From 53e82d802dba330ec8e5a568d6250e04f1193f0c Mon Sep 17 00:00:00 2001
From: Craig Jennings <c@cjennings.net>
Date: Fri, 23 Jan 2026 20:02:02 -0600
Subject: Phase 1.4: Add filesystem selection prompt

- Add FILESYSTEM variable to config (zfs or btrfs)
- Add select_filesystem() function with fzf support
- Update gather_input() to prompt for filesystem in interactive mode
- Add validation for FILESYSTEM in unattended mode
- Btrfs selection errors with "not yet implemented"
- Update banner to show "Archangel" branding
- Update config example with FILESYSTEM option

Groundwork for btrfs support - filesystem choice is now captured,
installation logic gates on FILESYSTEM variable.
---
 custom/lib/common.sh | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'custom/lib/common.sh')

diff --git a/custom/lib/common.sh b/custom/lib/common.sh
index 2f8844e..c271aec 100644
--- a/custom/lib/common.sh
+++ b/custom/lib/common.sh
@@ -100,6 +100,38 @@ fzf_multi() {
     fi
 }
 
+#############################
+# Filesystem Selection
+#############################
+
+# Select filesystem type (ZFS or Btrfs)
+# Sets global FILESYSTEM variable
+select_filesystem() {
+    step "Select Filesystem"
+
+    local options=(
+        "ZFS - Native encryption, best data integrity (recommended)"
+        "Btrfs - Native Linux, GRUB snapshot boot"
+    )
+
+    local selected
+    selected=$(fzf_select "Filesystem:" "${options[@]}")
+
+    case "$selected" in
+        ZFS*)
+            FILESYSTEM="zfs"
+            info "Selected: ZFS"
+            ;;
+        Btrfs*)
+            FILESYSTEM="btrfs"
+            info "Selected: Btrfs"
+            ;;
+        *)
+            error "No filesystem selected"
+            ;;
+    esac
+}
+
 #############################
 # Disk Utilities
 #############################
-- 
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