dev: minimal-config launchers for nvim/vim plugin testing

Two scripts at the repo root that spin up an isolated editor session
against this checkout, so changes to the plugin or LSP can be smoke-
tested without polluting the user's real (n)vim install:

- start-nvim.sh — builds nuwiki-ls in release mode, symlinks it into
  `bin/`, seeds a scratch wiki under `$XDG_CACHE_HOME/nuwiki-dev/wiki`,
  generates a minimal `init.lua` that prepends this repo to
  `runtimepath`, points `vim.env.XDG_*` at the dev cache so the host's
  Neovim state is untouched, and execs `nvim --clean -u <init>`.

- start-vim.sh — same shape for Vim. Clones vim-lsp + async.vim into
  the dev cache on first run so the LSP path is actually exercisable
  (the plugin's autoload layer prefers vim-lsp). Opt-out via
  `NUWIKI_DEV_NO_LSP=1` for syntax-only testing.

Both scripts:
- Are idempotent (skip cargo build / git clone / wiki seed when their
  outputs are already in place).
- Pass through extra args to the editor; default to opening the
  scratch wiki's index page.
- Accept `NUWIKI_DEV_WIKI=<path>` to point at a custom sandbox.
- Seed `index.wiki` + `Notes.wiki` with smoke-test content covering
  wikilinks, anchors, checkboxes, tags, and the `:Vimwiki*` command
  surface.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

start-nvim.sh

@@ -0,0 +1,147 @@
+#!/usr/bin/env bash
+#
+# start-nvim.sh — launch Neovim with a minimal config that loads nuwiki.
+#
+# Builds the language server (release mode), symlinks it into `bin/` so
+# the plugin's default install path resolves, then spawns Neovim with
+# `--clean` and a generated `init.lua` that:
+#   * adds this repo to `runtimepath`
+#   * configures wiki_root to a scratch directory under
+#     $XDG_CACHE_HOME/nuwiki-dev/wiki
+#   * calls `require('nuwiki').setup({...})`
+#
+# Usage: ./start-nvim.sh [extra args...]
+#   ./start-nvim.sh                       # open the scratch wiki's index
+#   ./start-nvim.sh path/to/note.wiki     # open a specific file
+#   NUWIKI_DEV_WIKI=/tmp/foo ./start-nvim.sh
+#
+# Tested with Neovim 0.10+. State (cache/data/config) lives under
+# $XDG_CACHE_HOME/nuwiki-dev/ so your real Neovim install stays
+# untouched.
+
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+DEV_DIR="${XDG_CACHE_HOME:-$HOME/.cache}/nuwiki-dev"
+WIKI_DIR="${NUWIKI_DEV_WIKI:-$DEV_DIR/wiki}"
+INIT_FILE="$DEV_DIR/init.lua"
+STATE_DIR="$DEV_DIR/nvim-state"
+DATA_DIR="$DEV_DIR/nvim-data"
+CONFIG_DIR="$DEV_DIR/nvim-config"
+
+log() { printf '\033[1;34m[nuwiki-dev]\033[0m %s\n' "$*"; }
+
+ensure_binary() {
+  local bin="$REPO_ROOT/bin/nuwiki-ls"
+  local built="$REPO_ROOT/target/release/nuwiki-ls"
+  if [[ -x "$bin" ]]; then
+    return
+  fi
+  log "building nuwiki-ls (release)…"
+  cargo build --release -p nuwiki-ls --manifest-path "$REPO_ROOT/Cargo.toml"
+  mkdir -p "$REPO_ROOT/bin"
+  ln -sf "$built" "$bin"
+  log "binary ready: $bin"
+}
+
+seed_wiki() {
+  mkdir -p "$WIKI_DIR" "$WIKI_DIR/diary"
+  if [[ ! -f "$WIKI_DIR/index.wiki" ]]; then
+    cat > "$WIKI_DIR/index.wiki" <<'EOF'
+= Welcome to nuwiki =
+
+This is a scratch wiki created by start-nvim.sh. Edit, run commands,
+or jump to the linked pages to test the plugin.
+
+== Smoke test ==
+
+- [[Notes]]
+- [[diary/]]
+- [ ] Toggle me with <C-Space>
+- [ ] Or with :VimwikiToggleListItem
+
+== Commands to try ==
+
+- :VimwikiTOC
+- :VimwikiGenerateLinks
+- :VimwikiCheckLinks
+- :VimwikiMakeDiaryNote
+- :Vimwiki2HTMLBrowse
+
+== Tags ==
+
+:smoke-test:sandbox:
+
+== Links ==
+
+* [[Notes]]
+* [[Notes#section-one]]
+* https://example.com
+EOF
+  fi
+  if [[ ! -f "$WIKI_DIR/Notes.wiki" ]]; then
+    cat > "$WIKI_DIR/Notes.wiki" <<'EOF'
+= Notes =
+
+A second page so [[index]] has somewhere to point.
+
+== Section one ==
+
+Anchor target for :checkhealth-style smoke tests.
+EOF
+  fi
+}
+
+write_init() {
+  mkdir -p "$DEV_DIR"
+  cat > "$INIT_FILE" <<EOF
+-- start-nvim.sh: generated minimal config for nuwiki development.
+-- Regenerated on every launch; edit start-nvim.sh, not this file.
+
+-- Confine state to the dev cache so we never touch the user's real
+-- Neovim install.
+vim.env.XDG_STATE_HOME = '$STATE_DIR'
+vim.env.XDG_DATA_HOME = '$DATA_DIR'
+vim.env.XDG_CONFIG_HOME = '$CONFIG_DIR'
+
+vim.opt.runtimepath:prepend('$REPO_ROOT')
+
+vim.g.nuwiki_binary_path = '$REPO_ROOT/bin/nuwiki-ls'
+
+-- Friendly defaults for an interactive smoke test.
+vim.opt.number = true
+vim.opt.signcolumn = 'yes'
+vim.opt.termguicolors = true
+vim.opt.swapfile = false
+vim.opt.writebackup = false
+vim.opt.undofile = false
+vim.g.mapleader = ' '
+
+require('nuwiki').setup({
+  wiki_root = '$WIKI_DIR',
+})
+
+-- Surface log lines (the LSP logs via window/logMessage). Without this
+-- they're swallowed; with it they land in :messages.
+vim.lsp.set_log_level('info')
+
+print('[nuwiki-dev] ready — wiki root: $WIKI_DIR')
+print('[nuwiki-dev] :LspInfo to inspect, :checkhealth nuwiki for diagnostics')
+EOF
+}
+
+main() {
+  ensure_binary
+  seed_wiki
+  write_init
+  mkdir -p "$STATE_DIR" "$DATA_DIR" "$CONFIG_DIR"
+
+  log "launching: nvim --clean -u $INIT_FILE"
+  if [[ $# -gt 0 ]]; then
+    exec nvim --clean -u "$INIT_FILE" "$@"
+  else
+    exec nvim --clean -u "$INIT_FILE" "$WIKI_DIR/index.wiki"
+  fi
+}
+
+main "$@"