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ersatztv/.claude/hooks/posttooluse-worktree-marker.sh
T
timothyandtimothy 499dd348ab
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feat(776): every hook reports that it fired, and the report is measured (#795)
Co-authored-by: Timothy <timothy@noreply.gitea.tblindustries.be>
2026-08-14 19:11:05 +00:00

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#!/usr/bin/env bash
# PostToolUse / Bash — after a successful `git worktree add`, stamp the new worktree with
# this session's id (.claude-worktree-owner) so pretooluse-worktree-guard.sh (H7) can tell
# a sibling worktree another session created apart from this session's own.
# Fail-safe: any parse trouble → do nothing (the guard stays fail-open without a marker).
set -euo pipefail
# ersatztv#776 — report that this hook fired. MUST precede any stdin read.
# Claude hook: decides by printed JSON, so stdout is captured.
ETV_HOOK_FIRE_LIB="${CLAUDE_PROJECT_DIR:-$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/../.." 2>/dev/null && pwd)}/scripts/hook-fire-log.sh" || true
[ -r "$ETV_HOOK_FIRE_LIB" ] && . "$ETV_HOOK_FIRE_LIB" || true
type etv_hook_fire_begin >/dev/null 2>&1 || etv_hook_fire_begin() { :; }
etv_hook_fire_begin posttooluse-worktree-marker "" capture || true
input=$(cat)
cmd=$(printf '%s' "$input" | jq -r '.tool_input.command // ""' 2>/dev/null || true)
cwd=$(printf '%s' "$input" | jq -r '.cwd // ""' 2>/dev/null || true)
me=$(printf '%s' "$input" | jq -r '.session_id // ""' 2>/dev/null || true)
printf '%s' "$cmd" | grep -qE 'git[[:space:]]+worktree[[:space:]]+add\b' || exit 0
[ -z "$me" ] && exit 0
[ -z "$cwd" ] && cwd="$PWD"
# Extract the <path> arg of `git worktree add [flags] <path> [<commit-ish>]`.
# Skip flags; skip the values of the value-taking flags (-b/-B/--reason). Worktree paths
# in this repo have no spaces, so whitespace tokenization is safe.
add_args=$(printf '%s' "$cmd" | sed -E 's/.*git[[:space:]]+worktree[[:space:]]+add[[:space:]]+//')
path=""
skip=0
for tok in $add_args; do
if [ "$skip" = 1 ]; then skip=0; continue; fi
case "$tok" in
-b|-B|--reason) skip=1; continue ;;
--) continue ;;
-*) continue ;;
*) path=$(printf '%s' "$tok" | tr -d '"'"'"''); break ;;
esac
done
[ -z "$path" ] && exit 0
case "$path" in /*) abs="$path" ;; *) abs="$cwd/$path" ;; esac
[ -d "$abs" ] || exit 0
# Don't clobber a marker a different session already planted.
[ -f "$abs/.claude-worktree-owner" ] && exit 0
printf '%s\n' "$me" > "$abs/.claude-worktree-owner" 2>/dev/null || true
exit 0