Scope update-neovim.sh to debian: arch gets neovim from pacman; guard no-ops elsewhere

dot_config/topgrade/topgrade.toml

@@ -31,3 +31,8 @@ repos = [
     "~/Documents/Git/*"
 ]
 
+[commands]
+# Debian-only (script no-ops elsewhere): apt neovim is stale, so debian
+# machines install from the pinned binary tarball. Arch uses pacman.
+"~/.local/bin/update-neovim.sh" = "neovim"
+

dot_local/bin/update-neovim.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+# =============================================================================
+#  update-neovim.sh — chezmoi-managed, deployed to ~/.local/bin/update-neovim.sh
+#
+#  Installs or upgrades neovim from the official binary tarball.
+#  Bump NVIM_TARGET_VERSION to upgrade. Topgrade calls this via
+#  ~/.config/topgrade/topgrade.toml.
+#
+#  Debian-only: arch gets neovim from pacman (see PACMAN_PKGS in
+#  run_once_20-install-user-packages.sh.tmpl), so this is a no-op
+#  on non-debian machines.
+#
+#  Idempotent: no-op if installed version matches target.
+# =============================================================================
+set -euo pipefail
+
+OS_ID="$(. /etc/os-release 2>/dev/null && echo "$ID" || true)"
+if [[ "$OS_ID" != "debian" ]]; then
+    echo "neovim: not debian ($OS_ID) — no action"
+    exit 0
+fi
+
+NVIM_TARGET_VERSION="v0.11.4"
+
+ARCH="$(uname -m)"
+case "$ARCH" in
+    x86_64)
+        NVIM_TARBALL="nvim-linux64.tar.gz"
+        NVIM_EXTRACT_DIR="nvim-linux64"
+        ;;
+    aarch64|arm64)
+        NVIM_TARBALL="nvim-linux-arm64.tar.gz"
+        NVIM_EXTRACT_DIR="nvim-linux-arm64"
+        ;;
+    *)
+        echo "unsupported arch: $ARCH" >&2
+        exit 1
+        ;;
+esac
+
+if command -v nvim >/dev/null 2>&1; then
+    INSTALLED_VER="$(nvim --version 2>/dev/null | head -1 | awk '{print $2}')"
+    if [[ "$INSTALLED_VER" == "$NVIM_TARGET_VERSION" ]]; then
+        echo "neovim $INSTALLED_VER matches target — no action"
+        exit 0
+    fi
+    echo "neovim $INSTALLED_VER -> $NVIM_TARGET_VERSION"
+else
+    echo "installing neovim $NVIM_TARGET_VERSION"
+fi
+
+cd /tmp
+TMP_TARBALL="$(mktemp /tmp/nvim-update.XXXXXX.tar.gz)"
+trap 'rm -f "$TMP_TARBALL"' EXIT
+
+if ! curl -fL --retry 3 \
+    "https://github.com/neovim/neovim/releases/download/${NVIM_TARGET_VERSION}/${NVIM_TARBALL}" \
+    -o "$TMP_TARBALL"; then
+    echo "failed to download $NVIM_TARBALL" >&2
+    exit 1
+fi
+
+sudo rm -rf /opt/nvim-linux* /usr/local/bin/nvim
+sudo tar -xzf "$TMP_TARBALL" -C /opt/
+sudo ln -sf "/opt/${NVIM_EXTRACT_DIR}/bin/nvim" /usr/local/bin/nvim
+
+echo "neovim $NVIM_TARGET_VERSION installed"
+nvim --version | head -1

run_once_20-install-user-packages.sh.tmpl

@@ -200,8 +200,54 @@ if command -v bun >/dev/null 2>&1; then
     fi
 fi
 
-# Neovim comes from the system package (pacman list above); topgrade keeps
-# it current. No manual tarball install.
+# Neovim — debian apt ships a stale version, so install the official
+# binary tarball, pinned to a known-good version. Bump
+# NVIM_TARGET_VERSION here and in ~/.local/bin/update-neovim.sh to
+# upgrade (topgrade runs the script on debian machines).
+NVIM_TARGET_VERSION="v0.11.4"
+ARCH="$(uname -m)"
+case "$ARCH" in
+    x86_64)
+        NVIM_TARBALL="nvim-linux64.tar.gz"
+        NVIM_EXTRACT_DIR="nvim-linux64"
+        ;;
+    aarch64|arm64)
+        NVIM_TARBALL="nvim-linux-arm64.tar.gz"
+        NVIM_EXTRACT_DIR="nvim-linux-arm64"
+        ;;
+    *)
+        die "unsupported arch for neovim tarball: $ARCH"
+        ;;
+esac
+
+if command -v nvim >/dev/null 2>&1; then
+    INSTALLED_VER="$(nvim --version 2>/dev/null | head -1 | awk '{print $2}')"
+    if [[ "$INSTALLED_VER" == "$NVIM_TARGET_VERSION" ]]; then
+        log "neovim $INSTALLED_VER matches target — skipping"
+        NVIM_TARBALL=""
+    else
+        log "neovim $INSTALLED_VER != target $NVIM_TARGET_VERSION — upgrading"
+    fi
+fi
+
+if [[ -n "$NVIM_TARBALL" ]]; then
+    log "downloading neovim $NVIM_TARGET_VERSION ($NVIM_TARBALL)"
+    cd /tmp
+    if ! curl -fL --retry 3 \
+        "https://github.com/neovim/neovim/releases/download/${NVIM_TARGET_VERSION}/${NVIM_TARBALL}" \
+        -o nvim.tar.gz; then
+        die "failed to download neovim tarball"
+    fi
+    sudo rm -rf /opt/nvim-linux* /usr/local/bin/nvim
+    sudo tar -xzf nvim.tar.gz -C /opt/
+    sudo ln -sf "/opt/${NVIM_EXTRACT_DIR}/bin/nvim" /usr/local/bin/nvim
+    rm -f nvim.tar.gz
+fi
+
+# Verify neovim is reachable (PATH may need /usr/local/bin explicitly for this run)
+if ! command -v nvim >/dev/null 2>&1 && [[ -x /usr/local/bin/nvim ]]; then
+    export PATH="/usr/local/bin:$PATH"
+fi
 
 {{ else -}}
 die "unsupported os_family: {{ .os_family }}"