first-boot-logic

files/usr/lib/system-preset/90-fluffy-pancake-firstboot.preset

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+enable fluffy-pancake-firstboot.service

files/usr/lib/system/fluffy-pancake-firstboot.service

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+[Unit]
+Description=Fluffy Pancake First Boot Initialization
+ConditionFirstBoot=yes
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/libexec/fluffy-pancake/firstboot.sh
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target

files/usr/libexec/fluffy-pancake/firstboot.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+echo "[firstboot] Starting first boot initialization"
+
+# -------------------------------------------------------------------
+# Initialize Homebrew (no updates, no network dependency)
+# -------------------------------------------------------------------
+if [ -x /home/linuxbrew/.linuxbrew/bin/brew ]; then
+  echo "[firstboot] Initializing Homebrew environment"
+
+  export HOMEBREW_PREFIX="/home/linuxbrew/.linuxbrew"
+  export HOMEBREW_CELLAR="$HOMEBREW_PREFIX/Cellar"
+  export HOMEBREW_REPOSITORY="$HOMEBREW_PREFIX/Homebrew"
+  export PATH="$HOMEBREW_PREFIX/bin:$HOMEBREW_PREFIX/sbin:$PATH"
+
+  brew config >/dev/null
+else
+  echo "[firstboot] Homebrew not present, skipping"
+fi
+
+# -------------------------------------------------------------------
+# Ensure Flathub exists
+# -------------------------------------------------------------------
+if ! flatpak remote-list --system | grep -q '^flathub'; then
+  echo "[firstboot] Adding Flathub remote"
+  flatpak remote-add --system --if-not-exists flathub \
+    https://flathub.org/repo/flathub.flatpakrepo
+fi
+
+# -------------------------------------------------------------------
+# Flatpak preinstall
+# -------------------------------------------------------------------
+echo "[firstboot] Installing Flatpaks"
+
+flatpak install --system --noninteractive flathub \
+  org.mozilla.firefox \
+  org.gnome.Calculator
+
+echo "[firstboot] First boot initialization complete"