mirror of
https://github.com/LerianStudio/ring
synced 2026-04-21 13:37:27 +00:00
4529d5bede
Move the duplicated find_active_ledger() function from ledger-save.sh and session-start.sh into a new shared/lib/ledger-utils.sh utility. Both hooks now source the shared library with fallback definitions for robustness. This follows the DRY principle and centralizes the security-conscious implementation (symlink rejection, null-terminated paths, portable stat). Generated-by: Claude Code AI-Model: claude-opus-4-5-20251101
54 lines
1.7 KiB
Bash
54 lines
1.7 KiB
Bash
#!/usr/bin/env bash
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# shellcheck disable=SC2034 # Unused variables OK for exported config
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# Shared ledger utilities for Ring hooks
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# Usage: source this file, then call find_active_ledger "$ledger_dir"
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# Find active ledger (most recently modified) - SAFE implementation
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# Finds the newest CONTINUITY-*.md file in the specified directory
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#
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# Arguments:
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# $1 - ledger_dir: Path to the directory containing CONTINUITY-*.md files
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#
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# Returns:
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# Prints the path to the most recently modified ledger file, or empty string if none found
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#
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# Security:
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# - Rejects symlinks explicitly (prevents symlink attacks)
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# - Uses null-terminated paths (prevents injection via malicious filenames)
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# - Portable across macOS/Linux (handles stat differences)
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find_active_ledger() {
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local ledger_dir="$1"
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# Return empty if directory doesn't exist
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[[ ! -d "$ledger_dir" ]] && echo "" && return 0
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local newest=""
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local newest_time=0
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# Safe iteration with null-terminated paths
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while IFS= read -r -d '' file; do
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# Security: Reject symlinks explicitly
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if [[ -L "$file" ]]; then
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echo "Warning: Skipping symlink: $file" >&2
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continue
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fi
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# Get modification time (portable across macOS/Linux)
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local mtime
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if [[ "$(uname)" == "Darwin" ]]; then
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mtime=$(stat -f %m "$file" 2>/dev/null || echo 0)
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else
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mtime=$(stat -c %Y "$file" 2>/dev/null || echo 0)
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fi
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if (( mtime > newest_time )); then
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newest_time=$mtime
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newest="$file"
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fi
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done < <(find "$ledger_dir" -maxdepth 1 -name "CONTINUITY-*.md" -type f -print0 2>/dev/null)
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echo "$newest"
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}
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# Export for subshells
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export -f find_active_ledger 2>/dev/null || true
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