X wcfs: Remove old cruft

- gen-δtail is not used - we are building ΔFtail from scratch.
- gogcccrash did its work and the problem is now understood.

wcfs/gen-δtail

-#!/bin/bash -e
-# δtail.go.in -> specialized with concrete types
-# gen-δtail KIND ID out
-
-# Copyright (C) 2018-2021  Nexedi SA and Contributors.
-#                          Kirill Smelkov <kirr@nexedi.com>
-#
-# This program is free software: you can Use, Study, Modify and Redistribute
-# it under the terms of the GNU General Public License version 3, or (at your
-# option) any later version, as published by the Free Software Foundation.
-#
-# You can also Link and Combine this program with other software covered by
-# the terms of any of the Free Software licenses or any of the Open Source
-# Initiative approved licenses and Convey the resulting work. Corresponding
-# source of such a combination shall include the source code for all other
-# software used.
-#
-# This program is distributed WITHOUT ANY WARRANTY; without even the implied
-# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-#
-# See COPYING file for full licensing terms.
-# See https://www.nexedi.com/licensing for rationale and options.
-
-# TODO kill this after finishing ΔFtail (zodb/δtail.go generic is not used here)
-
-KIND=$1
-ID=$2
-out=$3
-
-zodb=lab.nexedi.com/kirr/neo/go/zodb
-zdir=`go list -f '{{.Dir}}' $zodb`
-zrev=`git -C $zdir describe --always`
-
-echo "// Code generated by gen-δtail $KIND $ID; DO NOT EDIT." >$out
-echo "// (from $zodb @ $zrev)" >>$out
-echo >>$out
-
-$zdir/δtail.go.cat-generic | sed		\
-	-e "s/PACKAGE/main/g"			\
-	-e "s/ID/$ID/g"				\
-	-e "s/ΔTail/ΔTail${KIND}/g"		\
-	-e "s/δRevEntry/δRevEntry${KIND}/g"	\
-	>>$out

wcfs/gogccrash

-#!/bin/bash -e
-# tries to minimize reproducer for https://github.com/golang/go/issues/41303
-
-export GOTRACEBACK=crash
-ulimit -c unlimited
-
-go test -c
-
-cwd=$(pwd)
-
-# runtest1
-function runtest1() {
-	for i in `seq 1000`; do
-		echo -e "\n>>> #$i"
-		#GOGC=1 $cwd/wcfs.test -test.v -test.run 'TestZBlk|TestΔBTail|TestΔBTreeAllStructs' || break
-		#GOGC=1 $cwd/wcfs.test -test.v -test.run 'TestZBlk|TestΔBTail' || break
-		#GOGC=0 $cwd/wcfs.test -test.v -test.run 'TestZBlk|TestΔBTail' || break
-		GOGC=0 $cwd/wcfs.test -test.v -test.count=100 -test.run 'TestZBlk|TestΔBTail' || break
-	done
-}
-
-nwork=2
-rm -rf BUG
-for n in `seq $nwork`; do
-	workdir=BUG/$n
-	mkdir -p $workdir
-	ln -s $cwd/testdata $workdir
-	ln -s $cwd/testprog $workdir
-	(cd $workdir && runtest1 >>log 2>&1) &
-done
-
-wait -n
-echo "done, crashes:"
-find BUG -name "*core*"
-
-echo
-kill `jobs -p`
-wait

wcfs/wcfs.go

@@ -628,7 +628,6 @@ type BigFile struct {
 //	//
 //	// XXX computationally expensive to start - see "Invalidations to wcfs
 //	// clients are delayed ..." in notes.txt
-//	//go:generate ./gen-δtail I64 int64 zδtail_i64.go
 //	δtail *ΔTailI64 // [](rev↑, []#blk)
 
 	// blocks that were ever read-accessed (head/ only)	XXX locking by bfdir.δFmu ?