66 lines
2.2 KiB
Bash
Executable File
66 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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# post-tool-use.sh - PostToolUse hook for auto-reset after git commit
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# Purpose: Reset bumper-lanes baseline after successful git commits
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# Hook: PostToolUse with Bash matcher
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# Trigger: After Bash tool completes successfully
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# Source library functions
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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source "$SCRIPT_DIR/../lib/git-state.sh"
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source "$SCRIPT_DIR/../lib/state-manager.sh"
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# Read hook input from stdin
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input=$(cat)
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session_id=$(echo "$input" | jq -r '.session_id')
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tool_name=$(echo "$input" | jq -r '.tool_name')
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hook_event_name=$(echo "$input" | jq -r '.hook_event_name')
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command=$(echo "$input" | jq -r '.tool_input.command // empty')
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# Validate hook event (defensive check)
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if [[ "$hook_event_name" != "PostToolUse" ]]; then
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exit 0
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fi
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# Only process Bash tool calls
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if [[ "$tool_name" != "Bash" ]]; then
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exit 0
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fi
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# Detect git commit commands (various formats)
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# Pattern: git, optional flags (like -C /path), then commit subcommand
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# Matches: git commit, git -C /path commit, git --git-dir=/x commit
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# Rejects: prose like "use git to commit" (non-flag words between git and commit)
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if ! echo "$command" | grep -qE 'git\s+(-{1,2}[A-Za-z-]+([ =]("[^"]*"|\S+))?\s+)*commit\b'; then
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exit 0
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fi
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# Check if session state exists (session-only enforcement)
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if ! session_state=$(read_session_state "$session_id" 2>/dev/null); then
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# No session state - not enforcing, no reset needed (fail-open)
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exit 0
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fi
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# Capture tree SHA from the commit that just happened
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# Use HEAD^{tree} to get the tree from the commit, not current index state
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# This ensures we capture exactly what was committed, not what's staged
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if ! current_tree=$(git rev-parse HEAD^{tree} 2>/dev/null); then
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# Failed to get commit tree - fail open (don't break git workflow)
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exit 0
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fi
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# Reset baseline to current tree (committed state)
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if ! reset_baseline_after_commit "$session_id" "$current_tree" 2>/dev/null; then
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# Reset failed - fail open
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exit 0
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fi
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# Output structured feedback for Claude Code
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# PostToolUse hooks return JSON with systemMessage to inform the agent
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jq -n '{
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systemMessage: "✓ Bumper lanes: Auto-reset after commit. Fresh budget: 400 pts."
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}'
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exit 0
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