feat: add do_suggest scan/filter/dedup function

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 84 insertions, 0 deletions

diff --git a/dot-backup.sh b/dot-backup.sh
index 2ffdbcc..21388f0 100755
--- a/dot-backup.sh
+++ b/dot-backup.sh
@@ -226,6 +226,90 @@ do_rsync() {
     fi
 }
 
+# ── SUGGEST MODE ──────────────────────────────────────────────────────────────
+
+# True if candidate path $1 is already covered by any DOTFILES entry
+# (exact match, parent of, or child of an existing entry).
+_suggest_covered() {
+    local c="$1" e
+    for e in "${DOTFILES[@]}"; do
+        # normalize trailing slash
+        e="${e%/}"
+        [[ "$c" == "$e" ]] && return 0
+        [[ "$c" == "$e"/* ]] && return 0
+        [[ "$e" == "$c"/* ]] && return 0
+    done
+    return 1
+}
+
+# True if basename $1 is in SUGGEST_IGNORE
+_suggest_ignored() {
+    local b="$1" ig
+    for ig in "${SUGGEST_IGNORE[@]}"; do
+        [[ "$b" == "$ig" ]] && return 0
+    done
+    return 1
+}
+
+do_suggest() {
+    local epoch_file="${DEFAULT_OUTPUT_DIR}/lastupdate.epoch"
+    local last_epoch=0
+    local last_human="never"
+    if [[ -r "$epoch_file" ]]; then
+        local raw
+        raw="$(cat "$epoch_file")"
+        if [[ "$raw" =~ ^[0-9]+$ ]]; then
+            last_epoch="$raw"
+            last_human="$(date -d "@$last_epoch" 2>/dev/null || echo "$last_epoch")"
+        fi
+    fi
+
+    local -a candidates=()
+    local path emit base mtime
+
+    # Source 1: ~/.config/*  (children of .config)
+    for path in "${HOME}/.config/"*; do
+        [[ -e "$path" ]] || continue
+        base="$(basename "$path")"
+        emit=".config/${base}"
+        _suggest_ignored "$base" && continue
+        _suggest_covered "$emit" && continue
+        mtime="$(stat -c %Y "$path" 2>/dev/null || echo 0)"
+        (( mtime > last_epoch )) && candidates+=("$emit")
+    done
+
+    # Source 2 + 3: ~/.*  (hidden dirs and files at home top level)
+    for path in "${HOME}/".*; do
+        base="$(basename "$path")"
+        [[ "$base" == "." || "$base" == ".." ]] && continue
+        [[ -d "$path" || -f "$path" ]] || continue
+        emit="${base}"
+        _suggest_ignored "$base" && continue
+        _suggest_covered "$emit" && continue
+        mtime="$(stat -c %Y "$path" 2>/dev/null || echo 0)"
+        (( mtime > last_epoch )) && candidates+=("$emit")
+    done
+
+    if [[ ${#candidates[@]} -eq 0 ]]; then
+        echo -e "${GREEN}No new config dirs/files since last backup.${NC}"
+        return 0
+    fi
+
+    # sort alphabetically, stable output
+    local -a sorted=()
+    while IFS= read -r line; do sorted+=("$line"); done < <(printf '%s\n' "${candidates[@]}" | sort -u)
+
+    echo -e "${GREEN}New since last backup (${last_human}):${NC}"
+    for emit in "${sorted[@]}"; do
+        echo -e "  ${BLUE}${emit}${NC}"
+    done
+    echo
+    echo "Paste into files.list:"
+    for emit in "${sorted[@]}"; do
+        echo "$emit"
+    done
+}
+
 # ── RESTORE MODE ──────────────────────────────────────────────────────────────
 
 do_restore() {