add server psalm (#426)

Co-authored-by: William Boman <william@redwill.se>

1 files changed, 43 insertions, 0 deletions

diff --git a/lua/nvim-lsp-installer/installers/composer.lua b/lua/nvim-lsp-installer/installers/composer.lua
index 1e8a1717..26e4e7be 100644
--- a/lua/nvim-lsp-installer/installers/composer.lua
+++ b/lua/nvim-lsp-installer/installers/composer.lua
@@ -2,6 +2,11 @@ local installers = require "nvim-lsp-installer.installers"
 local std = require "nvim-lsp-installer.installers.std"
 local platform = require "nvim-lsp-installer.platform"
 local process = require "nvim-lsp-installer.process"
+local fs = require "nvim-lsp-installer.fs"
+local path = require "nvim-lsp-installer.path"
+local Data = require "nvim-lsp-installer.data"
+
+local list_copy = Data.list_copy
 
 local M = {}
 
@@ -18,6 +23,37 @@ local function ensure_composer(installer)
     }
 end
 
+---@param packages string[] The composer packages to install. The first item in this list will be the recipient of the server version, should the user request a specific one.
+function M.require(packages)
+    return ensure_composer(
+        ---@type ServerInstallerFunction
+        function(_, callback, ctx)
+            local pkgs = list_copy(packages)
+            local c = process.chain {
+                cwd = ctx.install_dir,
+                stdio_sink = ctx.stdio_sink,
+            }
+
+            ctx.receipt:with_primary_source(ctx.receipt.composer(pkgs[1]))
+            for i = 2, #pkgs do
+                ctx.receipt:with_secondary_source(ctx.receipt.composer(pkgs[i]))
+            end
+
+            if not (fs.file_exists(path.concat { ctx.install_dir, "composer.json" })) then
+                c.run(M.composer_cmd, { "init", "--no-interaction", "--stability=stable" })
+            end
+
+            if ctx.requested_server_version then
+                -- The "head" package is the recipient for the requested version. It's.. by design... don't ask.
+                pkgs[1] = ("%s:%s"):format(pkgs[1], ctx.requested_server_version)
+            end
+
+            c.run(M.composer_cmd, vim.list_extend({ "require" }, pkgs))
+            c.spawn(callback)
+        end
+    )
+end
+
 function M.install()
     return ensure_composer(
         ---@type ServerInstallerFunction
@@ -37,4 +73,11 @@ function M.install()
     )
 end
 
+---@param root_dir string The directory to resolve the executable from.
+function M.env(root_dir)
+    return {
+        PATH = process.extend_path { path.concat { root_dir, "vendor", "bin" } },
+    }
+end
+
 return M