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Self-install a PATH wrapper so setup.sh works from any directory

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Every invocation of setup.sh (bare, --list/--status, or with a service
name) now ensures /usr/local/bin/post-install exists and execs this
checkout's setup.sh by its real resolved path -- idempotent (only
writes when missing or pointing somewhere else) and silent except for
a one-line notice the first time it's actually created. Previously
this required cd'ing into the repo (or a manually-created wrapper) on
every box separately; now it's automatic on first run, no separate
setup step.

A plain symlink wouldn't have worked here: setup.sh finds its own
directory via ${BASH_SOURCE[0]}, which bash doesn't resolve through
symlinks, so a symlinked invocation would have set HERE to the
symlink's own directory instead of the repo's.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SpKTLpwAgZNooTacWeQLuc
This commit is contained in:
Claude
2026-08-23 23:45:12 +00:00
parent 8bd0c0f66d
commit a5085cc65b
1 changed files with 25 additions and 0 deletions
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setup.sh
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@@ -26,6 +26,31 @@ set -uo pipefail
HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# ── Self-install a PATH wrapper, so "cd into the repo every time" stops
# being necessary after the first run ────────────────────────────────────
# ${BASH_SOURCE[0]}-based HERE above means a plain symlink into
# /usr/local/bin wouldn't resolve correctly (bash doesn't follow symlinks
# for BASH_SOURCE, so a symlinked invocation would set HERE to the
# symlink's own directory, not this repo's) — a thin wrapper that execs
# THIS checkout's setup.sh by its real, already-resolved path sidesteps
# that entirely. Runs on every invocation (bare, --list/--status, or a
# service name) but is idempotent and silent unless something actually
# needs writing, so it doesn't add noise to a normal run. Root-only: a
# non-root invocation (e.g. --list) can't write to /usr/local/bin anyway,
# and skipping silently beats a permission-denied on every read-only
# command.
if [ "${EUID:-$(id -u)}" -eq 0 ]; then
_CLI_WRAPPER="/usr/local/bin/post-install"
_WANT_WRAPPER="#!/bin/bash
exec \"${HERE}/setup.sh\" \"\$@\""
if [ "$(cat "$_CLI_WRAPPER" 2>/dev/null)" != "$_WANT_WRAPPER" ]; then
if printf '%s\n' "$_WANT_WRAPPER" > "$_CLI_WRAPPER" 2>/dev/null && chmod +x "$_CLI_WRAPPER" 2>/dev/null; then
echo "[INFO] Installed 'post-install' — run it from anywhere from now on (e.g. post-install asterisk)."
fi
fi
unset _CLI_WRAPPER _WANT_WRAPPER
fi
# whiptail requires a valid TERM; when piped through bash (curl | bash) TERM
# may be unset, causing raw-mode to fail and arrow keys to leak to the shell.
export TERM="${TERM:-xterm-256color}"