Let Neovim's current line and status line show the terminal background on existing installs (#15024)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

test/shell.d/nvim-transparent-lines-migration-test.sh

@@ -0,0 +1,84 @@
+#!/bin/bash
+
+set -euo pipefail
+
+source "$(dirname "$0")/base-test.sh"
+
+test_dir=$(mktemp -d)
+trap 'rm -rf "$test_dir"' EXIT
+
+config="$test_dir/.config/nvim"
+package="$test_dir/package"
+transparency="plugin/after/transparency.lua"
+lualine="lua/plugins/lualine-transparent.lua"
+
+mkdir -p "$package/plugin/after" "$package/lua/plugins"
+printf -- '-- new transparency\n' >"$package/$transparency"
+printf -- '-- lualine\n' >"$package/$lualine"
+printf -- '-- shipped transparency\n' >"$test_dir/shipped.lua"
+
+# The real package and shipped files live outside this repo, so the migration
+# reads a stand-in package and knows the stand-in shipped file by its hash.
+shipped_hash=$(sha256sum <"$test_dir/shipped.lua" | cut -c1-64)
+sed -e "s@/usr/share/omarchy-nvim/config@$package@" \
+  -e "s@6e31b917f13e16514ac94ff9270d47f24e76509a3e559ca85116a5aa2d61306a@$shipped_hash@" \
+  "$ROOT/migrations/1791723398.sh" >"$test_dir/migration.sh"
+
+run_migration() {
+  HOME="$test_dir" bash -euo pipefail "$test_dir/migration.sh" >/dev/null 2>&1
+}
+
+reset_config() {
+  rm -rf "$config"
+  mkdir -p "$config/plugin/after" "$config/lua/plugins"
+  cp "$test_dir/shipped.lua" "$config/$transparency"
+}
+
+reset_config
+run_migration
+run_migration
+cmp -s "$config/$transparency" "$package/$transparency" && cmp -s "$config/$lualine" "$package/$lualine" ||
+  fail "a shipped config takes the package's transparency file and lualine spec"
+[[ -z $(find "$config" -name '*.new.*') ]] || fail "no staged files are left behind"
+pass "a shipped config takes the package's transparency file and lualine spec"
+
+reset_config
+printf -- '-- mine\n' >"$config/$transparency"
+printf -- '-- my lualine\n' >"$config/$lualine"
+run_migration
+[[ $(<"$config/$transparency") == "-- mine" && $(<"$config/$lualine") == "-- my lualine" ]] ||
+  fail "files the user changed or added are kept"
+pass "files the user changed or added are kept"
+
+reset_config
+mkdir -p "$test_dir/dotfiles"
+mv "$config/plugin" "$test_dir/dotfiles/plugin"
+ln -s "$test_dir/dotfiles/plugin" "$config/plugin"
+run_migration
+cmp -s "$config/$transparency" "$test_dir/shipped.lua" && [[ ! -e $config/$lualine ]] ||
+  fail "a config a dotfile manager links in is left alone"
+pass "a config a dotfile manager links in is left alone"
+
+# An older package leaves the migration pending to run again after the update.
+reset_config
+mv "$package/$lualine" "$test_dir/lualine.lua"
+if run_migration; then
+  fail "an older package leaves the migration pending"
+fi
+mv "$test_dir/lualine.lua" "$package/$lualine"
+pass "an older package leaves the migration pending"
+
+reset_config
+chmod a-w "$config/plugin/after"
+if run_migration; then
+  chmod u+w "$config/plugin/after"
+  fail "a write that fails leaves the migration pending"
+fi
+chmod u+w "$config/plugin/after"
+cmp -s "$config/$transparency" "$test_dir/shipped.lua" || fail "a write that fails leaves the file as it was"
+pass "a write that fails leaves the migration pending and the file as it was"
+
+rm -rf "$config"
+run_migration
+[[ ! -e $config ]] || fail "a missing Neovim config is not created"
+pass "a missing Neovim config is not created"