log.levels.INFO, {})
return
end
dap.adapters.java = nil -- remove any old java adapters
jdtls.setup_dap({ hotcodereplace = "auto" })
require("jdtls.dap").setup_dap_main_class_configs()
end,
-- don"t print out status messages
handlers = {
["language/status"] = function() end
},
init_options = {
bundles = {
vim.fs.joinpath(java_dap_install,
vim.fn.glob("extension/server/com.microsoft.java.debug.plugin-*.jar",
true)
)
}
}
}
-- generate the path to the java file(s)
---@type string?
local cache_path = vim.fs.joinpath(vim.fn.stdpath("cache"),
"/JavaVersion.class")
---@type string?
local src_path = vim.fs.joinpath(vim.fn.stdpath("config"),
"/extras/JavaVersion.java")
-- if either path is invalid
if not cache_path or not src_path then
return
end
--- build a cache of the JavaVersion code
local function build_cache()
-- check if we have javac
if vim.fn.executable("javac") ~= 1 then
cache_path = nil
return
end
-- compile our code
vim.system({ "javac", src_path, "-d", vim.fn.stdpath("cache"), }, {},
function(out)
if out.code ~= 0 then
cache_path = nil
end
end)
end
-- check if we have a compiled version of JavaVersion
local f, _ = io.open(cache_path, "r")
if not f then -- if we don"t have a cache
build_cache()
else
io.close(f)
end
local function version_check()
-- check the java version
local out = vim.system({
config.cmd[1], -- use the same java executable that the lsp will be using
(cache_path and "JavaVersion") or src_path
}, { cwd = vim.fn.stdpath("cache"), text = true }):wait()
-- parse the version information aquired
local v = vim.version.parse(out.stdout)
-- if there's an error, no version info, or the java version is
-- less than 21 stop the lsp from starting
if out.code ~= 0 then
vim.notify(string.format(
"java version check failed: exit code %s", out.code),
vim.log.levels.ERROR, { title = core.misc.appid })
vim.notify(string.format(
"%s", vim.inspect(out.stdout)),
vim.log.levels.ERROR, { title = core.misc.appid })
return false
elseif not v then
vim.notify("no java version info found", vim.log.levels.ERROR,
{ title = core.misc.appid })
return false
elseif v.major < 21 then
vim.notify(string.format(
"java version %s < 21.0.0 Cannot run jdtls, bailing out",
v[1].."."..v[2].."."..v[3]),
vim.log.levels.ERROR, { title = core.misc.appid })
return false
end
return true
end
-- start the jdtls with dap!
if not version_check() then
return
end
jdtls.start_or_attach(config)
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