1 files changed, 65 insertions, 0 deletions
diff --git a/lua/mason-core/installer/managers/gem.lua b/lua/mason-core/installer/managers/gem.lua
new file mode 100644
index 00000000..0eac275e
--- /dev/null
+++ b/lua/mason-core/installer/managers/gem.lua
@@ -0,0 +1,65 @@
+local installer = require "mason-core.installer"
+local log = require "mason-core.log"
+local platform = require "mason-core.platform"
+local path = require "mason-core.path"
+local Result = require "mason-core.result"
+
+local M = {}
+
+---@async
+---@param pkg string
+---@param version string
+---@param opts? { extra_packages?: string[] }
+---@nodiscard
+function M.install(pkg, version, opts)
+    opts = opts or {}
+    log.fmt_debug("gem: install %s %s %s", pkg, version, opts)
+    local ctx = installer.context()
+
+    return ctx.spawn.gem {
+        "install",
+        "--no-user-install",
+        "--no-format-executable",
+        "--install-dir=.",
+        "--bindir=bin",
+        "--no-document",
+        ("%s:%s"):format(pkg, version),
+        opts.extra_packages or vim.NIL,
+        env = {
+            GEM_HOME = ctx.cwd:get(),
+        },
+    }
+end
+
+---@async
+---@param bin string
+---@nodiscard
+function M.create_bin_wrapper(bin)
+    local ctx = installer.context()
+
+    local bin_path = platform.when {
+        unix = function()
+            return path.concat { "bin", bin }
+        end,
+        win = function()
+            return path.concat { "bin", ("%s.bat"):format(bin) }
+        end,
+    }
+
+    if not ctx.fs:file_exists(bin_path) then
+        return Result.failure(("Cannot link Gem executable %q because it doesn't exist."):format(bin))
+    end
+
+    return Result.pcall(ctx.write_shell_exec_wrapper, ctx, bin, path.concat { ctx.package:get_install_path(), bin_path }, {
+        GEM_PATH = platform.when {
+            unix = function()
+                return ("%s:$GEM_PATH"):format(ctx.package:get_install_path())
+            end,
+            win = function()
+                return ("%s;%%GEM_PATH%%"):format(ctx.package:get_install_path())
+            end,
+        },
+    })
+end
+
+return M