fix(windows): unset PSMODULEPATH before invoking powershell scripts (#278)

3 files changed, 11 insertions, 4 deletions

diff --git a/lua/nvim-lsp-installer/installers/context.lua b/lua/nvim-lsp-installer/installers/context.lua
index 97f200d5..bdb993a5 100644
--- a/lua/nvim-lsp-installer/installers/context.lua
+++ b/lua/nvim-lsp-installer/installers/context.lua
@@ -44,6 +44,7 @@ local function fetch(url, callback)
             process.lazy_spawn("powershell.exe", {
                 args = { "-NoProfile", "-Command", table.concat(ps_script, ";") },
                 stdio_sink = stdio.sink,
+                env = process.graft_env({}, { "PSMODULEPATH" }),
             })
         )
     end
diff --git a/lua/nvim-lsp-installer/installers/shell.lua b/lua/nvim-lsp-installer/installers/shell.lua
index 33d603a9..34cfc524 100644
--- a/lua/nvim-lsp-installer/installers/shell.lua
+++ b/lua/nvim-lsp-installer/installers/shell.lua
@@ -11,7 +11,9 @@ local function shell(opts)
             args = opts.args,
             cwd = context.install_dir,
             stdio_sink = context.stdio_sink,
-            env = process.graft_env(opts.env or {}),
+            env = process.graft_env(opts.env or {}, {
+                "PSMODULEPATH", -- https://github.com/williamboman/nvim-lsp-installer/issues/271
+            }),
         }, callback)
 
         if stdio then
diff --git a/lua/nvim-lsp-installer/process.lua b/lua/nvim-lsp-installer/process.lua
index 7fe3625c..9316fd38 100644
--- a/lua/nvim-lsp-installer/process.lua
+++ b/lua/nvim-lsp-installer/process.lua
@@ -47,15 +47,19 @@ end
 
 ---Merges the provided env param with the user's full environent. Provided env has precedence.
 ---@param env table<string, string>
-function M.graft_env(env)
+---@param excluded_var_names string[]|nil
+function M.graft_env(env, excluded_var_names)
+    local excluded_var_names_set = excluded_var_names and Data.set_of(excluded_var_names) or {}
     local merged_env = {}
     for key, val in pairs(initial_environ) do
-        if env[key] == nil then
+        if not excluded_var_names_set[key] and env[key] == nil then
             merged_env[#merged_env + 1] = key .. "=" .. val
         end
     end
     for key, val in pairs(env) do
-        merged_env[#merged_env + 1] = key .. "=" .. val
+        if not excluded_var_names_set[key] then
+            merged_env[#merged_env + 1] = key .. "=" .. val
+        end
     end
     return merged_env
 end