add install.sh and keep empty portage dirs trackable

1 files changed, 123 insertions, 0 deletions

diff --git a/install.sh b/install.sh
new file mode 100755
index 0000000..86435cf
--- /dev/null
+++ b/install.sh
@@ -0,0 +1,123 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+TMP_ERR="$(mktemp)"
+trap 'rm -f "$TMP_ERR"' EXIT
+
+# Packages whose config lives in a well-formed directory (stowable from repo root)
+STOW_PKGS=(
+  darkman doom fastfetch foot gtk matugen mpv niri nvim rmpc starship
+  tmux vicinae wallust waybar xdg-desktop-portal yazi zshrc
+)
+
+# Empty portage dirs, recreated because git does not track empty directories
+PORTAGE_EMPTY_DIRS=(
+  package.mask
+  postsync.d
+  profile/package.use.force
+)
+
+log()  { printf '\033[1;32m[install]\033[0m %s\n' "$*"; }
+warn() { printf '\033[1;33m[warn]\033[0m %s\n' "$*"; }
+die()  { printf '\033[1;31m[fatal]\033[0m %s\n' "$*" >&2; exit 1; }
+
+run_root() {
+  if [[ $EUID -eq 0 ]]; then
+    "$@"
+  elif command -v sudo >/dev/null 2>&1; then
+    sudo "$@"
+  else
+    die "need root (use: $0 as root, or install sudo)"
+  fi
+}
+
+need_stow() {
+  if command -v stow >/dev/null 2>&1; then
+    log "GNU Stow found: $(stow --version 2>/dev/null | head -n1 || true)"
+    return
+  fi
+  warn "GNU Stow not installed — installing app-admin/stow"
+  run_root emerge --ask app-admin/stow
+}
+
+stow_dotfiles() {
+  cd "$REPO_DIR"
+  local ok=0 fail=0
+  for pkg in "${STOW_PKGS[@]}"; do
+    if [[ ! -d "$pkg" ]]; then
+      warn "package dir '$pkg' missing — skipped"
+      continue
+    fi
+    if stow -R -v "$pkg" >"$TMP_ERR" 2>&1; then
+      printf '  %s\n' "$(grep '^LINK' "$TMP_ERR" || true)"
+      ok=$((ok + 1))
+    else
+      warn "stow '$pkg' failed — resolve manually:"
+      sed 's/^/    /' "$TMP_ERR" || true
+      fail=$((fail + 1))
+    fi
+  done
+  log "stowed: $ok ok, $fail with conflicts"
+}
+
+restore_portage() {
+  log "copying /etc/portage config from repo"
+  run_root cp -a "$REPO_DIR/portage/etc/portage/." /etc/portage/
+
+  log "copying /var/lib/portage/world from repo"
+  run_root cp -a "$REPO_DIR/portage/var/lib/portage/world" /var/lib/portage/world
+
+  run_root find /etc/portage -type f -name .gitkeep -delete
+
+  for d in "${PORTAGE_EMPTY_DIRS[@]}"; do
+    run_root mkdir -p "/etc/portage/$d"
+  done
+}
+
+restore_system_configs() {
+  log "installing /etc/fstab from repo"
+  run_root cp -a "$REPO_DIR/fstab/etc/fstab" /etc/fstab
+
+  if [[ -f "$REPO_DIR/config.toml" ]]; then
+    log "installing /etc/greetd/config.toml from repo"
+    run_root mkdir -p /etc/greetd
+    run_root cp -a "$REPO_DIR/config.toml" /etc/greetd/config.toml
+  fi
+}
+
+check_notes() {
+  if [[ ! -x "$HOME/.local/bin/start-niri.sh" ]]; then
+    warn "~/.local/bin/start-niri.sh not found; greetd (config.toml) and PATH reference it."
+    warn "  create it manually or place it in a stowed package before the session is usable."
+  fi
+  if grep -q '/home/seraphim' "$REPO_DIR/config.toml" 2>/dev/null; then
+    warn "config.toml hardcodes /home/seraphim paths — adjust for your username if different."
+  fi
+  if grep -q '/march=znver3' "$REPO_DIR/portage/etc/portage/make.conf"; then
+    warn "make.conf targets Zen 3 (znver3) and CPU_FLAGS_X86 — review if other hardware."
+  fi
+}
+
+emerge_world() {
+  local ans
+  read -r -p "Run 'emerge --sync && emerge -uDN @world' now? [y/N] " ans
+  if [[ "${ans,,}" =~ ^y ]]; then
+    run_root emerge --sync
+    run_root emerge -uDN @world
+  else
+    log "skip — run manually: emerge --sync && emerge -uDN @world"
+  fi
+}
+
+main() {
+  need_stow
+  stow_dotfiles
+  restore_portage
+  restore_system_configs
+  check_notes
+  emerge_world
+  log "done."
+}
+
+main "$@"
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