Gateway scripts: find ecce-session-lib.sh beside a symlink's target too

b3ca4e4 dropped readlink -f (missing on macOS 10.15), so a gateway script
run through a symlink whose directory has no ecce-session-lib.sh (the test
isolates link bin/ scripts one by one) fell back to $ECCE_HOME/bin and
failed there: tests/teaching on main stopped at 'services did not start'.
Follow one level of plain readlink before the $ECCE_HOME fallback.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFPK14wBcLD1s4dYUowpP4

Author: andy

packaging/gateway/ecce-gateway-reap

@@ -37,7 +37,13 @@ ECCE_HOME="${ECCE_HOME:-/opt/ecce}"
 ECCE_REALUSERHOME="${ECCE_REALUSERHOME:-$HOME}"
 STATEDIR="$ECCE_REALUSERHOME/.ECCE"
 UID_="$(id -u)"
+# Beside the script, else beside its symlink target (plain readlink: no -f
+# on macOS 10.15), else in $ECCE_HOME/bin.
 _lib="$(dirname "$0")/ecce-session-lib.sh"
+if [ ! -r "$_lib" ] && _t=$(readlink "$0" 2>/dev/null); then
+  case $_t in /*) ;; *) _t="$(dirname "$0")/$_t" ;; esac
+  _lib="$(dirname "$_t")/ecce-session-lib.sh"
+fi
 [ -r "$_lib" ] || _lib="$ECCE_HOME/bin/ecce-session-lib.sh"
 . "$_lib" || { echo "ecce-gateway-reap: cannot read $_lib" >&2; exit 1; }
 

packaging/gateway/ecce-gateway-start

@@ -20,7 +20,13 @@ export ECCE_REALUSERHOME="${ECCE_REALUSERHOME:-$HOME}"
 export ECCE_REALUSER="${ECCE_REALUSER:-$(id -un)}"
 export HOST="${HOST:-$(hostname)}"
 
+# Beside the script, else beside its symlink target (plain readlink: no -f
+# on macOS 10.15), else in $ECCE_HOME/bin.
 _lib="$(dirname "$0")/ecce-session-lib.sh"
+if [ ! -r "$_lib" ] && _t=$(readlink "$0" 2>/dev/null); then
+  case $_t in /*) ;; *) _t="$(dirname "$0")/$_t" ;; esac
+  _lib="$(dirname "$_t")/ecce-session-lib.sh"
+fi
 [ -r "$_lib" ] || _lib="$ECCE_HOME/bin/ecce-session-lib.sh"
 . "$_lib" || { echo "ecce-gateway-start: cannot read $_lib" >&2; exit 1; }
 ecce_session_ensure

packaging/gateway/ecce-gateway-status

@@ -14,7 +14,13 @@ shared=""
 
 # The broker file is what the processes actually use: this session's, or
 # failing that any one of this account's.
+# Beside the script, else beside its symlink target (plain readlink: no -f
+# on macOS 10.15), else in $ECCE_HOME/bin.
 _lib="$(dirname "$0")/ecce-session-lib.sh"
+if [ ! -r "$_lib" ] && _t=$(readlink "$0" 2>/dev/null); then
+  case $_t in /*) ;; *) _t="$(dirname "$0")/$_t" ;; esac
+  _lib="$(dirname "$_t")/ecce-session-lib.sh"
+fi
 [ -r "$_lib" ] || _lib="$ECCE_HOME/bin/ecce-session-lib.sh"
 . "$_lib" || { echo "ecce-gateway-status: cannot read $_lib" >&2; exit 1; }
 bfile="$(ecce_broker_file)" || bfile=""

packaging/gateway/ecce-gateway-stop

@@ -7,7 +7,13 @@ set -u
 ECCE_REALUSERHOME="${ECCE_REALUSERHOME:-$HOME}"
 STATEDIR="$ECCE_REALUSERHOME/.ECCE"
 ECCE_HOME="${ECCE_HOME:-/opt/ecce}"
+# Beside the script, else beside its symlink target (plain readlink: no -f
+# on macOS 10.15), else in $ECCE_HOME/bin.
 _lib="$(dirname "$0")/ecce-session-lib.sh"
+if [ ! -r "$_lib" ] && _t=$(readlink "$0" 2>/dev/null); then
+  case $_t in /*) ;; *) _t="$(dirname "$0")/$_t" ;; esac
+  _lib="$(dirname "$_t")/ecce-session-lib.sh"
+fi
 [ -r "$_lib" ] || _lib="$ECCE_HOME/bin/ecce-session-lib.sh"
 . "$_lib" || { echo "ecce-gateway-stop: cannot read $_lib" >&2; exit 1; }
 # The data server credential this session's processes share through