feat(health): don't warn if nvim-dap is not configured

lua/rustaceanvim/health.lua

@@ -5,18 +5,28 @@ local health = {}
 local h = vim.health
 
 ---@class rustaceanvim.LuaDependency
----@field module string The name of a module
----@field optional fun():boolean Function that returns whether the dependency is optional
+---@field name string The name of the dependency
+---@field module string The name of a module to check for
+---@field is_optional fun():boolean Function that returns whether the dependency is optional
+---@field is_configured fun():boolean Function that returns whether the dependency is configured
 ---@field url string URL (markdown)
 ---@field info string Additional information
 
 ---@type rustaceanvim.LuaDependency[]
 local lua_dependencies = {
   {
+    name = 'nvim-dap',
     module = 'dap',
-    optional = function()
+    is_optional = function()
       return true
     end,
+    is_configured = function()
+      local rustaceanvim_opts = type(vim.g.rustaceanvim) == 'function' and vim.g.rustaceanvim()
+        or vim.g.rustaceanvim
+        or {}
+      local dap_opts = vim.tbl_get(rustaceanvim_opts, 'dap')
+      return type(dap_opts) == 'table'
+    end,
     url = '[mfussenegger/nvim-dap](https://github.com/mfussenegger/nvim-dap)',
     info = 'Needed for debugging features',
   },
@@ -27,7 +37,7 @@ local lua_dependencies = {
 ---@field required_version_spec? string Version range spec. See `vim.version.range()`
 ---@field get_binaries fun():string[] Function that returns the binaries to check for
 ---@field is_installed? fun(bin: string):boolean Default: `vim.fn.executable(bin) == 1`
----@field optional fun():boolean Function that returns whether the dependency is optional
+---@field is_optional fun():boolean Function that returns whether the dependency is optional
 ---@field url string URL (markdown)
 ---@field info string Additional information
 ---@field extra_checks_if_installed? fun(bin: string) Optional extra checks to perform if the dependency is installed
@@ -39,10 +49,14 @@ local function check_lua_dependency(dep)
     h.ok(dep.url .. ' installed.')
     return
   end
-  if dep.optional() then
-    h.warn(('%s not installed. %s %s'):format(dep.module, dep.info, dep.url))
+  if dep.is_optional() then
+    if dep.is_configured() then
+      h.warn(('optional dependency %s is configured, but not installed. %s %s'):format(dep.name, dep.info, dep.url))
+    else
+      h.ok(('optional dependency %s not installed. %s %s'):format(dep.name, dep.info, dep.url))
+    end
   else
-    error(('Lua dependency %s not found: %s'):format(dep.module, dep.url))
+    error(('Lua dependency %s not found: %s'):format(dep.name, dep.url))
   end
 end
 
@@ -94,7 +108,7 @@ local function check_external_dependency(dep)
     end
     return
   end
-  if not dep.optional() then
+  if not dep.is_optional() then
     h.error(([[
       %s: not found: %s
       rustaceanvim requires %s.
@@ -209,7 +223,7 @@ function health.check()
         end)
         return success
       end,
-      optional = function()
+      is_optional = function()
         return false
       end,
       url = '[rust-analyzer](https://rust-analyzer.github.io/)',
@@ -232,7 +246,7 @@ function health.check()
         end)
         return success
       end,
-      optional = function()
+      is_optional = function()
         return true
       end,
       url = '[ra-multiplex](https://github.com/pr2502/ra-multiplex)',
@@ -243,7 +257,7 @@ function health.check()
       get_binaries = function()
         return { 'cargo' }
       end,
-      optional = function()
+      is_optional = function()
         return true
       end,
       url = '[Cargo](https://doc.rust-lang.org/cargo/)',
@@ -258,7 +272,7 @@ function health.check()
       get_binaries = function()
         return { 'rustc' }
       end,
-      optional = function()
+      is_optional = function()
         return true
       end,
       url = '[rustc](https://doc.rust-lang.org/rustc/what-is-rustc.html)',
@@ -275,7 +289,7 @@ function health.check()
       get_binaries = function()
         return { config.tools.cargo_override }
       end,
-      optional = function()
+      is_optional = function()
         return true
       end,
       url = '',