feat(rocks): use hererocks to install luarocks when luarocks is not found

lua/lazy/core/config.lua

@@ -49,6 +49,8 @@ M.defaults = {
     enabled = true,
     root = vim.fn.stdpath("data") .. "/lazy-rocks",
     server = "https://nvim-neorocks.github.io/rocks-binaries/",
+    -- use hererocks to install luarocks.
+    hererocks = vim.fn.executable("luarocks") == 0,
   },
   dev = {
     ---@type string | fun(plugin: LazyPlugin): string directory where you store your local plugin projects

lua/lazy/core/meta.lua

@@ -33,7 +33,9 @@ function M:load_pkgs()
   if not Config.options.pkg.enabled then
     return
   end
+  local have_rockspec = false
   for _, pkg in ipairs(Pkg.get()) do
+    have_rockspec = have_rockspec or pkg.source == "rockspec"
     local meta, fragment = self:add(pkg.spec)
     if meta and fragment then
       meta._.pkg = pkg
@@ -46,6 +48,12 @@ function M:load_pkgs()
       self.pkgs[pkg.dir] = fragment.id
     end
   end
+  if have_rockspec then
+    local hererocks = Pkg.hererocks()
+    if hererocks then
+      self:add(hererocks)
+    end
+  end
 end
 
 --- Remove a plugin and all its fragments.

lua/lazy/core/plugin.lua

@@ -264,8 +264,10 @@ function M.update_rocks_state()
   end)
 
   for _, plugin in pairs(Config.plugins) do
-    if plugin._.pkg and plugin._.pkg.source == "rockspec" and plugin.build == "rockspec" then
+    if plugin.build == "rockspec" then
       plugin._.build = not installed[plugin.name]
+    elseif plugin.name == "hererocks" then
+      plugin._.build = not vim.uv.fs_stat(Config.options.rocks.root .. "/hererocks")
     end
   end
 end

lua/lazy/manage/task/plugin.lua

@@ -18,8 +18,25 @@ local B = {}
 
 ---@param task LazyTask
 function B.rockspec(task)
+  ---@type table<string, string>
+  local env = {}
+
+  if Config.options.rocks.hererocks then
+    local hererocks = Config.options.rocks.root .. "/hererocks"
+    local sep = jit.os:find("Windows") and ";" or ":"
+    local path = vim.split(vim.env.PATH, sep)
+    table.insert(path, 1, hererocks .. "/bin")
+    env = {
+      PATH = table.concat(path, sep),
+    }
+    local plugin = Config.plugins.hererocks
+    -- hererocks is still building, so skip for now
+    if plugin and plugin._.build then
+      return
+    end
+  end
+
   local root = Config.options.rocks.root .. "/" .. task.plugin.name
-  vim.fn.mkdir(root, "p")
   task:spawn("luarocks", {
     args = {
       "--tree",
@@ -33,6 +50,7 @@ function B.rockspec(task)
       "--force-fast",
     },
     cwd = task.plugin.dir,
+    env = env,
   })
 end
 

lua/lazy/pkg/init.lua

@@ -112,6 +112,32 @@ local function _load()
   Util.track()
 end
 
+---@return LazyPluginSpec?, string?
+function M.hererocks()
+  if not (Config.options.rocks.enabled and Config.options.rocks.hererocks) then
+    return
+  end
+
+  local root = Config.options.rocks.root .. "/hererocks"
+
+  local cmd = {
+    "python",
+    "hererocks.py",
+    "--verbose",
+    "-l",
+    "5.1",
+    "-r",
+    "latest",
+    root,
+  }
+
+  return {
+    "luarocks/hererocks",
+    lazy = true,
+    build = table.concat(cmd, " "),
+  }, root
+end
+
 ---@param dir string
 ---@return LazyPkg?
 ---@overload fun():LazyPkg[]