feat: add health check for Go availability and registered binaries

lua/glaze/health.lua

@@ -0,0 +1,87 @@
+---@brief [[
+--- glaze.nvim health check
+--- Run with :checkhealth glaze
+---@brief ]]
+
+local M = {}
+
+function M.check()
+  vim.health.start("glaze.nvim")
+
+  -- Check Neovim version
+  if vim.fn.has("nvim-0.9") == 1 then
+    vim.health.ok("Neovim >= 0.9")
+  else
+    vim.health.error("Neovim >= 0.9 required", { "Upgrade Neovim to 0.9 or later" })
+  end
+
+  -- Check Go (required)
+  if vim.fn.executable("go") == 1 then
+    local go_version = vim.fn.system("go version"):gsub("%s+$", "")
+    vim.health.ok(go_version)
+  elseif vim.fn.executable("goenv") == 1 then
+    local go_version = vim.fn.system("goenv exec go version 2>/dev/null"):gsub("%s+$", "")
+    if go_version ~= "" and not go_version:match("not found") then
+      vim.health.ok(go_version .. " (via goenv)")
+    else
+      vim.health.error("goenv found but no Go version installed", {
+        "Run: goenv install <version>",
+        "Or install Go directly: https://go.dev/dl/",
+      })
+    end
+  else
+    vim.health.error("Go not found", {
+      "Go is required for installing and updating binaries",
+      "Install from: https://go.dev/dl/",
+    })
+  end
+
+  -- Check GOBIN / GOPATH
+  local gobin = vim.env.GOBIN
+  if not gobin or gobin == "" then
+    local gopath = vim.env.GOPATH
+    if gopath and gopath ~= "" then
+      gobin = gopath .. "/bin"
+    else
+      gobin = vim.env.HOME .. "/go/bin"
+    end
+  end
+
+  if vim.fn.isdirectory(gobin) == 1 then
+    -- Check if GOBIN is in PATH
+    local path = vim.env.PATH or ""
+    if path:find(gobin, 1, true) then
+      vim.health.ok("GOBIN in PATH: " .. gobin)
+    else
+      vim.health.warn("GOBIN exists but is not in PATH: " .. gobin, {
+        "Add to PATH: export PATH=\"" .. gobin .. ":$PATH\"",
+        "Binaries installed by Glaze may not be found without this",
+      })
+    end
+  else
+    vim.health.info("GOBIN directory does not exist yet: " .. gobin)
+  end
+
+  -- Check registered binaries
+  local glaze = require("glaze")
+  local binaries = glaze.binaries()
+  local count = vim.tbl_count(binaries)
+
+  if count == 0 then
+    vim.health.info("No binaries registered (plugins will register on setup)")
+  else
+    vim.health.ok(count .. " binary(ies) registered")
+    for name, binary in pairs(binaries) do
+      if glaze.is_installed(name) then
+        vim.health.ok("  " .. name .. " — installed" .. (binary.plugin and (" (" .. binary.plugin .. ")") or ""))
+      else
+        vim.health.warn("  " .. name .. " — missing" .. (binary.plugin and (" (" .. binary.plugin .. ")") or ""), {
+          "Run :GlazeInstall " .. name,
+          "Or: go install " .. binary.url .. "@latest",
+        })
+      end
+    end
+  end
+end
+
+return M