fix(ci): run all nvim validations in a single container

Replace per-step docker run commands (which failed due to DinD bind-mount
path mismatch between act runner and host Docker daemon) with a single
docker run executing test/ci_validate.sh. Bootstrap lazy.nvim and all
plugin installs happen inside the same container where git and network
are both available.

Author: Venkata Subramani Renduchintala

.github/workflows/validate.yml

@@ -38,60 +38,12 @@ jobs:
       - name: Check Neovim version
         run: docker run --rm nvim-config:ci nvim --version
 
-      - name: Prepare plugin data directory
-        run: |
-          mkdir -p $HOME/.local/share/nvim-ci
-          chmod 777 $HOME/.local/share/nvim-ci
-
-      - name: Cache lazy.nvim plugins
-        uses: actions/cache@v4
-        with:
-          path: ~/.local/share/nvim-ci
-          key: nvim-plugins-${{ hashFiles('lua/plugins/**/*.lua') }}
-          restore-keys: nvim-plugins-
-
-      - name: Install plugins via lazy.nvim
-        run: |
-          docker run --rm \
-            -e CI=true \
-            -v "${{ github.workspace }}:/home/dev/.config/nvim:ro" \
-            -v "$HOME/.local/share/nvim-ci:/home/dev/.local/share/nvim" \
-            nvim-config:ci \
-            nvim --headless \
-              -c "lua require('lazy').sync({wait=true, show=false})" \
-              -c "qall"
-        timeout-minutes: 15
-
-      - name: Validate Neovim loads with all plugins
-        run: |
-          docker run --rm \
-            -e CI=true \
-            -v "${{ github.workspace }}:/home/dev/.config/nvim:ro" \
-            -v "$HOME/.local/share/nvim-ci:/home/dev/.local/share/nvim" \
-            nvim-config:ci \
-            nvim --headless -c "qall"
-        timeout-minutes: 2
-
-      - name: Install treesitter parsers (Go, Terraform, HCL)
-        run: |
-          docker run --rm \
-            -e CI=true \
-            -v "${{ github.workspace }}:/home/dev/.config/nvim:ro" \
-            -v "$HOME/.local/share/nvim-ci:/home/dev/.local/share/nvim" \
-            nvim-config:ci \
-            nvim --headless \
-              -c "luafile /home/dev/.config/nvim/test/install_parsers.lua" \
-              -c "qall"
-        timeout-minutes: 10
-
-      - name: Test Go and Terraform treesitter parsers
+      - name: Run all Neovim validations
         run: |
           docker run --rm \
+            --network=host \
             -e CI=true \
             -v "${{ github.workspace }}:/home/dev/.config/nvim:ro" \
-            -v "$HOME/.local/share/nvim-ci:/home/dev/.local/share/nvim" \
             nvim-config:ci \
-            nvim --headless \
-              -c "luafile /home/dev/.config/nvim/test/validate_treesitter.lua" \
-              -c "qall"
-        timeout-minutes: 2
+            bash /home/dev/.config/nvim/test/ci_validate.sh
+        timeout-minutes: 30

test/ci_install_plugins.lua

@@ -0,0 +1,11 @@
+-- Headless lazy.nvim plugin installer for CI.
+-- Exits 1 loudly if lazy.nvim is not loadable or sync fails.
+local ok, lazy = pcall(require, 'lazy')
+if not ok then
+  io.stderr:write('FATAL: lazy.nvim not loadable: ' .. tostring(lazy) .. '\n')
+  vim.cmd('cquit 1')
+end
+
+print('lazy.nvim loaded, starting sync...')
+lazy.sync({ wait = true, show = false })
+print('lazy.nvim sync complete')

test/ci_validate.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -e
+
+echo "=== Bootstrapping lazy.nvim ==="
+git clone --filter=blob:none \
+  https://github.com/folke/lazy.nvim.git \
+  --branch=stable \
+  "$HOME/.local/share/nvim/lazy/lazy.nvim"
+
+echo "=== Installing plugins via lazy.nvim ==="
+nvim --headless \
+  -c "luafile /home/dev/.config/nvim/test/ci_install_plugins.lua" \
+  -c "qall"
+
+echo "=== Validating Neovim startup with all plugins ==="
+nvim --headless -c "qall"
+
+echo "=== Installing treesitter parsers (Go, Terraform, HCL) ==="
+nvim --headless \
+  -c "luafile /home/dev/.config/nvim/test/install_parsers.lua" \
+  -c "qall"
+
+echo "=== Testing Go and Terraform treesitter parsers ==="
+nvim --headless \
+  -c "luafile /home/dev/.config/nvim/test/validate_treesitter.lua" \
+  -c "qall"
+
+echo "=== All validations passed! ==="